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5970 + 5870 Crossfire

Last response: in Graphics & Displays
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September 20, 2010 6:21:20 PM

I looked through the crossfire/SLI FAQ and couldn't find an answer to my question in there. I'm about to pair a 5970 with a 5870. Does it matter which video card is the "main" card, i.e. does it matter which one I connect my monitor to? The reason I ask is because the 5970 doesn't have HDMI out, but the 5870 does. My monitor doesn't have a Display Port input, just HDMI and DVI, but I want to use the monitor's internal speakers. Any help is appreciated. Thanks.

More about : 5970 5870 crossfire

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a b U Graphics card
a b C Monitor
September 20, 2010 6:47:05 PM
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It does not matter which card you use as the primary, you can still use the HDMI port on you 5870 even if it is not the main one.

There also is a dongles that will convert Display Port to HDMI, DVI, or VGA.
a b U Graphics card
a b C Monitor
September 20, 2010 6:48:31 PM


I'm not entirely sure but someone can correct me if I am wrong. Since the HD5870 is technically the stronger clocked GPU, you should put that in the first PCI-e slot. That way, you can also use the HDMI port on it. I honestly do not think it matters.
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a b U Graphics card
September 20, 2010 6:51:24 PM

Which motherboard are you using, it could matter in some cases.
Some x58 boards come
16x 8x only
Which would put the 5970 at 8x 8x
Some x58's are 16x 16x
so it wouldn't matter
it also will not matter if its 8x 8x
September 20, 2010 7:07:36 PM

I'm using an MSI 790FX-GD70, so all 4 PCI-e slots are x16.

Thanks for the quick answers. I really appreciate it.
September 27, 2010 6:07:53 AM

Best answer selected by Loetke.
a c 271 U Graphics card
a b C Monitor
September 27, 2010 7:30:43 AM

This topic has been closed by Mousemonkey
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