Upgrade PC

Good time of day. Does it make sense to Grady for the old man? All this config: core 2 duo e8400 at 3.6 ghz(overclocked, cooler-cooler master v6), msi p-43 neo, nvidia gtx 650 1gb, 4gb ram ddr2, 1024x1280.

I want to do this th: percent change to core 2 quad q9550, overclock it to 3.4, above, mother does not, the cooler has normal. RAM 4 raise to 6 by replacing 2 laths on 1GB to 2 2GB. The upgrade price ~3500. On the new platform go short of money. What will be the performance increase in games?