Hello!
I've been currently looking forward to upgrade my BIOS version from 12 to 15 in order for the MB to support a CPU upgrade. The problem is that with every higher-than-12 version I get a bluescreen ("DRIVER_IRQL_NOT_LESS_OR_EQUAL") right after the "Starting Windows" message. Everything works fine, update is reported as "successful", but I can't get into the OS. I tried every single one of them and looks like is stuck to 12. The same BIOS flashing procedure was used and version 12 is the only one that actually worked. 🙁
This is a problem, because my actual processor (Core 2 Duo 1.8) is way too slow and when I've replaced it with a (Core 2 Quad Q6600 2.4) I got a message telling me it's not workable, pressed F1 as told, the system booted and at some point it would freeze. And, it happens all the time; sometimes it takes hours, sometimes minutes, but for sure it freezes and I have to restart. Again, this is happening with the Q6600 only. As I've noticed, the message ("CPU not workable") dissapears after upgrading to 14 and higher BIOS versions, but the bluescreen prevents me from entering Windows so I can't really tell if the processor is faulty or it's an incompatibility between the MB and the CPU due to the lower BIOS version (on the official site it says version 14 or higher is required to support it).
Any ideas what could have gone wrong? Thanks in advance! 😀
My specs:
MB: Abit IB9
GPU: nVidia Geforece 9800 Green Edition by Gainward (1GB VRAM and 256-bit)
CPU: Core 2 Duo 1.8 gHz - upgrading to a Core 2 QUad Q6600 2.4 gHZ
RAM: 6 GB
PSU: LC-Power LC5400 400W

I've been currently looking forward to upgrade my BIOS version from 12 to 15 in order for the MB to support a CPU upgrade. The problem is that with every higher-than-12 version I get a bluescreen ("DRIVER_IRQL_NOT_LESS_OR_EQUAL") right after the "Starting Windows" message. Everything works fine, update is reported as "successful", but I can't get into the OS. I tried every single one of them and looks like is stuck to 12. The same BIOS flashing procedure was used and version 12 is the only one that actually worked. 🙁
This is a problem, because my actual processor (Core 2 Duo 1.8) is way too slow and when I've replaced it with a (Core 2 Quad Q6600 2.4) I got a message telling me it's not workable, pressed F1 as told, the system booted and at some point it would freeze. And, it happens all the time; sometimes it takes hours, sometimes minutes, but for sure it freezes and I have to restart. Again, this is happening with the Q6600 only. As I've noticed, the message ("CPU not workable") dissapears after upgrading to 14 and higher BIOS versions, but the bluescreen prevents me from entering Windows so I can't really tell if the processor is faulty or it's an incompatibility between the MB and the CPU due to the lower BIOS version (on the official site it says version 14 or higher is required to support it).

Any ideas what could have gone wrong? Thanks in advance! 😀
My specs:
MB: Abit IB9
GPU: nVidia Geforece 9800 Green Edition by Gainward (1GB VRAM and 256-bit)
CPU: Core 2 Duo 1.8 gHz - upgrading to a Core 2 QUad Q6600 2.4 gHZ
RAM: 6 GB
PSU: LC-Power LC5400 400W