PSU Tier list-Tier One - The highest quality and most stable PSUs available on the hardware market today. Highly recommended for any situation
Antec
High Current Pro - 1200 watts
High Current Platinum series
Be Quiet Dark power pro P10 (850w and above)
Corsair
AX MK1 / AX MK2/ AXi series (MK1 AX series is also an excellent choice)
AX1500i (MK3 AX platform, Titanium efficiency)
Cooler Master V series / V series 1200w
EVGA
Supernova G2
Supernova P2
Firepower Silencer MK3 1200w
FSP Aurum PT 1200w
Kingwin
Absolute Platinum 550w
Lazer platinum series
LEPA G1600
Seasonic
M12 II 650 / 750 / 850w (Includes EVO series)
Platinum series (Fanless or not)
X series
Silverstone Nightjar 520w Platinum
Super Flower
Golden King series
Golden Silent series 430w
Leadex Gold series
Leadex Platinum series
XFX
Pro series Black Edition
Pro series Black Edition Limited 1000w
Pro series XXX / Semi-modular
XTS Fanless 460w
Tier Two Class A - Excellent quality units, if not, as good as the Tier one class of units. For people who have a limited budget, but still want a reliable unit for the price
Antec
EDGE series (Pretty much the same as the Truepower Classic models, only modular)
Earthwatts / Earthwatts Platinum
High Current Gamer series
Truepower Classic series (Based off Old Seasonic G series platform)
Cooler Master VS series
Corsair HXi Series
Be Quiet
Power zone series 650 850 750 1000
Straight power E9 400w
Straight Power 10
Corsair
GS series (GS600 / GS800)
HX / HX v2 series
RM 450 / 550 / 650w models (Made by Channel Well Technology)
TX / TXM series
Enermax Platimax series (1250 Watts and below)
EVGA Supernova B2 series (may even reach 80+ Silver, according to Jonnyguru)
Firepower
Silencer MK III 400 500 600 750 850
ZX series
High Power / Sirtec Astro GD 1200w (This unit can get very hot, though the Japanese caps are rated at 150°C, but at maximum load)
Lepa G500
NZXT Hale82 Modular (650 and 750 Watt models)
Rosewill
Capstone series
Lightning series
Silent Night 500 Watts
Tachyon series
Seasonic
G series / G series V2
M12-II EVO 520w / 620w
S / M12 II Bronze 430 / 520 / 620w
S12G (Think of 2011 - 2013 Seasonic G series)
Silverpower
SP 460w Fully Modular
SP Semi-modular
Silverstone
SX600-G SFX
Strider Gold Evolution series
Strider Plus 750w 850w 1000w 600w
Super Flower Golden Green / Modular / HX series
Sentey Golden Steel Power 850 Watts
Thermaltake
Toughpower Gold 850M
Toughpower DPS Gold series
Thortech Thunderbolt plus 800 Watts
XFX
Core series / Pro series Non-modular
TS Series 430w / 550w-SEW
XTR series
Tier Two Class B - Lower life span or slightly lower power output than rated. These are still great units, all of which are still within standard ATX specifications
Azza Platinum 750w 1000w
Antec
Basiq series
VP series (350, 450 only)
Be Quiet
SFX Power 2
TFX Power 2
Enermax NaXn 82+ (550 to 750 Watts)
EVGA Supernova NEXB / NEXG 750 Watts
Firepower
Fatal1ty 2012 1000w Gold
ZT series (Sirtec design, a decent one)
Fractal Design
Integra M series
Newton R3 Series
FSP
Aurum Gold
Aurum Xilencer
Kingwin Lazer gold series
Lepa B650 / B850[/color][/b]
NZXT
Hale 82 series (Non-modular, 750w and greater)
Hale 90 V1 / V2 series
Rosewill Fortress Series
Silverstone
Strider Gold / Gold S series
Strider Plus 500w
Thermaltake
Toughpower 1200M, 1350M, 1500M
Toughpower Gold 1200w
Toughpower XT 775M
Toughpower XT Gold series (Really confusing name, since they are rated Platinum)
Toughpower XT Platinum 1275w (Please don't confuse this one with the XT Gold line)
Zalman ZM-HP 850w / 1000w
Tier Three - Meets standard ATX specifications, though closer to the edges than Tier two units. These are still solid units, which still supply stable power to your system, though not ideal for serious overclocking
Be Quiet
Dark power pro (750 Watts and lower)
