My recollection is that the P266 ran on mobos that required 66 Mhz, 3.3 volt, non-parity, unbuffered SDRAM. That may not be particular to IBM, but it was the case with old desktops that came with Win 95.

>Is it possible that you could elaborate on this one a bit more? I don't
>really know what to do next to persue the ram further, to tell you the
>truth, I've now tried a single 128 MB PC100/16 low density ram module 16Mx64
>non ECC, CAS 3 latency, and as far as I know, this should work if it is a
>ram problem. The RAM is known working ram.
>Help!
>Michele Sayer
>
>
>
>I would persue the RAM further.  I had an older IBM PII-266 that used
>non-standard memory, any other memory would plug in but gave me a similar
>constant beep
>
>

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