Graphics card / Wattage and Bottlenecking

xexmi

Reputable
May 28, 2014
10
0
4,510
Hi, currently I'm having trouble deciding on which graphics card to choose for my computer. I know there are several threads about which to choose for them, however most PC's are different in build and I couldn't find one similar to mine.

I have :
AMD Phenom ii x4 975 3.6 GHz
8 GB Ram
AMD Radeon HD 6700 series graphics card
Gigabyte 990FXA-UD3 motherboard
550Watt power supply

I plan on upgrading my graphics card to a GTX 750Ti, it's apparently a very good card and is about £105 - £120 which is perfect. What I am worried about is would my power supply be able to handle it, and also would it be bottlenecked by my CPU? I don't want to spend money on a graphics card that doesn't work with my system properly. If I cannot run a GTX 750Ti, could anybody suggest an equal or better graphics card that would around the same price range? I generally want to play Arma 2 / Arma 3 on it.

Thank you for reading, hope you can help.