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NVS 510 only recognizes 2 out of my 4 monitors

Last Modified: 2015-03-06
Well I guess the question title say it all... No matter what I try my newly purchased NVS 510 only recognizes 2 out of my 4 monitors.

The card in installed onto a Brand X Intel motherboard and seems to work just fine except for that fairly annoying issue !

All four monitors are identical and are plugged into the four mDVI of the card via (Nvidia supplied) mDP to DVI adapter. Only the "lower" (when seen from behind) two outputs work (ie if I switch the monitor they will work fine but only two at a time, the ones connected to the lower two ports).

Control panel with 4 monitors attached
This is a Windows 7 / 64 system. All patches up to date. Motherboard Bios and drivers up to date.

Any idea / pointer most welcome. If nothing else confirmation that this setup is supposed to work
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