Username:
Password:
Remember Me?
   Lost your password?
Search



Manufacturer's data versus real measurements

Power consumption of graphics cards compared

When reviewing a graphics card the power consumption is an important matter. Because of this PCGH has been measuring the effect of graphics cards on the overall power consumption on a full system. Comparing our results with manufacturer's data is quite interesting.
Current graphics cards checked for their power consumption.
 
Current graphics cards checked for their power consumption. [Source: view picture gallery]
On one side we have the theoretical specifications of the manufacturers (TDP and Maximum Board Power), which mostly are valid for the reference design. They depend on the graphics card and therefore don't take the power dissipation of the power supply unit into account.

On the other side we have our measurements that apply to a full PC and therefore contain the power dissipation of the power supply unit. So PCGH records the amount of energy the PC requires and what's on the electricity bill at the end of the month. In our test PC we use an economical AMD processor, an Athlon X2 BE-2350, so that the differences between the graphics cards are visually noticeable and are not overlaid by a high basic load.

As "benchmarks” we use 3DMark 03 and Furmark, to simulate the extreme case for the graphics cards. Sometimes the results differ quite a lot and that is an indication that a single test possible would not be appropriate for simulating the load of 3D games. In Furmark for example the HD 4870 surges ahead, while in 3DMark 03 it takes position below a Geforce 8800 GTX. In 3DMArk 03 on the other hand the 9800 GX2 is leading the field while it is on the fifth place in Furmark only - here only one GPU is working.

If you ask yourself why the HD 4870 X2 isn't on the list: Although we have some theoretical values from AMD, we unfortunately don't have results that are comparable to those of the other cards. We hope to deliver those results in a future article.




--
Author: Thilo Bayer (Sep 15, 2008)






Advertisement

Comments (2)

Read all comments here!
pcghx_Kristoffer Re: Power consumption of graphics cards compared
Administrator
15.09.2008 18:01
Quote: (Originally Posted by Yapa)
I noticed you guys ommited the 7800GTX in the test system results?

Also, possible to do this with SLI/CF configs too?


#1 That’s right. We don’t have results for the 7800 GTX yet, but possibly we can deliver them in a future article. I can’t promise though.

#2 Currently SLI or Crossfire tests are not possible since the motherboard we use doesn't support SLI or Crossfire (actually it has only one PCI-Express slot).
Yapa Re: Power consumption of graphics cards compared
Senior Member
15.09.2008 17:16
Awesome mini article! I'm now coming back daily to see what you guys have come up with. You really do make interesting reviews/articles that are relevant to PC gamers.

I have a 8800GTX with a E63800 at 3ghz, this is running on an Antec 500 SmartPower PSU, its fine. However I'm thinking of retiring the 8800GTX in dec/jan and looking at the GTX280... but I'm not sure if my PSU would handle it...

So now I can see that the GTX280 takes about 70 to 80 more watts, should be ok Obviously this is not an exact figure, but can be used to compare!

I noticed you guys ommited the 7800GTX in the test system results?

Also, possible to do this with SLI/CF configs too?

Yapa

Copyright © 2014 by Computec Media GmbH      About/Imprint  •  Terms/Conditions