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*** Official Opteron 170 Ocing Thread ***

w3bbo said:
Yeah CCBWE UPMW 0550 408L batch. it will boot into windows and run s&m/OCCT/SuperPI32 at stock vcore (1.35v) but fails prime95 on core 0 within an hour or so. Needs 1.44 to become stable.
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Guess you have just been unlucky with a weak core mate.
My other opty did that would need a lot of vcore to strengthen the weaker core.
 
Yeah maybe a weak core but I reckon my memory is the real problem (3500LL) or even the motherboard. Core 0 is definately weaker than core 1 at low volts but if I pump it up to 1.45vcore (trying for 2.8 stability) core 1 is failing where as core 0 is fine...work that out! Cant really go much higher than 1.45 as temps are becomming a problem (50c under load) and I wont risk removing the IHS(again) just yet. Gonna try lowering the memory on a 100mhz divider to eliminate that possibility.

On a side note has anyone tried clocking higher HTT with a lower multi say 9x310 with these opty's?
 
w3bbo said:
One thing I have noticed is that compared to my 165 smpw that was running @ 1.55v, my 170 running at 1.44 vcore is a lot hotter (52c under dual prime) whereas the 165 was 45c.
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surely its just of a case of twice the cores/twice the heat but the lower voltage reducing it from quite that sorta temp. Wont a dual core draw a fair few more/double the watts of a single?
 
Big.Wayne said:
Which? a CCB1E 0550 VPMW (unopened?) cool how much?, and what you doing with your current 170?
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Yup, a CCB1E 0550 VPMW, ...sitting on my desk now :D
It's a 678L50*** chip, should be a decent OC'er... ;)

I did send my CCBWE 0551 UPMW back, wasnt even stable at 2.5GHz on stock.
 
Kamakazie! said:
surely its just of a case of twice the cores/twice the heat but the lower voltage reducing it from quite that sorta temp. Wont a dual core draw a fair few more/double the watts of a single?
Click to expand...

The 165 and 170's are both dual cores.

GL with the new chip Clint :)
 
I have a CCB1E vpmw 165 that does 2.84 ghz at 1.4v does 2.9 but needs 1.55v and didn't want to use this voltage for an extra 60mhz. Just sold a 170 CCBWE upmw 408L on ebay that a guy over on xs has clocked to 3.1 ghz on phase had 3 of these but only opened one but it would do 2.8 at 1.4v but no higher :)
 
Clairvoyant said:
Could it be anything to do with my heatsink, should i refit it.
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There seems to be a lot of reports that the opterons perform better when cooler, some go as far as saying that the opteron needs less vcore when running cooler also.

One member over at xtreme systems reported that his overclocked CPU would error as soon as it hit a certain temp (44°C I think??) so its worth keeping an eye out for this also.

The way memory acts on an A64 with its onboard memory controller is different from the P4 so its worth having a play around with it to see how your existing memory sticks interact with the new controller.
 
Hahum.

I've been fiddling with my system the last couple of days. This CCBWE 0550UPMW (408L) clocks to 2.8GHz just fine at stock 1.39v, but not much over that. To get it any further I will have to pump some more volts through, but I don't think it's going to be worth it, particularly as it's running hot already (52C under load). I need to investigate why this is - from what I can find the UPMW tends runs fairly hot at low voltages when overclocked, so perhaps it's something I have to live with. This is with the case open and an Akasa Amber 120mm fan on the Big Typhoon - I might need a higher RPM fan, too.

So after deciding the CPU, I tried seeing how the memory would do. After some experimenting and testing, it looks like it's good to go at 229Mhz/DDR458 at the rated 2-3-2-6-1T timings with 2.7v, which is pretty good. You probably realise this is the 5:6 (166) divider, which means the HTT is running at 275. The ram doesn't seem to like the 280Mhz even at 2.8v, and considering the tight timings it doesn't seem worth it to loosen the timings for a few extra MHz.

The next divider is the 216Mhz one, which adds up to a memory speed of 302 (HTT 280), but somehow I doubt it will run that no matter how loose the timings or juicy the voltage!
 
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I was having a fiddle around last night with my oppy 170, which I'd had runing at 2.6 with 1.35 volts. I tried at 2.8 but wasn't able to get into windows, 2.7GHz however, has been running for several hours overnight on two instances of Prime95.

One thing I noticed however is that 270x10 with a 3:4 divider (202.5MHz memory) runs fine, but when I tried 300x9 with a 2:3 divider (200MHz memory) it wouldn't boot in to windows. This is on a DFI Ultra-D so I would've assumed that it would be fine with those HTT speeds.

I've adjusted the HTT multiplier and tried a little extra LDT and chipset voltage but it's not having any of it. Are there any bios settings I can adjust to help it out? Do the memory timings only affect the memory sticks or does it affect the memory controller too?

Any suggestions appreciated, cheers.
 
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