Originally Posted by The Pook
The ports are on the motherboard but you've literally replaced/tested every component except the motherboard and don't know what the issue is?
unless some other part that you tested was replaced with another faulty part, it's gonna be your motherboard. it could be a RAM training problem - but by trying a different BIOS and by trying different RAM should
have ruled that out.
Intermittent CPU issues are pretty rare ... they usually work or don't work and I can't imagine it causing an intermittent boot issue like that.
Well that's just the thing, if it is the board why would booting be intermittent but the system be otherwise stable? Something in the boot up process is causing it to get stuck and I just can't make sense of it. I do certainly think the board is the issue though, hence why I've posted here. I guess I'm hoping someone knows what's going on and some way to fix it.
You might be on to something with the RAM, I've given an incomplete story as to now. d7 isn't the only code, just the most common. The other one is ram related, 6A. It will stop on 6A after multiple failed boots and then after clearing cmos or resetting again it will go back to d7.
I have 2 different 4 dimm sets since I save the old ram when I upgraded the systems memory 2 years ago.
4x8gb and 4x4gb.
I've tried 2 dimms at a time of each set today while troubleshooting and no difference.
I don't think its the ram itself though because the old set had no issues when pulled (tho I never ran memtest on it and don't have another compatible system to do it in atm)
Originally Posted by 8051
Do you have the latest BIOS? I believe when the Asrock X79 Extreme series first came out the BIOS didn't support Ivy Bridge E, only Sandy Bridge E. R U using Ivy Bridge E?
Yes, current bios, and reflashed it after the issue started to see if that would resolve it -- no luck.
It is Sandy, 3930k. System has had same CPU and MB for years. I don't recall any hardware changes before this issue began other than changing the GPU.
It had a 1070 in it that I moved to a new build and replaced with a gtx 730 from an old htpc. It didn't have the issue right after swapping cards though or I would have noticed that. It just seemingly started randomly after a windows update about 6 months ago. I've tried the 1070 in the mb and tried each of the top 3 pcie slots on the board.
The 730 and 1070 work fine in my other systems.
I do kind of suspect it has something to do with the PCIE slots and not the keyboard/mouse inputs but that's just a hunch with nothing to substantiate it. It just seems like it won't display picture, until it does. Today was the longest I've spent troubleshooting without being able to get it to post.
I ripped the system down multiple times to just the MB and tried everything I could think of.
I wouldn't be surprised if it was something silly like a faulty cmos battery (I tried swapping it with one from another system so thats not it either).
I'd let it go and move on if the board just didn't work but when it's running there aren't any problems I can find.