- Joined
- Mar 7, 2008
This is an odd one I've been dealing with since building my current main system: Asus VIII Hero, 6700k, currently G.SKill Ripjaws V 3200C16 2x8GB.
I do a lot of prime finding projects, which may be compared to running Prime95 large FFT option. It never gives errors if I do tasks equivalent to small FFT option, which would not significantly involve the ram system. In the early days I had all sorts of compute stability problems, but between bios updates and changing the ram, it seemed to have gone away. Before that, I was running G.Skill RJ4 3333 and the best I got that was one detectable error in 3 months, which is still higher than zero errors ever on other systems. Note these tasks are significantly affected by ram speed, hence my hesitation to drop it if possible.
Recently, I got another detected error, and I'm kinda wondering what to try next. The giving up solution would just be underclock the CPU and ram a bit and call it a day. Instead, I have decided to increase Vcore slightly, from 1.250 set, to 1.275 set. My reasoning for this is that my other two Skylake-K systems I've found also need 1.25V set for stability at 4.2 GHz, just like this one. The difference is... the Asus mobo seems to have higher voltage droop under load. I've not made use of load line stuff, and under load it was dropping well below 1.200. Again, I've not had any stability problems with small tasks, only bigger ones. Does CPU Vcore in any way affect stability of the memory system? Note I say memory system, as it could include everything from the IMC to the ram itself.
I've also updated the mobo bios as I was a few versions behind, and at least two of the ones I missed say "improved system stability".
For indication, I was running the type of work which got an error for about 4 days before it happened. Historically we're dealing with very low error rates, from about one a week to one a quarter. I still believe it should be exactly zero.
I do a lot of prime finding projects, which may be compared to running Prime95 large FFT option. It never gives errors if I do tasks equivalent to small FFT option, which would not significantly involve the ram system. In the early days I had all sorts of compute stability problems, but between bios updates and changing the ram, it seemed to have gone away. Before that, I was running G.Skill RJ4 3333 and the best I got that was one detectable error in 3 months, which is still higher than zero errors ever on other systems. Note these tasks are significantly affected by ram speed, hence my hesitation to drop it if possible.
Recently, I got another detected error, and I'm kinda wondering what to try next. The giving up solution would just be underclock the CPU and ram a bit and call it a day. Instead, I have decided to increase Vcore slightly, from 1.250 set, to 1.275 set. My reasoning for this is that my other two Skylake-K systems I've found also need 1.25V set for stability at 4.2 GHz, just like this one. The difference is... the Asus mobo seems to have higher voltage droop under load. I've not made use of load line stuff, and under load it was dropping well below 1.200. Again, I've not had any stability problems with small tasks, only bigger ones. Does CPU Vcore in any way affect stability of the memory system? Note I say memory system, as it could include everything from the IMC to the ram itself.
I've also updated the mobo bios as I was a few versions behind, and at least two of the ones I missed say "improved system stability".
For indication, I was running the type of work which got an error for about 4 days before it happened. Historically we're dealing with very low error rates, from about one a week to one a quarter. I still believe it should be exactly zero.