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Need a little help between 2 power supplies!

Forum CPU & Components : Power Supplies, PC Cases & Case Mods - Need a little help between 2 power supplies!

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feroc1ty   10-08-2009 at 11:06:04 PM

Alright guys, looking for a little help, I am wanting to choose between these two power supplies,

http://www.tigerdirect.com/applica [...] etailspecs

http://www.tigerdirect.com/applica [...] CatId=2534

please help, i am going to get an ati hd5850 card, possibly crossfire 2 of them, which one would be better, My rig is an x58 chipset, i7-920 processor, 6x1gb ddr3 1333mhz, 1 hardrive, current gpu is ati 4850 512mb.

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Bronze CPUs badge jsc   10-08-2009 at 11:16:37 PM

Of the two PSU's listed, Corsair.

Reply to jsc
feroc1ty   10-08-2009 at 11:18:19 PM

is there one better than the two at that price range?

Reply to feroc1ty
swifty_morgan   10-08-2009 at 11:36:29 PM

This one is $10 cheaper and has free shipping. I have this one. Only complaint is that the ribbons ( cables ) are a little stiff. Works great.

http://www.newegg.com/Product/Prod [...] 6817139009

Reply to swifty_morgan
era86   10-09-2009 at 12:10:47 AM

corsair easily.. the other has 6 12v rails... WOAH! never seen that many before

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rand_79   10-09-2009 at 12:28:58 AM

6 12 volt rails.. thats like....hrmmm... ROFLCOPTER!!!


lets see I can put a hard drive on this rail... a graphics card on this rail..
whoops I put 2 devices on one rail no wonder my pc wont boot?!!?

LOL..

corsair 1 70AMP rail = win

Reply to rand_79
mrmez   10-09-2009 at 06:09:21 AM

Ive got the 750W single rail corsair, and its pretty damn good.

Ive managed to lower my CPU voltage from my 650W near-no name brand psu, as this one only drops 0.02v under load.

Always go for a brand name PSU. A bad one can die more easily taking pretty much every component with it.

Reply to mrmez
andy5174   10-09-2009 at 09:36:09 AM

600W is sufficient for 2x HD5850 at stock frequency in CF, so a Corsair HX620 or HX750 is more than enough.

HX620 Max Overload with it still being within spec : 746W output @115V outlet

HX750 Max Overload with it still being within spec : 912.9W output @115V outlet

The efficiency is even better with 220V outlet!

Reply to andy5174
Bronze CPUs badge jsc   10-09-2009 at 03:51:56 PM

Yes. Corsairs are pretty conservatively rated. you can pull about 15% - 20% more than rated power across the whole line of PSU's and still stay in spec.

I have a TX750. Anyone else could legitimately call it a 900 watt PSU. And it is rated for full output power at 50 C.

Reply to jsc
mrneil001   10-09-2009 at 07:03:49 PM

I am going to pretty much be doing the same, starting with one 5850 then adding another in the future.

 

Does anyone know if this PSU is sufficent to support 2 5850:

 

COOLER MASTER Silent Pro 600
http://www.newegg.com/Product/Prod [...] 6817171036
Its modular, single rail and has 40 amps

 

At first I was going to get the CORSAIR CMPSU-750TX 750W because it had 60amps, but it is not as silent as the cool master nor is it modular. So its my second choice if the cool master doesnt fit my needs.

 


EDIT: Nevermind.. It wont work for 2.. found an great website with the info about the 5850 power requirements layed out better than AMD explained it.. That Corsair is perfect for 2 card since it has 4 6pin connectors(the +2 just means it can be an 8 connector), has enough amps and watts... :)

 

Just in case someone else needed this info, heres is the web site:
http://www.guru3d.com/article/rade [...] rossfire/9


Message edited by mrneil001 on 10-09-2009 at 09:32:44 PM
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