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Can't pass 3.7 GHz Stable with Phenom b55 X3

post #1 of 11
Thread Starter 
Hello everybody,
I am new to this forum and have read bunch of threads and answers so i decided to join, since i liked it. Anyways i have a problem with my unlocked Phenom ii x2 555 be. it runs as a triple core (3. core unstable) at 3.7 Ghz stable (prime tested 8 hours) but when i want to go higher even with core voltage higher prime crashes in 30 sec. so what is the issue? and how can i get 4+ Stable? any help would be appreciated.
quick specs
3.7 Ghz (used only multi) 1.40v
Nb 2400 @ 1.25v
Ht 2200 @ autov (downed to 2000 or 1800 still didnt help)
Gskill ripjaws 1333 2x4gb stock timings and voltage (i tried 1066 still didnt pass 3.7)
motherboard biostar ta880gb+
heat is not an issue
Thank you for your help in advance.
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post #2 of 11
Drop HT down to 2000mhz, give your CPU-NB voltage 1.35v, give it more CPU vcore (1.45v+). And get some heatsinks for your mosfet/VRM area, overclocking that far on a board like that is a little risky.
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post #3 of 11
Quote:
Originally Posted by pessimist2006 View Post
Hello everybody,
I am new to this forum and have read bunch of threads and answers so i decided to join, since i liked it. Anyways i have a problem with my unlocked Phenom ii x2 555 be. it runs as a triple core (3. core unstable) at 3.7 Ghz stable (prime tested 8 hours) but when i want to go higher even with core voltage higher prime crashes in 30 sec. so what is the issue? and how can i get 4+ Stable? any help would be appreciated.
quick specs
3.7 Ghz (used only multi) 1.40v
Nb 2400 @ 1.25v
Ht 2200 @ autov (downed to 2000 or 1800 still didnt help)
Gskill ripjaws 1333 2x4gb stock timings and voltage (i tried 1066 still didnt pass 3.7)
motherboard biostar ta880gb+
heat is not an issue
Thank you for your help in advance.
As you may or may not know AMD locks the extra cores for a reason. This alone could be the reason, the third core may not be functioning 100%. There's also a possibility unlocked, it may not reach 4.0 (many don't OC as well when unlocked). To test try returning it to a dual core and attempt a 4.0 that way, at least you'll have an idea if your setup will handle it temp wise. It'll also give you a minimum base line for voltages.
One other item to consider would be an 8 hr of prime95 does not ensure stability. Most here would run for 12-24 hrs. Than try and pass 10 runs of ITB along with 25-50 passes of LinX to ensure stability.

How does prime95 fail?

BSOD usually indicates a lack of Vcore

A "Worker has failed" usually points to a lack of Dram voltage or CPU/NB voltage.
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post #4 of 11
A stop 0x124 is a lack of vcore.

I have my 555BE running at 4GHz but was a mission to get it there.

CPU Frequency - 228
CPU Volts 1.5125
CPU/NB Volts - 1.3
CPU ratio 17.5
other voltages stock.

CPU/NB frequency is around 2750 (your mobo may need it lower)
HT Freq - Keep as close to 2000 as possible.

Keep your ram timings and frequency as close as possible to Specs.

Turn of turbo modes etc
post #5 of 11
Ok. 2 things that is wrong I see.
1) OC on a 3+1 phase power with a Phenom II B55 x3 is a bad idea.
2) No VRM coolers also a bad idea.
Your VRM can be shutting down and causing it to fail the stress test. I would say get some VRM coolers for your mobo then try to oc it.
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post #6 of 11
Thread Starter 
Hi again.
ok this is what i have done so far
dual core mode
NB 2600 1.3250V
Cpu 4000mhz (20x200) 1.55V
HT 2000 Mhz

