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Old 2008-07-20, 15:26   #12
VJS
 
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much better

Did you see any improvement in the memory bandwidth?

I also wonder which memory you have and are you applying enough voltage?

With most of the memory out there the bios will run it at either 1.8 or 2.0V when it is rated to run at 2.1 or 2.2 Volts.

Also 71C is way too hot! You will get errors.

Consider the following.

1. I would start by making sure your running the memory at the rated voltage probably 2.1V.

2. Whats your case temperature? If it's more than 5C above room temperature. Stop! Run to the store and by more fans , LOL. The idea here is to reduce your case temps which will both lower memory temperatures and lower your CPU temperature. Also if your running something like a 8800GT that Card ( Single slot cooling) it is probably dumping alot of heat into the system. Try removing the slot cover just below your card and making some sort of homemade ducting that pipes heat out the back of the case.

Anyways do anything and everything you can to reduce your case temps.

The above two are pretty simple.

Now consider the following.

A. Benchmark Benchmark Benchmark.

B. Now reduce your fsb a few mhz at a time until your memory timing improves to 4-4-4-#

This will probably happen around 410 Mhz it will also reduce your heat load on your CPU and alow you to run lower cpu volatge. Keep reducing your volatge by 0.01V until the system becomes unstable (which it will at some voltage) once this voltage is found add 0.02V back.

Example stable at 1.36V unstable at 1.35V. Run the system at 1.37V

So yes your running at a lower total clock but your memory is more effective. Benchmark again and see how much you have actually lost in performance, you might be amazed at how little.

If for example it doesn't happen until 408 fsb and allow your memory to run at 4-4-4-16-1T and your able to drop your CPU voltage 0.075V

So if you do the following what would you get?

Clock speed would only be reduced to 3264 Mhz or 96.7% of your unstable previous settings. Memory bandwidth much improved, lower heat dissapation which will prolong processor life, stable machine which will cruch llr if you so desire.

-------------------------------

from a PSP perspective, even if had to reduce down to 400 mhz fsb. This would be 94.7% of your previous clock but your 99.999% stable with good residuals.

Previous setting you needed to throw out 10% of your tests due to errors and restarts.

So running a slower stable clock actually produces 94.7%-(100%-10% errors) is a 4.7% MORE TESTS!!!

BTW, it took me several weeks to figure this out with my Q6600, LOL.
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Old 2008-07-20, 19:39   #13
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Quote:
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B. Now reduce your fsb a few mhz at a time until your memory timing improves to 4-4-4-#
I've got bad memory, so that won't happen :)
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Old 2008-07-20, 20:54   #14
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BTW, it took me several weeks to figure this out with my Q6600, LOL.
And it took some effort to clean up the residues you left damaged.

Just kidding. As I had to thank you for bringing the DC effort to speed.
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Old 2008-07-21, 01:58   #15
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Yeah... a 2T might be pushing it but trying to get into a 4-4-4-16-2T would be possible


@LTD yup your right that was alot of manual work checking who was the culprit. But better in secondpass than first pass.

In the end with your help we made mine pretty darn stable.

BTW waiting for those neathlems to come out then you will really have your work cut out LOL.
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Old 2008-07-21, 17:48   #16
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so i looked at benchmarks with different timings and FSB:DRAM... Decided to stop at: 8x395 (1.55 V in Bios), RAM 493,7 MHz 6-6-5-14
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Old 2008-07-21, 18:42   #17
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How is your ram at 493Mhz???

You should have your ram setting at 2x or 2:1 for a 395Mhz your ram should be running at 790 Mhz.
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Old 2008-07-21, 19:24   #18
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How is your ram at 493Mhz???

You should have your ram setting at 2x or 2:1 for a 395Mhz your ram should be running at 790 Mhz.
493x2 :)
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Old 2008-07-21, 19:27   #19
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so... when i leave computer, nothing bad happens... But when I launch 3d-application, error immediately occurs. Why? :*(
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Old 2008-07-21, 19:40   #20
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so... when i leave computer, nothing bad happens... But when I launch 3d-application, error immediately occurs. Why? :*(
As I posted before, probably a bad driver that does not correctly save and restore the Floating Point state.
What Graphics card do you have? Do you have the most current drivers for it?What Sound card are you using, or do you only use the sound on the mainboard? Again, do you have the most current drivers?
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Old 2008-07-21, 20:33   #21
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Quote:
Originally Posted by Joe O View Post
As I posted before, probably a bad driver that does not correctly save and restore the Floating Point state.
What Graphics card do you have? Do you have the most current drivers for it?What Sound card are you using, or do you only use the sound on the mainboard? Again, do you have the most current drivers?
sapphire radeon x1950xt 256 mb, I have latest drivers for x64 windows with CCC... on-board sound (Realtek 5.10.0.5391)

Last fiddled with by Nekto on 2008-07-21 at 20:33
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Old 2008-07-22, 01:15   #22
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because your memory is way to high, its really that simple.

Set your memory so that it runs at 2x your fsb it's really that simple.

Most of your problems will go away at that point.
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