it is worth to do the upgrade if your games are CPU animals and the upgrade cost is not an issue... pero, gamay ra mana sila ron na need ug faster CPUs... most of the newer titles like BF3 are GPU animals... better get the latest top of the line GPU for the BF3... for sure, the newer game titles kay mo follow sa ani na path..
for the i3 (sandy bridge), dili sila ma bottleneck for a HD7970... pas2x mana sila... but again, if the games are CPU dependent, mas hinay sya ug performance compared to the siblings nya like the sandy bridge i5 and i7...
by the way, the sandy bridge i3-2120 are faster on most games than the 1st gen i5 and i7... including the i7 extreme (some gaming titles)... naa ko'y gi post dri sa other thread from Hardware Canucks na gaming performance review...