New build 6990 + 8130p when it comes out how much power?

[liquidchild]

I am slowly but surely building a new rig, but do not really know how much power i am going to need. I have used a few power supply calculators and they are giving me a huge gap, some say 1200 some say 850? So I'm tired of the time wasting lol I've been looking for a power supply for 3 days now and 9 hours of looking at a screen and not buying is driving me crazy. So I figured I'd ask you all...

my finished rig will include a FX-8130p i will over clock it when it needs to be but june of 2011 is not that date
A ROG motherboard
8mb of ddr3 1866 to 2200 what ever is supported
a raven 3 case with all the fan slots filled
a 1 TB 7200rpm HD
a 64-120 gb SSD
4 to 5 USB powered items
either a 6990 or 2 6970s have not made my mind up yet
1dvdrw
and an aftermarket cpu cooler
some of the PSU ive been looking at include a enermax gold 900w but it says 990 peak
a ST1000
ive also looked at some 1200+w units
Point is i cant make a good decision when the calculators are giving me 350 w differences.
any help is very welcome

 

[Dominaz1]

A 6990 would require arround 300 Wats at its maximum.

Leave another 150 W for the rest of your PC.

And give an extra to be safe and to cover overclocking...
So take a 650 W quality psu, it would be enough to power your PC.

Some options:

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139005

http://www.newegg.com/Product/Product.aspx?Item=N82E16817371044



BUT IF YOU DECIDE TO GO for 2 X 6970, then things change, since 2 of these could require arround 500 W while playing...

So in this case go for a +- 800 W PSU.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139009

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139010

http://www.newegg.com/Product/Product.aspx?Item=N82E16817256059

 

[rolli59]

For the hardware you list the calculators recommending 850watts are the ones that are closer to correct. Here you can see actual measured total system loads with different GPU's http://www.anandtech.com/show/4239/nvidias-geforce-gtx-590-duking-it-out-for-the-single-card-king/16
(The system specs are on page 4 in the review)

 

[Dominaz1]

For the hardware you list the calculators recommending 850watts are the ones that are closer to correct. Here you can see actual measured total system loads with different GPU's http://www.anandtech.com/show/4239/nvidias-geforce-gtx-590-duking-it-out-for-the-single-card-king/16
(The system specs are on page 4 in the review)

I agree with you.

2 Nice 850 W units.


http://www.newegg.com/Product/Product.aspx?Item=N82E16817139009

http://www.newegg.com/Product/Product.aspx?Item=N82E16817256058

 

[liquidchild]

hey thanks a lot guys...one more quick add in, when i do over clock the CPU will i still be ok with the 800 watt or should i just go with a 900 watt to be safe(ive decided on the 6970x2 for the heat issue the 6990 is having). BTW ty for the link rolli59, who in the heck needs a 1200 watt PSU if sli 580s use 620 watts?

 

[liquidchild]

well 850 in furmark but still....1200 watts? it seams like those PSU calculators are trying to rip you off

 

[rolli59]

The one on newegg over rates for sure! Even with an overclock a quality 800 -850 watt should be fine.

 

[Dominaz1]

hey thanks a lot guys...one more quick add in, when i do over clock the CPU will i still be ok with the 800 watt or should i just go with a 900 watt to be safe(ive decided on the 6970x2 for the heat issue the 6990 is having). BTW ty for the link rolli59, who in the heck needs a 1200 watt PSU if sli 580s use 620 watts?

With a 850 W psu you won´t have problems, so don´t worry get a quality 850 W unit.

 

[liquidchild]

Best answer selected by liquidchild.