Pure power L8 / Purepower L8 CM series
Straight power E9 400 Watts
Bitfenix Fury 750w
Cooler master
Elite II 550w (technically a 500w unit, maybe a typo from design department)
G550M
GX II 550 / 750 Watts
i Series 700 Watts
Silent pro M2 / Gold / Platinum series
Corsair
CS series (High inrush current and +12V ripple levels, only on high levels of load)
CX / CXM series
RM 750 850w 1000w models (750w and 850w made by Chicony, Poor capacitors. 1000w model my CWT, Poor ripple suppression and horrific tenperatures)
VS series
Deepcool Quanta series 750w 1000w 1200w
Enermax
naXn ADV 650 Watts
Revolution X't series
Triathlor / Triathlor FC series
EVGA
430w / 500w
500B / 600B
Supernova 750 Watts B1 / G1
Supernova Classified 1500 Watts
FSP
Aurum 92+ 650M
Aurum S 700w
Fractal Design
Integra R2 650 / 750 Watts
Tesla R2
InWin
Commander III
GreenMe series
Kingwin Powerforce 850w
Lepa G900
Rosewill
Hercules 1600 Watts[/color]
Hive series
Silverstone Strider Essential 400w 500w 600w
Thermaltake
Litepower series
London 550w
Xilence Performance A series
Zalman GS / GT Series
Tier Four - Not for overclocking systems or high end gaming rigs. May not even output labeled power and fail standard ATX specifications slightly. May even use cheap components to meet a price
Aerocool
GT Series 500s 700s 1050s
Integrator 600w
Strike-X series 800w 1100w
Templarius Imperator series
E-power units
Firepower Fatal1ty 2013
FSP Raider series
InWin Glacier
LC power
LEPA MX-F1 series (Trigger-happy Overcurrent protection and very poor quality capacitors)
NZXT
Hale82N 650w
Hale82 V2 700w
Thermaltake Smart series[/b]
Zalman US Fanless 400w (HardOCP reports some poor quality issues at such a high price)
Tier Five - Replace immediately. These units are NOT recommended for any system, no matter the purpose. Reference to higher tiered models for a better and potentially money-saving unit
A-TOP technology
Apevia
Apex (SUPERCASE/ALLIED)
Artic / Ace (They're the same company)
Aspire (Turbocase)
ATADC
ATRIX
Broadway Com Corp
CIT
Coolmax
Deer
Diablotek
Dynapower
Dynex
Eagletech
Enlight
Evo labs
EZ-cool
Foxconn
G7
HEC / Compucase Orion
HEDY (should be WAAAYYY lower down than these units. They're that bad)
iStar computer co.
Jeantec
JPac
Just PC
Linkworld electronics
Logisys computer
Macron
MSi (just stick to their GPUs and motherboards)
NMEDIAPC
Norwood Micro/ CompUSA
Okia
Powercool
Powmax
Pulsepower
Q-tec
Raidmax
Rocketfish
SFC
Sharkoon
Shuttle
Skyhawk
Startech
Storm
Sumvision
Tesla
Thermaltake -
BronzeMunich 430w
Purepower NP / RU
TR2 and TR2-RX
Trust (Stick to their peripherals)
Wintech
Winpower
xTreme (Cyberpower PSUs)
Youngbear
Zebronics
Currently un-tiered - Announced PSUs and / or currently awaiting to be reviewed by professionals.
Aerocool
AP / AP Pro series
CS Series (Not to be confused with Corsair's CS Series)
Antec High Current Platinum GRID
Chieftec A-135 series
Club3d CSP Gold 750 / 850w
Cooler Master
B series v2
GX II 450 / 650 Watts
Digital 1200w Titanium efficiency
Cougar
GX V3 series
GXD series
A series
Enermax
DigiFanless
Platimax 1700w
EVGA Supernova T2 1600w
Fractal Design Edison series
InWin Serenity series
LEPA
MaxGold 1000w
MaxPlatinum series
N series
Raidmax Vampire series
Rosewill
ARC series
AIM Digital series
Hive S Series
Photon series
Quark series
Valens series
Silverstone Strider Essential 400w 500w
Super Flower Leadex Titanium 1600w
Thermaltake
Toughpower DPS Platinum
Toughpower Gold 1000M 1500M
Toughpower Grand 1050F 1200F
Toughpower Titanium 1500w
Toughpower XT Gold 1275M (Yes, it is gold, for a Platinum rated line)
TR2 Bronze series
Thortech Platinum Plus
Xigmatek Maverick S series
Zalman GVM series
The above list might help you getting,i'd recommend you to get one from either seasonic or EVGA.