psu & 2900 cards

ozzyDe · 4 Aug 2007 at 13:05

what power unit will I need to run 2 2900xt cards crossfire we have a 500watt
unit a the moe but there is a lot stuff running from it.
also we are going over to core 2 dual E6600 conroe.
Any idea as to the best but not to Expensive PSU I should go for or will the 500watt psu do the job, it is a good unit cost about £50+
I just can see it running crossfire 2900xt.

cheers
D

Cyber-Mav · 4 Aug 2007 at 13:06

do you have exact model info on the 500w psu you currently have? take a digicam pic of the label and post on here for more info.

Tom|Nbk · 4 Aug 2007 at 13:15

No chance a 500w will run it. Your going to need at least a good 600w PSU. The Corsair 620w would be a good choice.

ozzyDe · 4 Aug 2007 at 13:16

no I dont have it to hand, its my brother in law's PC and its over his house
but I know it was good quality saying that it is 15 months old if that helps.
I was looking at 700watt but is that to much as they cost a bomb.

D

Cyber-Mav · 4 Aug 2007 at 13:18

corsair 520 will also do the trick, although keep and eye out for the new corsair vx?? line up is it? they do a 450w and 550w both which should be up to the task.

but again which 500w psu do you currently have?

martin9887 · 4 Aug 2007 at 13:20

Atleast a good quality 600watt I would say.

Corsair 620W is a popular choice in PSU's, should be able to handle 2x 2900's I would have thought.

Cyber-Mav · 4 Aug 2007 at 13:22

if you want to keep expenses low try this psu:
http://www.jonnyguru.com/review_details.php?id=125 the 550w version they mention of it sounds like its gonna be cracking value for money.

willhub · 4 Aug 2007 at 13:38

Tom|Nbk said:
No chance a 500w will run it. Your going to need at least a good 600w PSU. The Corsair 620w would be a good choice.

Course it will if it's a good one, I've got overclocked cpu, ram, and 2900XT at 850/975, on a 520W Corsair PSU, and its better than your PSU and your CPU is overclocked higher than mine, and you've got a 2900XT too.

Corsair HX520W will be fine for it.

RavenUK · 4 Aug 2007 at 13:41

willhub said:
Course it will if it's a good one, I've got overclocked cpu, ram, and 2900XT at 850/975, on a 520W Corsair PSU, and its better than your PSU and your CPU is overclocked higher than mine, and you've got a 2900XT too.

Were talking about two 2900's in xfire here..

willhub · 4 Aug 2007 at 13:44

RavenUK said:
Were talking about two 2900's in xfire here..

Oh dear, my bad, in that case, will the 640W Corsair even be good enough especially if the system will be heavily overclocked.

Tom|Nbk · 4 Aug 2007 at 13:44

willhub said:
Course it will if it's a good one, I've got overclocked cpu, ram, and 2900XT at 850/975, on a 520W Corsair PSU, and its better than your PSU and your CPU is overclocked higher than mine, and you've got a 2900XT too.

Corsair HX520W will be fine for it.

Read the thread we are talking about Crossfire 2900's which use around 450w load I doubt even a Corsair 520w will run Crossfire.

willhub · 4 Aug 2007 at 13:45

Tom|Nbk said:
Read the thread we are talking about Crossfire 2900's which use around 450w load I doubt even a Corsair 520w will run Crossfire.

Above post edited....

I did read the thread, just did not notice about xfire..

Tom|Nbk · 4 Aug 2007 at 13:47

willhub said:
Above post edited....

I did read the thread, just did not notice about xfire..

Then you can't have read it properly

willhub · 4 Aug 2007 at 13:48

Tom|Nbk said:
Then you can't have read it properly

Ok whatever I skimmed it, I'm sure you have made mistakes before..

ozzyDe · 4 Aug 2007 at 14:01

yep 2 2900xt cards crossfire on an Asus board there are 4 hard drivers in all
2 DVD burn 1 is lightscribe as usb powered scanner, skype phone usb,
USB game controlls and lots of shiny light in the case also one hell of a heatsink and fan. plus 2 120mm fans and 3 80mm fans with lights. So there is a lot to power-up now. he is using an ATI 800xt 512 old card but still gives some good quality.

I think he's going to need an industrial generator powered buy uranium and anti-matter.

cheers
D

Cyber-Mav · 4 Aug 2007 at 14:03

Tom|Nbk said:
No chance a 500w will run it. Your going to need at least a good 600w PSU. The Corsair 620w would be a good choice.

man your hiper seems to be doing the job fine :confused:

RavenUK · 4 Aug 2007 at 14:09

Cyber-Mav said:
man your hiper seems to be doing the job fine

Were talking about two 2900's in xfire here..

Cyber-Mav · 4 Aug 2007 at 14:13

AAAAAAAAAAAAAAAAHHHHHHHHHHHHHH

i missed the number 2 in the op's post.

lol i was wondering why everyone was handing out recommendations for overkill psus then.

yes for 2 of those cards that 500w psu is not gonna be up to the job.

ozzyDe · 4 Aug 2007 at 20:28

think I will go for a 600 or 650 depends on how much money is left in the pot

Thanks all

D

fornowagain · 4 Aug 2007 at 21:27

ozzyDe said:
think I will go for a 600 or 650 depends on how much money is left in the pot

Thanks all

D

Ignore the overall rating, not all 600/650 are created equal. The figure to look for is the combined 12v wattage. Looking at those specs you need at minimum 45A at 12v, the HX620 by corsair has 50A and would do will do fine.