Quote:
Originally Posted by juano;15281520
It did pass like 8 hours of prime blend max RAM usage and ~30 minutes of each of the two recommended FTTs at these settings. I have read the OP of the solving 124 BSOD post, that's why I mentioned that I rolled my GPU drivers back from the latest beta ones that have been reported to cause 124 BSODs.
Well, I can't say much about the GPU driver's as I have not personally used them. In regards to Prime testing I would say , you should really run it a little longer, especially because you do folding.
Quote:
Originally Posted by juano;15281520
Also as I mentioned I know to try starting low and increasing the PLL should this BSOD happen again. What I was really asking was two things, first would I want to also try lowering the VCCIO as a possible solution for 124 BSOD or would increasing it be much more likely?
Default VCCIO is around 1.05/1.07 I believe, VTT and QPI is the VCCIO setting for sandybridge, that is why Bsod 124 can be related to VCCIO. Increasing it does help stability, but if you reach a certain point, it'll just become unstable. It is either st on auto or increased, not usually lowered form it's stock setting.
Quote:
Originally Posted by juano;15281520
Also expected or common values that these two would be need to be changed to would be appreciated. As I understand it 1.1v is the default and 1.2v is the max for VCCIO but have you noticed a trend in most people solving 124 at 1.15 or 1.05.
Unfortunatly I can't really say, I've been through hundred of overclocks and can't really remember, however there is one thing that does come to mind regarding vccio. Usually when you're overclocking ram going above 1.1v can help, but between stock VCCIO and 1.1v it can help general stability, but remember increasing it too much will more than likely cause you instability and generate the same heat that vcore would. People think that using vcccio is a substitute for vcore, unfortunatly I don't see it that way.
Increasing VCCIO (Vtt) helps when you start to strain the IMC of the chip, when using high RAM usage in prime95 etc (instability) therefore a small boost to the vccio can help with that stability providing that you have cooling in the first place to maintain your cpu's temperature.
Hope that makes sense.
Quote:
Originally Posted by juano;15281520
Past answers to those two questions and reading the entire "fixing 124 BSOD" thread ( I already read the 2500k OC help thread and the OP of fixing 124) is there anything else I ought to know to try before increasing vcore should this BSOD happen again?
124 is a little tricky as you have gathered, turning that error code into something else can actually be done just by the VTT and PLL voltage alone, even if you get it to 101 atleast you know that's it's vcore that you need, or an error code showing OS corruption etc.
What I would advise is that you run the Hard FFT's for around 1 hour each and see how far you get, if you get the infamous 124, then I wuld recommend that you start with the PLL votlage, reduce it all the way to 1.5v and start again with the FFT's, keep on doing until you find one value (sweetspot) that nets you the most duration in prime and note that down, then take it back to PLL back to auto and do the same for the VCCIO, obviously use the smallest increments as possible and test with prime blend.
Hopefully when you find a sweet spot for both (could be PLL voltage at 1.6125v and VCCIO on auto or PLL voltage at 1.6875v and VCCIO on 1.095v)
You can combine them together and retest with prime and see what happens. It is a very tedious process and one that requires a lot of patience.
Hope that helps
Quote:
Originally Posted by
chalamah;15274110
munaim1,
I have a question regarding the help you gave someone in this post
http://www.overclock.net/intel-cpus/1125843-2500k-overclocking-help-5.html
When you worked out the sweet spot for VTT and PLL @ a 47 multiplier, does that sweet spot only apply for that multiplier or would it be the same for say a 49 or 50 multiplier?
To be perfectly honest, I really don't know. Because the proess can be tedious, I didn't really test it with a different mulitplier, it just depends on how it reacts to that particular overclock, so on that note I would say probably not, the vtt and pll sweet spot is probably depedndant on that particular multiplier. Sorry I cannot give you a exact answer to that question.
EDIT Just to add to what I said above and after a little bit of thinking lol
:
Actually, I can maybe try and explain this to the best of my ability, lets just say that between 4.5 to 4.8 you recieve bsod 101 after tweaking the vtt and pll for 4.5ghz, so at that point you would obivously continue increasing the vcore until you're stable, however they may be a point during that time that the 124 may arise, that doesn't mean that the vtt and pll sweet spot has changed and it needs to be tweaked again, because remember 124 can also be vcore, so on that note you continue increasing the vcore until you reach a point of stabiity, however that trully depends on the potential of that particular chip. But and this is important, overclocking is not a guarentee, so in order to 'find' your overclock you will need to set yourself a target and that should be by vcore and temp, not clock speed that will allow you to really see the potential of that chip under those conditions.
If you read about VTT just above (explained to Juano), I would say it doesn't really need to be changed once you find the sweet spot, as the IMC won't be stressed unless you really start pumping insane voltages and overclocking the RAM, so that just leaves the PLL voltage. Recent findings have suggested that lowering PLL voltage can help, however that is not universal amongst every motherboard, so whether or not that dependant on clock speed or the motherboard I really don't know, but I I would say motherboard. So to conlude, I would say I retract what I said before about maybe having to change the vtt and pll for higher multi's because imho the pll is tied to the motherboard and the vtt doesn't really have to change, therefore it just leave's the vcore. But again that is what think and I have gathered so far. I might be wrong lol