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PCIe x4 good enough for HD 5770?

Last response: in Graphics & Displays
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June 9, 2011 5:44:38 AM

I've got an unusual system with an x8 and x4 PCIe slot. My HD 5770 is working fine in the x8 slot, but its double width blocks the slot I want to stick a sound card in.

Should I swap my dual slot 5770 for a single slot 5670 or move the 5770 to the PCIe x4 slot and take a hit on bus bandwidth?

Put another way, will an HD 5770 be noticeably throttled by an x4 bus?

More about : pcie good 5770

a c 169 U Graphics card
June 9, 2011 6:09:46 AM

You'll definitely see a notable performance hit by moving from x8 to x4
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June 9, 2011 11:33:48 PM

Thanks.

Lets ask the question a different way. What ATI card would be well matched with a 4x PCIe slot?
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June 10, 2011 1:58:45 AM

To make it easy, every graphics card will see a performance drop from 8x to 4x. If it were 16x to 8x, it wouldn't be as noticeable. Basically, the 5770 will see a drop in performance. Depending on how you require it, it may be more or less noticeable.
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a c 216 U Graphics card
June 11, 2011 8:46:43 PM

Is that a 1.x or 2.x slot? If it's 1.x it'll be more like the x1 card in that comparison.
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a b U Graphics card
June 11, 2011 9:01:54 PM

I would think a 5770 on a 4x slot would still be better than a 5670 on an 8x slot.
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June 21, 2011 2:29:12 AM

Best answer selected by toscrawford.
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