upgrading my hp pc

hello all! I have a HP pavilion desktop and I’m looking to do a budget upgrade. My specs are linked here. My general plan was to upgrade the graphics card to something like [SIZE=2][FONT=Verdana]GeForce GTX 560 Ti Twin Frozr II[/FONT][/SIZE], the power supply ~750 watt and the ram up to 8 GB. I have never upgraded before and my specs say I can upgrade to 8gb of ram if I’m running a 64bit OS but I’m running 32bit windows 7, can I still upgrade the ram? For the graphics card my chipset has a pci e X16 but an early version how compatible will it be with a graphics card like the one above?

Any recommendations or advice wold be appreciated.

No you can only go up to 4GB using a 32-bit OS sorry, and that card will work. But you can get cheaper cards with less of an OC, and just OC it yourself.