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[Official] The Sandy Stable Club **Guides, Voltages, Temps & BIOS Templates** Inc SPREADSHEET - Page 529

post #5281 of 10702
Quote:
Originally Posted by munaim1 View Post
Run a memtest and check HDD for error's. Also check the link in my sig, Freezing / BSOD 124 on sandy for a few tips
Well ran an error check on my boot drive and fell asleep with memtest on so it ran for 12 hours with no errors. Looks like its back to tweaking, Im still stumped on how it could test stable and be stable folding for a week and then just simply not boot at the same settings at the next restart.
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post #5282 of 10702
Is there any tips or tricks with getting temps down without raising vcore voltage? Like adjusting ram/etc? I'm hitting 80c at maximum stress on Intel burn test on an Asrock z68 extreme 4 gen 3 board and a noctua 14. Would like to find some tweaks without losing processor speed! Thanks
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post #5283 of 10702
Quote:
Originally Posted by stephenk View Post
Is there any tips or tricks with getting temps down without raising vcore voltage? Like adjusting ram/etc? I'm hitting 80c at maximum stress on Intel burn test on an Asrock z68 extreme 4 gen 3 board and a noctua 14. Would like to find some tweaks without losing processor speed! Thanks
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better cooling is your only option at this point.
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post #5284 of 10702
Hello all. I just picked up a 2500k for gaming on Thursday and I've been working on an OC. My current 4.8GHz is stable (prime95 1344 + 1792 1hr, blend 1hr, F@H 36hr.). However, the voltages required make me a little nervous, especially seeing lots of folks getting 4.8GHz on a lot less. I am using 1.45 vCore (1.43V after Vdroop) and 1.89V on the PLL right now. I hit 75C in the most demanding stress tests, 60C for F@H.

What seems most unusual is my PLL voltage. I thought I was almost stable at 1.42 vCore 1.7V PLL, but I got stopped workers. I then I lowered the PLL voltage to 1.6 - same thing. A PLL voltage of 1.55V gave me BSOD 101 errors so I thought I needed more vCore. I kept going up by 0.01V until I hit 1.45 vCore and I didn't want to go higher than that. I kept the PLL voltage at 1.6V and still got stopped workers in prime95. At 1.6V PLL or below, I needed to enable "PLL overvoltage" to boot.

After everything I read, I thought lower PLL voltage was more stable, but I thought I'd give a higher PLL voltage a try. I set it to 1.89V and everything has been stable since. It is strange that my chip needs more than 1.8V PLL to be stable at these clocks while others are running better with much less?

Now that the system is stable and it seems that more PLL voltage is needed for my chip, I bet I can reduce the vCore and I will try that next. Do you have any recommendations? Thanks.
post #5285 of 10702
Thread Starter 
Quote:
Originally Posted by pelayostyle View Post
can you please update my submission, thanks.
Done. Thanks bud


Quote:
Originally Posted by silvrr View Post
Well ran an error check on my boot drive and fell asleep with memtest on so it ran for 12 hours with no errors. Looks like its back to tweaking, Im still stumped on how it could test stable and be stable folding for a week and then just simply not boot at the same settings at the next restart.
Well I'm not sure what it could be, try the reading the OP of the "BSOD 124 / Freezing on Sandy" thread, link is in sig. Are you sure you didn't change anything in the BIOS prior to this 'issue' that you're having?



Quote:
Originally Posted by stephenk View Post
Is there any tips or tricks with getting temps down without raising vcore voltage? Like adjusting ram/etc? I'm hitting 80c at maximum stress on Intel burn test on an Asrock z68 extreme 4 gen 3 board and a noctua 14. Would like to find some tweaks without losing processor speed! Thanks
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Could you please fill in your system spec via the User CP link above. Also why are you using IBT? Check out the OP for more info.
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post #5286 of 10702
Quote:
Originally Posted by stephenk View Post
Is there any tips or tricks with getting temps down without raising vcore voltage? Like adjusting ram/etc? I'm hitting 80c at maximum stress on Intel burn test on an Asrock z68 extreme 4 gen 3 board and a noctua 14. Would like to find some tweaks without losing processor speed
I'm surprised by those temps with your cooler. First, do you have good case air flow? Make sure you have good cable management and that air is flowing in and out smoothly. I have a worse cooler than you, a higher OC, and using more voltage - and my temps don't get that high. But I do have an excellent case and air flow.

