Hello folks! Thank you in advance for your help.

I am running this exact 486 motherboard: https://www.ultimateretro.net/en/motherboards/1041

According to the jumper settings, this motherboard supports the Pentium Overdrive 83mhz CPU.
I've recently obtained such a CPU but am experiencing some odd behavior at system boot:

• The system posts properly
• When it counts the system memory, it stops short of counting all of it, by approximately 512kb (there is 64mb total)
• I noticed that when it's counting the memory, it's slower than if it had the 486 DX2 CPU
• After counting the memory and falling slightly short, it notifies me as expected of a memory size mismatch and to press F1 to continue
• Pressing F1 to continue results in a black screen and the system doesn't move past that

I have it set to 66mhz clock speed and 33mhz FSB. There's a CPU type jumper setting and it's set for 486 DX2, which so happens to be the same for the POD CPU (according to https://www.ultimateretro.net/en/motherboards/1041).

Has anyone seen this type of behavior and have anything to suggest?

Thank you!
Tony