Was running my p4 1.6a@2.4@1.7v on Epox 4g4a mobo using Corsair XMS 2700 512mb ram@Turbo settings. Upgraded INF drivers and all. It ran fine for months until today 3dmark froze up. Is this normal for an oc to all of a sudden turn bad?
p4 1.6a doesn't like my oc anymore?
- Thread starter react
- Start date
you may be experiencing SNDS(sudden northwood death syndrome) due to high voltages. i wouldn't go above 1.65v with a Northy.
try backing down your voltage......i hope it resolves your problem
try backing down your voltage......i hope it resolves your problem
its now running at 1.65 and so far its stable 
Sould I try to gradually bring it up to 2.4ghz again?
Sould I try to gradually bring it up to 2.4ghz again?Originally posted by: react
its now running at 1.65 and so far its stable
if you can get it to be stable
mines been stable for a year now at 2340 with 1.65V. can't imagine that your cpu is going out at 1.7V...probably some other explanation.
don't despair, 2300 is still a great oc.
don't despair, 2300 is still a great oc.
Yea they've gotten higher. I think its due to heat also because I upped the voltage on my AGP and RAM. Looks like it'll only do 1350 now at 1.65v
Damn I'm pushing 1.85v to my p4 1.8a northwood to get it to 2.4 stably. I'm afraid of the summer temps! I need a new heatsink fast!
You guys are kinda overdoing the voltage imo, I wouldn't really go over 10-15% of the default voltage. I'm running my p4 1.6a @ 2.7 ghz with +.75 volts, but I guess it all depends on each individual cpu. The problem here is the 1.7 voltage creates way too much heat and now that it's spring it's become more obvious
hm I don't wanna risk my p4 dying.. I think i'll try to lower the voltage a bit more to 1.625v. I think my mobo undervolts by .050v because when I boot up, it says its running at 1.6v.
Edit: Well lowering the vcore to 1.625v and it seems to be stable @ 2335ghz. I'm happy with this as the temps are much lower than before (53 full load @ 1.7v(1.65 shown during bootup) before). My vcore is also shown as 1.575v during the bootup.
Edit: Well lowering the vcore to 1.625v and it seems to be stable @ 2335ghz. I'm happy with this as the temps are much lower than before (53 full load @ 1.7v(1.65 shown during bootup) before). My vcore is also shown as 1.575v during the bootup.
Have you been ocing the ram as well??? The last guy who thought he had stability issues and IE SNDS turned out bad ram was the reason for all the instability and BSOD for him...
I ran my 1.6a at 2.74f=ghz w/ 1.7v for 9-10 months through hottest portion of summer and the chip is still runnig at high speed today for another ATer...
I ran my 1.6a at 2.74f=ghz w/ 1.7v for 9-10 months through hottest portion of summer and the chip is still runnig at high speed today for another ATer...
- Aug 22, 2001
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looks like it'll do this speed at default voltage
So I guess I raised it to 1.7 just to do 70 more mhz (wouldnt go any higher than 2.4 at 1.7v before)
So I guess I raised it to 1.7 just to do 70 more mhz
(wouldnt go any higher than 2.4 at 1.7v before)what's ur cpu temp and ambient temp?
have u clean out the heatsink fan? dust can build up and prevent good air flows to your cpu.
have u clean out the heatsink fan? dust can build up and prevent good air flows to your cpu.
TimeKeeper
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- Nov 3, 1999
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seems like you just got a new video card?
It could be as easy as to uninstall 3dmark. or uninstall your old video driver properly?
Or maybe your new video card suck too much from your psu?
Just guessing
CPU's slow down with time when run for extended periods at elevated voltages and (to a lesser extent) temperatures. It's an effect called hot-electron gate impact ionization - AKA "hot-E". The "hot" does not refer to temperature but refers to the energy levels of the electrons.
It's a pretty esoteric subject, but for on-the-side reading, google "hot electron gate degradation", or something similar. It will turn up things like this.
The summary though is that CPU's slow down with time. Increasing the voltage increases the effect substantially. Increased temperatures also have an effect. One of the reasons why CPU's overclock is that manufacturers set aside "slowing down" margin for the CPU's.
It's a pretty esoteric subject, but for on-the-side reading, google "hot electron gate degradation", or something similar. It will turn up things like this.
The summary though is that CPU's slow down with time. Increasing the voltage increases the effect substantially. Increased temperatures also have an effect. One of the reasons why CPU's overclock is that manufacturers set aside "slowing down" margin for the CPU's.
I have a feeling this cpu is gonna die on my in a few months.. its down to 2.24 now hopefully it'll stay. This was after 24 hr prime stress test in the background at 2.3 too. Stupid ati control panel made me error a few times till I uninstalled
the more you stress test it using voltage ~ the more you will kill the chip. (its obviously already damaged)
revert to default vcore if ya want it to live more then a few more weeks
revert to default vcore if ya want it to live more then a few more weeks
There are those "diminishing returns" that I saw with SNDS.....
POssibly a good note for you is when my 1.8@2.52ghz w/ 1.83 started dropping on me it eventually found stability at 2.25ghz for 10 weeks with no more then 1.58v and it wouldn't error and ran just fine....If you drop it to default speed or just a small oc it could last quite awhile, but the key is to keep the vcore down.
I couldn't run 1.8 w/ 1.63v of vcore but ran it at 1.5v just fine. It wouldn't run 2.25ghz w/ 1.63v but ran OK with 1.58v....vcore sensitivity....mobo and power suply in the futre worked perfectly when I got my 1.6a that did 2.74ghz w/ 1.71v.
POssibly a good note for you is when my 1.8@2.52ghz w/ 1.83 started dropping on me it eventually found stability at 2.25ghz for 10 weeks with no more then 1.58v and it wouldn't error and ran just fine....If you drop it to default speed or just a small oc it could last quite awhile, but the key is to keep the vcore down.
I couldn't run 1.8 w/ 1.63v of vcore but ran it at 1.5v just fine. It wouldn't run 2.25ghz w/ 1.63v but ran OK with 1.58v....vcore sensitivity....mobo and power suply in the futre worked perfectly when I got my 1.6a that did 2.74ghz w/ 1.71v.
Best is to keep your CPU at lover Voltage as you can becouse you may have problems with high Voltage in future like you. CPU can damage higher Voltage, some CPU's are not so hard made and may be damaged with more V.
I keep my P4 2.4 at default Voltage 1.525 on 3060 MHz and can more but I don't want to push up for few megahertz becouse must set higher Voltage which can damage CPU.
Better find good CPU which can run 165-170 at default V.
I keep my P4 2.4 at default Voltage 1.525 on 3060 MHz and can more but I don't want to push up for few megahertz becouse must set higher Voltage which can damage CPU.
Better find good CPU which can run 165-170 at default V.
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