14 replies to this topic

[SidhuScorpion]

ATI Radeon HD 4870 X2 CrossFireX (Quadfire) configuration -

Quote

The power supply was actually running 750-800W for a good hour without failing... I couldn't believe it and I have to be honest and say that I tried to push it to it's limit. I gave this power supply the editor's choice back in 2006 and just now pushed it to the point that it shows signs of weakness. It didn't fail or crash the system, but the benchmarks were not being rendered right.I'm so impressed by these PSU's and I had to share this with you guys... 791W on a 620W rated power supply... That's 171 Watts over the rating or 27.6% more!

Source

[WingZero]

Thats pretty impressive @ wt efficiency

[Rockfella]

Awesome! Corsair really under-rate their PSUs.

[Jasku]

SidhuPunjab said:

ATI Radeon HD 4870 X2 CrossFireX (Quadfire) configuration -



Source

i am so glad I got the 750TX, imagine how much extra i can push it...great find siddhu paahji! :hap2:

[sohancool]

This is just awesome man :hap2:

[wingmysoul]

whoa! had read about vx 450 being able to give about 540W, but this is fantastic.
but, why do corsair underrate their psu's?

[panther]

REally? the word at the AMd forum is that 4870 does not overclock well due to it triple rail design... they say better get the TX series and not the HX series.

[SidhuScorpion]

^ nopes, even VX 450W handles 4870/260 fine.

all triple etc r virtual, its single rail PSU, many reviews mentioned it.

[WingZero]

SidhuPunjab said:

^ nopes, even VX 450W handles 4870/260 fine.

all triple etc r virtual, its single rail PSU, many reviews mentioned it.

how much power requirement difference between a 4870 and 4890 sidhu??.can vx450 handle same??

[gforce]

WingZero said:

how much power requirement difference between a 4870 and 4890 sidhu??.can vx450 handle same??

The 4890 consumes less power than the 4870 at idle but more at load.

[WingZero]

^^that much is not of a concern then i guess a vx450 should handle it:). Repped

[Naga]

Where are the CM Xtreme power guys:P?

[4m!7]

the legendary corsair psu's strikeback :)..

[Gannu]

amitmishra12 said:

the legendary crossair psu's strikeback :)..

Dude! CORSAIR not Crosshair/crossair/Cossiar/Cossair and the likes. :P

[Amien]

from the same source :-
"If it's pulling 791W, then assume 80% efficiency, that means 633W. Assuming that Corsair rates their PSU by how much efficient watts it can generate, 791W from the wall doesn't seem too crazy. I have no idea how PSU ratings are like though so take my quick calculations with a grain of salt."

Very very impressive stuff though. Thanks for sharing :)