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POWER SUPPLY FAILURE
psu lemon list
DO NOT LET IT HAPPEN!

PSU Lemon List

PC Power Supply Problems and Issues

The power supply lemon list identifies psu's to avoid. The PSU Lemon List includes descriptions of problems found and links to the hardware reviews that discovered the psu problems, issues, and flaws.

To find a high quality power supply for your computer that is safe, stable, and reliable please check the Power Supply Recommendations List.

If you are upgrading your graphics card or adding a second card for CrossFireX or SLI please check the GPU Power Requirements Page.

NOTA BENE - Only brands and models that were reviewed and tested by competent hardware review sites are listed. There may be additional brands and models that would qualify for the psu lemon list but they are not listed because they were not reviewed or subjected to rigorous testing.


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ABS
Model Watts Problems and Issues Reviews
Majesty MJ1100-M 1,100 Not quite 80 Plus Gold as adverised. Failed DC output quality. Out of spec ripple and noise suppression. Hard OCP
Please read the power supply reviews for detailed descriptions of problems and issues.


Acbel Polytech
Model Watts Problems and Issues Reviews
iPower 660 660 Misleading label. It is only a 610 watt power supply. Could only deliver half of rated power. Hardware Secrets
Please read the power supply reviews for detailed descriptions of problems and issues.


Ace
Model Watts Problems and Issues Reviews
AC 230V 550 Won't do 550 watts, barely does 350 watts. Poor quality capacitors. Protection circuitry issues. Box marketing claims certifications the unit doesn't have. APFC circuit not very efficient. Poor standby efficiency. jonnyGURU
Please read the power supply reviews for detailed descriptions of problems and issues.


AeroCool
Model Watts Problems and Issues Reviews
E85M-550 550 Did not meet Bronze effcieincy at load. Voltage regulation failed on -12V rail during light load test. Ripple and noise high at 550 watts. Hardware Secrets
V12XT 600 Did not meet Bronze effcieincy at load. Voltage regulation failed on -12V rail during light load test. Ripple and noise high at 600 watts. Hardware Secrets
VP-550 550 No certification. No dedicated voltage regulation. Poor cross-load voltage stability. +3.3V, +5V, and +12V rails went out of spec. Xbit Laboratories
VP-650 650 No certification. No dedicated voltage regulation. Poor cross-load voltage stability. +3.3V, +5V, and +12V rails went out of spec. Xbit Laboratories
VP-750 750 No certification. Poor cross-load voltage stability. Xbit Laboratories
Please read the power supply reviews for detailed descriptions of problems and issues.


Akasa
Model Watts Problems and Issues Reviews
Essential Power 350 +12 voltage dropped below minimum allowed. Poor efficiency. Only one SATA power power cable with two connectors. Hardware Secrets
Paxpower 500 Would not turn on when EPS12V connector was used. Efficiency dropped above 300 watts. Only one video power cable with two connectors. Hardware Secrets
Please read the power supply reviews for detailed descriptions of problems and issues.


Allied
Model Watts Problems and Issues Reviews
AL-D500EXP 500 Exploded during testing. OCP failed. Poor voltage regulation. Low quality capacitors. jonnyGURU
Please read the power supply reviews for detailed descriptions of problems and issues.


Apevia
Model Watts Problems and Issues Reviews
Turbolink
ATX-TL450W-BK
450 Not 450 watts. Can only deliver 240 watts. Ripple and noise suppression out of spec. No required filtering coils in secondary. No Efficiency. Only one SATA power connector and no video card power connector. Hardware Secrets
Warlock Power 900 Not 900 watts as advertised. OCP and OTP missing. Terrible voltage regulation. Died four times during testing. Out of ATX spec on several tests. jonnyGURU
Aspire Beast 680 Not 680 watts as advertised. Advertised voltages and amperages are incorrect. Shut down during testing. Mediocre efficiency. jonnyGURU
Aspire X-Qpack 420 False power supply label. Not 420 watts as advertised. Delivered less than 300 watts. No PFC. Poor efficiency. jonnyGURU
Please read the power supply reviews for detailed descriptions of problems and issues.


