I'm currently looking at purchasing a 4870 or 4890 (haven't quite made my mind up on that one yet), my system is to the left in the specs drop-down. I've OC'ed my E6550 to 2.8 ghz, but I was wondering if this might bottleneck the new card? This is basically an interim upgrade before I go Core i7, but I really don't have the cash for all that now. Also this is mainly to play Empire: Total War all blinged up to the max, as currently I'm pretty much running it on medium at 1650 x 1080 with one or two settings whacked up to max. I do alot of other gaming too but this is the main game I'll be playing for a while. Does anyone have any idea if it's worth the upgrade with my current system or should I hold off for a complete rebuild?