Which PSU should you buy?

Perkam from Xtreme Systems has compiled another list of the best power supplies you can get. The list features seven different tiers and this time nine power supply models made it to the first tier. This means these units use the most powerful and stable components on the market and will handle a 4GHz Conroe or 3GHz AMD processor along with an overclocked Quad CrossFire or SLI setup with ease:

Enermax Galaxy

PCP&C TurboCool

PCP&C Silencer >610

Zippy/Emacs SSL

Zippy/Emacs GSM

Zippy/Emacs PSL

Silverstone ZF (Etasis 85/75/56)

Seventeam ST >600 (SSI, V2.91)

Silverstone OP/DA >700W

Next is Tier Z, these models are still great but are a bit less powerful than Tier 1 Zippy units:

Zippy/Emacs HG2

Zippy/Emacs HP2

Tier 2 models are almost as powerful and stable as Tier 2 but have lower price and/or better availability:

Antec Neo HE

Akasa PowerGreen 80+

CoolMax CTG-750W/850W/1KW

Cooltek CT

Corsair HX

Enermax Liberty

Enermax Infiniti

Enhance ENP-GH

Fortron (FSP) GLN

Hiper Type-M >650W

Hiper Type-R >650W

iStarUSA PD2

iStarUSA PD3

OCZ GameXStream

OCZ EvoStream

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

Zalman ZM

Ultra X3

Ultra X-Pro

For the Tier T, Tier 3, Tier 4 and Tier 5 list you should check out XtremeSystems.