Are two crossfire bridges necessary

I have two Gigabyte HD4850's on a P5Q pro. The manual says 2 bridges are necessary but some fora sayit isn't. Can anyone clear this out?

What's the benefit you get from two bridges over having only one?

Bram Vanroy

Posted 2012-04-08T20:51:29.360

Reputation: 1 486

Answers

Use two bridges assure more stability. But the real meaning of the second crossfire is to add a third card.

Also provides more stability in benchmarks (second link)

Refs:

Sein Oxygen

Posted 2012-04-08T20:51:29.360

Reputation: 140

1Can you add a reference for this? Is there some official source that has this information? – nhinkle – 2012-04-08T21:26:32.607

There, I can't add more references because of the limited reputation. – Sein Oxygen – 2012-04-08T22:45:20.387

Thanks @SeinOxygen for adding more info! You'll get the ability to add more links soon. – nhinkle – 2012-04-08T22:47:13.723

Intel chipset + HD 4850s + 1 crossfire bridge = yes to crossfire (some of the earlier HD xxxx require 2).
Nvidia chipset = crossfire not possible.
AMD chipset = crossfireX (no bridge needed depends on chipset & GPU) or crossfire with a bridge is a yes.
890gx,890fx, 990x or 990fx = crossfire faster and the 990s will SLI too.

Last but not least, there is asymetrical crossfire with an AMD APU (Llano) and specific GPUs.

warpuck

Posted 2012-04-08T20:51:29.360

Reputation: 1