I think the 2460 came out before the 2466.
I have both rev 1.00 and 1.03 motherboards. The manuals are at
http://www.tyan.com/support/html/f_tg_mp.html
All machines have had w2kpro run on them, they are now setup to run seti using freesco.
The manual says the power must have a minimum of 30+A on the +5V power line
I have used 250W and 350W on them, the 250 was right at the 30A mark and I would sometimes get a random reboot.
Since I moved them to 350W's, I haven't had a problem.
All are out in my garage running, producing 10-12 WU's a day, sometimes 14 depending on how the clock falls. However, my wireless AP died while I was on the road and I haven't had time to replace it. It now looks like I need to do some serious thinning of the herd. SO I will do a complete inventory Tuesday and post them all. Thats right, now 4 duallies are up for sale.