Using 1GHz T-bird and cheap outpost.com PC2700 DDR ram.
Beta bios 8khi2116 (01/17/02)
Bios settings at most aggresive, Turbo, Cas2, manual 1:1, etc.
Best I can do is 155 (310MHz DDR)x9 or 1395MHz.
With mem set at SPD in Bios, mem will run at 3/4 fsb.
Had no problems running 200x7 (400MHz DDR) or 1400 MHz. (mem at 150MHz, 300MHz DDR).
Always use Cas2 and Turbo settings for mem.
For normal everyday use, (poor cooling) run system at 148x8,
but even at above best speeds it completes 3dm2k1 without problems.