Overclocking for the first time, running into problems :(

[guruabyss]

Hi everyone,

I just finished building the following box the other day:

- Intel i7-6900k (3.2GHz trying to OC to 4GHz but would like to go to 4.2GHz)
- Asus Rampage 10 Edition 10 (Lastest BIOS flash)
- Corsair DOMINATOR Platinum Series 64 GB DDR4 3200 C16
- Corsair Hydro Series H115i
- Corsair HXi Series, HX1000i
- Samsung 950 Pro (512GB - OS + Apps)
- Samsung 850 Pro X2 (1TB - Raid 1 - Work Files)
- Nvidia Titan X-Pascal

I ran the system at it's default settings and everything seemed fine, I decided to do some research on overclocking using recent videos on youtube to tweak my system. Now what's odd is when I changed the CPU core speed to 4GHz and saved my settings in the BIOS is still showed as 3.2GHz (right hand side of the attached BIOS image) and using CPU-Z (in attached image in the BLUE box) it shows little under 3.2GHz.

When I log into windows everything seems fine, no system lag. A few minuets later the system lags and I get the following from windows: http://new.tinygrab.com/5ff8c90b9c29d14507095e89f9f1b2222ce78cc240.png

BIOS + CPU-Z screenshot: http://new.tinygrab.com/5ff8c90b9c5f2fa4c2fab8bf49c10ed6e464151c8b.jpg

** UPDATE: I changed the core speed to 4.2GHz and took a screenshot of HWiNFO64 + CPU-z: http://new.tinygrab.com/5ff8c90b9ce503bc3e6b76ce4098f002aff557bc7a.png system still has windows lag issue when idel

What am I doing wrong?

Thank you for any help/ guidance to this overclock noob.

[Nate152]

All right

I'm sorry you're having such problems, you're narrowing it down though with two ram kits and a new motherboard, let's hope you get good results this time.

Yes give it a try with minimal components, if it still doesn't pass let's maybe try a different memory tester.

Good luck I got my fingers crossed, give us an update once you run the test.

[guruabyss]

Ok so, It's not my memory (tried two different brands), it's not my Mobo (bought a second one to trouble shoot), I unhooked all SSDs from the mobo and I even swapped out GPUs to see if maybe that was the issue. Is it safe to say its the CPU?

[Nate152]

Is the memory test still not passing?

[guruabyss]

It's not passing, still locks at the 16% and it's also not the CPU:

So I now know I know nothing, I really thought I finally narrowed it down to the CPU... Is Memtest86 V7.1 buggy or something? I've tested everything... I'm so at a loss. Everything about this box is default just wish I knew what the issue is.

[guruabyss]

Here is my latest testing:

System hasn't froze or crashed, going to keep this test going for an hour, would it be ok to run it over night?

[SgtHighway]

Had exact same problem with memtest86. It's some kind of UEFI/multiprocessor issue.
I got past the problem when I selected CPU mode single and ran with CPU 0.

The issue occurs when running in parallel mode (not sure bout robin or the other mode).

[guruabyss]

I got past the problem when I selected CPU mode single and ran with CPU 0.

Is that option in Memtest86 and if so where?

[SgtHighway]

That is option in memtest86. It's under the CPU selection in memtest settings.
There you see single (and u need to select what cpu to use 0,1, 2, 3....), parallel, round robin etc

[guruabyss]

SgtHighway wrote:
Had exact same problem with memtest86. It's some kind of UEFI/multiprocessor issue.
I got past the problem when I selected CPU mode single and ran with CPU 0.

The issue occurs when running in parallel mode (not sure bout robin or the other mode).

@SgtHighway - You sir... you hit the nail on the head! I would of never thought that having more than one CPU going would case a memtest to freeze! Did you read this solution else where or were you just messing around inside memtest and just tried that option? Ugh I feel like such a fool going through all of this running around, late nights, early mornings and lack of sleep just for something as simple as running a single core to test.... sigh... I can't thank you enough for solving that issue.

After running memtest86 for 2 hrs with only one core it seemed the mem was good to go. I tried to run Memtest86+ but I ran into too many issues with trying that program. I did the USB option, tried to format/install using the Mt86+ installer and it kept telling me it wouldn't be bootable (tried to format/install a few more times). After a few hours of reading forums I was able to move forward, changed the boot order to USB. At boot-up it would load a blank screen then automatically go back into the BIOS settings. Gave up and moved on.

Ran windows memory diagnostic first as standard and it passed and I threw 14 hrs at Extended but it seem never to move from 21% so I figured 64GB takes days to check or somethings up. Also keep in mind now that things seem stable I will be updating the BIOS and starting to do some OC testing so I'll post numbers/ progress.

I'll test another block of 64GB to see what's up. I'll try to grab some sticks today and report back.


@Nate152 - I'll try those settings, I might do some more digging and see what other timings other users are using for that mem type. Thank you for your time 🙂

[Nate152]

Good to see you're making progress !