I currently use an Intel Core 2 Duo e8400 at stock speed, 4 gigs of Gskill ram, EVGA Mobo and 2 EVGA Nvidia Gtx 260 216 Superclocked editions in SLI. I was wondering if the processor is good enough to handle the 2 cards? I am unable to run WoW at max settings which I figured I would be able to with those cards. It's worth noting that I'm playing on a Hanns G 28" monitor at 1920x1200. What do you think? I don't really want to spend a whole lot on a new i5 or i7 and have to buy a new mobo and ram too. Should I upgrade to a Quad maybe?
The 260 is basically equal to the 4870, keep this in mind for what i'm about to tell you.
I had an E8400 & ATI 4870 running WOW at full settings (except for the shaders, i had those @ half) all on a 22 inch monitor running 1650 x 1050. I tried to crossfire in another 4870 and i actually lost FPS. In otherwords, SLI or crossfire & SLI are not supported in WOW, so one card is your only option.
If you overclock to 4 gigahurts, which you should be able to do depending on your ram speed, then you will not *notice* a bottleneck. That being said whether there actually is a bottleneck or not is up to you if you want to be a cpu-tuner lol. You should be fine though.