Hi!

So I have a computer called: Nec PC9821 RA43 which has a Celeron 433mhz processor on a MS6905 Ver 1.1 board which works fine.
A guy on a discord said he updated his RA43 with a Pentium III processor successfully.
So I tried putting a 1333 Tualatin processor there instead. But when I power on the computer only the power led powers on and I see the DVD do something.
But the processor FAN does NOT spin and the video out doesn't show the ram count or anything.

I only tried two different jumper settings... Same as the celeron processor, which I later after having read the manual I found made sense it would not work.
And also tried the coppermine 256k setting (short pin 1&2 on J3) with 133mhz setting (all open on J1 and J4)
Here's manual I found: https://kentie.net/article/deskproupgrade/2136452.pdf

I found an old thread on here, which I kind of don't want to resurrect or whatever it's called regarding some kind of mod required to use the Tualatin processor.
Here is the old thread: MS-6905 slotket V2.3 works fine, V2 only at 100MHz and I also found this regarding the issue: https://www.overclockers.com/forums/threads/t … -advice.135714/
and from what I gather, a mod is required on the board MS6905... But I want to know, can I do the same mod on Ver 1.1 board?

So I put back the old celeron processor and reset the jumpers and computer works normally again. I'd really like to use the Pentium 3 processor I acquired tho. However, I can't say for sure the processor is 100% okay or not but seller on ebay showed a picture in windows running the cpu, so I'm guessing the cpu is working, just that I don't know the correct jumper setting and mod for the MS6905 board.

After more information, I think this is the mod required, and it looks pretty insane to me. I'd be better off looking for a MASTER board instead: https://www.oocities.org/_lunchbox/ms6905_tualatin_mod.html

Basically what is best p3 I can put inside the computer and which Slotket board should I get for least modding required?