It'll be interesting to see which motherboards
(a) have enough capacitor capacity and for how long they can provide enough current,
(b) have capacitors with a good enough speed (from 0-full current) to prevent a core power brownout,
(c) how warm the tracks get from the current draw
(d) How much current is provided by the MOSFETs (ie are they relying on the powersaving mode and short peaks over their maximum power delivery to be covered by the caps).
(e) number of phases - most AMD motherboards are 3 phase IIRC. Pentiums needed 4 or 5 depending on their current draw.

The reason for Intel's Tom's Hardware Intel failures could be that the current draw from the P4 dual core is way beyond the specification of the motherboard.

I wonder if soldering on larger, faster reacting caps will help prevent brownouts.