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Discussion Starter · #1 ·
Ok, so i got my 3.2Ghz up to 4.01 Ghz at 1.58Vcore running 45c idle

Problem is that when i try to run Vcore i get an error through windows and prime95 closes. See screenshot:

http://www.coldsystems.net/overclock/prime95crash.jpg

I am wondering if this might be a ram problem? I admit, my ram isnt top of the line...


Any input is greatly appreciated.
 

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Discussion Starter · #3 ·
Memtest86 returned no errors, and if i am correct CAS: 2.5-4-4-8 means i am only .05 off from 3-4-4-8 on timings right? or is that CAS something else? I never really have understood the timings thing...
 

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Quote:


Originally Posted by Neocold

Memtest86 returned no errors, and if i am correct CAS: 2.5-4-4-8 means i am only .05 off from 3-4-4-8 on timings right? or is that CAS something else? I never really have understood the timings thing...

I've had similar issues. Memtest sometimes blows through 4 complete tests with no errors and then prime errors out.

Try the 3-4-4-8 timings, increase your ram's vcore to 2.8-2.9 volts or higher if you wish, but watch the warantee limits of your manufacturer.

How about heat the the processor, what does the board report for temps? Also, run throttle watch to see if your CPU is throttling. Sometimes reported temps are wrong.

250fsb is pushing it for value ram also, not to mention pretty high for a cpu allthough prescotts are pretty good overclockers. Research your mainboard to see if anyone knows its limits also.

You are erroring out pretty fast in prime, its under 3 minutes based on what I can see in that pic. Thats not a good sign.
 

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Discussion Starter · #5 ·
i duno how to adjust the ram to 3-4-4-8... or vcore on ram up so much... my mobo only allows ram to be adjusted by fsb of 133, 166, and 200 and vcore by .1 and .2

i am currently running 166 fsb and .2 vcore.... comp wont work on 200 fsb.... board seems to be reporting same temp...

as for throttlewatch... i dont quite understand how to read it.. if the yellow goes up does that mean that the cpu is lowering the speed for temp reasons? while green is actual cpu usage?
 

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With throttlewatch its the lower graph, it is in RED. If you dont see any red graphing or RED bars on the side, you are good.

Sounds like your mainboard is limited in options so thats probably your problem.

Have you tried an updated bios? Sometimes you get more options with the latest bios..
 

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Discussion Starter · #7 ·
updates bios, everything is still the same far as i can tell....
 

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Quote:


Originally Posted by Neocold

updates bios, everything is still the same far as i can tell....


It looks like there are a few different models for that mainboard.

Can you tell which revision and exact model it is?

I see like, Pro, Pro 2 and a couple different revisions..

I assuming you have nothing that looks like this..

http://www.pcstats.com/articleview.c...id=1492&page=4

Ohh, I see. I thought you were running a p4 3.2 at 800mhz FSB. So you are running at 133mhz X 4 =533mhz.

Have you run CPU-z to see what your memory is rated for? If your memory is only rated at 133 mhz x 2=266, and its value mem, then you will be hard pressed to overclock that to to 166 x 2=333mhz without running a divider. It looks like your bios only has 2.0x or 2.5x the fsb. Your only option might be to run the memory at 2.0x which is a 1:1 ratio of your FSB, and see how high it will go.

I have a similar problem on another system.

Also, make sure your agp/pci freq. is locked at 33/66
 

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Discussion Starter · #10 ·
ok, here is what my bios shows:

CPU Host Frequency (Mhz) 250 100-355
Memory Frequency for 1.66 1.33/1.66/2.0/Auto
Memory Frequency (Mhz) 415 Changes as two above values are changed
AGP/PCI/SRC 66/33/100 Didnt check possible settings
DIMM OverVoltage +0.1V Normal/+0.1V/+0.2V
AGP OverVoltage Normal Didnt check possible settings
CPU OverVoltage +10.0% Normal/+5.0%/+7.5%/+10.0%

Also, i switched one ram stick with another had had in another computer (better speed capabilities) and i am now able to run Prime95 a bit longer and this time it stops itself with an error, however a second running of it without rebooting yields the same crash as before. This further supports my theory that it is a ram problem...

Also, you said AGP/PCI 33/66 seems i have it reversed (default settings) so i need to change this or were you backwards?

P.S. Thanks for all of your help.
 

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No, I'm probably backwards on the AGP/PCI it can only go one way.. 33 on the pci and 66 on the agp..

Ahh, ok. According to your CPU-Z, one of the sticks of ram you are using is rated differently.

So, in order to hit that 200mhz mark on the memory you need the timings to be at 3-3-3-8. You can only run as fast as your slowest stick.

