which one is better processor?core 2 duo or core i3 for gaming?is gfx card's performance affected by processor's ability?
Graphics cards can indeed be affected if your CPU is not up to par.
If for instance you tried to pair a GTX 680 with your i3, you'd experience
Severe "bottlenecking" and bottlenecking reduces performance massively.
This would be due to the CPU not being fast enough to cope with the GPU.
Generally speaking, it's important to put together a balanced set of components.