Amazing Opty 1.65

[tornadog]

After much juggling and tantrums from my MSI mboard, I got my opty 165 to 2840 Mhz at stock voltage, using the stock cooler.

Heres things that had me stumped;

No matter the multiplier, I couldnt go above 260HTT at 3x HT
I couldnt get to dividers, 3:4 and 3:5 no matter what

finally lowered HT to 2.5x, Divider to 1:2, multiplier to 8.5x
HTT is at 355

 

[SlowSpyder]

My 165 does 2.7 easily. But, as soon as I push the HTT over 300 (my old single core had no problem with the HTT @ 320) I can't even boot. Also, with both my Opty 165 and 3000+ my memory only will work at a DDR200 divider, anything above that and I can't boot. Finicky chips I guess.

 

[tornadog]

so its not the motherboard then, its the cpu???

 

[Noubourne]

Well it has the memory controller on it, so when you muck with the clocks, you're mucking with the memory controller. Some of the controllers have a higher tolerance than others, like other aspects of the chip.

My 165 won't do some dividers either. My Venice 3000 used to not do DIFFERENT dividers. Same mobo and RAM. It helps to have flexible RAM in case the chip gets finicky about a specific speed. Mine goes up to DDR600 with the right timings, but I've actually found that the CPU is more stable with looser timings than the RAM is capable of (stable in MemTest 86 at tight timings, but won't pass OS stability testing without looser timings).

CCBBE is a great stepping as many will attest to.

What benches did you use to test stability? I am often wary of clockspeeds for people who post their apparently successful overclocks without any indication of what was used to test stability. Just about anyone can boot a CCBBE into Windows at 2.8Ghz (hell, I can do it over 3.0Ghz) and get a CPU-Z screen of some ridiculous overclock. Far fewer are 10+/24hr Prime stable and 3d stable. Suicide screens are meaningless imo.

 

[tornadog]

I ran OCCT for 12 hours without crash. memtest86 for my ram for 5 hrs, since my ram was well within its stock speeds anyway, 3dmark06, played company of heroes for 4 hrs straight at max settings, 1280 x 1024; dont know if u heard abt the encode360 software which converts xvid movies to hidef wmvs for streaming to the xbox 360 but I ran that continuously over 2 movies, it pretty much maxes out the cpu. These were my stability tests