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Opteron 170 G.skill PC4000 HZ overclock HELP!

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I have some major problems overclocking my Opteron 170 (CCBWE 0550UPMW)! :(


It just wont get past 2.5Ghz, works just fine at 2.43Ghz (2xPrime95 stable)

Im using:


RAM: 270 3-4-4-10 1T 2.6 volt

CPU: 2.43Ghz (FSB*9)


Its Primestable for about 30 Min when raising FSB to 272.

I tried using dividers on ram also, but it still the same thing.

Tried raising vCore to 1.45 @ 2.5 Ghz but it dies faster in prime then when im using 1.31 volt. Also raised LDT and Chipset volt without any progress.


Could it be that the temp reading are to low and the cpu is much hotter then the info says and thats why it dont like the higher volt...


Ive been trying different bios and configurations för about 3 days now and it drives me mad that i wont get past 2.5Ghz, never heard of an Opteron 170 that wont do that...


Last night i ran Prime for about an hour at:

FSB 278

RAM 278 (1:1) same timings and volt as above

CPU 278 * 9 ¨, 1.31 volt


But when i tried the same configuration today prime 95 died after about 3 mins. thats kinda strange i think...


Look at pic and sig for moore info...



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My HZ sticks seem to top out around 265fsb 1:1 and anything above requires a divider. When running a divider, I have more success setting the ram to 3-4-3-5.


I don't like this ram :-(




I spoke too soon! I now have them at 270 and stable! I've had this ram for about 3 weeks now and had tried so many different settings but the on that seemed to do it was setting ram drive strenghts to Weak 4 and Level 3. I'd never tried that combo before and got the idea from post#121 here:




I'm running 1:1 and using 2.53vdim.


I'm starting to like this ram a little more now, but I still miss my balistics! (when they worked)

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Not sure if i can offer any help other then to let you know you're not the only one...


I am having a similar problem with my Opty (CCBWE 0550UPMW).

I have pretty much hit a wall at 2.5GHz and can't get past it....

@ 2.5GHz its prime95 stable for over 9 hours & my temps are reasonable (32c/41c)

but in order for me to boot into windows above 2550 i have to up the volts to around 1.5 & even then its not stable.

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in my previous post i said that i couldn't boot to windows past 2.55GHz... This isn't true anymore i changed my Tcl to 3 (was 2.5) and now i can boot all the way to 2.9GHz tho i haven't tried to get past that. right now i am working on stabilizing 2.8 when i get everything stable i'll post some screenies....

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Try this:

First change bios to 623-1, that is the best for your combo.


First thing you do in new bios is "load optimized defaults"


...then you set these timings:


HTT - 270MHz


DRAM Frequency Set - 200

Command Per Clock (CPC) - Enable

CAS Latency Control (Tcl) - 3

RAS# to CAS# delay (Trcd) - 4 Bus Clocks

Min RAS# active time (Tras) - 8 Bus Clocks

Row precharge time (Trp) - 3 Bus Clocks (4 maybe)

Row Cycle time (Trc) - 17 Bus Clocks

Row refresh cyc time (Trfc) - 24 Bus Clocks

Row to Row delay (Trrd) - 4 Bus Clocks

Write recovery time (Twr) - 3 Bus Clocks

Write to Read delay (Twtr) - 2 Bus Clocks

Read to Write delay (Trwt) - 4 Bus Clocks

Refresh Period (Tref) - 3684

( Write CAS Latency (Twcl) - Auto,1 )

DRAM Bank Interleave - Enabled


DQS Skew Control - off

DQS Skew Value - 0

DRAM Drive Strength - 6

DRAM Data Drive Strength - 1

Max Async Latency - 08.0 Nano Seconds (09.0 maybe)

DRAM Response Time - Normal

Read Preamble Time - 06.5 Nano Seconds

IdleCycle Limit - 256 Cycles

Dynamic Counter - Enable

R/W Queue Bypass - 16 x

Bypass Max - 07 x

32 Byte Granularity - Disable(4 Bursts)


Memory voltage 2.5v

CPU Vid - to whatever you need..

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