I had to RMA a friend's video card and xfx didn't send the exact card in exchange, so I'm wondering which card would be better as the primary adapter. The card they sent back is a standard edition 9500GT with 512MB vram and 550mhz core clock. The other card on the table is an older 8600GT XXX edition with a faster core clock but only half the onboard vram. Which should I install as the primary card or would it even matter/work? Both cards are around the same performance but I'm not sure what would be better. I'm thinking the 9500GT since it's newer and has the most vram but the 8600GT is a tad faster. I will probably try both configurations but I'd like some input first in the mean time, thanks!