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Phenom II steppings and max OC 550-940 - Page 89

post #881 of 2829
Wow... This thread is huge now Last time I've been here it was only few posts
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post #882 of 2829
Quote:
Originally Posted by richierich1212 View Post
I have the same cooler, mobo and case as you. But I tried those settings and my computer crashes under load. Should I tried ganged mode? How much voltage did you put for your RAM, HT or NB? And how is your NB frequency so high?
With overclocking, you really can't expect the settings that worked for one person to work for another, even given the same components. Even chips from the same waffer can differ (i.e. the ones on the inside tend to oc better) let alone processor family. That said, sometimes it is useful to see what someone can achieve given your components, and aim to see if it would work for you. Moving past that, you have temperatures (cooling methods, country of residence etc) and different steppings/revisions of the same product.

However, the answer as to why its stable for him and not for you is a lot more complicated, and in practice you may never find out. Now, to answer some of your questions!

1) Unganged mode tends to be better, and for me it definitely was. There are times when ganged mode is better, but usually these situations are pretty rare. In the end, you will have to test which works best for you to determine the mode to set - for most people however (and with multi-threaded applications) unganged works better. Edit: to provide a better definition, I googled up 'ganged vs unganged':

http://houseofhelp.com/forums/showthread.php?t=67607

Quote:
The Phenom has two memory controllers on the CPU. Ganged is setting both memory controllers to work together which allows data (that is being used by all cores) to await on the queue until they are accessed. Unganging means that the two controllers work independently. This allows them to work asynchronously with reference to individual clocks with their one or two Dimms. I would set your Quad Core to unganged.

I would set the DRAM to 800Mhz with 4-4-4-12 as you are populating all four DRAM slots with 1066Mhz DRAM. This will bring you a better stability with that system.
2) The amount of voltage that you can safely apply to your ram differs from module to module. Generally it's best to find the rated voltages your ram is specified to run at, and then applying .1v if you feel that you should. It should be easy to find on your manufacturer's website. It's almost universally accepted that increasing your ram by .1v should do absolutely no harm. This is not always the case however.

3) Certain chips and mobo/processor configurations allow for different NB frequency clocks. Some chips may be able to hit a very high cpu frequency, but may only be able to hit a very low NB clock. Upping the NB-CPU vid (and also the NB voltage for your motherboard, if thats the issue) can help you maintain stability at higher clocks. It's important to note that if you change either, its similar to the cpu vcore; you need to check and monitor temps to ensure it's safe.

Finally, if you can tell us how/why you crashed, it could help us figure out what is causing it as well! Hopefully this rambling was useful, and good luck on your oc!
Edited by Drin - 2/6/09 at 3:59pm
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post #883 of 2829
Well my computer BSODs most of the time when I overclock (higher than 3.5GHz) with a page fault error.
post #884 of 2829
Quote:
Originally Posted by richierich1212 View Post
Well my computer BSODs most of the time when I overclock (higher than 3.5GHz) with a page fault error.
What's your temperatures like, especially under load? If you noticed what your temperatures were shortly before crashing that would be great too. When does it crash, and are you testing for stability using any program?
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post #885 of 2829
I use Prime95 for stability. Load temps are around 50-55 degrees C. Idles around 35.
post #886 of 2829
Well your temps seem to be fine at least, I'm assuming those are for your stable 3.5ghz OC? I think you know what you're doing, getting a 920 past 3.5ghz isn't very easy, and requires some effort from what I've heard.

You may actually want to try lowering your vcore, as this can help in certain situations because these chips prefer lower temps over volts. However, you still need both, as your cpu will not run stable for a given overclock without a certain amount of voltage. This mainly helps if you simply up the vcore without exhausting all the various combinations you can use to reach a certain speed, and is a useful tool when oc'ing the phenom II's. It's important to note that this might not work at all, but it's worth trying. I.e. try using a different combination, and a lower vcore for it. If that fails, eventually notch your vcore back to where it was.

Beyond that I'm not sure if I can provide anyhelp; you already have a nice OC, and might know more than me. Disable CPUtweak, autoexpress, ACC if you have them, they won't help you and may cause instability. Most people prefer to disable cpu prefetching, on my system it's horrible and only hinders me but for you this will depend on your configuration.

Finally, try to test the maximum frequency you can obtain with your cpu before trying to OC your ram, NB clock, HT link (although I suspect you already tried this, correct me if I'm wrong sorry). Note that you should always try to keep your HT link < or = your NB frequency, or it will probably be completely unstable. I know for my motherboard, it won't even let you set the HT link to be > NB clock. Once you've found out how far you can push individual aspects of your system, it should help a lot in determining what maximum final oc you can acheive.

Hope that helps
Edited by Drin - 2/6/09 at 5:23pm
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post #887 of 2829
Thanks your help Drin. Yeah I'll keep messing with the settings. My system seems to need 1.4v just for 3.5GHz though, but I need to tweak little by little.
post #888 of 2829
honda, the ACC you set, is that within AOD or bios? i tried to do it in my bios and event hough i had my voltages set to 1.48 it jacked mine up to 1.66 and wouldnt let me boot. kept giving me a cpu overvolt.
    
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post #889 of 2829
Quote:
Originally Posted by emersonsc View Post
honda, the ACC you set, is that within AOD or bios? i tried to do it in my bios and event hough i had my voltages set to 1.48 it jacked mine up to 1.66 and wouldnt let me boot. kept giving me a cpu overvolt.
You need to go into Hardware Monitor and on VCORE Voltage set that to Ignored, then you wont get that CPU overvolt anymore.

The ACC I have set that with BIOS
Edited by HondaGuy - 2/6/09 at 7:13pm
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post #890 of 2829
Quote:
Originally Posted by HondaGuy View Post
You need to go into Hardware Monitor and on VCORE Voltage set that to Ignored, then you wont get that CPU overvolt anymore.

The ACC I have set that with BIOS
I wonder if this is my problem when OCing the NB. Will try this and see what happens. thxs honda.
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