Also, what TIM are you using and did you apply it properly? It might be worth re-seating the HSF to be sure. You don't want air bubbles.

Lastly, I read that many have had success in reducing their PLL voltage to as low as 1.45V without sacrificing stability. My chip seems to like more PLL voltage, but if it works for you, that might help.
post #5287 of 10702
Thread Starter 
Quote:
Originally Posted by klaxian View Post
Hello all. I just picked up a 2500k for gaming on Thursday and I've been working on an OC. My current 4.8GHz is stable (prime95 1344 + 1792 1hr, blend 1hr, F@H 36hr.). However, the voltages required make me a little nervous, especially seeing lots of folks getting 4.8GHz on a lot less. I am using 1.45 vCore (1.43V after Vdroop) and 1.89V on the PLL right now. I hit 75C in the most demanding stress tests, 60C for F@H.

What seems most unusual is my PLL voltage. I thought I was almost stable at 1.42 vCore 1.7V PLL, but I got stopped workers. I then I lowered the PLL voltage to 1.6 - same thing. A PLL voltage of 1.55V gave me BSOD 101 errors so I thought I needed more vCore. I kept going up by 0.01V until I hit 1.45 vCore and I didn't want to go higher than that. I kept the PLL voltage at 1.6V and still got stopped workers in prime95. At 1.6V PLL or below, I needed to enable "PLL overvoltage" to boot.

After everything I read, I thought lower PLL voltage was more stable, but I thought I'd give a higher PLL voltage a try. I set it to 1.89V and everything has been stable since. It is strange that my chip needs more than 1.8V PLL to be stable at these clocks while others are running better with much less?

Now that the system is stable and it seems that more PLL voltage is needed for my chip, I bet I can reduce the vCore and I will try that next. Do you have any recommendations? Thanks.
Did you run a 12hour blend test?

It's quite strange because I have seen hundreds of SB overclock's with Asus Mobo's and it does help when you lower PLL voltage, I really don't know. Did you check in small increments from 1.5v?

PLL overvoltage has nothing to do with the actual PLL voltage, the overvotlage just helps a multi boot to windows if it cannot.

It is strange but It's also possible. I would definitely do a retest using small increments as I'm currently doing the same with my new chip:

Quote:
Originally Posted by munaim1 View Post
I found the best time to tweak those votlages is when I worker fails or you get a bsod 124 and nearing stability.

I'm currently doing the same for my new chip, it's crap compared to my old one but atleast it does 5ghz even though it takes 1.44v to get there.

Using Custom Prime blend 1344 first, here's my PLL and VCCIO testing method:

Offset 0.090+ 1.424 LOAD

PLL Auto (1.806v)
VCCIO Auto (1.058-1.072) - 1min 10s Prime froze.


Now lets see what the PLL voltage and VCCIO can do:

First PLL:
1.50000v - 44sec BSOD 124
1.50625v - 49sec Worker failed
1.51250v - 46sec Worker failed


Offset 0.095+ 1.432 LOAD
Back to PLL:
1.52500v - 45sec BSOD 124
1.53125v - 41sec Worker failed
1.53750v - 1min 02sec BSOD 124
1.54375v - 47sec BSOD 124
1.55000v - 53sec Prime froze then BSOD 9C
1.55620v - 1min 02sec BSOD 124
1.56250v - 58sec Worker failed
1.56875v - 47sec BSOD 124

