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Pushing my chip to the limit!!! - Page 3

post #21 of 41
Thread Starter 
Quote:
Originally Posted by Asustweaker View Post

actually not too sure about that, i do know that it can take up to 8 hrs to fail. The nb gets a butt kicking around that time. My 4.2 was stable four 7.5 hours, at 8 hours it would crap out. it needed MOAR volts on the NB\CPU.
Getting rid of the crappy ram is the top priority.
Have you adjusted your clock skew yet?
And does the 820 have an unlockable cache?
EDIT: just saw the rig in you sig LOL

Well my latest test in the OP crashed after 1.5hrs in Prime95 Blend mad.gif

I upped the NB voltage from 1.275v to 1.3v and upped my vcore one step.
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post #22 of 41
Dude!!! adjust your clock skew!! it really helped me

Another thing you can do is download SPDTool, it will give you drive strengths for you ram. may also help the instabailty issue.
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post #23 of 41
Thread Starter 
Quote:
Originally Posted by Asustweaker View Post

Dude!!! adjust your clock skew!! it really helped me
Another thing you can do is download SPDTool, it will give you drive strengths for you ram. may also help the instabailty issue.

Ive had it stable at 255. Im only at 258 now. If I cant get it then oh well, your probably right im hitting some sort of MB limit on base clock.
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post #24 of 41
drive strength adjustments and clock skew with my amd rig, gave me 15 more bsclock.
You can also lower your ram multi by one and drop the cpu multi, giving you the head room to find out if you are at your boards max base clock, with out overclocking the CPU to it's limit.
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post #25 of 41
Thread Starter 
So I know lots of ppl say use Prime95 for 12hours+ while others say just a couple is fine.

Question? I would never stress my system that long with regular use.

Is the argument "Its not just how long you stress it, its that if its unstable it can error at any time. Like 7 hours into Prime then next time maybe 2 hours in?
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post #26 of 41
That easily possible, yes. It's not going to crash at the same point each time. You are playing a statistics game. Even if you do Prime95 for 12+ hours you can't be 100% certain it's stable just 'reasonably' sure. I personally don't waste that much time with it, the longest I've ever let Prime95 run is overnight and even that's rare. If Prime95 can run for longer than my maximum gaming session (I don't think I've gamed for longer than 4hrs in years), I'm happy.
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post #27 of 41
It is true that the test should be run for 12+ hrs to ensure complete stability. Reason being if you get a severe spike in load durring a game or what not, you might chrash. Prime only uses so much actual memory %45ish. If you are doing some hardcore gaming, the game may use something closer to 80+ of your memory. This being the case, if you only stress the system for a couple hrs, you may receive a crash cuz the program is stressing the memory at the same time using close to the total amount of actual resources.

What else have you changed in you settings??
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post #28 of 41
Stability is all relative, for instance...

I can get my proc stable (ish) @ 4.12 and never have a problem with day to day things... But when I comes to that day in the week where i need to transcode for 4 hours straight @ max load, It would sometimes kick an error or flat bsod out of no where.

testing each clock is necessary to find the individual limits... only to a certain extent can you just "play" with clocks until you find a happy medium.

In my case I found, after breaking down the clocks and finding which clock was giving me the errors, that my proc simply wanted too much voltage then i wanted to give to run @ anything over 4.1. I found that 4040mhz was its stability at the max voltage I wanted to run, 1.45 (considering heat and longevity in this case).

Finding a fsb and multiplier combo that you would like to shoot for is first order of business. Then clock each component independently to find where is happiest.

I always start with the "backend" clocks. ( ht, nb, ram...)

For example, start at a fsb... but keep everything low clocked except for the clock you want to test. Say the NB first. Crank the multiplier or fsb until you find its instability at the voltage your comfortable with.

Set that clock and move on. Add to that ram clocks, and so on and so forth...

However, in this case you have some good info on stability of your chip. Taking advantage of some experience here on the forums can help you find what your setup likes.

In your case, stop adding cpu voltage... these cpus can easily do 3.8 @ 1.4 - 1.45 volts. The NB is normally the problem people overlook.

NB will need anywhere from 1.35-1.4 to get to around 2.6-2.8 in most cases. do yourself a favor and save the heat and unecessary voltage and drop your cpu to as close to 1.425v under load. and jump your NB to around 1.375 - 1.4.

your memory will easily be your brick wall before anything else. Drop the 1t to 2t and find its limits with 1.65v. Not having a BE proc ties you to your rams capability.

otherwise you will just be beating your head against the wall of wrong clock and wrong voltage.

OC'ing a proc is investigative work, not guess and check.

GL
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post #29 of 41
Thread Starter 
Im running memtest86 and it says my RAM is running at 533?? But really its set in the bios at 687...

Whats going on there?
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post #30 of 41
don't worry about what memtest reads. Its rather "dumb" with its timing access readings. It only rounds off to a number, it doesnt have the capability to read the exact timings from the bios. What you have set in the bios is what the memory is running at.

On the other hand 687 memory should be 5.33 * 258fsb.

3612mhz clock is pretty good for that proc's multiplier. If your NB is running a 10* multi, whats it's voltage @?

I would guess the your chips NB @ 2580 would need about 1.325v ...
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