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Which card runs hotter in a 2-way CrossFire configuration ?

Tags:
  • Crossfire
  • AMD
  • Heat
  • Sapphire
  • Graphics
  • GPUs
  • Configuration
Last response: in Graphics & Displays
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August 6, 2014 2:32:56 PM

I just got a very good deal from a friend for his two (slightly used) R9 290s, the problem is that one of them is Sapphire Tri-X and the other is Sapphire Vapor-X (links below respectively)
http://www.sapphiretech.com/presentation/product/?cid=1...
http://www.sapphiretech.com/presentation/product/?cid=1...

Now for obvious reasons I want to install the Vapor-X in the the slot that gets hotter, now here is my question; in a 2-way CrossFire, is there a primary card?, by that I mean a card that gets used the most and gets the hottest, or are graphical tasks divided equally that both cards heat at the same rate? and if one heats faster then which one?
I will be using this MB: http://www.asus.com/ae-en/Motherboards/SABERTOOTH_990FX...

Also I see that the cards have different memory and GPU core speeds, is that gonna be a problem?

And what about overclocking?, do I have to overclock each of them separately or what's the deal?

More about : card runs hotter crossfire configuration

August 6, 2014 2:36:09 PM

The top card Will be used more often, as some Games can only make use of 1 GPU, but if both are being used, the workload is distributed between the 2, meaning equal heat output
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a c 181 À AMD
August 6, 2014 2:39:22 PM

Heat rises. The top card will be hotter.
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August 6, 2014 2:40:04 PM

top will be hotter as it will suck in the warm air from the bottom one.
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August 6, 2014 3:01:09 PM

Thanks guys, but just to be sure, according to Asus: "When running dual graphics cards, be sure to insert the card in the first and third PCIex16 slot to get the best performance", so by top card you mean the first x16 right?
Also I'll be very thankful if you give me a brief answer to my last 2 questions:
"Also I see that the cards have different memory and GPU core speeds, is that gonna be a problem?

And what about overclocking?, do I have to overclock each of them separately or what's the deal?"
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August 6, 2014 3:03:29 PM

Ahmad Mansour said:
Thanks guys, but just to be sure, according to Asus: "When running dual graphics cards, be sure to insert the card in the first and third PCIex16 slot to get the best performance", so by top card you mean the first x16 right?
Also I'll be very thankful if you give me a brief answer to my last 2 questions:
"Also I see that the cards have different memory and GPU core speeds, is that gonna be a problem?

And what about overclocking?, do I have to overclock each of them separately or what's the deal?"


Whichever card is clocked higher, it will down clock itself to the slower card, making them share the same clock's. When over clocking 'I Think' it will change both cards at once
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August 6, 2014 3:07:42 PM

The speeds shouldnt be a problem and both can be overclocked to the same speed. both can be overclocked seperately as long as you have good air flow the heat flowing into the top card should be to bad.
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