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ATI 4870 X2 question

Post Date: 2010-03-16
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sbq View Drop Down
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Posts: 60 		  Quote sbq Quote  Post ReplyReply bullet Topic: ATI 4870 X2 question
    Posted: 16 Mar 2010 at 7:04pm
I got this card in my DS rig when I got it Dec 2008.  I had assumed that it would give me better performance than a stock 4870 since it's basically Crossfire on a card, but recently I got some benchmarking tools and it appears the 2nd chip isn't even used.  Do games have to be specifically written to use both chips on this card?
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Posts: 5084 		  Quote justin.kerr Quote  Post ReplyReply bullet Posted: 16 Mar 2010 at 7:18pm
what benchmarking tools?   what CAT are you using?
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Posts: 60 		  Quote sbq Quote  Post ReplyReply bullet Posted: 16 Mar 2010 at 8:10pm
GPUz and MSI Afterburner (with the Kombustor benchmark tool).

what is "CAT"?


Edited by sbq - 16 Mar 2010 at 8:11pm
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Posts: 5084 		  Quote justin.kerr Quote  Post ReplyReply bullet Posted: 16 Mar 2010 at 8:21pm
CAT= ATI Catalyst. sorry
Thos programs are not going to show you any performance from crossfire to non crossfire, you will need either gaming benchmarks or 3d mark benchmarks
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Posts: 60 		  Quote sbq Quote  Post ReplyReply bullet Posted: 16 Mar 2010 at 9:09pm
Both Kombustor and MSI Afterburner see both chips and monitor them independently.  When I run Kombustor it shows both chips, speeds, and temps and I can see that 1 chip is completely idle while the other is handling all the load.  Same with MSI Afterburner when I run games, I can see int he graphs that only 1 of the chips is active, the other is completely idle.
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justin.kerr View Drop Down
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Posts: 5084 		  Quote justin.kerr Quote  Post ReplyReply bullet Posted: 16 Mar 2010 at 9:14pm
what CAT, and what games?
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sbq View Drop Down
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Posts: 60 		  Quote sbq Quote  Post ReplyReply bullet Posted: 16 Mar 2010 at 9:24pm
CAT 10.2 and games like WoW, Civ IV, EVE Online.  I also have 3dmark vantage installed, just ran it and it did use both chips according to MSI afterburner.  I scored a 16,488 on the graphics (ran it as Performance).  going to try WoW and Civ IV again to see how those show up.


edit: and now the multi-gpu kombustor is using both chips.  I spent a day playing around with this stuff and only one was getting used, but now both are.  heat isn't evenly distributed, 1 chip peaked at 68 C, while the otehr peaked at 81 C.  Gonna play with the fan profile on afterburner some more.


Edited by sbq - 16 Mar 2010 at 9:27pm
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justin.kerr View Drop Down
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Posts: 5084 		  Quote justin.kerr Quote  Post ReplyReply bullet Posted: 16 Mar 2010 at 9:28pm
it will matter the game, I doubt wow uses much of either GPU?
 
most GPU intensive games should use close to 100% of both, like this.
 
 
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sbq View Drop Down
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Posts: 60 		  Quote sbq Quote  Post ReplyReply bullet Posted: 16 Mar 2010 at 10:44pm
yeah, just did some daily's in WoW and it used both chips on the GPU, but only to about 25% load.  I don't play shooters so there isn't much I have that will stress it (though I've been thinking about having another go at Fallout 3).

Well, at least it's using both.

one thing I noticed on your screen shot, Afterburner will report the fan speed percentage graph on yours, but it won't on mine (neither does GPUz).  It just stays at 40%.  On GPUz it will also stay at 40%, but it will show the RPM speed so I have an idea of where the fan is at.


Edited by sbq - 16 Mar 2010 at 10:46pm
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