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Source:eggxpert.com

This is an update of the tiered power supply list originally posted on xtremesystems.org a few years ago. We are continually adding to this list and correcting it when new information is found or comes available. If you think that something about this list is incorrect, or something is missing that should be there, feel free to post that information in this thread. When posting suggestions for changes, it would be very helpful if you could link information supporting what you say, or at least cite the sitewhere you think the information can be found. Of course, personal experience with a power supply can be helpful as well, to some extent, so don’t hesitate to post if you have something to add.

Original Phase III tiered PSU list from: http://www.xtremesystems.org/forums/showthread.php?t=108088

As with any guide there may be psu’s that aren’t listed, or you mayhave your own opinions on various units. However you can visit SilentPCReview, PCPer, AnandTech, HardwareSecrets, HardOCP, and jonnyGURU for in-depth psu reviews.

WHICH ONES TO BUY ?

Tier 1 provides the best quality power, great for overclocking and super high-end systems.
Tier 2 offers almost as good power and stability as Tier 1 at comparable wattage levels with lower price/better availability.
Tier T offers the high quality components of Tier 2 with slightly less rail stability due to Topower internals.
Tier3 is ONLY recommended if price difference is present between Tier 3 andTier 2 or due to availability issues with Tier 1/2 PSUs.
Tier 4 is recommended for stock or low power systems if Tier 3’s are more expensive or are not available.
Tier 5 power supplies are NOT RECOMMENDED, but some brands have high/medium quality power supplies in Tiers 2 through 4.

—–x—–x—–x—–x—–x—–x—–x—–

Tier 1 Brands – The Most Powerful And Stable Components On The Market
Antec Signature
Enermax Galaxy
Enermax Revolution
OCZ EliteXStream
PCP&C TurboCool
PCP&C Silencer >610
Sapphire Pure
Seasonic X-Series
Silverstone ZF (Etasis 85/75/56)
Seventeam ST >600 (SSI, V2.91)
Silverstone OP/DA >700W
Silverstone ZM
Ultra X3 >1000W
XFX Black Edition
Zippy/Emacs SSL
Zippy/Emacs GSM
Zippy/Emacs PSL
Zippy/Emacs HG2
Zippy/Emacs HP2

Tier 2 Brands – Top Quality components With Top Notch Stability – For Those With Price/Availability Issues With Tier 1
Antec Neo HE
Antec EarthWatts < 700watts
Antec TruePower Trio
Antec TruePower Quattro
Akasa PowerGreen 80+
CoolMax CTG-750W/850W/1KW
Cooler Master Real Power Pro >800W
Cooler Master Ultimate/UCP
Cooltek CT
Corsair HX
Corsair VX
Corsair TX
Enermax Liberty
Enermax Infiniti
Enermax MODU82+
Enermax PRO82+
Enhance ENP-GH
Fortron (FSP) GLN
Hiper Type-M >650W
Hiper Type-R >650W
iStarUSA PD2
iStarUSA PD3
OCZ GameXStream <1000W (only if manufactured in December 2007 or later)
OCZ StealthXStream (only if manufactured in December 2007 or later)
OCZ Modstream (only if manufactured in December 2007 or later)
OCZ EvoStream
OCZ ProXStream
OCZ Z Series
PCP&C Silencer <610
Seasonic S12
Seasonic M12
Seasonic Energy Plus
SevenTeam ST <600
Silverstone EF
Silverstone OP/DA <700W
Supermicro/AbleCom
Thermaltake Toughpower >600W
Xclio GreatPower
Xclio StablePower
Xigmatek MC
Xigmatek HC
Ultra X3
Ultra X-Pro
Zalman ZM <1000watt

Tier T – High Quality PSUs Made With Topower Internals – Less Rail Stability Compared To Tier 2 But Still Better than Tier 3
ABS-Tagan ITZ/BZ <1000W
Mushkin Enhanced
Tagan U95
Tagan U25
Tagan U15
Tagan U22
OCZ PowerStream
BFG 800W

Tier 3 Brands – High Quality and Stability, Second Only To Tier 2 Brands
Acbel Polycom
AMS Mercury
Akasa PaxPower
Akasa PowerPlus (>500W Models)
Antec Basiq
Antec Phantom
Antec TruePower III
Antec TruePower II
Antec TrueControl II
Antec NeoPower 480W (Old Model)
Athena Power Space Shuttle Series
Be Quiet Dark Power Pro
BFG ES
BFG LS
Channel Well
Cooler Master Real Power Pro <800W
Cooler Master iGreen
Cooler Master Silent Pro
Enermax Maximum Plus
Enermax Noistaker II
Enermax Noisetaker
Enermax Whisper II
Enermax CoolerGiant
Enhance ENS-G
Epower Xscale
Fortron (FSP) GLC
Fortron (FSP) THN
Fortron AX
Fortron HLN
Fortron PFN/PN/PA
Kingwin Lazer
Kingwin Mach 1 (the negative 12v rail may go slightly outside of spec in some loading conditions)
NorthQ
OCZ ModXStream (rated for 40° C)
Rosewill RP 2 (temperature sensitive)
Rosewill Xtreme/RX
Seasonic Super Versatile
Sigma SP
Silverstone F
Sparkle FSP
Spire Rocketeer V/VI
Sunbeam Nuuo
Thermaltake Purepower RX
Thermaltake Toughpower <600W
XG Magnum
X-Spice Kira
Zalman ZM 1000watt

Tier 4 – Not Recommend With Tier 3 In same Price/Wattage Range
Aerocool
Antec Earthwatts >700watts
Asus Atlas
BFG 1000W
Cooler Master eXtreme (subtract 100watts from labeled wattage)
Delta
Enlight
E-Power
Futurepower
Hiper Type-M
HIPRO
Lite-On
Masscool
MGE XG
Mushkin HP
NorthQ 4775-500S/BU
OCZ Modstream (if manufactured before December 2007)
OCZ GameXStream <1000W (if manufactured before December 2007)
OCZ StealthXStream (if manufactured before December 2007)
OCZ GameXStream 1010watt (essentially a 850watt power supply)
Scythe Kamariki
Sigma Shark
Sintek
TTGI/Superflower
Ultra Xfinity
Ultra X2 <700W
Ultra XVS
Xion Real Power PowerReal

Tier 5 – Other than the units listed above for any of these brands, NOT RECOMMENDED
A-TOP Technology
Apevia
APEX (SUPERCASE/ALLIED)
Aspire(Turbo Case)
ATADC
Athena Power
ATRIX
Broadway Com Corp
Coolmax
Deer
Diablotek
Dynapower USA
Dynex
EagleTech
FOXCONN
FSP Everest
HEC Orion
Hiper Type-R
I-Star Computer Co. Ltd
In Win
JPAC COMPUTER
Just PC
Kingwin Inc.
Linkworld Electronics
Logisys Computer
MGE
MSI
NMEDIAPC
Norwood Micro/ CompUSA
NorthQ
NZXT
Okia
Powmax
Q-Tec
Raidmax
Rocketfish
Rosewill
SFC
Shuttle
Skyhawk
Spire Coolers
Star Micro
STARTECH
Thermaltake Purepower NP
Thermaltake TR2
TOPOWER TOP
Ultra X-Connect
Ultra X2 >700watts
Wintech
XION
YoungYear
Zebronics