So, I have this Lucky Star 5I-VX1F board and an Intel Pentium MMX @ 166Mhz and I was wondering if the two actually fit together. I can find two references/manuals for this board and [1] does mention MMX support and [2] doesn't.

Furthermore, when I look at reference [2] there is a section "CPU TYPE SELECTOR" (big table) and for 166 there are two entries:

P54C 166 3.3V
P55C 166 2.8/3.3V

Notice the P54C and P55C. Which one to go by?

So, basically, how do I know if I have a P54C or P55C?

Thanks!

[1] https://stason.org/TULARC/pc/motherboards/L/L … um-5I-VX1F.html
[2] http://www.elhvb.com/mboards/luckystar/manual … 1f/5ivx1fjp.pdf