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Old June 5, 2009, 05:00 AM
nckid4u's Avatar
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Join Date: Apr 2009
Location: North Carolina
Posts: 83
Default 780i won't recognize second gts250...

My 780i is acting crazy. I have two gts250s. It won't recognize the second one. I am using the top and bottom slots, leaving the middle one empty) It is not the card because I can switch them and it makes no difference. If I put the stock heatsink and fan back on, the fan runs wide open on the second card. If I put my gts250 in the top slot and my 8800gt in the bottom, it recognizes both cards no problem. It is not the PSU because I had 2 gts250s and an 8800gt running together on my 680i with no problems. I also hooked up a second psu and ran the second 250 off it and no difference. What am I doing wrong or not doing???
Thanks in advance.

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Old June 5, 2009, 07:47 PM
someguyfromhell's Avatar
Join Date: Mar 2009
Location: ...
Posts: 38

My System Specs


Are you using bios P08?
Specs: C2Q Q9550 @ 3.5Ghz, Asus P5Q Deluxe, G.SKILL F2-8500CL5D-4GBPK, Sapphire Radeon 4890, Cooler Master Silent Pro 700w PSU, WD Caviar Black 640GB, Hitachi 2TB HDD, Windows 7 64bit
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Old June 5, 2009, 08:32 PM
Join Date: Jul 2008
Location: Toronto
Posts: 49

Try to put the GTS 250's side by side( PCIe 2.0 port 1 and PCIe 2.0 Port 2). See if it makes a diff. I read somewhere that this motherboard is specific on the port of the videocard and has to be in order. Hope it helps
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Old June 5, 2009, 08:35 PM
Eagle Eye's Avatar
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Join Date: Dec 2007
Location: Kleinburg, ON
Posts: 2,067

My System Specs


Bios Version : P08
BIOS Date : 9/15/2008
Bios File : NF78_P08.bin (Primary Download Link)
Notes : The following was updated in release P08:
  • Improved nTune compatibility
  • Fixed restoring disabled device states & fan speeds after suspend/resume
  • CPU Microcode updates for Penryn CPUs
  • Fixed PCIe compatibility issue
  • Improved Fan Controls
  • Improved Memory Compatibility
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