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Why isn\'t my system not booting after installing two more gtx 580 cards

Last response: in Graphics & Displays
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March 1, 2012 3:18:39 AM

After installing two more video cards for three way SLI my system is booting it powers up but nothing else
a c 79 U Graphics card
March 1, 2012 3:28:32 AM

those cards will use a LOT of power. what is your PSU/system specs
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March 1, 2012 3:38:56 AM

1000 watt corsair psu. Rampage III formula motherboard
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March 1, 2012 3:39:40 AM

UNKSOL is right! Those cards probably need 250 watts each!
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March 1, 2012 3:42:07 AM

I'd try disconnecting one of the cards, and see if dual sli will work. if it does, then u have narrowed it down to power, or maybe even a bad card. U may even have to try each card one at a time, to be certain that they all work, etc... good luck!
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March 1, 2012 3:42:50 AM

I took the two out and left the other one in there and it still didn't boot
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March 1, 2012 3:44:14 AM

It was working fine until I put the other two in it
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a c 79 U Graphics card
March 1, 2012 3:52:53 AM

well if you went back to the original card and it still doesn't work we have a very odd situation... and corsair is usually solid.... do you have a PSU tester? (for lack of a better idea)
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Best solution

a c 560 U Graphics card
March 1, 2012 4:14:32 AM

For a system using three GeForce GTX 580 graphics cards in 3-way SLI mode NVIDIA specifies a minimum of a 1200 Watt or greater power supply that has a combined +12 Volt continuous current rating of 92 Amps or greater and that has at least three 6-pin and three 8-pin PCI Express supplementary power connectors.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Total Continuous Amperage Available on the +12V Rail(s) is the most important.

Corsair has only one 1000W power supply unit that has been discontinued. The Corsair Professional Series HX1000W (CMPSU-1000HX), with its combined +12 Volt continuous current rating of 80 Amps and with two 6-pin and four (6+2)-pin PCI Express supplementary power connectors, is grossly insufficient to power your system configuration with three GeForce GTX 580 in 3-way SLI mode.

The only Corsair power supply with sufficent capacity to handle three GeForce GTX 580 in 3-way SLI mode is the Corsair Professional Series Gold AX1200 (CMPSU-1200AX) with its +12 Volt continuous current rating of 100 Amps and six (6+2)-pin PCI Express supplementary power connectors.
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March 1, 2012 10:02:54 AM

Thank for your help So how do I get the system to boot back up. After taking out the other two cards it turns on but no beep I don't have a psu tester
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a c 560 U Graphics card
March 1, 2012 5:04:20 PM

You need to try the "possibly defective" power supply unit in a known working system or you need to try a known working power supply unit in the system you are trying to troubleshoot.

One way or another you need to determine if there is a problem with the Corsair 1000W PSU so that you can have it RMA'ed if it's still under warranty.
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a c 79 U Graphics card
March 2, 2012 1:50:25 AM

the tdp of a 580 is only 250 watts. manufacturer recommendations are rediculous and unless that corsair is faulty or he's running a ton of extra junk it should have been fine. story likely the problem but if it is corsair screwed up
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March 2, 2012 2:22:15 AM

Best answer selected by Terry99.
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March 2, 2012 2:31:33 AM

I think that you are definitely right (ko888). After waiting until the next day my system did boot up I think the PSU might have been over worked from the 580's. Is there a possibilty that the PSU might have been in some type of protection mode so that it could not boot up all the way?
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March 2, 2012 2:40:14 AM

Can you recommend a good PSU That will power my system now and in the future
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a c 560 U Graphics card
March 2, 2012 2:45:23 AM

Terry99 said:
I think that you are definitely right (ko888). After waiting until the next day my system did boot up I think the PSU might have been over worked from the 580's. Is there a possibilty that the PSU might have been in some type of protection mode so that it could not boot up all the way?

It was probably a protection circuit that wasn't initially given enough time to reset itself.
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March 2, 2012 3:04:43 AM

Do you think that I should go with the corsair 1200 or is there a better one out there I don't care so much about the name I just want quality
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a c 560 U Graphics card
March 2, 2012 3:20:13 AM

Terry99 said:
Can you recommend a good PSU That will power my system now and in the future

Antec High Current Pro 1200W (HCP-1200)

Corsair Professional Series Gold AX1200 (CMPSU-1200AX)

ENERMAX SGALAXY EVO 1250W (EGX1250EWT-01)

Seasonic X-SERIES 1250W (SS-1250XM)

SilverStone Strider Series ST1500 (SST-ST1500)

Thermaltake Toughpower 1500W (TP-1500M)

XFX ProSeries 1250W Black Edition Full Modular (Gold) (P1-1250-BEFX)
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