Help needed with E5200 - can't get higher than 3.15GHz..!?!

jmp_78

jmp_78

jmp_78

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I have an Asus P5PKL-AM motherboard, Dual-Core E5200 CPU, and a Zalman CNPS9700 cooler.

I have increased the FSB to 250MHz and successfully OC'd to 3.15GHz, but 251MHz or higher ends up with Prime95 reporting errors.

If I increase 'VCore Over Voltage' in the BIOS to +50mv, +100mv or +150mv, I still cannot get Prime95 to be error free at 251Mhz FSB.

What the hell am am doing wrong?!? :mad: I was under the impression that this should be a walk in the park even when using stock cooling.

Please help :confused:
 
Some of these E5200's suck but i think it's a vcore problem. Download cpu-z and find out what actual vcore you are running. Saying that, 3Ghz should be ok at stock voltages. Mine does 3.33Ghz with only 1.26v and is'nt a good clocker. It maxxes out at 3.6Ghz with 1.35v.
 
pastymuncher said:
Some of these E5200's suck but i think it's a vcore problem. Download cpu-z and find out what actual vcore you are running.
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I am currently trying again at 251MHz FSB, everything else in BIOS set to AUTO including voltages.

StressPrime 2004 Orthos is running in the background - 6mins in, temps at 51degrees.

With this running, CPU-Z says that my 'Core Voltage' is 1.248v.
 
People have been suggesting that my 800MHz RAM might be an issue - should I try swapping this for 1066MHz?
 
No you don't need to do that, just make sure your RAM is running within spec by altering the RAM Divider. What's your RAM currently running at?

Having said that I had a problem with my brothers Asus P5QL Pro not booting with a particular RAM divider :rolleyes:, it's one I needed too :(. In the end I settled with slightly overclocking the RAM with the higher divider.

I'd generally avoid using auto voltages, better to know where you are ;).

What's your CPU VID?
 
i have 8500 memory but i still can't run it much over 900Mhz with my system clocked. I found that to get over 3.2 GHZ+ (i'm at 3.5 Ghz) i had to reduce my memory frequency to keep the system stable - even though it's capable of higher speeds. Try a low memory frequency just to see what happens.

And, i agree with the above, set your own voltages so you know where you are with your setup/clock at all times. Far easier to identify faults if they occur.
 
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Assimilator1 said:
What's your RAM voltage set to Plec?
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I have mine set at 2.0v even though it's under clocked. But i would have no hesitation in bumping up to 2.3v if it required it, even underclocked - as my memory is designed for those voltages. (It's made to run at 1.8v @ 800Mhz settings and 2.2v @ 1066 settings).

If i was running 6400 memory (800 MHz) i would still be looking in the region of 2.1v if the system required it for stability. (I've found that few makes of 800Mhz memory requires a 0.1v boost to get it stable even @ default.)

Edit: Soz, Assimilator1, i thought you were the original poster - I probably gave you more info than you required. I'll add that i have tried higher voltages to get higher frequecies but it hasn't helped. It seems quite a common barrier even with 8500 memory.
 
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e5200's are very hit and miss, some are very good clockers whilst others are not as good. Have you tried using a higher FSB (say 300) and a lower Multiplier (11 for example) to see if there is any change.

You shouldn't need to use 1066 ram as the high multiplier allows for lower FSB's, i have not used 400 fsb yet and my Ram is running lower than 800mhz always.
 
Assimilator1 said:
Plec
Lol, no probs :)
Wierd that you can't run your RAM at default speeds, have you tried higher NB voltages to see if that will fix it?
Click to expand...

The memory is my next project. I've not touched the NB voltages yet as i wanted to get the system stable with just a combination of the vcore, memory voltage and timings @ 3.5Ghz (my original target was only 3.2Ghz but i read so many posts of chips reaching 4Ghz plus that i thought i was being too conservative...)

I've got a feel for the MB now so hopefully with a combination of the above and now upping the NB and the MCH voltages i'll be able to get closer to 1066. I'm not that hopeful though as i've read a lot of threads where they've had to sacrifice memory frequency to keep their system stable.

I'm not bothered as, obviously, i wont notice the difference - it's more of the challange than anything.
 
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