will my pc get bottlenecked if i use a asus 660ti or asus hd 7850 on my pentium e5700 @3ghz (ddr3 mobo)with pci 2.0 slots
There would be an increase in your FPS but I don't think you can maximize your VGA. If you can upgrade your CPU, then go ahead
Me myself is using a Core 2 Quad core and this being ancient, I think my rig is not fully capable of handling high end VGAs. hope this helps!