Oliver_16 :
I have a MSI 870 G45 mobo. I also have a GTX 460 768mb gpu at the moment and looking to upgrade to a gtx 960.
Hi - Yes, will work. Has more to do with your mobo having an x16 slot (it does - two), than the CPU.
However, Phenom II x2 is quite weak for gaming and could bottleneck the 960.