Originally Posted by Niric
I see! That's good to hear! Thank you, lehtv!
I realized I made a mistake as well and Sapphire actually says the card requires a 500W PSU not a 750W like I remembered incorrectly.
I am curious how the PSU Watts details work actually. I should probably do some more research on the subject.
I probably wrongfully assumed that the total wattage of a PSU would exceed the wattage consumption of your each of you build components under heavy load as a added total number?
In otherwords, is it actually just a requirement to provide that amount of wattage as overall capable PSU? Hmm, I'm having trouble putting this question into workds. Haha.
Let me try this- The 8120FX needs around 25W, and the 7970 Ghz needs around 500W, as long as it provides 500+W, then im in the clear? Not 250W+500W+other components = 800+W for total wattage required like I was assuming? I hope this doesn't sound like a dumb question. Haha.
Thanks again for you help!
We all have to learn somewhere. The Radeon 7970 GHz has a TDP of (I think) 250W, AMD's faster CPUs have a TDP of 125W.
TDP is Thermal Design Power. Basically, and I'm grossly oversimplifying here, TDP = Maximum power draw. If you don't overclock your components should never consume more power than that. Typical power consumption is usually lower.
Your motherboard and all other components will in all likelihood not consume more than 30w, but lets call it 45W.
So you have: 125W CPU + 250W GPU + 45W System = 420 Watts.
To sum up; this tells us you could get away a brand name PSU of as little as ~425W.
Your Corsair 650W PSU has more than enough power. It even has plenty of power left for you to do overclocking should you desire. Even if you went nuts overclocking and your power figures boiled down to something like 200W CPU, 325W GPU, 60W System (=~585w), you still have more than enough Wattage.