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955be Crashing at 3.8ghz

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December 4, 2011 6:59:37 PM

im not sure whats going on but my guess could be the cpu-nb(stock). ive gone 1.350-1450 volts with the cpu and the thing crashes within a few mins of prime 95 blend test at 3.8 but stables at 3.6@1.35 Any ideas?

955be
Ga-870a-ud3
kingston 2gb stick 1333ghz

More about : 955be crashing 8ghz

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December 5, 2011 3:08:28 PM

Could be a stock HSF issue. What temperatures are you getting at 3.8?
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December 5, 2011 3:26:57 PM

If you're using the stock cooler it's probably overheating. What are your temps?
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December 5, 2011 3:36:52 PM

amdghz said:
im not sure whats going on but my guess could be the cpu-nb(stock). ive gone 1.350-1450 volts with the cpu and the thing crashes within a few mins of prime 95 blend test at 3.8 but stables at 3.6@1.35 Any ideas?

955be
Ga-870a-ud3
kingston 2gb stick 1333ghz


As mentioned above it could be your temps, check the revision/stepping on your processor and make sure you're not exceeding temp limits. Another thing to check for is voltage drop from your motherboard under load. I would use something like HWMonitor to watch those voltages under load during your stress testing.
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December 5, 2011 6:56:06 PM

stock cooler as for the temps they sit at 60-61.
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December 5, 2011 9:04:38 PM

Well there's the problem right there, it's the stock cooler. If those are you temps at idle that's way to high. Even at load you don't want to go too far past 60C. Get a better cooler if you want to overclock more.
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December 5, 2011 9:39:15 PM

No thats at full load with blend test
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December 5, 2011 10:31:20 PM

amdghz said:
No thats at full load with blend test


I don't know about the 955, but my 965BE has a max temp of 62. Getter a better cooling solution. Also did you check your voltages under load for droop?
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December 5, 2011 10:51:20 PM

Lower your HT link speed to 5x (1Ghz) and raise your CPU NB slightly. Also get a better cooler.
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December 5, 2011 11:03:40 PM

spasmolytic46 said:
I don't know about the 955, but my 965BE has a max temp of 62. Getter a better cooling solution. Also did you check your voltages under load for droop?

no I haven't
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December 5, 2011 11:07:30 PM

amdghz said:
no I haven't


Some motherboards have issues giving a good constant voltage when overclocked and under strain. My MSI mobo blows goats at it. I can't get anything over 1.4 no matter what my bios is set to. It's a problem in a lot of boards, even in ones that are supposedly for overclocking.
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December 5, 2011 11:14:12 PM

Thanks for the info I'll have to check when I get a chance. Hopefully by the end of the week I'll have some cash to grab the hyper 212 evo to see what's really going on
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December 5, 2011 11:15:43 PM

Temps to begin with need to be addressed pronto..You should keep the temps under 57c if it can be helped...As for the vdroop...When running prime what are your voltages as per CPU-Z....idle and 100% load.

Your cooling solution should be the Cooler Master Hyper 212+ as it is cheap and keeps things "chilly" under most OCing scenarios

What are your complete BIOS settings i.e. RAM speeds, voltages, multi setting,NB and HT clocks and voltages, etc...I need more input to fix your issue
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December 5, 2011 11:19:04 PM

megamanx00 said:
Lower your HT link speed to 5x (1Ghz) and raise your CPU NB slightly. Also get a better cooler.

what's the performance drop with the ht to 1ghz
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December 5, 2011 11:21:03 PM

Leave the NB at 2000 MHz thats not the problem here...The performance drop is substantial as the NB contains the IMC and it will slow you down:

IMHO these would be my settings with the aftermarket cooling solution such as the aforementioned CM Hyper 212+

Multi.= x20
Vcore= 1.488v-1.525v
FSB=200 MHz
RAM=1333 MHz
NB=2000-2400MHz depends on the board
CPU-NB voltage= 1.15-1.2v
NB voltage=1.2v
HT voltage= 1.1-1.2v
HT=2000-2400MHz

All other voltages set to manual and to default voltages if applicable



DANGER: TEMPETURES AND VOLTAGES SHOULD BE MONITORED AT ALL TIMES..THAT CHIPS VOLTAGE THRESHOLD IS 1.55V AND THE TEMPETURE SHOULD NEVER STAY ABOVE 60C FOR ANY LENGTH OF TIME !!! USE VOLTAGES WITH CAUTION....NB LIMIT IS 1.35V AND IT SHOULD NEVER EXCEED 1.25V IN MY OPINION
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December 5, 2011 11:22:24 PM

lowjack989 said:
Temps to begin with need to be addressed pronto..You should keep the temps under 57c if it can be helped...As for the vdroop...When running prime what are your voltages as per CPU-Z....idle and 100% load.

