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Humza · ‎02-03-2018

So alot of people have been having success of achieving 5ghz with same chip, with max vcore of 1.35v which seems weird for me,
either it's a bad chip and im unlucky or i must be doing something wrong.
I'm running latest 0607 bios version for my motherboard.
Lets start up with my components: https://pcpartpicker.com/list/4Lth6X
Also having installed a NZXT Internal usb hub and Nzxt hue+

So I've tried overclocking my 8700k, but it seems to be unstable. I've followed the der8auer's guide on youtube.
https://www.youtube.com/watch?v=CoUtA7DKXhU

So far i've ran an memtest86 of 1½ hour with 0 errors.

I will be trying 4.8ghz@1.30v that should be a good start right? Or should i go even higher with the volt. Also since 8700k auto turbo is 4.7 should i only have avx set to 1? so it goes down to 4.7 or would 2 be better.
-YES i am using XMP for 3200mhz 1.35v on my rams.

Edit:
Results for 4.8ghz@1.30v LLC6 avx -2
Max VCore 1.296v - Min VCore 1.280v (HWInfo64)
Max Temp on Realtemp: 87c on core3 rest 82c
Avg Temp on HWInfo64: 69c | Max temp on HWInfo64: 82c
Crash after 8 minutes of 1344fft prime95 26.6

How come the difference is so big when in bios i set it to 1.30v the minimum is 1.280v shown in HWInfo64.
The difference is 0.2v on minimum vcore from what's set on bios.
Is this called vdroop? I'm sorry if im mistaken, im new to all these terms. 🙂

Any particular reason why realtemp and hwinfo64 shows different temps?

Edit:
Results for bios default options - XMP disabled.
Prime95 26.6 1344fft
Max VCore 1.216v - Min VCore 0.656v - Avg VCore: 1.132v (HWInfo64)
Max Temp on Realtemp: 65c
Avg Temp on HWInfo64: 57c~ | Max temp on HWInfo64: 66c
System stable, ran for 20min~

Humza · ‎02-03-2018

Currently running same 1344fft prime95 26.6 test no xmp full default bios options, just to check temps and volting.
Will edit main post with info.

Menthol · ‎02-03-2018

Software monitoring programs may not be 100% accurate and it is normal to see small differences from one to the other, only accurate reading is from a DVM and never run 2 or more monitoring apps at the same time or you will get polling errors. You will also see a difference from what you manually set in the bios to what software reads.
Every CPU is different, quality and capabilities can be pretty huge, if you look on Silicon Lottery's site they have binned 8700K's that range from 4.9 to 5.3 GHZ
You should update the bios to the latest then enter F5 for optimized defaults, run a stress test and record CPU frequency, temperature, vcore, vccio and vccsa.
Then set CPU to all core and manually enter 50 for 5GHZ, leave voltages on auto and restart, run stress test again and record CPU frequency, temperature, vcore, vccio, and vccsa again.
If it doesn't boot or temps are to high you can manually lower vcore, and or frequency to 49, or 48. after you settle on what frequency your CPU can run stably you can start lowering voltages and test again, set LLC, XMP and vccio and vcssa.
Temps will typically be the limiting factor on your overclock

Humza · ‎02-03-2018

Ok so now i can't even get the pc to show display..
I've turned off the computer, unplugged the power cord, took out gpu, took out cmos battery, held power button for a couple of times each 20secs to get power out the system. I even reset cmos with a screwdriver and i can't get the system to post.
It's like at random times it doesn't want to post, oh and.. It crashed again, this time i was running XMP and pressed "yes" when you enable xmp so i assume MCE and turbo was turned on. (I was streaming while this happend). So now im trying to get my pc up and running again. I guess i won't be trying to OC, and just run with XMP enabled only, this is too much of a hassle.

Humza · ‎02-03-2018

Default bios options, mce and stuff on auto cause default?
only xmp enabled, streaming while playing a game and it crashes?
Could it be faulty ram? I did run memtest86 for 1½ hour, tho without XMP being turned on.

Menthol · ‎02-03-2018

Unstable memory, increase vccio and vccsa voltages 1.2 to 1.25 volts
Memtest86 doesn't test memory while in the Windows environment, use HCI memtest

There is absolutely nothing wrong with default factory speeds, these systems are very fast at default

Humza · ‎02-03-2018

Menthol wrote:
Unstable memory, increase vccio and vccsa voltages 1.2 to 1.25 volts
Memtest86 doesn't test memory while in the Windows environment, use HCI memtest

There is absolutely nothing wrong with default factory speeds, these systems are very fast at default

as far as i know, i was running vccio and vccsa on auto when running the default bios settings, i must've since i didn't touch anything.
As for memtet86 i was using a usb to run the memtest on bootup if that's what you want me to do.
Matter of fact im running memtest86 again right now, same method as explained above, using usb to boot the memtest86.
https://www.memtest86.com/ heres the link.

Silent_Scone · ‎02-04-2018

Menthol is referring to this http://hcidesign.com/memtest/purchase.html

Memtest86 is not a good stress test for these newer platforms. Open an instance per CPU thread (12 in total) dividing 90% of available memory per instance. Leave for 400% coverage. As mentioned above, software reporting can often be off by 20mv, sometimes more.

13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

Humza · ‎02-04-2018

UPDATE:
I've ran memtest86 with xmp enabled untill it completed and it showed 0 errors. After this i used default bios options, so disabled xmp and ran some IBT tests, with factory default bios options. The results is as following:

Stress Level: Standard
https://imgur.com
https://imgur.com

Stress Level: Very High
https://imgur.com
https://imgur.com

System is stable with default bios options it seems.
the real question is if i should try stream/play game to see if any crash happens. Since last time i streamed/played with xmp enabled, rest were factory default bios options the pc crashed. NO BSOD, eventlog showed bugcheckcode 0.

Humza · ‎02-04-2018

Silent Scone wrote:
Menthol is referring to this http://hcidesign.com/memtest/purchase.html

Memtest86 is not a good stress test for these newer platforms. Open an instance per CPU thread (8 in total) dividing 90% of available memory per instance. Leave for 400% coverage.

Don't i need to open 12 instances? since 8700k has 6 cores 12 threads.
Also should i try this without xmp enabled first and then with xmp enabled.
Also how long will i be running the test for.

8700k Finding a stable OC.