ATi Catalyst A.I. function and two HD4870 512MB in CrossfireX

jamesbond007

Diamond Member
Dec 21, 2000
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Recently, I've been playing with my roommate's Killawatt meter and have been troubleshooting some voltage issues that were eventually causing some heat problems for me. With all that figured out, I did some tinkering while I was finishing up the game Crysis for the first time.

I disabled Catalyst A.I. in CCC because I heard it resolved a flashbang issue with CS:Source. It's not a big problem, but I just wanted to see if that fixed it. It did, but I then noticed how low the Killawatt was reading, which was maybe 20W above my current idle consumption.

I did a little testing with Crysis since that obviously stresses my videocards more. Sure enough, with Catalyst A.I. turned on, my power consumption went up roughly 60 watts! Disabling it brought me back down to around 400W, which I thought was pretty interesting. I figured that disabling some 'optimization' features of the cards would have the reverse effect since I would assume it'd have to work the videocards harder.

I should mention that my FPS in Crysis were quite literally cut in half with Catalyst A.I. disabled.

And now you know. :)
 

F1shF4t

Golden Member
Oct 18, 2005
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Originally posted by: SSChevy2001
Disabling CAT AI also disables Crossfire, so now you have one GPU just idling.

QFT

I used to dissable it when I had a single GPU and it solved some rendering issues in games.
But yea dissabling it just turns off crossfire.
 

jamesbond007

Diamond Member
Dec 21, 2000
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Oh really? Well hot damn! I wonder why the driver tips (when you hover over an option) doesn't say that too? I mean, there's a different check box to enable/disable Crossfire by itself, but the Catalyst A.I. just says stuff about driver optimizations.