Ok, so I am building a new gaming rig this summer, and since I only build a new system every 4 years or so, I want this system to last me around that long. Last me, I am describing as, a system that will be able to play most games at a moderate resolution and detail level down the road four years.
ASUS P8P67 LE (REV 3.0) LGA 1155 Intel P67 Sata 6Gb/s USB 3.0 ATX Intel Mobo - $139.99
G. SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM 1600 (PC3 12800) - $59.99
OCZ ModXtream Pro 700Watt Modular Power Supply - $89.99
Antec 300 Steel Series - Black ATX Case ----- $59.99
EVGA 01G-P3-1556-KR GeForce GTX 550 Ti - $129.99
These prices were taken from Newegg on 5/30/11.
My question revolves around power usage. I have an older 500 Watt Antec power supply, 500w, that I am currently using. It has many SATA power hookups, molex hookups, etc. To figure out how much power a system is going to need, do I just add up all the wattages and then see if my power supply can match it? Or is there more to it. If I can eliminiate that $90 for my power supply, it could be used elsewhere like on the 2500k processor instead or something.
You could 'build' your intended build into this http://www.thermaltake.outervision.com/
to give you a rough idea of power needs, give yourself headroom ofc, especially if your overclocking
if your trying to save a little, go for a good non-modular psu over a modular thats maybe not the best choice/value
If you are looking for 4 to 5 years of gaming longevity then start with 8 GB of ram. Also, the GTX 550 Ti is not going to fetch you gaming horsepower for that long. You will eventually need to upgrade it. Grab a Corsair TX 650 V2. Although overpowered for your current rig, it will keep the upgrade options open till your PC lasts.