Arctic Cooling
Model Watts Problems and Issues Reviews
Fusion 550RF 550 Not 550 watts as advertised. Thin gauge power cable wires. No EPS12V connector. Limited number of power cable connectors. Hardware Secrets, jonnyGURU
Please read the power supply reviews for detailed descriptions of problems and issues.


Asus
Model Watts Problems and Issues Reviews
Atlas A-45GA 450 Not 450 watts as advertised. Could only deliver 365 watts. Poor efficiency. Hardware Secrets,
P-50GA 500 No certification. Extremely poor effociency. Hardware Secrets,
Please read the power supply reviews for detailed descriptions of problems and issues.


Athena Power
Model Watts Problems and Issues Reviews
AP-MFATX35 350 High Ripple and noise suppression levels. Failed temperature testing. First unit burned one minute into testing at 350 watts Hardware Secrets, KitGuru
AP-TFX40 400 Specifications on retail box and psu do not match. Loose 12V Connector contact. Standoff screw hole missing for upper left corner of mainboard. Plastic insulator worn down due to soldering. Loose screw securing heatsinks. jonnyGURU
Please read the power supply reviews for detailed descriptions of problems and issues.


ATNG
Model Watts Problems and Issues Reviews
Premier
PS-ATX-300P4
300 Failed to power up. Wires too thin. Low quality capacitors. Poor input filtering. jonnyGURU
Please read the power supply reviews for detailed descriptions of problems and issues.


be quiet! - Listan GmbH und Co. KG
Model Watts Problems and Issues Reviews
Straight Power E8-400W 400 Non-primary rails have very mediocre voltage regulation. Ripple was high on +12V rail. Hodge podge of second and third tier capacitors. Primary capacitors are 85C instead of 105C. Only one PCIe power connector. jonnyGURU
System Power 7 400 Terrible Ripple Hardware Info
Please read the power supply reviews for detailed descriptions of problems and issues.


Bestec
Model Watts Problems and Issues Reviews
ATX-250-12E 250 Infamous for frying motherboards. Ancient ATX12V 1.3 design. 5VSB performance is awful. Below average build quality. jonnyGURU
Please read the power supply reviews for detailed descriptions of problems and issues.


BFG
Model Watts Problems and Issues Reviews
ES-800
BFGR800WESPSU
800 factory Recall. Design Flaw. Huge electrical noise problem. Hardware Secrets
Please read the power supply reviews for detailed descriptions of problems and issues.


Chieftec
Model Watts Problems and Issues Reviews
650 650 Not 650 watts as advertised. Exploded during testing. Thin wires. Tiny heatsinks. Low value input caps of unknown origin. Also sold under Leadman Power and Powmax brand names. jonnyGURU
Nitro 2 450 Not 550 watts as advertised. Hardware Info
Please read the power supply reviews for detailed descriptions of problems and issues.


Conceptronic
Model Watts Problems and Issues Reviews
Desktop Power 500 Not 500 watts as advertised. No overload protection. Very poor efficiency. Hardware Info
Desktop Power 600 Not 600 watts as advertised. No overload protection. Very poor efficiency. Hardware Info
Desktop Power 700 Not 700 watts as advertised. No overload protection. Very poor efficiency. Hardware Info
Please read the power supply reviews for detailed descriptions of problems and issues.


Cooler Master
Model Watts Problems and Issues Reviews
Elite Power 350 Lousy efficiency. Does not have two +12volt rails as advertised. No Over Current Protection as advertised. No Over Power Protection as advertised. Hardware Secrets
Elite Power 400 Poor efficiency. Noise and ripple levels very high. Hardware Secrets, Hardware Info
Elite Power 460 Not 460 watt as advertised. Identical to Elite Power 400 watt model. No over current protection as advertised. Hardware Secrets
Extreme 2 475 Not 475 watt as advertised. Voltages drop below minimum allowed. Ripple and noise increase above minimum allowed. Hardware Secrets
eXtreme Power Plus 400 Very Poor efficiency. Ripple and Noise above maximum allowed. Hardware Secrets
eXtreme Power Plus 460 Not a 460 watt power supply as advertised. Hardware Secrets
eXtreme Power Plus 500 Very Poor efficiency. Ripple and Noise above maximum allowed. Hardware Secrets
eXtreme Power Plus 550 Burned during load tests. Not 550 watt as advertised. Could only deliver 500 watts. Very Poor efficiency. Hardware Secrets
eXtreme Power Plus 600 Burned during load tests. Not 600 watt as advertised. Could only deliver 450 watts. Voltages regulation out of spec. Very Poor efficiency. Hardware Secrets
GX-650 650 Failed efficiency rating. Failed load testing. Medicore voltage regulation. Poor DC output quality on 3.3V rails. Outdated design. Hard OCP
GX-750 750 Cannot handle heat at 750 watts. Ripple issues on the 3.3V rail. Noise level on +3.3V and +5VSB above maximum allowed. Questionable capacitor quality. Poor Voltage Regulation. Efficiency lower than advertised. jonnyGURU, Hardware Secrets, Hardware Heaven
Please read the power supply reviews for detailed descriptions of problems and issues.


