I have done some more tweaking on my A8R w/ opteron 165. I have found my best combination by lowering the multiplier to 8.5.
300x8.5 (2550) 1.4v
G.Skill 2x1GB NS 2.5-3-3-6 1T 2.7v
Memory is running at 196MHz (FSB is set to 133. With a divider of 13)
stock HSF (copper 4-pipe)
32/48...
This configuration ran prime95 short fft for 10 hours. The stock HSF seems to have reached its limit. The load temp is 54-55. I once saw 57 briefly in the early going.
I have now set memory timings to 2.5-3-3-6 1T and it completes superPi 16M faster than ever. I'll do a longer test tonight...
OK. I've gone a few rounds with the A8R with better success this time.
1) I backed the multiplier down to 5x and set the memory timing to 3-3-3-8 2T and set the divider to 133, and raised memory voltage to 2.8
2) I increased the FSB up to 290 (in increments of 10) without a problem. Couldn't...
Like you, I have an A8R-MVP (0402) w/ opteron 165 CCBWE 0550UPMW. I am running into the same problem between 260 and 270 FSB. I am currently running stable at 2340 (9x260) with vcore set to 1.35 and showing 1.38 on the monitor. I'm using the stock HSF 47/32 (load/idle). Memory is PC3200...
new to this forum.
I received an opteron 165 PIB today. CCBWE 0550 UPMW.
Haven't experimented yet. I should have some results by the end of the weekend.
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