5970, I7920 OC, PSU requirements

[leefost]

Hey there, I'm building a system with an XFX 5970 and an I7 920 @4ghz, 12gb ddr3. Do you guys think an 850w PSU would suffice? needless to say I would be looking to overclock the card.

 

[clement4413]

A HD 5970 proximately consumes 450 Watts knowing that you o/c your I7 920 + 12 GB DDR3. I advise you SeaSonic X750 Gold.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817151087&cm_re=seasonic_gold-_-17-151-087-_-Product

 

[leefost]

Ok thanks, I take it the 450w is with OC? I have heard that stock power draw is limited to just under 300w which allows massive OC

 

[clement4413]

It's just the card who consumes 450 watts. if you add CPU with the GPU in load you'll proximately reach 550 watts or 600 watts given that you'll o/c the CPU + GPU. SeaSonic X750 Gold 750 watts will suffices in addition she has gold medals label (90% efficiency)

 

[JohnnyLucky]

Here are the official power requirements for the brand new ATI Radeon™ HD 5970 video card.


ATI Radeon™ HD5970 System Requirements:

PCI Express® based PC is required with one X16 lane graphics slot available on the motherboard

650 Watt or greater power supply with one 75 watt, 6-pin and one 150 watt, 8-pin PCI Express® power connectors

850 Watt power supply with two 75 watt 6-pin, and two 150 watt, 8-pin, PCI Express connectors for ATI CrossFireX™ technology in dual mode


The power supply recommendations are for an entire pc system.

Corsair and Seasonic are two of the brands that have a reputation for high quality power supplies that consistently earn high marks in technical reviews. They are reliable, stable, and come with a 5 year warranty. Some of the newer models come with a 7 year warranty. Lately we've been seeing a few other brands offering some high quality units.

 

[theholylancer]

yeah, also how many disk drives are you running off this thing?

if you want lots, or even quad fire, grab a corsair HX 1000 w and that will last ya through multiple builds

 

[leefost]

I should have put full specs sorry. XFX 5970 and an I7 920 @4ghz, 12gb ddr3, lg bluray r/w, dvd r/w, xonar dx soundcard and a 1 tb hdd.
I guess a Thermaltake 850w psu should be enough even with OC? but should I decide to quadfire I would need a 1000w?
Thanks

 

[theholylancer]

if you want to quadfire, 1000w and above is needed, esp with 5970s.

I would suggest that since you are buying high end parts now, go with a HX 1000 or a toughpower 1200w or something like that, as you will want room to grow and I hope you are getting something like a HAF 932 or antec 1200 to house all of this.

in this current setup, the 850w is more than enough, and should even allow for a few more hdds and what nots

 

[leefost]

Thats great thanks, I have a spare 850 from an older build and didn't want to shell out for a new one unless I really needed to. I was thinking of going for the cosmos s sport, been checking out reviews on youtube and it looks like a really hassle free spacious case.

 

[theholylancer]

yap well if you have one already then use it first, and when you quadfire simply grab a better one then, psu prices don't really fluctuate like gpu or cpu prices on the good brands (save xmas and what nots) and so there isn't a rush for it


the cosmos s sport is seems to be a fine case and should do you well, although i still favorite the HAF 932 my self since it has 3x 230 mm fans for maximum airflow, but the cosmos do look sleeker and with it's 150 cfm side fan it can't be that much worse off for gfx cooling than the 932