So I got a Hp dc5800 sff with ddr2 4gb ram a 1tb HDD and a core 2 duo e8400 CPU that my parents bought me for school problem is that its not good for gaming so since the on-board GPU is crap i am going to buy a new one and there is my problem the manual says that the mother board has a max tdp of 25 watts but the pci wiki says it can draw a max of 75 watts also since the power supply is about 250 watts i believe so i have a hard time choosing a card i thought a gt 730 and the forms i looked at say it will work but nothing about the gddr5 version so i hope i have given all the info needed and also is the pci on this mother board pci 2.0 or 1.0 or will it not matter?