I have a set of 2x512mb Buffalo Value Dimms based on Winbond CH-5 that make it to 229 @ 2.7v @ 2 3 2 10 on an nforce 2 system and about the same on an A64 never really pumped the voltage on em they're on the shelf now as I went to 2x 1gb
Edit: at relaxed timings they hit 250+ @ 2.85V pretty good for at the time very cheap memory