2 video cards = boots fine. 3 video cards = DOES NOT BOOT; hangs at POST

[rlarson]

Here are my specs.

-MSI X58 Pro-E Motherboard
-Intel Core i7-920 2.66Ghz 8M LGA1366 CPU
-Corsair 4096MB PC12800 DDR3 1600MHz (2x2048MB)
-(3) XFX GeForce 9500 GT 1GB PCIe
-Seagate 250GB Serial ATA w/NCQ 7200/8MB/SATA-3G

The 3 video cards are not in SLI. The system boots fine when I have two of the video cards in, but when I add the third card in, it hangs at bootup at the POST screen. Any help would be appreciated.

I'm building this for a friend and need it completed quickly so I need help ASAP.

Thank you

 

[Shadow703793]

List PSU. Could be your PSUs too weak.

 

[rlarson]

Sorry. Forgot that. :/

Coolmax RM-850B 850W Active PF Power Supply

 

[thuan]

Is there any reason you want to run 3 9500GT card, for 6 display output? If it's for performance 3 of that should give you a little less performance than a 9800GT. IOW that setup is ridiculous.

 

[rlarson]

This was requested from my friend for me to build. It's not a gaming rig. Wanted to display 3 monitors on 3 separate video cards.

 

[rlarson]

This was requested from my friend for me to build. It's not a gaming rig. Wanted to display 3 monitors on 3 separate video cards.