Offset 0.100+ 1.440 LOAD
Again continuing with PLL:
1.56875v - 1min 17sec BSOD 124
1.57500v - 55sec BSOD 124
1.58125v - 50sec Worker Failed
1.58750v - 12min 39sec BSOD 101
1.59375v - 1min 02sec Worker Failed
1.60000v - 9min 52sec Worker Failed
1.60625v - 53sec Worker Failed

That's where I'm currently at but as you can see, even after I increased the vcore few times it wasn't making a difference but with the right PLL prime does last a lot longer compared to the other values. I managed to get over 10mins with 1.58750v where nearly all of them where below a minute. I might just keep it there and mess around with the vccio.

I think I'll update this as I go along. Hopefully I get this chip stable at 5ghz with less than 1.45v.
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post #5288 of 10702
@munaim1
Thanks for the input. I'm currently trying to find the lowest PLL voltage that is stable and then I will try to lower the vCore. Here is what I have so far.

At x48 multiplier:
  • 1.45 vCore, 1.89 vPLL - stable
  • 1.44 vCore, 1.89 vPLL - BSOD 101
  • 1.445 vCore, 1.89 vPLL - BSOD 101
  • 1.45 vCore, 1.7 vPLL - BSOD 101
  • 1.45 vCore, 1.6 vPLL - unstable
  • 1.45 vCore, Auto vPLL (1.8V) - passed 20 mins prime 95 1344 (this is good enough for now as I'm trying to find the lowest stable voltage. Others were BSOD after a few minutes.)
  • 1.45 vCore, 1.75 vPLL - BSOD 101
  • 1.45 vCore, 1.775 vPLL - BSOD 101
  • 1.45 vCore, 1.79375 vPLL - BSOD 101
  • 1.45 vCore, 1.8 vPLL (retest) - BSOD 101
  • 1.45 vCore, 1.825 vPLL - BSOD 101
  • 1.45 vCore, 1.85 vPLL - worker failed after 30 mins
  • 1.45 vCore, 1.8625 vPLL - worker failed
  • 1.45 vCore, 1.875 vPLL - BSOD 101
  • 1.45 vCore, 1.89375 vPLL - worker failed - looks like this wasn't stable after all (with all those BSOD 101s, it was probably too low vCore, not PLL voltage to blame)
  • 1.44 vCore, 1.8 vPLL (auto) - starting over with x47 multiplier

Edited by klaxian - 11/5/11 at 12:23pm
post #5289 of 10702
Thread Starter 
Quote:
Originally Posted by klaxian View Post
@munaim1
Thanks for the input. I'm currently trying to find the lowest PLL voltage that is stable and then I will try to lower the vCore. Here is what I have so far:
  • 1.45 vCore, 1.89 vPLL - stable
  • 1.44 vCore, 1.89 vPLL - BSOD 101
  • 1.445 vCore, 1.89 vPLL - BSOD 101
  • 1.45 vCore, 1.7 vPLL - BSOD 101
  • 1.45 vCore, 1.6 vPLL - unstable
  • 1.45 vCore, Auto vPLL (1.8V) - testing...

Maybe I can and should go lower than 1.8V, but perhaps I went too low.
Looks good, keep it up, the work you put it will pay off in the end and then you won't have any tweaking left lol

Yeah why not, the 1.7v region seems to work a lot for people but like I mentioned work in small increments as possible, it requires a lot of patience and can get a little tedious. I still have to continue with my testing at the oment I'm at 1.60625v PLL, so far 1.58750v made the big difference but we'll see if a higher PLL that that can get me better results without increasing the vcore.

Keep up the good work and make sure you note things down, a pen and paper can go a long way!!!
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post #5290 of 10702
Thanks. I'm working at it, but so far it's looking like my chip likes lots of PLL voltage. Is there something that I might be missing that would cause it to need so much? I will edit my above post with results so that I don't clutter the thread. Hopefully it will help someone else in a similar situation
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