So at the moment you are running a divider of 5:4 cpu/ram. 250/200.

It looks like your memory is capable, but you have to run at the timings of that slower stick.

EDIT
Looked at your mainboard manual.. I see what you mean how you can't set the timings manually. So you may want to try swapping the ram sticks in the opposite slots on your mainboard, maybe it will take the correct timings depending on what slot the memory is in because right now, it's using the timings designated by the faster ram. This may or may not work, I'm hoping it's that easy. use slot 3 for dimm1 and slot 1 for dimm3. Have you tried installing them as single channel. This may solve your issue also at the cost of dual channel performance.

So, once you swap the sticks check CPU-z and see if the set timings are the 3-3-3-8 timings. If they are, run Prime and see what happens.
 

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Discussion Starter · #12 ·
i swaped the sticks, then also went single channel, and timings stayed the same, infact prime95 started crashing again insted of getting its own error. So i switched the sticks back to how they were and i am still crashing instead of erroring in prime 95...
. i think it is time to buy some dual channel ddr no?
 

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Quote:


Originally Posted by Neocold

i swaped the sticks, then also went single channel, and timings stayed the same, infact prime95 started crashing again insted of getting its own error. So i switched the sticks back to how they were and i am still crashing instead of erroring in prime 95...
. i think it is time to buy some dual channel ddr no?



I suppose the final test would be to just install ONE stick at a time. Check the cpu-z SPD against your set timings for that one stick, then run prime. If your errors stop, well you know the answer.

Maybe even try installing both of the sticks, one stick at a time to see if one causes problems and the other does not. More then likely, it is because they are not matched...
 

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Discussion Starter · #14 ·
there is a sale at a computer store in my area for some dual channel ram... tis pc 3200 1GB Kingston dual channel at 400Mhz (so 2 512 sticks)

only 90 bucks with a $30 rebate.... think this would solve the problem?

Note: it is value ram

or i could get a second stick of ocz which i have in another comp which has timings of 3-4-4-8
 

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Quote:


Originally Posted by Neocold

or i could get a second stick of ocz which i have in another comp which has timings of 3-4-4-8

Sure, try matching the pair with your other computers memory or least try the one stick at a time routine, and see if it works before you buy more memory.

But you still have the problem that the one stick you have installed is 200mhz at 3-3-3-8 and the OCZ is 3-4-4-8 @200mhz. Maybe if you up the voltage on the ram that ocz will run at the 3-3-3-8 settings. Give it a shot. 2.8 volts on the memory will not hurt the memory at all. They are probably guaranteed up to 2.9volts if not higher. I dont know what the limit is on the board for memory voltage. Mine only goes to 2.8 but its a different make/model.

So you might have the same problem, but try everything you can before you drop the dime.
 

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Discussion Starter · #16 ·
the memory seems to only run at 2.5-4-4-8 according to cpu-z, i changes sticks, uped volts, uped fsb on ram and everything, but the memory pannel in cpu-z ALWAYS reports 2.5-4-4-8 hum???

i ran all sticks solo, paired diff, etc, nothing worked....
 

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I know, I was reading your manual. Doesn't seem to let you choose the timings. That sucks. Have you searched the entire bios for those settings? They could be in some other part odd part of the bios settings.

Or maybe if you switch to manual SPD it may pop up? Dunno.

Sorry to double post but I found this.

http://www.overclock.net/intel-bios/...-r4-moded.html

Can you do that "Control F1" command?

I forgot about the "agp aperature" thats usually on the same page as the timings.
 

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Discussion Starter · #18 ·
Nice! That worked. However, if i set the ram timings to 3-3-3-8 the computer fails to boot...


Duno why it wont let me run it like that...
 

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Quote:


Originally Posted by Neocold

Nice! That worked. However, if i set the ram timings to 3-3-3-8 the computer fails to boot...


Duno why it wont let me run it like that...

How about setting it to the slowest settings then working your way back.

Slowest = 3-4-4-8
 

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Discussion Starter · #20 ·
and how would it be worked back? 3-4-4-8 to 3-4-4-7? sorry, but like i said, never have undersood the ram part of overclocking, even after reading the manuals...

EDIT: I just tried 3-4-4-8 and it wouldnt boot???

EDIT2: Ok, seems it doesnt like 3-x-x-x only 2.5-x-x-x which is weird considering cpu-z says the ram can take it. currently i have it running 2.5-4-4-10 as i understand (could be wrong) 3-4-4-10 is as loose as a P4 can get on ram... so being that i cant run 3-x-x-x 2.5-4-4-10 is as loose as i can get (looser is more stable for ocing right?)
 
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