Originally Posted by Sea Monkey
Tried some of the quick settings in the Gigabyte Z97 OC thread with no luck. Still hard crashes pretty quickly at anything above 2133.
Well, take it easy, take it slow. If you want to mess with memory on Haswell, you're getting in pretty deep waters. Not because it's advanced or anything, but because Haswell's propensity to bull**** is unmatched as you can see in my post and that of TwilightRavens.
So, first off, change one thing at a time. Not juts because it's good practice to change things gradually so that you know what helps and what doesn't, but also because one thing may help stability and another may hinder it, getting you back to square one. Before you do anything else, do you have HWiNFO64 installed? If not, install it and check what your system agent and IO voltages are (VCCIO-A, VCCIO-D and VCCSA for me). Also, what's your input voltage and your cache voltage? RAM voltage? Timings? Could very well be that the damn thing is trying to boot 2400MHz with 2133MHz secondary and tertiary timings, which would be no good, so you may need to mess with those too. And if you do, you're really in deep waters.
Originally Posted by TwilightRavens
I had a similar thing like that except with RAM and not core clock. When I originally built the system I bought 4 x 8GB of Corsair Vengeance 2400MHz, and it would run at that with all 4 sticks, one day something happened (I forgot what exactly) and it would no longer work at 2400MHz. So I ran it at 2000MHz for a good two years, a few weeks ago I started messing around with settings to try and I think it was up my cache to 4.1GHz (I didn’t, but I was trying) and set the BCLK:RAM ratio to 100:100 instead of Auto, I set my timings and speed on my RAM to 2400 11-13-13-31 and BAM for some reason the computer posted with no stability issues. Don’t know why it all of a sudden decided to work but it did. The whole time I knew it wasn’t the RAM kit because I had it running on my old Z77 board at 2666MHz back before I killed it. The even weirder part comes in to when I change a voltage (doesn’t even have to be RAM related, It could be Vcore for example) and the computer will not post at all and I have to spend about 45 minutes switching it in and out of Auto and 100:100 until it decides to post. Its so weird and I still don’t understand it to this day, because I’m used to setting XMP and rolling with it but that does not work on this board at all so it has to be done manually.
Edit: Sometimes 100:100 won’t work and I’ll have to do 100:133 and do 2400MHz, it’s completely random when it decides to work. Once it is set though it has no problems posting unless like I said change literally anything in bios or power gets shut off unbeknownst to me. Then its fighting an uphill battle. Granted I’m on a modded BIOS but it still does it even on a non modded one so *shrug*. Some computers are just freaking weird.
I swear man, Z97's tendency to make absolutely no sense is unparalleled. Other than the issue I described in my previous post, I also had issues with my RAM (settings that were unstable before would go on to work with some errors first and then with no errors at all), issues with me not being able to overclock my cache at all whereas now it's at 4.3GHz 1.15V, I had my rig running stable at 1.7V input voltage for months until one day it decided to not work and it wanted 1.85V, while now it's more stable at 1.9V for some reason... I can go on, but you get the point. It makes no sense. It's not even degradation we're talking about here. Unless the damn thing degraded and then healed itself. In that case, I'm impressed. Otherwise, I'm pissed.
EDIT : Ah, I forgot to mention my favorite nonsensical behavior. So, when it was stable at 4.8GHz a few months back, it wasn't stable after a cold boot. It went like this. Cold boot-> Instability within 10 minutes of any stress test or game. Reboot (Be it manual right after booting or because of BSOD)-> Everything was stable and it would pass stress tests all day long. That behavior persisted until it decided to not work at 4.8GHz at all (Even with voltage set to nearly 1.4V). Now it works without needing all that jazz. Oh well...