ACESHIGH said:
That would be 256MB GTX (not 512MB - but then these cost more also).
Note SLI, due to overhead (even when using 512MB GTX cards) is sometimes slower than when using a single card of the same type. Games where SLI is slower than a single card include Half Life 2, Serious Sam 2 & Fable (there are others).
So the X1900XT is a wise choice.
I have both..Two 7800gtx sli and single xt1900xt-x..
Half-life 2 lost coast =
98fps at 1920x1200 4xaa 8xaf Two 7800gtx in sli (485/1300)
72fps at 1920x1200 4xaa 8xaf xt1900xt-x (690/795)
X3-reunion =
52fps at 1920x1200 4xaa 8xaf Two 7800gtx in sli (485/1300)
54fps at 1920x1200 4xaa 8xaf xt1900xt-x (690/795)
touring cars3 demo
200fps at 1920x1200 4xaa 8xaf Two 7800gtx in sli (485/1300)
135fps at 1600x1200 4xaa 8xaf xt1900xt-x (690/795)
Fear =
50fps at 1920x1200 4xaa 8xaf Two 7800gtx in sli (485/1300)
48fps at 1920x1200 4xaa 8xaf xt1900xt-x (690/795)
Call of Duty 2 = about 5 to 10fps slower on the xt1900xt-x at 1920x1200
12650 3dmark 05 Two 7800gtx in sli (485/1300)
11315 3dmark 05 xt1900xt-x (690/795)