Problem my motherboard ( P55A GD65 )does not detect my second MSI 6950

Question

i have a problem. I recently bought a MSI 6950 and i loved it so much i bought a second one, but when i plugged it in i could not activate crossfire, so i removed the 11.2 driver and installed 11.1 when that dident work i did the same and installed 11.4.
when that dident work i went to device manager and to my suprise it only detects one of my cards and not both of them.
My motherboard is crossfire ready, so i my power supply ( seasonic 850W ) and i did the following tests.
Put the first card in the first slot and boot and than in the second slot and boot and the same with the second card, every time it worked but when i put them both in and connect them with 2 crossfire bridges ( i even tried connecting just the one ) it doesnt work. ( the card does get power and works thought because both the fans of the cards are spinning.
Some of the updates are that i updated my bios via live update 5 to version 1.5 when it was 1.2 first.
someone suggested in an other forum that:
Quote
did some checking and there is a switch chip to add 8 extra pci-e lanes which aren't nativly active on your motherboard to enable support of 2 high end graph
Specs:
MSI P55A GD65
MSI 6950 2GB
I5 760
Seasonic m12D 850W

Answer 1

Quote from: Svet on 27-March-11, 08:55:42
yes..
try to power up one of them with both combinations
also maybe you disconnected something, either some of the vgas or the memory stick to make such beeps..
so an update i tried what you said, putting them in without crossfire bridge and the powersupply did not beep but i did not see both cards detected in device manager either.
and i tried your second advice to power each of them with both combinations and that worked for 1 card but when i put them both in, it only showed one again