Whats Power Supply do i need for this setup????

i am building a knew rig and i am totaly throw by all the diffrent watts what do u think i need for this rig:-

my rig

cpu: i7 920
mobo: rampage 2 extreme
ram: 6gb dominator gt with be 12gb
case: antec 1200
cpu cooler: ProlimaTech Megahalems
hd: 2 x 1tb seagate in raid 0 am going to add another 1tb later
cd: standard dl burner
gpu: xfx 4870 x2 (will eventually be running sli)
theres about 7 120mm fans and 1 200mm fan


so what sort of power supply do you think i will need
at first i looked at 850w corsair tx 0 but sombody said it won't power 2 x 4870 x2

what about 1000w or is that too much

anyones advice would be great

p.s. any recomedations for the rig would also be welcome

Whoever said a Corsair 850w PSU would not be able to power a couple of 4870 x2's was talking out of their air biscuit dispenser, but if you really want an idea of the Corsair ethos take a look at this review for the 750w jobbie.
http://www.hardwaresecrets.com/article/505/9

I read that entire article last night because I bought the PSU off Newegg yesterday for $99 with a $10 rebate. The article pretty much backed up what one Newegg reviewer discovered. Plugged it into his car and it started right up.

A pair of 4870x2s in an otherwise fairly well equipped system will pull somewhere around 800W under heavy load (at least that's what I've measured mine at). An 850 would work, but I'd probably lean towards a 1kw model if you want a fairly high end setup including 4870 quadfire.

Corsair HX1000.

Actually, the 800W is with the efficiency already accounted for. It was pulling around 950 at the wall. Of course, that was at full overclock with both Prime95 and 3dmark Vantage running simultaneously, so it was as close as it would ever come to a maximum load.

Yeah - the pair of 4870x2s is pretty power hungry. It games beautifully though

thanks decided to get an 850w corsair..

It's ripple on 12V+ rail which the max. allowed in ATX12V spec. is 120mW.
The reviewer is just being anal as many of the best high-powered PSU on market now are able to achieve less than 40mV.
Anything 60mV and below should be considered outstanding.

[EDITED]Ripple as is tiny high frequency voltage fluctuation. It's AC being converted to DC then filtered afterall so it won't be a straight line of continous DC voltage. Just in case you didn't understand the above bits.

Thanks guys.

Here it is. In the 750TX folder I made last night of course.

http://www.jonnyguru.com/modules.p [...] y2&reid=73

That's ggod to know. I expect a lot when I install it. I use the 700w Thermaltake toughpower on the system in member configuration. Made by the same company as the 750TX from what I read. That unit has been rock solid for over a year. I paid about $150 for it. Only $99 after rebate for the 750TX, so I mean that is a good deal for me. I guess I could have bought the 750w PCP & C unit for $10 more. I have the PCP & C 610w running in my HTPC for a month or so now. That unit is really quiet and gets ultra high marks. Oh well, I have a nice backup in the 750TX sitting here now. I have a lot of Antec 500/550's running currently. Four I believe. Installed the 550w neo modular in my PII 940 micro recently. A 550w with three 22a 12v rails. But really, the PCP & C 610 was the only heavy duty PSU I had besides this now older 700w TT TP. Good to know the Corsair unit still does the job after a year.

good choice op

good to hear its reliabl