I have intel C2d E6750 and gigabyte EP45-UD3P mobo. Is it advisable to upgrade to i7-920 proc and compatible mobo :S Usage - normal with occasional gaming/graphics.
Nope, no need to upgrade. Even if you want some more processoing horse power, just sell out your processor and get an E8200/E8400 ( used will also do ) although quads are not needed.