Originally Posted by iamatechnoob
Hmm 400w is enough? Maybe I'll get 500 in case I'm adding a couple of fans. I don't see 400w around, mostly 500w for sale. And sadly I can't order from newegg, probably visit a local IT mall to get my parts.
I didn't give a budget cause I live out of the states. Am currently in Singapore, and I think the price might differ. My budget is at SGD1000 if it helps! I guess anything not much more expensive ($5-10) than what I listed should be fine !
Fans don't pull enough power to make a difference here.
A good quality-made 400W PSU is enough even if you went with a GTX 680:
With one GTX 680 under full load in their system, their PSU pulled 307W from the wall outlet. Their CPU was idling, so I have to add up to 77W for the i5-3470 under full load. So, with the GTX 680 and the i5-3470 under full load at the same time (which is unrealistic), the PSU would then be pulling 384W from the wall outlet. This means that if the PSU is 90% efficient while pulling 384W from the wall outlet, then the computer is pulling 345W from the PSU. The gaming power draw will be closer to about 275 to 325W. If the PSU is 85% efficient while pulling 384W from the wall outlet, then the computer is pulling 326W from the PSU. This means that the gaming power draw will be closer to about 225-300W. A good quality-made 400W PSU can easily deliver 400W 24/7, so a PSU like that would be the perfect fit - even with a few extra fans because fans don't pull much power at all.
So since you're going to go with the GTX 650 Ti or the GTX 660 (Ti?), your power consumption will be much lower and so therefore a good quality-made 400W PSU would be quite overkill.
For getting help choosing a good PSU, I recommend using this:
When you find out which ones you can get where you live, you can ask here which one(s) would be the best to purchase.