Will this GPU fit and work with my mobo: ASRock G41C-GS(PCIe 1.1 x16 slot if im correct), CPU is Core 2 Quad Q9550. PSU is 850W. Will there be any bottlenecking?
You should not see any sudden fps drops (bottlenecking) with q9550 and 750ti. However if you get them just OC your processor a tiny bit and that's it. But as I said you most likely won't get them.
There are 750ti models with 6pin connector which you can overclock, just plug 6pin connector from your psu to it. Other 750ti models are powered using motherboard instead of PSU