Hello, I want to buy a new graphic card but I'm not sure whether or not will it fit my computer. I have motherboard ASRock H55M-GE and processor Intel Core i5 661. At the time I have just an intergrated card, which does not come up to my demands anymore, and I'm thinking of buying 'Gigabyte GeForce GT 640, 2 GB GDDR3, PCI-E (GV-N640OC-2GI)' graphic card. Thanks a lot for your help.