been push this chip under nitrogen, and controlled the temp around -50°C
yup,for this part, im looking for the max fsb and some performance can't do with air,
just need -50c or subzero, even under -120°c, the results won't change.
Rigged
just make it subzero
looking the max fsb with my hardwares, FSB-645mhz is done
after 2~4times testing, max at 648mhz,and freezed at 650mhz
unfortunately, not very stable even 600FSB, crashed couple times above 620~640fsb testing with pi time
so i forgive up above 620fsb, and testing 6x600 pi time, pretty easy, with clock 3.6G sub 13mins
and with sub4G sub12mins, also done with subzero, that's very fast , and just 1:1 bring with ddr2-1140 cas4
1:1 7x571, sub4G super pi 1m time
sub4G ,sub12mins
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