Hi, my problem is that I tried to run a Pentium MMX 233 processor on a Shuttle HOT-541 motherboard without an additional VRM, and to my surprise, the processor runs very slowly (Speedsys ~18) and has issues executing MMX instructions. The processor works fine on another socket 7 motherboard, with Speedsys showing ~178, and it passes the entire MMX module memory test. A P54C 200 processor works correctly on this motherboard. Additionally, the P55C cannot be set to a multiplier higher than 2.5, but I think I can solve this issue. I found information about the need to solder a resistor between 2 pins of the CPU socket on this motherboard. The BIOS is updated and recognizes the processor as MMX. What could be the cause?