CoolMax
Model Watts Problems and Issues Reviews
ZX Series 500 Not 500 watts as advertised. Did not meet advertised certifications. No sign of protection circuitry. Voltage regulation easily affected for the worse by just a little heat. 5VSB failed overshoot transient testing. Second tier capacitors. No thermal fan controller. Sleeve bearing fan. Only partial AC line filtering, Only partial DC output filtering on the 5V and 12V rails. jonnyGURU
Green Power 500 Not 500 watts as advertised. Couldn't do over 450W in either the cold or hot tests. Voltage regulation was awful. jonnyGURU
CUG-700B 700 Not a 700 watt psu as advertised. Exploded during testing. No OCP. jonnyGURU
CUG-950B 950 Not 950 watts as advertised. Can only deliver 700 watts at room temperature. Dangerously high ripple above 700W. Can't cool itself well above 700W. Very poor voltage regulation above 700W. Very poor efficiency above 700W. OCP/OVP/UVP did not not work. jonnyGURU
V-500 500 Cannot deliver advertised wattage. Very Poor efficiency. Voltages out of spec. Noise and ripple above maximum allowed. Hardware Secrets
ZP-750B 750 Advertised as having 80 Plus Bronze Certification but it does not. Advertised as 750 watts but can only deliver 450 watts. Burned at 500 watts. Hardware Secrets 1, Hardware Secrets 2
ZP-850B 850 Advertised as having 80 Plus Bronze Certification but it does not. Hardware Secrets
ZP-1000B 1,000 Advertised as having 80 Plus Bronze Certification but it does not. Hardware Secrets
Please read the power supply reviews for detailed descriptions of problems and issues.


Cougar
Model Watts Problems and Issues Reviews
Couger A560
CGR BE-560
560 Failed load, temperature, and efficiency tests. Voltage regulation problems. Hardware Secrets
Couger RS650 650 Not 650 watt psu as advertised. Failed load, temperature, and efficiency tests. Hardware Secrets
Couger CMX 700 700 Voltage regulation out of spec starting at 560 watts. Hardware Secrets
Please read the power supply reviews for detailed descriptions of problems and issues.


Diablotek
Model Watts Problems and Issues Reviews
RPM-1050 1,050 Does not meet advertised specs. Can barely do 600 watts at room temperature. Failed hot box test at 42C. Voltage regulation and ripple suppression out of spec. Cable wires too thin for 1,050 watts. Questionable quality of capacitors. jonnyGURU
PHD650 650 Failed load tests. Terrible build quality. Poor component selection. Hard OCP
Please read the power supply reviews for detailed descriptions of problems and issues.


Dynex
Model Watts Problems and Issues Reviews
Dynex 400 400 Best Buy House Brand. Rebadged Huntkey Green Star 400. Poor Efficiency. Very high noise levels. Only 1 year warranty. Hardware Secrets
Please read the power supply reviews for detailed descriptions of problems and issues.


Eagle Tech
Model Watts Problems and Issues Reviews
Skyhawk Panther 620 Not 620 watts as advertised. Exploded during testing. No PFC or OCP. Poor voltage regulation. Low quality capacitors. Loud fan. Hardware Secrets
Please read the power supply reviews for detailed descriptions of problems and issues.


