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Getting my 2500k over 4.8GHz stable, is it possible?

post #1 of 13
Thread Starter 
Yesterday I got some new fans installed in my case. Along with that I put my H100 in Push/Pull. Results were pretty good, dropped about 7 degrees total after everything was said and done. The reason I did this though, was because I wanted lower temps to overclock higher. However, no matter what I tried I could not get my 2500k to clock higher than 4.8GHz ( I can boot in 4.9GHz and 5.0GHz even CPU-Z Validate but can't pass any stress tests eg. LinX / IBT)

I tried 49 multi, 50 multi and every voltage up to 1.5v (haven't tried over 1.5v though) without any luck. Even tried changing the BCLK to 102 and 48 multiplier still without any luck. No matter what I did I got the BSOD 101 error. I just don't see how it's 12 hour Prime stable @ 4.8GHz @ 1.45v but cannot achieve anything higher than that? I thought I would have a little more room to play with. It's nice dropping my temps down, but it's sad that my temps are great but I still cannot achieve a higher clock.

Any recommendations? Perhaps some settings I should try playing with besides just the VCORE even though it's giving me the 101 error?
post #2 of 13
The chips hit a wall, and they just don't want to go past. I'm sure you can get it higher if you really push the voltage, but does the extra 200 MHz really matter? You could try something like 1.55V for 5.0 (although I wouldn't leave it there) and see if it worked. I'm assuming you have Intelnal PLL Overvoltage enabled already? Have you tried playing with the CPU PLL, VCCIO and VCCSA voltages?
post #3 of 13
Thread Starter 
Quote:
Originally Posted by Forceman View Post

The chips hit a wall, and they just don't want to go past. I'm sure you can get it higher if you really push the voltage, but does the extra 200 MHz really matter? You could try something like 1.55V for 5.0 (although I wouldn't leave it there) and see if it worked. I'm assuming you have Intelnal PLL Overvoltage enabled already? Have you tried playing with the CPU PLL, VCCIO and VCCSA voltages?

Well, the extra 200 MHz does and doesn't matter. I really would like to be able to sit at 5.0GHz stable, however I do want it to be a daily clock. I can benchmark at 5.0GHz. Just can't stress test for some reason. I actually haven't tried anything over 1.5v so I'm not sure if it would work, but what worries me is I don't know anyone who runs their Sandy at over 1.5v daily. So even if it took 1.52v before it was stable, I'm worried about obviously degrading the chip at those voltages even though the temps are still great.

I have PLL Enabled @ 1.750, VCCIO @ 1.064 and VCCSA @ .925

I was thinking about playing with them but I always figured you would have to get the voltage situated before these other factors came into play (especially considering that it's the 101 error I'm getting)
Edited by BiG StroOnZ - 12/11/12 at 7:59pm
post #4 of 13
Some people run at 1.5v, I get 1.5v+ running prime and ~1.47 - 1.49 for everyday gaming. You should check out the sandy club to get an idea as to what temps and voltages people have.
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post #5 of 13
Its very understandable to go from 4.8ghz @1.45v to over 1.5v for 4.9ghz even. A lot of chips need a huge boost to get to a higher multi even if its only another 100mhz.
Do as nooboc said and check the spreadsheet in the sandy club.
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post #6 of 13
From recent experience I'd shy away of going near Intels max voltage of 1.52V for longer periods of time. I did it on a 2600K and about 2 months ago it just died on me completely. Temps weren't even that much of an issue at that point as the CPU was under water but apparently it degraded pretty quickly and only survived about 20 months.
Admittedly I've been folding like crazy at the time so that eventually accelerated the process.
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post #7 of 13
Some chips just wont go that high.
I got mine up to 5.0 booting but it wasnt stable until it was at 4.8 with 1.45 ish Vcore but still got some bluescreens every 30ish hours of use..
I dropped to a 100% stable 4.7Ghz at a much more comfortable Vcore and am very happy with it now.

