this cheap crap usually doesn't fare well with any Athlon 64 system.
it is not a nforce3/4 incompatibility, it is purely a Athlon64 memory controller compatibility issue (or should i say the memory controller rejects crap)
i had a pair of Geil 256's, the blue heatshield set on newegg with 2.5-4-4-8 timings. unfortunately they wont pass prime95 at 166 or 200mhz with any combination of timings, yes, i tried 3-4-4, still crashy after a few hours. this was on a nforce4 system. i tried them out on my nforce2 system (shuttle sn35?) with same result, except crash after 7 hours. however, if i didn't run them in dual channel mode (what they're for) they were completely stable at 3-4-4.
i tried them on my friends 865 system at 2.5-3-3-12 (recommended 12T for this board by anandtech) and they were completely stable at 166mhz through prime95. i sold them to him