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Now continuing my 1st time overclocking attempt my AMD64 3800+ (single core) was at 2.71Ghz which was my limit to a stable overclock. Tried 2.75Ghz and it was running my Corsair Value ram a touch higher than it should and caused lock ups as soon as windows loaded up. Now after reading further in the art of overclocking i thought yes my ram will limit my OC, but is it this so early on into my adventure?<br />
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I thought my CPU voltage could be to blame, so i jumped into the Bios and put the CPU voltage up one notch (i'm not an idiot i was very cautious about this). But i made sure i could keep my HTT at a reasonable level of 980 and keep my ram from going beyond it's capabilities. <br />
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Everything is as it was, ram at 333Mhz rather than stock 400Mhz, except i changed the multiplier on the CPU to 11.5 and CPU frequency down a bit to<br />
245Mhz and HT to X4 obviously. And oddly enough it booted into windows without a lockup or BSOD. Now remember i put the voltage up one notch!<br />
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I am now running my AMD64 3800+ @2.82Ghz, although streess testing must be done before i am happy...brb
 

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so your voltage is what around the 1.45 /1.5 vcore range ?<br />
<br />
thats nothing <img src="/images/smilies/smile.gif" border="0" alt="" title="Smile" class="inlineimg" /><br />
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around the 1.6/1.65 vcore is the max for air cooling so youv'e got ages to go.<br />
<br />
nice overclock aswell <img src="/images/smilies/thumb.gif" border="0" alt="" title="Thumb" class="inlineimg" />
 

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Discussion Starter #3
I'm having issues with anything set at X12 cpu multiplier for some reason, get a blank blue screen currently running the CPU at 1.512 Volts. But i'm afraid to go higher even though my temps are fine....what to do?
 

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what temps do you have at the moment ?<br><br>
idle and load<br><br><br>
You will be fine to go higher with the vcore aslong as your load temps ( as in 100% cpu usage ) dont go higher than 55C<br><br>
what speed is your ram running at now ?
 

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Remember that the memory controller is built into AMD 64's so thats probably an explaination of why your ram works at the same speed it did not before.
 

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Discussion Starter #6
At 2.8Ghz idle 36Celcius. Before at 2.75Ghz i used to get BSOD's, so i increased the volts on a whim one notch and it works upto 2.8Ghz. But as soon as i leave the CPU speed the same and DDR the same (set to 333Mhz) and put the CPU multiplier on X12 i get a blank blue screen. All i ever seem to get is lock ups to be honest, if i manage to get to windows it may lock up there or during a stress test like 3DMark05. But at the moment it works fine @ 2.8 during stress tests and is completely stable.
 

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1/2 CPU multiplyer do not effect the RAM, only the CPU. There is a FAQ on that.<br>
Some bumps on the RAM, chip set and Memory controler voltage may help your overall OCing. Keep working it, you have a very good OC going so far <img alt="" class="inlineimg" src="/images/smilies/smile.gif" style="border:0px solid;" title="Smile">
 

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Discussion Starter #8
I'm totally lost! I can't get 2.8Ghz to work without locking up on 3DMark05. I am depressed, what would be the cause of a PC freezing without errors? A lot of guides saying voltage, but no amount of raising the CPU voltage changes a thing. Odd thing is anything in the 2.9Ghz range fails to get into windows, i get a "blank" blue screen appear and freezes.<br />
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All things are set within their boundries so i'm totally gazumped!
 

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so its posting at 2.8?
 

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You could try running your memory at a divider, or just upping your memory voltage. I think corsair ram is good up too 2.8? Dont quote me on that, but thats what my xms is rated up to. Remember though, xms has a heat spreader. Also, lowering your HTT might help, I keep mine around 600, as it doesnt really affect performance that much, and can keep your nb much cooler and under less stress.
 

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Discussion Starter #11
It's posted 2.85Ghz, but usually gives me a blank blue screen and locks up.
 

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<div style="font-style:italic">It's posted 2.85Ghz, but usually gives me a blank blue screen and locks up.</div>

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</div>Have you tried running your ram at a divider in order to rule out the CPU as the cause?
 

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Discussion Starter #13
I running DDR400 at 333Mhz. Tried going lower but makes no difference, although like i said before the system was unstable at 2.75Ghz. I now have managed to boot up into windows at 2.8Ghz by raising the CPU voltage to 1.5volts. But it freezes in 3DMark, what would cause this?
 

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Discussion Starter #14
It seems anything around 2.75Ghz or over is unstable for me, i have settled for 2.7Ghz which is perfectly stable. I am at a loss with making 3Ghz, but with Corsair Value ram, 2.7Ghz is quite a reasonable overclock me thinks.
 

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Just remember that no two componants are the same...just because someone else with an identical rig managed to oc to a certain point doesn't meant you will be able to. That said, I don't see why you aren't able to hit 2.8. (Especially since my 3400 was at 2.6, and was only limited by my stupid psu.)
 

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<div>Originally Posted by <strong>Mhill2029</strong></div>
<div style="font-style:italic;">At 2.8Ghz idle 36Celcius. Before at 2.75Ghz i used to get BSOD's, so i increased the volts on a whim one notch and it works upto 2.8Ghz. But as soon as i leave the CPU speed the same and DDR the same (set to 333Mhz) and put the CPU multiplier on X12 i get a blank blue screen. All i ever seem to get is lock ups to be honest, if i manage to get to windows it may lock up there or during a stress test like 3DMark05. But at the moment it works fine @ 2.8 during stress tests and is completely stable.</div>
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You're using the "shotgun" approach to OCing. Change one thing at a time. That way when something goes unstable you will know what is limiting your OC's.
 

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Discussion Starter #17
Oh btw, on occasions my USB will stop functioning at a certain clock rate, plus do you have to change the PCI Frequency to 33Mhz rather than the default Auto? Plus would a Bios update be worth while?<br><br>
I'm using a Jeantech Artic 600Watt PSU, which is a kick ass premium PSU.
 

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Originally Posted by <strong>Mhill2029</strong>

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<div style="font-style:italic">Oh btw, on occasions my USB will stop functioning at a certain clock rate, plus do you have to change the PCI Frequency to 33Mhz rather than the default Auto? Plus would a Bios update be worth while?<br />
<br />
I'm using a Jeantech Artic 600Watt PSU, which is a kick ass premium PSU.</div>

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</div>USB: Disable "Legacy Support". NB>SB bus speed will affect USB stability.<br />
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Locking the PCI frequency can give you more stability. Do you have any PCI devides installed though?<br />
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Not really a "kick ass premium" PSU:<br />
<a href="http://www.tomshardware.com/2005/07/11/stress_test/page20.html" target="_blank">http://www.tomshardware.com/2005/07/...st/page20.html</a>
 

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remeber if your going over 250mhz on your fsb you need to set your HT Freq to 3x.Having it set higher with a fsb over 250 will cause instability.
 

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You MUST lock the PCI Frequency. If that frequency goes over 37MHz (Where most boards crap out), you can loose data and such from your harddrive.<br />
I've never heard about JeanTech, so that's <i>possibly</i> your problem.<br />
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<div style="font-style:italic">remeber if your going over 250mhz on your fsb you need to set your HT Freq to 3x.Having it set higher with a fsb over 250 will cause instability.</div>

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</div>That is not always correct, most boards can take 1050MHz on the HTT without problems. A few can go up to 1100, and almost none can go higher.
 
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