I want to upgrade my graphics card for my small form factor Dell Optiplex 745 Intel Dual Core 2.0. It has 4gb of RAM and Windows XP but I will upgrade shortly to Windows 7 Home Premium. I also have a power supply of 240/300 watts. I want to upgrade the graphics card (a Radeon HD 7750 that doesn't fit the case) to the smaller GTX 750 but not the Ti version cause I think that's bigger. If you could point me a good version from Amazon.co.uk (preferably below 100 quid) that would be awesome!!! Also I want to know if it would fit a small form factor (the thinner PC type). Many thanks in advance!!