Enough Power?

Xinn

Xinn

Xinn

Soldato
Joined
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Wakefield
I am looking to buy a couple of the 4890's on this week only before it end tomorrow.

I am not sure if my PSU can handle it or not.
Corsair HX 620W Modular PSU

Running:
Gigabyte P35C-DS3R
C2D E8400
8Gb Corsair XMS2 (4x2Gb)
250Gb Seagate Barracuda
8800GTS 512
Sata DVD Drive

I'm hoping to clock the cards up a little (Heard they can do 950?) and maybe the CPU to 3.6 ish. Ofcourse I will need a new board for the 2 cards.

Can the PSU cope with the 2 cards and/or the OC as well.
 
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more than enough. 4890 = 120w load. 120w / 12v = 10 amps. less than an 8800gtx, and those 620w HX are good to power two of those. ~21a load at stock for two 4890's, the 620w is good for 50amps and more

dont use any psu calculators, they are all balls.

http://www.xbitlabs.com/articles/video/display/radeon-hd4890_6.html#sect0 4890 power consumption

http://www.hardocp.com/article.html?art=MTMwMSw0LCxoZW50aHVzaWFzdA== hx620 load testing - test#4 = 45a load on the 12v rail.


id only reconsider if i was running 3 of those cards

wupwup said:
i would go for this

http://www.overclockers.co.uk/showproduct.php?prodid=CA-004-PP&groupid=701&catid=123&subcat=1104

cheaper and better
Click to expand...

i wouldnt. ignoring the fact that he already has a hx620, most reviews out there will point out the pc&c unit isnt quite under a decent load, and its not cool runnign either, reporting something like a 20c increase in exhaust temps which you dont see with other psu's like the corsair the op is already running.
 
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Thanks for the detailed reply james.miller.

Guess I'll stick with this unless I can stretch the budget to a i7 build *counts pennies*
 
james.miller said:
more than enough. 4890 = 120w load. 120w / 12v = 10 amps. less than an 8800gtx, and those 620w HX are good to power two of those. ~21a load at stock for two 4890's, the 620w is good for 50amps and more

dont use any psu calculators, they are all balls.

http://www.xbitlabs.com/articles/video/display/radeon-hd4890_6.html#sect0 4890 power consumption

http://www.hardocp.com/article.html?art=MTMwMSw0LCxoZW50aHVzaWFzdA== hx620 load testing - test#4 = 45a load on the 12v rail.


id only reconsider if i was running 3 of those cards



i wouldnt. ignoring the fact that he already has a hx620, most reviews out there will point out the pc&c unit isnt quite under a decent load, and its not cool runnign either, reporting something like a 20c increase in exhaust temps which you dont see with other psu's like the corsair the op is already running.
Click to expand...

your source seems to be a bit off for the power usage for the 4890

check out this

http://www.tomshardware.com/reviews/radeon-geforce-roundup,2297-18.html
 
I'd say the HX620w would be fine - I only just moved up to an HX850w from an Enermax 500w that was borderline for powering my rig.

Am just future proofing myself a bit though - I doubt you'd have a problem with the 620 :)
 
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