Don't know how to fix this anymore. Please help.
For my experience there are 3 ways for that:
1. Seems to be your SMOS image was corrupted.
Especially if you use USB pendrive - I had to change all my rigs to HDDs because of that.
It happened after "some reason reboot" of the rig. I had to overwrite the image again.
When one of my pendrives was damaged so that it couldn't be read by any program and PC, I changed it to old IDE HDD, and though that rig could reboot still I never had that "kernel panic" issue ever more. Then I changed all my rigs to HDDs.
In one rig, after using it for months, I found that it would be better to set BIOS RAM settings manually instead of "Auto".
Don't know why, but now it's stable much-much more.
2. One of your card is damaged. Bad issue, but may be...
3. Some settings in BIOS bring some conflict on PCI-e bus. For example: try to swich off unused devices in BIOS (like SATA or USB, Audio and so on).
Hope could help anyway...