Shuttle AK31 rev. 3. Fast, stable, somewhat overclockable and cheap. It won't keep up with some of today's newer boards, but in its heydey, it was the best no frills board out there. My opinion of course.
I'm building up a SL6C8 tB1 Celery 1.2 (Q229A358-0411) system that will be dielectric oil submerged/compressor cooled. I'm going to shoot for the magic 2.0 (166FSB) - If I make it I'll reward myself with a 9700pro. The 9700 should overclock like mad as well when submerged in -20C oil.
I've got a line on a 256mb PC166 CL2 module but I don't know if I'll get 512k. It'll just be a non-multitasking gaming rig so it shouldn't matter.
And yes I know I have too much spare time these days.
Support 32 RIMM
Support 4I bank RDRAM
Support Pc 1200 (30 Ns and lower)
memory core AGP voltage
1 GB/S South bridge to northbridge
Intel AGP 8X
Fully adjustable PCI AGP RAM adjusting
big active colling on the nortbridge
So R658 have all this feature except ICH5 and AGP 8X from intel.