Try out alot of settings and then when you have the stable setting at an acceptable speed just start droppin vcore till you experience errors.
Youll find a perfect OC for yours soon
post #8 of 13
Thread Starter 
Quote:
Originally Posted by nooboc2012 View Post

Some people run at 1.5v, I get 1.5v+ running prime and ~1.47 - 1.49 for everyday gaming. You should check out the sandy club to get an idea as to what temps and voltages people have.

Checked, doesn't seem there is really anyone running over 1.50v.
Quote:
Originally Posted by pc-illiterate View Post

Its very understandable to go from 4.8ghz @1.45v to over 1.5v for 4.9ghz even. A lot of chips need a huge boost to get to a higher multi even if its only another 100mhz.
Do as nooboc said and check the spreadsheet in the sandy club.

Gave it a nice look over. Pretty organized that spreadsheet. There doesn't even seem to be anyone running theirs at 1.5v even. One person at 1.496v however. Seems that most people clocking at 5GHz got a pretty nice chip in that club because they're under 1.5v.
Quote:
Originally Posted by mosi View Post

From recent experience I'd shy away of going near Intels max voltage of 1.52V for longer periods of time. I did it on a 2600K and about 2 months ago it just died on me completely. Temps weren't even that much of an issue at that point as the CPU was under water but apparently it degraded pretty quickly and only survived about 20 months.
Admittedly I've been folding like crazy at the time so that eventually accelerated the process.

20 months is pretty long time, IMO. I mean would extended periods of gaming be considered the equivalent of folding? My temps really dont get that high at all during gaming though. Wondering if I had mine at 1.52v if it would go longer than say 20 months since I don't fold.
Quote:
Originally Posted by ***h4xx View Post

Some chips just wont go that high.
I got mine up to 5.0 booting but it wasnt stable until it was at 4.8 with 1.45 ish Vcore but still got some bluescreens every 30ish hours of use..
I dropped to a 100% stable 4.7Ghz at a much more comfortable Vcore and am very happy with it now.
Try out alot of settings and then when you have the stable setting at an acceptable speed just start droppin vcore till you experience errors.
Youll find a perfect OC for yours soon

I have a perfect OC already. It's 4.8GHz @ 1.45v. It's 12 hours Prime stable. However that's not my issue here, I'm trying to see if I can get to 4.9 or 5.0 successfully and whether or not running at max voltage (1.52v) would be safe or not, considering my temps are still good. I'm perfectly happy with 4.8GHz but I want to go higher. Not just for benchmarking or validation but daily clock.
post #9 of 13
I've gotten to 5.0 before, but it wasn't what I would call stable.

Of course different people different definitions of "stable". For me, unless I can Fold on it 24/7 at 100% load for 4 weeks at a time without having an error or rebooting, I don't consider it to be a "stable" overclock. Others might not be so strict.

Personally, I'd rather take a couple hundred MHz hit, run cooler, have a lower voltage setting, and not have strange errors and reboots than wave my eP33n that high for more than a screen shot.
post #10 of 13
Quote:
Originally Posted by BiG StroOnZ View Post

I have a perfect OC already. It's 4.8GHz @ 1.45v. It's 12 hours Prime stable. However that's not my issue here, I'm trying to see if I can get to 4.9 or 5.0 successfully and whether or not running at max voltage (1.52v) would be safe or not, considering my temps are still good. I'm perfectly happy with 4.8GHz but I want to go higher. Not just for benchmarking or validation but daily clock.

Define safe. It is going to cause increased degradation in the chip, no question, but it's really anyone's guess on how muh of an impact that'll have. It could be fine for years running at that voltage, or it could start degrading in just a year or so. I haven't seen any controlled studies on the issue, so pretty much everyone is just making reasonable assumptions. If your temps are in control and you are willing to risk the chip dying prematurely, then go for it - but unfortunately I don't think your going to be able to get a hard and fast answer.
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