ATI Radeon HD 3870 X2: 2 GPUs 1 Card, A Return to the High End
by Anand Lal Shimpi on January 28, 2008 12:00 AM EST- Posted in
- GPUs
Unreal Tournament 3
We used the built-in vCTF flyby in Unreal Tournament 3, using the -compatscale=5 switch to ensure the highest in-game quality settings were used. We ran each flyby for 90 seconds and are reporting the average frame rates.
There are obvious strengths to having two GPUs and they're very visible here in our UT3 scores, compared to the single-card NVIDIA solutions we're looking at a 50%+ performance advantage. Not bad at all.
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HilbertSpace - Monday, January 28, 2008 - link
When giving the power consumption numbers, what is included with that? Ie. how many fans, DVD drives, HDs, etc?m0mentary - Monday, January 28, 2008 - link
I didn't see an actual noise chart in that review, but from what I understood, the 3870GX2 is louder than an 8800 SLI setup? I wonder if anyone will step in with a decent after market cooler solution. Personally I don't enjoy playing with headphones, so GPU fan noise concerns me.cmdrdredd - Monday, January 28, 2008 - link
then turn up your speakersdrebo - Monday, January 28, 2008 - link
I don't know. It would have been nice to see power consumption for the 8800GT SLI setup as well as noise for all of them.I don't know that I buy that power consumption would scale linearly, so it'd be interesting to see the difference between the 3870 X2 and the 8800GT SLI setup.
Comdrpopnfresh - Monday, January 28, 2008 - link
I'm impressed. Looking at the power consumption figures, and the gains compared to a single 3870, this is pretty good. They got some big performance gains without breaking the bank on power. How would one of these cards overclock though?yehuda - Monday, January 28, 2008 - link
No, I'm not impressed. You guys should check the isolated power consumption of a single-core 3870 card:http://www.xbitlabs.com/articles/video/display/rad...">http://www.xbitlabs.com/articles/video/...lay/rade...
At idle, a single-core card draws just 18.7W (or 23W if you look at it through a 82% efficient power supply). How is it that adding a second core increases idle power draw by 41W?
It would seem as if PowerPlay is broken.
erikejw - Tuesday, January 29, 2008 - link
ATI smokes Nvidia when it comes to idle power draw.Spoelie - Monday, January 28, 2008 - link
GDDR4 consumes less power as GDDR3, given that the speed difference is not that great.FITCamaro - Monday, January 28, 2008 - link
Also you figure the extra hardware on the card itself to link the two GPUs.yehuda - Tuesday, January 29, 2008 - link
Yes, it could be that. Tech Report said the bridge chip eats 10-12 watts.