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Rounding error after 8hrs - Page 2

post #11 of 21
Thread Starter 
Ill try again I guess, Problem is I have 19x and 20x no 19.5, so to get to 3.9 I have to do 19x with FSB slight overclocked and then it fails. I have a table of all my "trials" and how they failed, ill see if I can upload that, and add to it with this trial. NB will not go over 2400 for sure
post #12 of 21
Rounding problems in Prime are most of the time related to ram being unstable.
Since you have lowered your timmings to cas8, try upping the voltage to 1.65v and check again. If that works you may trying lowering again step by step till you find the error again, and put it back to the last stable value.

And if you say your NB won't go over 2400, why not leaving it at 2400 then? Try that too
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post #13 of 21
In my experience, unstable RAM and CPU-NB will error quickly during stability testing so if the error occurred at the 8hr mark than the CPU needs a minute voltage increase.
post #14 of 21
Sorry, I couldn't help noticeing that the tmpin3 tempature hit 98C max?
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post #15 of 21
Many gigabyte motherboards have "fake" sensors or stuck sensors.

AKA the software is picking up a sensor thats not temp or a stuck sensor.

I have one of those infamous stuck sensors. Starts reading 80 from a cold restart and stays there unless I temp over (p95 will cause this at the 8-9 hour mark when it does the large file test and stresses the IMC).

I hit a max of 93 on my tmpin3 (supposedly my mobo is rated for 100 under load) after a night of prime95. Check if your NB heatsink is seated properly.

I might be switching to an aftermarket downward air HSF. All these tower designs seem to bypass cooling the chipsets around the CPU. When using the stock cooler my surrounding chipset readings were better but CPU was higher.

Maybe you just hit your limit on your OC?

I can't seem to get past 3.6 GHZ on the x4 955 BE without significantly raising voltage and I hate that (at 1.425 v). At 1.4v its runs fine but crashes in prime95 after 14 hrs.

I am running 2600 CPU-NB freq (1.25v) and that did much better than running at 3.8 GHZ at 2100 CPU-NB freq (stock voltage).

Also if you're playing with the FSB remember to adjust the HT back to near stock and play with the RAM settings. You might have to run looser timing if you bumped the FSB too high.

Good luck though. I still need to figure out what throwing voltage at the NB (not the CPU-NB) does.

Also been seeing that CPU-NB and high speed is a trade off. I can get to 3.8 GHZ on air but I'll have to drop my CPU-NB down to 2100. Probably because its all integrated on one chip?

Found CPU-NB voltage tweaks to increase temps almost as much as cpu voltage.
Edited by evilferret - 1/12/11 at 8:47am
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post #16 of 21
Drop that vcore NOW!

Use 1.6v for ram

Bump at NB up.

Use 200 FSB and 20x multiplier.

Use around 2600 NB @ 1.35v CPU/NB

Around 1.475-1.5 for CPU VID.
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post #17 of 21
Also get the RAM to stock settings. Follow the CPU-Z info for the timings. Your tRC is too low on yours. Set it to stock and troubleshoot from there. Use the 666 mhz rating.

Also use 2T in command line. It helps alot with stability.

I usually touch RAM last. Set it to stock, make sure its good and start OC process.

With your current CPU-NB freq, gains on RAM is going to be minimal.

And up your CPU-NB freq. Its sitting at 1800 for a 3.9 ghz cpu. The CPU-NB freq is the speed the CPU can communicate with a large part of your system. I'm not sure how you're stable with 1800 CPU-NB. Every time I lowered my CPU-NB under stock I would get weird crashes. Things will run fine but every once in awhile I'll get weird hangs. Sometimes it'll just chug along just slowly other times BSOD.

Worse case scenario start the OC from scratch. Sounds like too many variables got played around without any information taken.

Also can somebody explain whats the point of putting more voltage on the NB (not the CPU-NB). I can't find any concrete information, except it might help stability.
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post #18 of 21
Thread Starter 
Quote:
Originally Posted by evilferret;11984002 
Worse case scenario start the OC from scratch. Sounds like too many variables got played around without any information taken.

Also can somebody explain whats the point of putting more voltage on the NB (not the CPU-NB). I can't find any concrete information, except it might help stability.


Voltage to the NB is supposed to help when overclocking using the FSB rather then the Multi, from what I've read.

And I didn't just throw all those numbers togeather and not take note, I have a table of every change i've done, one at a time, taking note on what worked, and what didn't. That was the most 'stable' 4.0 OC I had reached and it was after days of testing diffferent things. I started over last night and started my table of all my tweaks over again. I'm going to try the recommendations everyone has said, thanks again everyone, I'll post back later, +rep for the help:thumb:thumb.gif
post #19 of 21
Thread Starter 
After last night I got to a point where it will pass Small FFT for hours, but will crash blend after around 30 min, I've tried upping the voltages and nothing seems to work, havn't tried upping the CPU VID but its already at 1.55(needed for passing Small FFT) currently running 200x20@1.55, 2400NB@1.35, and stock ram speed/timings@1.55. I've tried raising ram voltages, raising CPUNB voltages, and nothing worked so I backed it back down, tried lowering RAM multi and that didnt work either... This is where I got stuck last time. Temps are maxxing around 42C
post #20 of 21
Thread Starter 
Decided to back off and just try to stablize 3.9 and get as close to 4.0 as possible, heres a screenshot, Voltages are the following:

CPU: 1.525 (failed @1.50 last night after 8hrs max temp 40C)
CPU/NB: 1.35
DRAM:1.65 (planning on backing off after stability found)

Thinking of just upping the FSB until I hit my max, because 200x20 won't work it seems. I'm I at the max voltages I should run?

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Edited by blkdoutgsxr - 1/14/11 at 10:59pm
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