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Psu good enough for SLI?

Forum CPU & Components : Power Supplies, PC Cases & Case Mods - Psu good enough for SLI?

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goleafsguy   06-08-2009 at 01:14:58 AM

Hey guys, this is my first post and I joined specifically to ask this question. Would the psu that I have already http://www.newegg.com/Product/Prod [...] 6817171014, would I be able to run two 9800gtxs in SLI? I was told that it did not have the right power connectors but I wanted a second opinion.


Message edited by goleafsguy on 06-08-2009 at 01:16:34 AM
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mousemonkey   06-08-2009 at 01:22:21 AM

I reckon you will be ok, you may have to use molex to 6 pin adapters but thats not a major issue. Power and wattage should be OK.

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theAnimal   06-08-2009 at 02:16:37 AM

I don't think you'll have enough power, only 18A per 12V rail.

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mousemonkey   06-08-2009 at 04:23:49 AM

theAnimal wrote :

I don't think you'll have enough power, only 18A per 12V rail.


My friend is running a pair of 8800GT's on one of those and has been for the last year or so with zero problems.
http://www.anandtech.com/printarticle.aspx?i=3413

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theAnimal   06-09-2009 at 12:08:15 AM

mousemonkey wrote :

My friend is running a pair of 8800GT's on one of those and has been for the last year or so with zero problems.
http://www.anandtech.com/printarticle.aspx?i=3413



According to that chart, 9800GTX is 10A at load. My math says that 2x10 > 18, and that's not taking drives into account.

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------------------------------ *How To Ask For New Build Advice*
HAF 922 | HX750
Rampage2Gene | i7 920 D0 | 6GB Gold 1600 | Hyper 212+
Caviar Black 640GB | HD3870
 Reply to theAnimal
mindless728   06-09-2009 at 12:17:19 AM

hopefully he could put one on one rail and the other on the other rail (it has 2x18A rails)

Reply to mindless728
AKM880   06-09-2009 at 01:34:45 AM

IMO it would just be safer if he upgraded his PSU too. CM isn't a good brand for PSUs

Reply to AKM880
goleafsguy   06-09-2009 at 04:02:52 AM

theAnimal wrote :

According to that chart, 9800GTX is 10A at load. My math says that 2x10 > 18, and that's not taking drives into account.



What about the second rail? Couldnt I use that?

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Reply to goleafsguy
goleafsguy   06-09-2009 at 04:53:27 AM

Evga only recommends 30a total on the 12v rails and from what I see I have 36(2x18) so i'm thinking I should be alright...

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Reply to goleafsguy
theAnimal   06-09-2009 at 05:25:01 AM

goleafsguy wrote :

Evga only recommends 30a total on the 12v rails and from what I see I have 36(2x18) so i'm thinking I should be alright...



The rails are generally not additive.

------------------------------ *How To Ask For New Build Advice*
HAF 922 | HX750
Rampage2Gene | i7 920 D0 | 6GB Gold 1600 | Hyper 212+
Caviar Black 640GB | HD3870
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theAnimal   06-09-2009 at 05:26:06 AM

goleafsguy wrote :

What about the second rail? Couldnt I use that?



No. The PCIe and Molex should all be on one rail if there are only 2.

------------------------------ *How To Ask For New Build Advice*
HAF 922 | HX750
Rampage2Gene | i7 920 D0 | 6GB Gold 1600 | Hyper 212+
Caviar Black 640GB | HD3870
 Reply to theAnimal
goleafsguy   06-09-2009 at 05:58:37 AM

How exactly can I find out if they are seperate? I shut off the power and checked inside but I couldnt really figure anything out from it.

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