Enermax
Model Watts Problems and Issues Reviews
Liberty DXX 500 Almost all protections failed during testing. Hardware Secrets
Please read the power supply reviews for detailed descriptions of problems and issues.


FSP group
Model Watts Problems and Issues Reviews
Raider 750 Failed load testing. Voltage regulation well outside of ATX12v specifications. Poor DC output quality Hard OCP
Everest 700 Failed load testing. Poor fan design. jonnyGURU
Everest 900 Old Episilon design. Failed load testing. Exceeded ATX specs for ripple and noise on the 3.3V and 5V rails. Cost cutting measures. jonnyGURU
Hexa 400 Poor ripple Hardware Info
Please read the power supply reviews for detailed descriptions of problems and issues.


Gigabyte
Model Watts Problems and Issues Reviews
Superb 550-P 550 Not a 550 watt psu. Could only deliver 450 watts. Poor efficiency above 279 watts. Hardware Secrets
Please read the power supply reviews for detailed descriptions of problems and issues.


Hairong
Model Watts Problems and Issues Reviews
Delta DPS300-PB-1 300 Not 300 watts as advertised. Failed testing. Low quality capacitors. No bridge rectifier. jonnyGURU
Please read the power supply reviews for detailed descriptions of problems and issues.


Hercules
Model Watts Problems and Issues Reviews
Hercules 500 Absolutely, positively the worst power supply ever reviewed. Pure junk and a dangerous fire hazard!!! jonnyGURU
Please read the power supply reviews for detailed descriptions of problems and issues.


Hiper
Model Watts Problems and Issues Reviews
Type M 580 Very old design. Not suitable for modern pc. Poor Crossload tolerance. Poor cooling. jonnyGURU
Please read the power supply reviews for detailed descriptions of problems and issues.


Huntkey
Model Watts Problems and Issues Reviews
Green Star 350 Could only deliver 280 watts. Exploded at 350 advertised load. Only two SATA connectors. No power cables for video card. Hardware Secrets
Balance King 4500 450 Not a 450 watt psu. Exploded after 5 minutes of operation at 450 watts. Hardware Secrets
CP Series 350 Not a 350 watt psu. Efficiency well below advertised rating. Terrible ripple. High noise level. Hardware Info
CP Series 400 Not a 400 watt psu. Efficiency well below advertised rating. High noise level. Hardware Info
V-Power 550 Rebadged Green Star 550. Burned at 550 watts. Hardware Secrets
Green Star 450 450 Not 450 watts as advertised. Could only deliver 360 watts before exploding. Poor Efficiency. Wires too thing. High electrical noise. No protection. Hardware Secrets
Jumper 450B 450 Terrible Ripple Hardware Info
Please read the power supply reviews for detailed descriptions of problems and issues.


iMicro
Model Watts Problems and Issues Reviews
PS-IM400WH 400 Can only deliver 280 watts. Voltage regulation, ripple, and noise all out of spec. No actuve PFC circuit. Only one SATA connector and no video card power connector. Hardware Secrets
Please read the power supply reviews for detailed descriptions of problems and issues.


In Win
Model Watts Problems and Issues Reviews
Commander II 1,200 1,100 watt power supply rather than 1,200 watts advertised. Actual OCP on +12V rails is 38 amps instead of 40 amps advertised. Only rated to run continuously at 40C instead of 50C. Sloppy soldering. jonnyGURU, AnandTech
Please read the power supply reviews for detailed descriptions of problems and issues.


iStarUSA
Model Watts Problems and Issues Reviews
Claypower
CP-02046
460 3.3V ripple and noise suppression out of spec. jonnyGURU
Please read the power supply reviews for detailed descriptions of problems and issues.


Koolance
Model Watts Problems and Issues Reviews
PSU-1200ATX-12S 1,200 Not 1,200 watts as advertised. Could only deliver 850 watts. Ripple and noise were always high. Mediocre efficiency. jonnyGURU
Please read the power supply reviews for detailed descriptions of problems and issues.


KMEX
Model Watts Problems and Issues Reviews
PG-500 500 Advertised as having 80 Plus Bronze Certification but it does not. Hardware Secrets
PG-580 580 Advertised as having 80 Plus Bronze Certification but it does not. Hardware Secrets
PG-650 650 Advertised as having 80 Plus Bronze Certification but it does not. Hardware Secrets
Please read the power supply reviews for detailed descriptions of problems and issues.


