I am building my first gaming PC and i wanted to know if i am doing things right. My parts
EVGA Ge Force gtx 550 ti
asus z68 lx mobo
Hyper Genesis 2x4 (8gb) ram 1600
Ultra LSP750 750-Watt Power Supply
1 tb hardrive (haven't chosen yet)
i was wondering if it will work. Thank you
The system will work but if you call this a gaming pc then your priorities are slightly off..a GTX 550ti isn't good at running most games on medium settings. You need to get a 500w psu,...only 2x2gb of ram, a cheaper motherboard and invest more in the GPU..preferably a GTX 560 or 6870 at the very least. If you can afford $200-$230 on the GPU then get a GTX 560ti or Amd 6950 1 or 2gb.
The 750w psu isn't needed unless you have 2 video cards...the 8gb ram isn't needed for gaming...4gb does the same thing if you are on a tight budget...the motherboard rarely does anything unless you are truly going to use the features of the higher models. Save the money and focus more on the GPU and CPU (your choice is excellent).
The Ultra LSP 750 is a low end PSU with low efficiency (claims 78% on Tigerdirect). It only has 540W combined on its +12V rails (which a more important indicator of power than the number on the label).