Can someone explain these odd power draw results?

[Freddie1980]

Someone in another forum who lives in the US wanted to know what video card to get for his next PC, most people suggested the GTX460 1gb but to mix it up a bit I suggested 2x HD5750's in crossfire because it worked a bit cheaper (don't forget this is in America) and would use around about the same power draw and would give him slightly better performance in a lot of games. Then some said I was talking BS and said the GTX460 draws a lot less juice and showed me these links

5750 crossfire IDLE 237 watts FULL LOAD 401 watts.

1GB GTX 460 ON THE SAME SYSTEM hits 307 watts at full load. That is almost a full 100watts less power consumption.

The only difference between those three systems is the GPU's. Everything else is the same.

Hmm ok that's odd because according to spec sheets as the GTX460 1gb has a 160watts TDP and a HD5750 has a draw of 86 TDP. I know these results are wrong as the Anandtech bench and a review on Bitech confirmed my suspicions. The GTX460 review looks correct I think the problem is in the HD5750 review.

The only difference between the reviews is the motherboard and obviously the driver version but that can't explain away 100 watts. The idle power draw of the HD5750 seemed rather high and the only explanation I could think of was Guru's power meter measure wasn't calibrated but it seemed a bit far fetched. So any ideas or have I missed something obvious?

 

[Orcvader]

From that site,

1. Advertised GeForce GTX 460 TDP = 150W (768MB) 160W (1024MB)
2. System in IDLE = 178W
3. System Wattage with GPU in FULL Stress = 307W
4. Difference (GPU load) = 129 W
5. Add average IDLE wattage ~ 25W
6. Subjective obtained GPU power consumption = ~ 154 Watts

Single GPU 5750

* System in IDLE = 221 Watts
* System with GPU in FULL Stress = 299 Watts
* Difference (GPU load) = 78 Watt

Dual GPU 5750

* System in IDLE = 237 Watts
* System with GPU in FULL Stress = 401
* Difference (GPU load) = 164 Watt

Dare I say they just proved themselves wrong?

 

[cainer]

they are judging CF 5750's V's single 460

 

[RavenXXX2]

Can someone explain these odd power draw results?

Sure can, Guru3d = muppet site.

 

[Freddie1980]

Sure can, Guru3d = muppet site.

That was the other thing I was going to ask if Guru3d was a kosher site.

 

[RavenXXX2]

The guy that runs it never gives a bad review, he's in it for the free hardware and perks of being everyones friend in the tech business.

 

[Freddie1980]

Thanks for your help in getting that cleared up, still that idle draw is very high in the HD5750, very odd.

 

[Gashman]

i think they are balls to be honest, my current setup only draws around 460W and thats including 4870X2 which are reknown for being power hungry.