Still no luck
should i push the NB voltage higher? what is the max for it? and isnt 1.55vcore to high?
prime95 (Large Ftt's max heat ect) crashes after 10 min. bsod
yes i ordered mosfet heat-sink. Cool and quit is turned off.
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post #7 of 11
Thread Starter 
Quote:
Originally Posted by Dopamin3 View Post
Drop HT down to 2000mhz, give your CPU-NB voltage 1.35v, give it more CPU vcore (1.45v+). And get some heatsinks for your mosfet/VRM area, overclocking that far on a board like that is a little risky.
I did try the setting that you told me
Cpu-NB 1.35v 2600mhz
Ht 2000mhz
vcore 1.55 (started at 1.45)
no luck best result was prime crashed bsod after 10 min instead of 30 sec
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post #8 of 11
DL HWMonitor, next time you stress test go in HWMonitor click "tools" than "log" than "start recording". Run test for 15-20 if possible (or whatever you can before BSOD/crash) than click "stop recording". This give give you graphs in the "Logs" file. Check and see how/what your Vcore is doing and look for sudden drops in vcore. If you see them it means your VRMs are over heating due to lack of cooling/over volting etc.

Might help to post a snip of CPUZ with both the CPU and memory tab displayed so we can see current settings too. Might also help to include HWMonitor in the same snip.

If it were me I'd start with a lower OC, get it to pass 12 hrs of prime95, than SLOWLY make changes to the OC. This way you'll have a better idea of what's causing the problem and you'll also know your limitations better for voltage as well. You have to start with something actually stable, take your time and make small changes so you don't end up chasing your tail trying to figure out what is failing. As mentioned before 8 hrs is not considered stable. OCing takes time and patients.

Here's a real good guide if you haven't seen it http://www.overclock.net/amd-general...ing-guide.html
Take your time and study just one area at a time (take note of the proper order in which to do things), than apply it to your OC. Work just one area while isolating it from other areas to find each areas limits and needs. Start with CPU only, than HTT (ref clock) by itself, than add these two together (keeping stable with each change/increase) than add an OC'd NB Freq and finally work in the ram.

If you'd like more help feel free to PM me, perhaps we could hook up on a messenger service if you like. I'm always happy to help those that ask for it.
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post #9 of 11
What cpu cooler do you have?

EDIT
Not all Phenom II x2, x3 or x4 can hit 4.0ghz. So far a had 4 x2 and 1 x4 that could hit 4.0ghz out of like 20 cpus. Most of them hit 3.9ghz and this is with a 890FX mobo and D-14 cooler.
Edited by dixson01974 - 6/6/11 at 5:30pm
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post #10 of 11
Thread Starter 
Quote:
Originally Posted by The Sandman View Post
DL HWMonitor, next time you stress test go in HWMonitor click "tools" than "log" than "start recording". Run test for 15-20 if possible (or whatever you can before BSOD/crash) than click "stop recording". This give give you graphs in the "Logs" file. Check and see how/what your Vcore is doing and look for sudden drops in vcore. If you see them it means your VRMs are over heating due to lack of cooling/over volting etc.

Might help to post a snip of CPUZ with both the CPU and memory tab displayed so we can see current settings too. Might also help to include HWMonitor in the same snip.

If it were me I'd start with a lower OC, get it to pass 12 hrs of prime95, than SLOWLY make changes to the OC. This way you'll have a better idea of what's causing the problem and you'll also know your limitations better for voltage as well. You have to start with something actually stable, take your time and make small changes so you don't end up chasing your tail trying to figure out what is failing. As mentioned before 8 hrs is not considered stable. OCing takes time and patients.

Here's a real good guide if you haven't seen it http://www.overclock.net/amd-general...ing-guide.html
Take your time and study just one area at a time (take note of the proper order in which to do things), than apply it to your OC. Work just one area while isolating it from other areas to find each areas limits and needs. Start with CPU only, than HTT (ref clock) by itself, than add these two together (keeping stable with each change/increase) than add an OC'd NB Freq and finally work in the ram.

If you'd like more help feel free to PM me, perhaps we could hook up on a messenger service if you like. I'm always happy to help those that ask for it.
Thank you for the guide and tips. unfortunately i don't have that log record option on HWmonitor (i checked it) ok I have run prime for the last 15 hours stable under this settings.

CPU 18.5 x 200 3700 Mhz 1.385v
CPU-NB 2400 1.25v
HT 2200

ram stock settings

this is my email add me as friend if you like; pessimist2006@hotmail.de

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