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What happens when i put in two gpus

Last response: in Graphics & Displays
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June 9, 2011 12:37:34 AM

I have an 6790 and a 4670 both ati and both sapphire
my 4670 isnt CF Ready i'd assume older model.
So what would happen if i put both in a P5K-E mobo

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June 9, 2011 12:40:54 AM

Also could i set it so that my 4670 would just run like surfing and basic things and my 6790 runs my games?
a c 179 U Graphics card
June 9, 2011 12:41:13 AM

They will each behave independently, if you only have one of them hooked up to a monitor the other will sit there in idle mode, it may turn itself off, but there wont be any issues, the only reason you might want to do that is if you needed to run more monitors than the 6790 could handle.
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June 9, 2011 12:45:55 AM

So theres no need for the 4670 considering im using two monitors?
a c 179 U Graphics card
June 9, 2011 12:47:23 AM

Nope, the 4670 will be sitting there doing nothing but consuming a bit of power, the second monitor is a minimal load on the 6790 so even offloading it to the 4670 wouldnt gain you anything but more heat.

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a c 216 U Graphics card
June 9, 2011 12:59:31 AM
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hunter315 said:
Nope, the 4670 will be sitting there doing nothing but consuming a bit of power, the second monitor is a minimal load on the 6790 so even offloading it to the 4670 wouldnt gain you anything but more heat.


Actually, there is a small benefit if you run a 2nd monitor off the other card. The primary card would no longer run at full memory clocks while idle. For a single card to run two monitors requires the memory to operate at full speed, and usually raises idle temps by about 10C or more. With 2 cards, they both can completely run at idle clocks. Of course the benefit is a rather dubious one, and I wouldn't advise doing it, unless you were also using it as a physX card.
a c 179 U Graphics card
June 9, 2011 1:02:29 AM

Ohh, that is a fair point, it doesnt down clock the core clock either(at least my 4850 doesnt), im not sure what my temperature difference is between dual and single monitor at idle but it might be around 10C, but under load it doesnt make much of a difference.
a c 216 U Graphics card
June 9, 2011 1:17:31 AM

hunter315 said:
Ohh, that is a fair point, it doesnt down clock the core clock either(at least my 4850 doesnt), im not sure what my temperature difference is between dual and single monitor at idle but it might be around 10C, but under load it doesnt make much of a difference.


On the 6950, the core becomes about half, but not as low as normal idle clocks. (it'll drop to 450 or 500 depending on 3d clock setting). I know the 470's also had a similar setup, but I don't recall exactly the clocks they used.
July 5, 2011 6:45:26 AM

Best answer selected by StarRavier.
a c 271 U Graphics card
July 5, 2011 7:32:35 PM

This topic has been closed by Mousemonkey
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