Linkworld
Model Watts Problems and Issues Reviews
ALL MODELS ALL WATTS Died well below full power. Mediocre efficiency, Poor build quality, Poor voltage regulation, Abysmal ripple suppression that could kill anything attached. Useless AC male power cord. jonnyGURU
Please read the power supply reviews for detailed descriptions of problems and issues.


Logisys
Model Watts Problems and Issues Reviews
PS350MA 350 Not 350 watts as advertised. Could only deliver 220 watts. Efficiency, voltage regulation, ripple, and noise suppression all out of spec. Hardware Secrets
PS480X2 480 Not 480 watts as advertised. Could only deliver 290 watts before shutting down. Efficiency, voltage regulation, ripple, and noise suppression all out of spec. Major solder ball issues. Scary thin wall plug cord. Secondary rectifiers woefully undersized. Overclockers
PS600A12 600 Fake 80 Plus logo on box. No PFC circuit. Thin cable wires not to spec. Not 600 watts as advertised. Burned at 375 watts. Efficiency, voltage regulation, ripple, and noise suppression all out of spec. Hardware Secrets
Please read the power supply reviews for detailed descriptions of problems and issues.


Mushkin
Model Watts Problems and Issues Reviews
HP-550 550 Not 550 watts as advertised. Voltages not very stable. Totally failed crossload tests. No PFC. Mediocre efficiency. Lots of ripple, even during middle-load testing. jonnyGURU
Please read the power supply reviews for detailed descriptions of problems and issues.


NorthQ
Model Watts Problems and Issues Reviews
Black Magic Flex 650 Exploded fduring testing. Not 650 watts as advertised. Voltage out of spec. Loud fan. Questionable capacitors. jonnyGURU
Please read the power supply reviews for detailed descriptions of problems and issues.


NZXT
Model Watts Problems and Issues Reviews
Hale82 650 Ripple and noise suppression go out of spec as temperature increases. 3.3V output below minimum allowed at load. Only rated at 35C. Multiple Japanese capcitors advertised but only one present. Hardware Secrets
Please read the power supply reviews for detailed descriptions of problems and issues.


OCZ
Model Watts Problems and Issues Reviews
OCZ-ZT650W 650 Can only deliver 75% of rated power. Failed 45C temperature testing. Hard OCP
OCZ ProXtreme 1,000 Serious temperature issues due to poor design. Hardware Secrets
Please read the power supply reviews for detailed descriptions of problems and issues.


Powork
Model Watts Problems and Issues Reviews
PW-650 650 Not 650 watts as advertised. Exploded during testing. Very old design not suitable for modern pc's. jonnyGURU
Please read the power supply reviews for detailed descriptions of problems and issues.


Raidmax
Model Watts Problems and Issues Reviews
Cobra Power 500 poor voltage regulation, out of specification Transient Load Test results, mediocre DC output quality, poor component selection/build quality, and laughable efficiency. Hard OCP
Please read the power supply reviews for detailed descriptions of problems and issues.


Rasurbo
Model Watts Problems and Issues Reviews
Silent & Power 550 Not 550 watts as advertised. Breaks at 300 watts. No PEG connectors. Very low efficiency at 70%. Hardware Info
Please read the power supply reviews for detailed descriptions of problems and issues.


Real PC Power
Model Watts Problems and Issues Reviews
Silence Blue 550 Not 550 watts as advertised. Exploded during testing. Cut corners in every way possible. Tiny heatsinks, questionable caps, missing OCP, tiny regulators,switching transistors, and transformers. jonnyGURU
Please read the power supply reviews for detailed descriptions of problems and issues.


Rocketfish
Model Watts Problems and Issues Reviews
Rocketfish 700 700 Best Buy House Brand. Rebadged Huntkey Titan 650. Poor Efficiency. Very high noise levels. Only two video power cables. Video cables do not use 6/8 pin connectors. Only 1 year warranty. Overpriced. Hardware Secrets
Please read the power supply reviews for detailed descriptions of problems and issues.


