I upgraded from a stable bios pre-Rocket Lake release to 2103 and I have an issue to report. (Maybe from bios 0607 or 0901 don't remember exactly)

My specs.

i7-10700K Comet Lake clocked at 1-3 cores @ 5.1, 4-6 @ 5.0 and 7-8 @ 4.9 GHz.
Motherboard ROG Strix Z490-F


Prior to the rocket lake bios (2103) each frequency would set up the voltage via the V/F voltage curve. So at 4.9GHz my system would request a VID of 1.26v to 1.28v when running an all-core load via CB R23.

If I ran a single-core load via CB R23, the system would go upto 5.1GHz and request a VID of 1.35v to 1.375v. The overclock in bios I used was per-core overclocking.

Now after rocket lake 2103, at 4.9GHz the system would use a VID of 1.375v or greater if I set a per core overclock.

So I believe the new 2103 bios introduces an overclocking bug in the per core overclock for Comet Lake.

For now I have reverted to a fixed all core overclock instead and the system will use the voltage I set.

I was using Shamino's recommended AC/DC adjustment to control my voltage. Left LLC at Level 4 and used AC/DC LL of 0.4 oHms.

pianobench wrote:
I upgraded from a stable bios pre-Rocket Lake release to 2103 and I have an issue to report. (Maybe from bios 0607 or 0901 don't remember exactly)

My specs.

i7-10700K Comet Lake clocked at 1-3 cores @ 5.1, 4-6 @ 5.0 and 7-8 @ 4.9 GHz.
Motherboard ROG Strix Z490-F


Prior to the rocket lake bios (2103) each frequency would set up the voltage via the V/F voltage curve. So at 4.9GHz my system would request a VID of 1.26v to 1.28v when running an all-core load via CB R23.

If I ran a single-core load via CB R23, the system would go upto 5.1GHz and request a VID of 1.35v to 1.375v. The overclock in bios I used was per-core overclocking.

Now after rocket lake 2103, at 4.9GHz the system would use a VID of 1.375v or greater if I set a per core overclock.

So I believe the new 2103 bios introduces an overclocking bug in the per core overclock for Comet Lake.

For now I have reverted to a fixed all core overclock instead and the system will use the voltage I set.

I was using Shamino's recommended AC/DC adjustment to control my voltage. Left LLC at Level 4 and used AC/DC LL of 0.4 oHms.

I've solved my issue. It looks as if I made a mistake.

My problem was with Intel XTU and overclocking in that desktop application on windows 10. I uninstalled the program. Restarted my computer then installed the latest Intel XTU program.

Now my CPU correctly boosts with normal 10700K turbo boost behavior.

Here was my expected behavior that I was looking for.

Intel stock 10700K --> 1-3 cores@5.1GHz at 1.315v, 4-5 cores@4.8GHz at 1.235v, 6-8 cores@4.7GHz at 1.19v

Overclocked via BIOS --> 1-3 cores@5.1GHz at 1.325v, 4-5 cores@5.0GHz at 1.305v, 6-8 cores@4.9GHz at 1.265v

Here was what I was experiencing after adjusting the per core overclock settings via Intel XTU on the desktop app. (Stock settings all auto in Bios 2103)

Overclocked via Intel XTU desktop --> 1-3 cores@5.1GHz at 1.35v, 4-5 cores@5.0GHz at 1.35v, 6-8 cores@4.9GHz at 1.35v

So my problem was an Intel XTU issue. Nothing wrong with Bios 2103 for Asus Z490-F on comet lake. I just wanted to update this issue.

pianobench wrote:
I've solved my issue. It looks as if I made a mistake.

My problem was with Intel XTU and overclocking in that desktop application on windows 10. I uninstalled the program. Restarted my computer then installed the latest Intel XTU program.

Now my CPU correctly boosts with normal 10700K turbo boost behavior.

Here was my expected behavior that I was looking for.

Intel stock 10700K --> 1-3 cores@5.1GHz at 1.315v, 4-5 cores@4.8GHz at 1.235v, 6-8 cores@4.7GHz at 1.19v

Overclocked via BIOS --> 1-3 cores@5.1GHz at 1.325v, 4-5 cores@5.0GHz at 1.305v, 6-8 cores@4.9GHz at 1.265v

Here was what I was experiencing after adjusting the per core overclock settings via Intel XTU on the desktop app. (Stock settings all auto in Bios 2103)

Overclocked via Intel XTU desktop --> 1-3 cores@5.1GHz at 1.35v, 4-5 cores@5.0GHz at 1.35v, 6-8 cores@4.9GHz at 1.35v

So my problem was an Intel XTU issue. Nothing wrong with Bios 2103 for Asus Z490-F on comet lake. I just wanted to update this issue.

Hello.
Can you use manual voltage without issues with at least 5.0ghz or with any other frequency?
I have the same MB (2103) and my problem is that I can't use manual (or adaptive, or even offset) vcore. MB lives their own life with own laws.
For example: I turn off any AI OC, setting XMPII with SVID support on auto with Typical Scenario (mb doesn't boot with SVID support off with any vcore), setting 1.45v with 4.0ghz and... It works with 1v on vcore. I just cant influence at vcore at all.
So now I use 10850k with stock freq with auto vcore with no PL, SA/IO 1.160 (4 sticks g.skill 32g, 3600, 1.35v, cl18), LLC5 (i don't even know how right or wrong it works) and AC/DC LL 0.20. In that way it works quiet and colder with auto vcore 1.243v max on any loads without WHEA errors on AVX tests.
So the problem is I can't turn off SVID support and set manual vcore for good OC with 5.0ghz all cores.
Seems like MB uses AI vcore corrections even I turned it off. When I use Intel XTU the vcore is not correct at all - set on 1.190v gives 1.27v in fact and so on.
I saw a few people with the same issues and there's no solution.