PSU for OC Core i7 & 2x 5870

[Gartmon]

My question is pretty straight forward. What kind of PSU will I need if I want to overclock a Core i7 and 2 5870's in crossfire? I know very little about PSU's. I tried using some website to calculate how much power I would need, and it gave me 500w total for all my components, but that doesn't include overclocking, and plus it just seems wrong? I much rather get information from a place I trust like this one. I noticed that the enthusiast gamer build on this forum includes a 850w PSU, but I want to see if theres anything else I should know.

 

[jsc]

http://www.tomshardware.com/reviews/radeon-hd-5970,2474-15.html
seems to indicate that a good 750 watt PSU would do, but I would probably use something like a Corsair TX850.

 

[Gartmon]

So according to that I would be getting around 600w of usage at load for the whole system? But why would you suggest 850w? You think when the 6core cpus role around I will need the extra power? Im building this system with the future in mind. I plan on only geting one 5870 for now then upgrading to another one when the prices have fallen lower.

 

[JackNaylorPE]

I tried using some website to calculate how much power I would need, and it gave me 500w total for all my components, but that doesn't include overclocking, and plus it just seems wrong?

http://www.tomshardware.com/reviews/hdd-backup-recovery,2450.html

Make sure to input EVERYthing including external USB, OC voltage and speed, fans ....as I said everything......capacitor aging should be relatively small (10%) for good PSU's, higher for bargain brands. Notch it up a bit of you think you'll keep many years or will beat the hell outta ya system

Take your answer and multiply it by 1.2 to 1.5 depending on how hard you push your system.

If budget allows Antec SG-850, then Corsair HX-850
If you have case that can use it Antec CP-850 is a huge bargain
If budget constraints Antec TP-850 / Corsair TX-850 or 750

 

[Gartmon]

Thanks for the responses, much appreciated.

So will the antec ninehundred two case work with the Antec CP-850?

EDIT: Found out it doesn't work in the 902. So I went with the corsair 850tx and the antec 902. I mean, it can't hurt having the extra power, and I want to keep this system for a long time. Plus it comes with a nice rebate. I actually really needed a case badly,my PSU I have now is super super crappy, it is embarrassing how cheap it was, and I'm about 90% sure it is what is causing my system to crash.

 

[JackNaylorPE]

IIRC the CP's fit the 1200 / 183 / 193.....checking da review, I see Alzheimers hasn't hit me yet

http://www.silentpcreview.com/article971-page7.html