Is this PSU good enough for this build?

[Firewood B B]

Hey,

But my question is. Is a 800 wattage power supply enough for CrossFireX HD 7970? Some people say HD 7970 will use 249W at full load. So ~500W for CrossFireX right?
I've tried to find a Power Supply calculator but I couldn't find one on the internet. So I thought. Let's ask the awesome people at Tomshardware - So. Should 800W (Cooler Master Silent Pro Gold 800W, 80 PLUS Gold) be enough for:

CPU: i5 2500K
CPU COOLER: COOLER MASTER Hyper 212 EVO
SSD: Crucial CT128M4SSD2
HDD: Seagate ST1000DM003
GPU: Sapphire Radeon HD7970 3GB (2x)
MOBO: ASRock Z68 Extreme3 Gen3 LGA 1155
RAM: G.Skill 8 GB DDR3-1600 Kit
PSU: Cooler Master Silent Pro Gold 800W

Regards,
Brian

 

[sosofm]

CORSAIR Professional Series Gold AX850 http://www.newegg.com/Product/Product.aspx?Item=N82E16817139015 170$ after rebates and 7 years warranty.

 

[Firewood B B]

CORSAIR Professional Series Gold AX850 http://www.newegg.com/Product/Product.aspx?Item=N82E16817139015 170$ after rebates and 7 years warranty.

Okay, So this one should be good for the 2 HD7970 in Crossfire?
I can also get the: COOLER MASTER Silent Pro Gold Series RSA00-80GAD3-US 1000W ATX 12V v2.3 / EPS 12V v2.92 SLI Ready CrossFire Ready 80 PLUS GOLD Certified Modular Active PFC Power Supply - http://www.newegg.com/Product/Product.aspx?Item=N82E16817171056 for even less money (and it's 80 GOLD too)

 

[mcnumpty23]

the corsair already suggested would be my choice over the coolermaster

or for a little less the corsair hx850

in reviews i read somewhere both corsairs actually continuously supplied over 1000w even though

sold as 850w

 

[obsidian86]

yes the 7970's are very efficient even 750 watts will be enough
take a look at these which are all better deals then the Cm and Ax

http://www.newegg.com/Product/Product.aspx?Item=N82E16817104127

http://www.newegg.com/Product/Product.aspx?Item=N82E16817121076

http://www.newegg.com/Product/Product.aspx?Item=N82E16817256067

http://www.newegg.com/Product/Product.aspx?Item=N82E16817116015

 

[geofelt]

A single 7970 needs only a 500w psu; that includes normal pc components.
http://www.amd.com/us/products/desktop/graphics/7000/7970/Pages/radeon-7970.aspx#/2

A second 7970 will need a max of 75w power for the slot, 75w for the 6 pin connector, and 150w for the 8 pin connector.
That makes a max of 300w additional, it will likely use less.

A 800w psu should be sufficient if it is of good quality.

Why buy coolermaster when you can get a top quality psu for a similar price?

Check out Seasonic, Corsair, Antec, PC P&C, or XFX first.

 

[Firewood B B]

A single 7970 needs only a 500w psu; that includes normal pc components.
http://www.amd.com/us/products/desktop/graphics/7000/7970/Pages/radeon-7970.aspx#/2

A second 7970 will need a max of 75w power for the slot, 75w for the 6 pin connector, and 150w for the 8 pin connector.
That makes a max of 300w additional, it will likely use less.

A 800w psu should be sufficient if it is of good quality.

Why buy coolermaster when you can get a top quality psu for a similar price?

Check out Seasonic, Corsair, Antec, PC P&C, or XFX first.

Yes. I think I'm gonna get the Corsair AX850 instead of the Cooler Master 800W