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A64 3000 OC giving me trouble...

fustercluck

fustercluck

Diamond Member
I overclocked my A64 3000 to 2.4 ghz when i got it a couple of weeks ago, but in the last day or so it hasn't been able to bootup at 2.4 ghz, only 2.3 ghz. The weird thing is it ran totally fine without any problems for 2 weeks, while it was at 2.4 ghz. Why would it suddenly not want to boot at 2400? It just gets to the XP loading screen and the loading bar is animated as if it's loading, but it's not loading at all, and it won't boot up to my desktop. It should be able to run at 2400...i don't get it, has this ever happened to anyone else?

The temps and voltages are fine. Nothing has changed in the settings since i had it running at 2400. I'm confused 😕
 
Used Sisoft Sandra and Prime95, not for too long because the heat would get pretty high (my heatsink sucks).
 
...re-overclock. Either your room temps changed, dust is building up in case, or it was never prime stable at 2400 in the first place, or bios got fubard, or lots of other things. CPU's don't all of a sudden loose thier ability to OC unless they die then it's dead obviously///

Maybe just get latest bios or latest tweaked one, clean out your case again, go though bios settings and re-overclcok.
 
Even at 2.4ghz it booted up at 39c, but max load was 55c, think it's still the same, so i don't think temps are much of a factor. Anyhow, i'm running at 2.3ghz now with no problems, maybe it a couple of weeks i won't be able to bootup at 2.3 either :x
 
Here's a little update, i need some help...but can't seem to get any :/

My previous PSU died on me and i ended up buying a new one, now my rails look better, and there are no problems with it yet.

Unfortunately i can't hit 2.4 ghz, like i could before at 1.65 voltage. Now i need 1.65 voltage to boot at 2.3 ghz. It's a bummer because a week before my PSU died i was booting at 2.4 ghz just fine, and ran it like that for a while. So why would it suddenly not be able to hit 2.4 ghz? If i set it to 2.4 it just gets stuck at the XP loading screen like all my failed OC attempts (does that happen for others using XP and overclocking?) Anything i can do?
 
What type of PSU did you replace, and what type is the new PSU?


What are the 12v rails rated at on each PSU ? List all the rail ratings if you can.

You may have a weaker/cheaper 12v rail in the new PSU, and needed to up the cpu voltage in order to mitigate the falky/unstable 12v rail. But it still may not be providing enough stable current in order to get you back to 2.4.


no all PSU are created equally


 
The symptoms you describe make the possibility of physical damage due to overvolting a real one. Some early P4 NW overclockers experienced similar symptoms of reduced overclocks that required the same or greater voltage to maintain stability. It isn't the most probable senario but it is possible that is why your overclock on the same voltage is down.
 
overvolting a real one?

I had an Antec 350W PSU, replaced it with an Enermax Noisetaker 420w PSU, with dual 12v rails. Only things to note is that my 12v is 11.77-11.9, and my 3.3 is 3.16-1.18, which is a good deal better than the Antec rails. Everything else is fine. Anything else i can do? Seems like it should still be able to run at 2.4 ghz, i had zero problems at 2.4 ghz previously. Though in the last week or so the 350w was alive, it wouldnt run at 2.4 ghz either.
 
It still might be a heat issue. You said it yourself that your heatsink sucks, and the temps you are reading might not be 100% accurate.

But yeah, definitely check out that new PSU. If it doesn't have a stable 12V rail (or one with low amperage), it could fluctuate too low and prevent processor stability. Also don't know which Corsairs you have, that might be a problem too, and you should definitely run memtest.
 
Ya most likely is ur heat issues. U have to run prime95 for 6+ hrs to ensure its stability. If u cant even boot up window, that must be ur system was never stable at 2.4. PSU is nto the problem here. Oh try to loose ur ram's timing too.
 
I did recently flash to the latest beta bios from DFI, most people say it works well though, don't think it would give me trouble overclocking. I may try to flash back to the previous one, but i don't think it will help.
 
Originally posted by: Zebo
...re-overclock. Either your room temps changed, dust is building up in case, or it was never prime stable at 2400 in the first place, or bios got fubard, or lots of other things. CPU's don't all of a sudden loose thier ability to OC unless they die then it's dead obviously///

Maybe just get latest bios or latest tweaked one, clean out your case again, go though bios settings and re-overclcok.
Click to expand...

that's not true. excessive heat/voltage can slowly break down internal circuits over time, yeilding poorer overclocks. as circuits degrade due to heat and/or overvoltage, it can increase the electrical "noise" between circuits, making it more senstive to changes from overclocking and yielding poorer results.

to the OP, while 2 weeks would seem to short for the above scenario, it's quite possible you were at the "edge" of stability before, and it simply won't overclock as much as it did before.

 
Originally posted by: CaiNaM
Originally posted by: Zebo
...re-overclock. Either your room temps changed, dust is building up in case, or it was never prime stable at 2400 in the first place, or bios got fubard, or lots of other things. CPU's don't all of a sudden loose thier ability to OC unless they die then it's dead obviously///

Maybe just get latest bios or latest tweaked one, clean out your case again, go though bios settings and re-overclcok.
Click to expand...

that's not true. excessive heat/voltage can slowly break down internal circuits over time, yeilding poorer overclocks. as circuits degrade due to heat and/or overvoltage, it can increase the electrical "noise" between circuits, making it more senstive to changes from overclocking and yielding poorer results.

to the OP, while 2 weeks would seem to short for the above scenario, it's quite possible you were at the "edge" of stability before, and it simply won't overclock as much as it did before.
Click to expand...


yup the extra voltage eats the cpu slowly.
 
Hrm, now 2 days later it's booting up fine now at 2.4 😵 - This thing is shifty, hope it stays like this though 😛, thanks for replies.
 
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