Another aspect of the motherboard you might want to investigate
is the maximum amount of ram that can be installed on the
board. Non-Intel based motherboards frequently offer larger
maximum capacities for memory - but, the gotcha is that some
of these non-Intel based boards have flaky AGP slot designs,
so some percentage of boards will keep having video crashes.
So, if you buy a Via, Ali, or SIS based board from that era,
you never know for certain whether the board they ship to you
will have a stable AGP slot. If you decide to go that route,
buy your motherboard locally, and if there is trouble, you
can easily return it for another one.
You can put 1GB of memory unofficially on a 440BX based board
(just shop at Crucial and use their memory selector to get the
correct type of SDRAM memory). On a 440BX based board with four
DIMM slots, you could run 4x256MB at 100MHz memory clock speed,
or you can run 3x256MB at 133MHz memory clock speed. YMMV.
Not all of the 440BX boards can do 133MHz (due to limitations
on the clock generator chip and not the chipset). A frequent
poster in this group runs 440BX based boards at 150MHz, so the
Northbridge itself is capable of great things.
Given what I now know, I'd find a 440BX board, and depending on
what kind of socket it has on it (slot 1 or S370), buy an adapter
to use with the Tualatin. You might even want to look at some
non-Asus boards with 440BX on them, because some of them can be
overclocked quite well. (In the case of Abit, watch out for bad
caps if buying second hand.)
http://homepage.hispeed.ch/rscheidegger/p2b_procupgrade_faq.html
http://www.tipperlinne.com/p2bmod.htm
Also, you should evaluate your purchase in terms of how large
an IDE drive it supports. These three links are in reverse
chronological order (oldest boards are covered by the last link).
If the motherboard doesn't support large disks, you might want to
buy a Promise ATA133 IDE card to plug into your new motherboard.
http://www.asus.it/support/english/techref/48bithdd/index.aspx (modern)
http://www.asuscom.de/support/FAQ/faq076_32gb_ide_hdd.htm (older)
http://web.inter.nl.net/hcc/J.Steunebrink/k6plus.htm (patched BIOS)
HTH,
Paul