Your cooling solution should be the Cooler Master Hyper 212+ as it is cheap and keeps things "chilly" under most OCing scenarios

What are your complete BIOS settings i.e. RAM speeds, voltages, multi setting,NB and HT clocks and voltages, etc...I need more input to fix your issue

everything is set to default
2gb 1333
multiplier set to 3.8ghz 1.35-1.45.. Bootable at 1.375
Ht 2000
cpu-np:2000
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December 5, 2011 11:36:28 PM

Yesterday i tried a 20 min test for s@giggles
seemed ok but i didn't have time to sit and wait
3.6@,1.35
Cpu-nb@2400:1.25
Ht-link@default
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December 5, 2011 11:42:00 PM

The NB OC will increase data throughput from the RAM I always save it for last when OCin a rig
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December 5, 2011 11:50:53 PM

lowjack989 said:
The NB OC will increase data throughput from the RAM I always save it for last when OCin a rig

ok.. As for the 3.8 i wont go above 1.40 till i get a good cooler. I'll start from 1.4 and work my way up but as for the CPU-NB how to find the max? Setting everything back to default then bumping the NB once i crash increase the volts etc. If so does that apply for htlink aswell
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December 5, 2011 11:55:51 PM

NO.......the NB should never, ever, ever exceed 1.25v and it shouldn't have to be anyways as 1.2v is usually enough ...you will cook your NB if you push it to hard trust me on that one 1.35v is the MAXIMUM and as I put it DO NOT exceed 1.25v as the NB is really sensitive
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December 6, 2011 12:07:04 AM

lowjack989 said:
NO.......the NB should never, ever, ever exceed 1.25v and it shouldn't have to be anyways as 1.2v is usually enough ...you will cook your NB if you push it to hard trust me on that one 1.35v is the MAXIMUM and as I put it DO NOT exceed 1.25v as the NB is really sensitive

that's what I thought I won't go above 1.25 that's for sure. So im thinking 2400 will be my max for me until i get some 1866. From what i read cpu-NB at 2800 is a good setting for ram running at 1600mhz.
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December 6, 2011 12:09:40 AM

My NB is at 2808 MHz @1.2v and my HT is at 2600@1.2v RAM is at 1600..CPU at 4.2 GHz @ 1.525v
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December 6, 2011 12:12:45 AM

How did you get those NB and ht settings? By dropping the multi and running a stress test one at a time?
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December 6, 2011 12:16:25 AM

I just set it them to that in the BIOS and use a 200 MHz FSB and viola as for the voltages I did a lot of research on it and just put it 1.2v and again viola
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December 6, 2011 12:25:06 AM

you me and both brother.. Checking and checking over and over lol. There's a video of some guy saying to find the max you do the the math etc.. Take the fsb add 5 so 205 then set everything back to default settings or under and run prime 95 for 20 mins then purchase a subscription to my web site for the rest of the video lol "cpu-NB overclocking"
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December 6, 2011 12:30:53 AM

I have pretty much mastered OCing AMD set-ups..Hell I think I could right a small book on it myself..I mean hell ...check out my signature I booted at 4.51 GHz with a 890 GX board with a 965 BE..I OC my gaming 965 BE to 4.3 GHz stable as per prime95...that running blend, small fft's, and then the daunted large fft's 8 hours each test..Rock Solid at 4.3 GHz
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December 6, 2011 12:43:35 AM

Yeah I saw that when you first posted.. I'd like to run that while playing arma
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December 6, 2011 4:20:34 PM

amdghz said:
what's the performance drop with the ht to 1ghz


The drop in performance is very small. The HT link is the last thing to affect performance, but it improves stability when overclocking. It's your link between the CPU and the motherboard. Once you reach your final CPU OC you can begin raising the HT link and testing for stability.
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December 27, 2011 12:11:19 PM

UPDATE: Finally got the hyper 212 evo.. 3.8 at 1.425v, ran prime for 5+ hours no crash. But when trying to hit 4.0 i blue screen after 15-20 at 1.525 volts
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December 27, 2011 4:54:08 PM

Did you watch to see how much vdroop you had while loaded?
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December 27, 2011 5:05:56 PM

You guys forgot the basic question.

Is your CPU revision C2 or C3?

HT = 2000 at auto voltage is the "best" performance
NB voltage = Don't change this or use 1.150V (I use that)
CPU-NB = 1.3V-1.325V on air, not more high that CPU voltage
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December 28, 2011 1:42:52 AM

lowjack989 said:
Did you watch to see how much vdroop you had while loaded?


Once again I did not lol.. ill give a go tomm but what I noticed is when setting the volts in the bios it has a different read out on cpu-z. For example i set the volts to 1.50 cpuz says 1.488 is that normal?
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December 28, 2011 1:58:26 AM

Yes it is normal for CPU-Z to read to the voltage as its applied it "bounces" so its voltage fluctuations...Thats looks like you have a slight vdroop "off-the-get-go"...Mine does the opposite it applies more voltage than BIOS....I set my vcore to 1.525v and I get 1.536v actual
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December 28, 2011 2:44:47 AM

lowjack989 said:
Yes it is normal for CPU-Z to read to the voltage as its applied it "bounces" so its voltage fluctuations...Thats looks like you have a slight vdroop "off-the-get-go"...Mine does the opposite it applies more voltage than BIOS....I set my vcore to 1.525v and I get 1.536v actual


So what should i do?
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