Processor for GTS 450

And I don't think my AMD Athlon 64 x2 4600+ is suitable.

I have MSI PCI-Ex GeForce GTS 450 1024MB GDDR5 on the i7 is fine

IRON_MAN_AMG

Read the article: http://www.overclockers.ru/lab/40538/Vybor_komplektujuschih_dlya_igrovogo_kompjutera_stoimostju_okolo_550._Mart_2011.html

I have that video card, took processor-AMD Athlon II X4 645 3.1 GHz.
http://www.nix.ru/autocatalog/amd/CPU_AMD_ATHLON_X4_645_BOX_ADX645W_3.1_4000_Socket_AM3_105316.html

I'm thinking between Core Quad q9300, and the Phenom II x4 945. which is the best fit??

Phenom II x4 945, of course, faster.

Intel core i3 normal?

IRON_MAN_AMG
Of course a Hairdryer.

Papic
you year seen?how did you even get here?