Rosewill
Model Watts Problems and Issues Reviews
Performance 650 Could not deliver 650 watts at room temperature. Noise level on +5VSM above maximum allowed. Not enough SATA power connectors. Hardware Secrets
Please read the power supply reviews for detailed descriptions of problems and issues.


Silverstone
Model Watts Problems and Issues Reviews
Element ST85EF 850 Did not achieve Bronze rating as advertised. Out of spec ripple suppression. Out of spec 12V voltage regulation under load. Failed hot load tests at 46C. jonnyGURU
Please read the power supply reviews for detailed descriptions of problems and issues.


Sinan Power
Model Watts Problems and Issues Reviews
VP-430 430 Not 430 watts as advertised. Could only deliver 215 watts before failing. Did not achieve Bronze rating as advertised. Inferior components. No active power factor correction. AnandTech
Please read the power supply reviews for detailed descriptions of problems and issues.


Sin Tek
Model Watts Problems and Issues Reviews
500XPS 500 Not 500 watts as advertised. Could only deliver 400 watts. No PFC. Crossload issue. Excessive ripple at load. Loud fan. jonnyGURU
Please read the power supply reviews for detailed descriptions of problems and issues.


Spire
Model Watts Problems and Issues Reviews
BlackDragon 400 Efficiency lower than advertised. At full load noise and ripple skyrocketed. Probably a rebadged 350 watt psu. Hardware Secrets
Jewel Black 650 Advertised as being 80 Plus Bronze compliant but it is not. Hardware Secrets
Jewel Black 750 Advertised as being 80 Plus Bronze compliant but it is not. Hardware Secrets
BlackMoon 750 Advertised as having 80 Plus Bronze Efficiency but it does not. Hardware Secrets
BlackMoon XP 600 Advertised as having 80 Plus Bronze Efficiency but it does not. Outdated design. Hardware Secrets, Hardware Heaven
BlackMoon XP 700 Advertised as having 80 Plus Bronze Efficiency but it does not. Hardware Secrets
Please read the power supply reviews for detailed descriptions of problems and issues.


Sunbeam
Model Watts Problems and Issues Reviews
BKS580 580 Not 580 watts. Poor build quality. Poor capacitor quality. Can't do over 200 watts without going out of spec. Poor ripple suppression. Poor Efficiency. Thin gauge wires in cables. jonnyGURU
Please read the power supply reviews for detailed descriptions of problems and issues.


Sun Pro
Model Watts Problems and Issues Reviews
Young Year YA PB 500 Not a 500 watt psu as advertised. Probably only 200 watts. Old design with very cheap components. Also sold under Apevia, Aspire, Levicom, and Leadership brand names. Hardware Secrets
Please read the power supply reviews for detailed descriptions of problems and issues.


Sutai
Model Watts Problems and Issues Reviews
Double Power
P4-500W
500 Not 500 watts. Unit failed at 300 watts. Ripple and noise suppression out of spec. No power switch. Insufficient number of power cables. Ineffective airflow. Tom's Hardware
Double Power
P4-750W
750 Not 750 watts. Unit failed at 350 watts. Ripple and noise suppression out of spec. No power switch. Insufficient number of power cables. Ineffective airflow. Tom's Hardware
Please read the power supply reviews for detailed descriptions of problems and issues.


Sweex
Model Watts Problems and Issues Reviews
PS060 600 Not a 600 watt psu as advertised. Ripple higher than 10% and only comes with one PEG connector. Hardware Info
Please read the power supply reviews for detailed descriptions of problems and issues.


Tagan
Model Watts Problems and Issues Reviews
TurboJet 1,100 Not a 1,100 watt psu as advertised. Could only deliver 768 watts. Hardware Secrets
EasyCon 530 Voltages not stable. Totally failed crossload tests. Poor Cooling. No PFC. Mediocre efficiency. jonnyGURU
Please read the power supply reviews for detailed descriptions of problems and issues.


Techsolo
Model Watts Problems and Issues Reviews
Black Mamba 550 Not 550 watts as advertised. Can only deliver 275 watts. Two main switches exploded at half load. Power efficiency is terrible. No PFC. AnandTech
Please read the power supply reviews for detailed descriptions of problems and issues.


