2900XT Crossfire Question.

[Dove32]

Hey all,

Just a quick question, can you run a 2900xt 512mb and a 2900xt 1gb in crossfire or do they both need to be either 2 x 512 or 2 x 1gb ?

Thanks

 

[Sinny]

as far as im aware, in crossfire as long as they are the same family you can fun anything in crossfire.

eg, 2900xt + 2600

you cant do 2900 + 1900.

best to be confirmed by someone though.

 

[gurusan]

do you really need 1.5gb of vram?!? what kind of resolutions are you running?

 

[CaNNoN_1981]

I think it would just run off the lower of the 2, ie 512mb

Prob wrong, but i heard someone saying that they had an X1950pro 512mb and a X1950pro 256mb in crossfire and it used the lesser of the 2.

 

[LoadsaMoney]

do you really need 1.5gb of vram?!? what kind of resolutions are you running?

He wont, he'll only have 512mb as it will go by the lowest amount, not worth crossfiring the 1gb and 512mb cards at all.

 

[MofoKilla]

Whats the recommended psu wattage for 2 hd2900xt's in crossfire ?

 

[Dove32]

thanks for the replies guys

so i wont be crossfiring those.

just one other question

so would 1 card of 2900xt 1gb be better than 2 x 512mb cards?

cheers

 

[LoadsaMoney]

No, the 1gb 2900 is just a total waste, its only 2-3fps at a push faster than the 512mb 2900, and 1gb gives no benefit at all as its not needed, either get the 512mb 2900 and save £60+ on those couple of frames, or buy the much faster 8800 GTX for the same price as the 1gb 2900.

 

[Dove32]

ok fair enough cheers man