Help with i820 chipset

[GeorgeYS]

I bought a second hand SuperMicro PIIISCA (820+MTH) mobo to have some fun. Before buying a sloket to house my PIII-S, I first used a Celeron 333MHz to test it, but it doesn't boot at all.
I understand 820 chipset doesn't support 66MHz FSB, and I've already got the B21 pin masked so that it should be detected as a 100MHz part, but there's still no boot.
Would the mobo probably be defective, or I must use a Pentium processor with 100/133MHz FSB to boot it?

PS: There should be nothing to do with memory, I am using SDRAM with 2 dummy RIMMs in place.

 

[RanDum72]

The Celeron that you have is basically overclocked when you use it at 100mhz FSB, its possible it cannot handle that much OC. I've had 820 boards before just for fun. If your board is compatible, the best Slotket is the Upgradeware Slot-T. You can use Tualatin Celerons, which are faster than the Coppermine ones.

 

[GeorgeYS]

The slocket is what bothers me.
I've checked PowerLeap's compaitbility list of of their Tualatin slocket, SuperMicro PIIISCA is claimed incompatible, while a similar one, Asus' P3C-2000 (Also 820+MTH) is compatible.
What could this mean? Does it mean it will refuse to boot with a Tualatin or just means some minor issues such as can't display proper CPU name?

 

[dexvx]

It worked with my Asus P3C board, which is i820.

 

[GeorgeYS]

So a 820 should support whatever chip capable 100/133MHz FSB, both Celeron and Pentium 2/3?

 

[GeorgeYS]

Finally I bought the slocket, and ran into great troubles too.
The system runs extremely slow as my P3-S 1.26GHz was iinstalled, probably because the L2 cache was not initialized. I've already tried to extract CPUU microcode from BIOS and added that of Tualatin (Both steppings) and it didn't help.
Anyone hellp me?