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Crossfire AMD vs Intel

Last response: in Graphics & Displays
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April 25, 2012 7:51:20 AM

Hi, recently I bought 2 6870 Radeon HD dual fan cards and Crossfired them using an intel i5 2500 CPU and ASUS P8P67LE Mobo. I am running 8GB Ram on a 64 bit operating system with 650w Thortec 80+ Gold Power supply.

I was told that AMD have better chipset support for Crossfiring because they dont limit the PCIe slots to x4 in crossfire mode instead of x16 in single GPU mode (not really sure what this means).

Can anyone give me a definitive answer as to whether I need to change to AMD CPU/Mobo to get better results?

More about : crossfire amd intel

a b U Graphics card
a b À AMD
April 25, 2012 7:58:04 AM

You really dont need to change anything.Your PC is great keep it that way!
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a c 291 U Graphics card
April 25, 2012 8:26:52 AM

Actually intel CPUs are the best, way better than AMD. It's the motherboards that limit it 4x, not CPUs. Actually, there are intel motherboard that support x8 speeds. Though I doubt you are getting bottlenecked.
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a c 115 U Graphics card
a b À AMD
April 25, 2012 8:32:38 AM

If you have two GPUs they will both run in 8x on 6/7 series. The reason for this is that the 16 PCI-e lanes for the graphics cards on lga1155 are tied directly to the CPU rather than the PCH like the 4x and 1x slots. Some motherboards add a third slot and configure them in 8/4/4 when 3 cards are used. A single card will always be fed at 16x, two will be fed at 8x and three will be fed at 8/4/4
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a b U Graphics card
April 25, 2012 8:35:04 AM

skeleton68 said:
Hi, recently I bought 2 6870 Radeon HD dual fan cards and Crossfired them using an intel i5 2500 CPU and ASUS P8P67LE Mobo. I am running 8GB Ram on a 64 bit operating system with 650w Thortec 80+ Gold Power supply.

I was told that AMD have better chipset support for Crossfiring because they dont limit the PCIe slots to x4 in crossfire mode instead of x16 in single GPU mode (not really sure what this means).

Can anyone give me a definitive answer as to whether I need to change to AMD CPU/Mobo to get better results?

Crossfiring with 1x PCIe x16 + 1x PCIe x4 are said to give some performance hit. But at mid-range GPU's this should not be too much. At least not worth to have a change of motherboard & processor specially since you already have the ideal gaming processor.

You can try a little experiment yourself by running 1 card vs 2 cards in crossfire & see the corresponding FPS in your favorite games.

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April 25, 2012 11:31:56 AM

Thanks for all your replies. It is great to know as I was worried I had to outlay more cash. Your info has helped a lot.

:) 
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April 25, 2012 11:33:04 AM

Best answer selected by skeleton68.
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