04-17-2023 10:48 AM
Hi everyone. At the end of February I tweaked a small OC to my i7 13700k. Just 55x to p-cores and 44x to e-cores. Also I enabled xmp 1 profile and did a small undervolt with -0.01V on adaptive voltage. Everything was stable and I could rerun Cinebench r23 again and again. After BIOS update the same settings became unstable and Cinebench keep crashing just on the start of multicore test. Few days ago I updated BIOS to the newest version 0904 and still the same thing. Could somebody answer me what could be a possible reason?
My setup:
Cpu: i7 13700k
Motherboard: asus rog strix z790-f wifi
Ram: G.Skill DDR5 32GB (2x16GB) 6000 Mhz Trident Z5 RGB Black (F5-6000J3636F16GX2-TZ5RK)
04-22-2023 08:47 AM
Ok great, I'd be interested to know your results.
By the way, the SP rating can give you an indication of how well you did at the silicon lottery, I only have an SP rating of 68 as shown in the bios screenshot.
04-23-2023 05:37 AM - edited 04-23-2023 09:44 AM
So, I did some testing and tried different values of voltage from 1.31 to 1.35 with llc 6. Unfortunately every time I started Cinebench it just keep crashing. Sometimes after 10 seconds but mostly after 1-4 seconds after start. I will pin a screenshot of values in HWINFO and Cinebench itself. P-cores I set to 55x and e-cores I left on auto. I thought that it could be a thermalright contact frame for cpu but if it wont installed right, I'd have problems with memory. I don't know if it reasonable to reinstall cpu, frame and cooling because as I remember I had 55x for some time with the frame
UPD:
I tried setting 55x to specific cores. Like 1-2, 3-4, 5-6, 7-8. In that case it can successfully end Cinebench test. I also tried just for an experiment setting a bigger voltage with higer llc. So, with huge temps and 1.35V on all cores it can pass test but I didn't run it fully to not cook the cpu. What could happen to my cpu just after a few month of daily usage so now it's such volts hungry?
04-23-2023 01:11 PM
Hard to say, it's possible you were reading the wrong value.
The Vcore is the actual voltage supplied to the cpu, this is the one you want to watch.
What you could do is...
Reset the bios to defaults and run Cinebench, when it's finished, check the maximum Vcore.
What does it show?
04-23-2023 02:01 PM - edited 04-24-2023 06:25 AM
I've loaded defaults in bios and run Cinebench and that's what I've got.
Could it possibly be that some cores just better than others and need less voltage? But if it's true, why there's such a big gap in voltage needed to operate between 54x and 55x?
04-24-2023 09:46 AM - edited 04-24-2023 09:47 AM
Thank you for that.
The CPU VID voltage is the voltage requested from the cpu, I usually don't pay much attention to this unless it's abnormally high.
During your testing, your cpu drew a maximum of 1.35v (Vcore) with the maximum core temp reaching 94c.
With a maximum core temp of 94c, 1.35v looks to be the limit with your cooling.
It's probably better to do per core overclocking.
Try this with P-cores only.
CPU Core voltage override - 1.35v
CPU System Agent voltage - 1.25v
LLC - Level 6
Core 1 - 55
Core 2 - 50
Core 3 - 50
Core 4 - 50
Core 5 - 50
Core 6 - 50
Core 7 - 50
Core 8 - 50
If it passes, raise only the first core to 56 and test again.
Keep an eye on temps, we don't want them to turn red in HWinfo.
04-24-2023 02:26 PM - edited 04-24-2023 04:17 PM
I entered values that you provided. Looks like that's too much voltage and it is instantly overheating so I decided to shutdown immediately the test.
Second screenshot I made during the test to show current volts with those settings. Looks like vdroop but in opposite way
Then i tried next settings and situation after was completely the same
I decided not to give up. After some fails I could achieve successful run in Cinebench with these settings:
1st p-core to 55x others left on auto
llc 4
1.3V CPU core voltage
CPU system agent left on auto
I also tried 56x. Test crashed after ~3 minutes and average vcore was 1.251
04-25-2023 05:35 AM
Temps hit 100c because the Vcore went to 1.412v. Higher voltage = higher temps.
You're probably better off sticking with the x55 per core overclock with 1.341v. Even if you upgrade your cooling, I don't see you getting much more out of it.
To avoid headaches with temps, stick with the x55 per core overclock with 1.341v.
04-25-2023 06:02 AM
Tried several times 55x with 1.341 to 1.345 from llc 5 to 6. Minimum 1.288 on Vcore and crashes every time. I think setting more voltage to reach 1.3-1.31 under heavy load like Cinebench won't be a good idea with absurdly high temps. Looks like I've to stick to stable 54x with OK temps. Probably my cpu doesn't have much headroom for overclocking on low voltage but somehow it just worked previously
04-25-2023 06:09 AM
Sticking with default settings is fine too, 5.4GHz is plenty fast.
04-25-2023 02:38 PM
Yes, you're completely right