PreXMystic :
I would honestly say (And I know some will disagree) that IMO you should save up and stick another 950 in there. The performance of two 950's in SLI is comparable to a higher end 970.
If you are planning to sell your 950 anyways, the 960 will offer better performance, but it doesn't justify an entire upgrade for a tiny bit of performance increase.
The problem is my motherboard only allows 1 GPU it only has 1 slot for it.
And i never replaced a motherboard. U got some good tut for it?
I also got an i3 3,5GHZ will this work properly in SLI or will it decrease performance?
Thanks in advance!