Originally Posted by Athrophia
I'd also like to mention that he tryed CPU burn and it actually runed for some time and stabilised at 40°C for 5 minutes before the crash, not sure what else I could say, I'll come back to this thread to tell you what he changed and what worked hope it's just the cooler ^^
I'd also like to ask, how do you know what components use how much energy, this is a thing i've always wondered to know which PSU to get for which type of build.
Thanks for your help again =)
For power consumption, I generally go by the video card(s) and the CPU. If there is a plan to have a large amount of hard drives, fans, and a significant water cooling system or some other water cooling system that pulls a respectable amount of power from the PSU, then I take those into consideration as well.
So what I personally do is I look for a professional review of the video card and I see how much power that video card caused their PSU to pull from the wall outlet while the video card is under full load. I mean, that's what they're measuring: the power draw at the wall outlet. The CPU is usually idling in such a test in a professional review, so I add a certain amount like 150W for an i5-3570K overclocked to 5 GHz and under full load. After that, I multiply the total by .9 for 90% efficiency and that's the approximate amount of power that the computer would pull from the PSU. Only, the gaming power draw is usually always about 25-100W less (roughly) since the CPU isn't going to be under an extremely full load in a video game.
So, it's not an exact science, but it usually results in being fairly accurate! It's better than some PSU calculator on the internet.
Naturally, one can reach a point where they can instantly know the approximate power consumption of a system based on what it's in it. Then, a typical system that has just one video card in it is even easier because a good quality-made 400-450W PSU can power such a system very easily - unless it's an overclocked top-of-the-line video card like the 7970. Not factory overclocked, mind you. ;)
Edited by TwoCables - 7/14/13 at 11:30am