Thermaltake
Model Watts Problems and Issues Reviews
Smart-M 1,000 Ripple well over spec at full load, cold or hot. Hot ripple at mid range loads is absolutely terrible Overclockers
TR2 RX 750 Cannot deliver 750 watts at high temperatures. Ripple and noise are way above maximum allowed. Hardware Secrets
Smart 430 Could not achieve efficiency rating. Ripple and noise were high on the smaller outputs. AnandTech
Purepower 430 NP 430 Not 450 watts as advertised. Could only deliver 350 watts. Old ATX12V 1.03 design. High noise level at 350 watts. Hardware Secrets
Purepower 500 Not 500 watts as advertised. Could only deliver 400 watts for a few seconds. +12 voltage lower than minimum allowed. Could not achieve efficiency rating above 300 watts. Hardware Secrets
Please read the power supply reviews for detailed descriptions of problems and issues.


Tiveco
Model Watts Problems and Issues Reviews
TVPS450 450 Not 450 watts as advertised. Could only draw 310 watts. Energy efficiency rating is false. Not compatible with EPS12V standard - no EPS12V connector. No auto switching circuitry as advertised. No overcurrent/voltage/power protection as advertised. Hardware Secrets
Please read the power supply reviews for detailed descriptions of problems and issues.


Topower
Model Watts Problems and Issues Reviews
TOP-1100P10 1,100 The +5VSB could not deliver correct current and power. Efficiency drops at full load. Two noisy 80mm fans Hardware Secrets
TOP-300SSA 300 Not 300 watts as advertised. Exploded during testing. Very low quality capacitors. Very bad Ripple. jonnyGURU
Please read the power supply reviews for detailed descriptions of problems and issues.


Ultra
Model Watts Problems and Issues Reviews
X4 850 Did not achieve advertised efficiency rating. Marginal DC output quality. Poor Soldering Hard OCP
X4 1050 Did not achieve advertised efficiency rating. Poor Soldering Hard OCP
X4 1,200 Did not achieve advertised efficiency. Poor voltage regulation on the 3.3V and 5V rails. Sloppy build quality. No overtemp shutdown until almost too late. jonnyGURU, Hardware Heaven
Please read the power supply reviews for detailed descriptions of problems and issues.


Unknown Brand
Model Watts Problems and Issues Reviews
LPK-225 420 Not 420 watts. Exploded during 300 watt load test Tom's hardware
Please read the power supply reviews for detailed descriptions of problems and issues.


VisionTek
Model Watts Problems and Issues Reviews
700W 700 Not a 700 watt psu as advertised. Barely managed 347 watts. Old design with extremely poor integration, corner cutting, knockoff/cheap components (Cheng/Chang/Chengx capacitors), and atrocious support. Everything out of spec. Hard OCP
Please read the power supply reviews for detailed descriptions of problems and issues.


Xigmatek
Model Watts Problems and Issues Reviews
NRP-PC502 500 Failed overshoot transient testing. Out of spec high ripple noise on 3.3V rail. Erratic voltage regulation. jonnyGURU
NRP-MC802 800 Poor voltage regulation on all rails. Did not achieve Bronze efficiency at higher loads and temps. jonnyGURU
NRP-MC1002 1,000 Mixed component quality. Transient load tests within specs but not good. Hard OCP
Please read the power supply reviews for detailed descriptions of problems and issues.


Xion
Model Watts Problems and Issues Reviews
PowerReal 700 Old design. Poor voltage regulation. Poor efficiency. No PFC. No fan control switch as advertised. jonnyGURU
Please read the power supply reviews for detailed descriptions of problems and issues.


Zalman
Model Watts Problems and Issues Reviews
ZM450-US 450 Not 450 watts as advertised. Poor voltage regulation. Hard OCP
ZM600-ST 600 Not 600 watts as advertised. Efficiency drops above 360 watts. High noise and ripple levels. Two video card connectors attached to the same cable. Hardware Secrets
ZM850-HP 850 Voltage below minimum allowed on +3.3 volt rail. can't deliver advertised efficiency. High price. Hardware Secrets
Please read the power supply reviews for detailed descriptions of problems and issues.


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Seasonic s12g power supply

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Corsair power supply

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Antec Power supply

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