yosemite not liking overclock

i just installed yosemite on my ga-z87mx-d3h and 4770K and yosemite is really not liking overclocking. i had a solid 4.3 overclock in mavericks but im trying stuff and either it crashes after a bit of OS loading or it decides to be slow... anybody knows what to do?

I've a different problem: my Sabertooth Z77 + i7 3770K rig can't get overclocked at all despite proper BIOS settings. Mavericks is OK, though. Must be the kexts, I guess.

i ended up removing it, motion would crash like crazy i had had changed something in the bios...

You can't just overclock to some given frequency and expect it to be stable. At a certain point-- usually not that far from stock-- you need to start manually adjusting voltages. A higher frequency requires higher voltages, and higher voltages increase heat. Your system probably isn't stable because you're not giving it enough voltage somewhere, and that's only showing up in applications like Motion that can really peg the CPU.

99.9% of the time if going from one OS to another breaks your overclock... (but the system will run fine at stock in both systems)-- that's a sign that your system was never really stable in the first place. It's just that the new OS/apps are pushing your system harder (maybe getting more out of them... a good thing!) than before, so that instability is finally showing up. That's why people who OC tend to test for stability by running apps (Intel Burn Test/Linpack/LinX, Prime95, Handbreak, FPS gaming) that are able to variously peg the CPU, peg the GPU, peg the RAM, and raise heat-- ideally to a degree beyond what any other application you're going to use will do. When it's stable at those things, then it's ready for day-to-day use.

Too fast with too little voltage = crashing.
Too fast with way too little voltage, or too fast no matter the voltage = won't boot.
Too much heat = automatic shutdown (to protect the system).
Too much voltage = damage.

TANSTAAFL!

I think there is something else going on with Yosemite. I just built a system with an MSI Z97 Gaming 5 and an i7-4790k. It is perfectly stable @ 4.6GHz in Windows 7 using all the standard stability testing programs available. I also saw flakey behavior with an Asus Z97-A as well. I am able to use the BIOS option that runs all the cores at the default 1 core turbo boost setting of 4.4GHz but if I raise the multiplier higher than 44 (either all cores or per core in BIOS) Yosemite won't boot at all and gives a memory allocation error.

Anyone had any luck overclocking in Yosemite?

Maybe it's a Mobo issue. My Xeon X5650 runs at 2.66 stock and 3.06 Turbo. I have it OC'd to 4.2 on all cores. There are lots of folks with Yosemite overclocks on various mobos.

I don't think it's an inherent Yosemite issue, though it's conceivable that there are specific Yosemite-mobo-oc issues happening... or that what you thought was stable in Windows just isn't stable in Yosemite. There's no such thing as "stable" as a universal term, it's all context/environment/use-specific. That's why some folks consider 10x intel burn test stable, while others want prime overnight, others test via gaming/encoding.

Have you tried increasing voltages to get your OC stable in Yosemite?

Thanks for the response...Yes I've tried all those things and my guess is that this is a motherboard issue perhaps. Just changing the 1-core multiplier to 45 causes OS X not to boot and the CPU has a lot more headroom than that. I'm not exactly new to overclocking...used to own a business building systems back when the Celeron 300A OC'd to 450MHz was all the rage. Ahh, the good old days

ihatecheez said:

i just installed yosemite on my ga-z87mx-d3h and 4770K and yosemite is really not liking overclocking. i had a solid 4.3 overclock in mavericks but im trying stuff and either it crashes after a bit of OS loading or it decides to be slow... anybody knows what to do?

Click to expand...

Hi !

I read somewhere that everything depends on your processor. Some of processors can't handle the same amount of overclocking that can be done to another. Yesterday I've managed to overclock my 4770K to 4.4 GHz with no biggie. I'm using it with 16GB Ram plus cooling with Hyper 212 EVO on GA-Z87x UD5H. I did not stress the processor with unrealistic test such as Prime 95 but I've tested with real world performance - Adobe CC - Premiere and After Effects. Yesterday I've run this setup for more then 16H strainght and everything is super stable. As the temps goes I've got around 38*C - 40*C idle and around 70*C - 75*C when full on rendering is running.

Below I'm posting proof and later today I will post my BIOS setup.

I'm not sure if this will help, but on my overclocked dual boot setup, I can run the default Prime95 torture test for 13+ hours on Windows 8.1 and that Generate P and C States is a no go; it prevents Yosemite from booting at all.

archelon said:

I'm not sure if this will help, but on my overclocked dual boot setup, I can run the default Prime95 torture test for 13+ hours on Windows 8.1 and that Generate P and C States is a no go; it prevents Yosemite from booting at all.

Click to expand...

This is strange... How did you set up your OC settings in BIOS?

I was able to push safely my 4770K with Hyper 212 Evo up to 4.4 GHz. Setting in BIOS CPU upgrade to 4.4GHz option, choosing K OC mode Enable from advance tab and changing manually VCore voltage to 1.250 and everything is running smooth. Temps running up to 70*C+ temps stressed. I feel that I can push more with better cooler. I've enabled EIST as well in BIOS under advance settings in performance tab.

Here I'm posting couple of benchmarks

Standard setup without any change


K OC mode enable but clock speed unchanged but voltage set up at 1.250


4.4GHz , K OC is on, CPU multiplier x44 and voltage set up at 1.250

I've noticed that when leaving the voltage to auto at 4.4GHz ( eventually it will run around 1.320) will end up scoring lower than unchanged 3.9GHz