Issue with OC i9-10900k

Chris J · 25 Oct 2021 at 18:20

Hi im having a issue with my OC i have a MSI Z490 Tomahawk Motherboard and Corsair H100x AIO.
The issue im having is when im playing certain games after a while my PC Shuts Off And Restarts itself.
the only thing i did was change the Core Ratio Multiplier to 51x Which is 5.1ghz and everything was on Auto. did i make a mistake? Im still fairly new to overclocking.

Joxeon · 25 Oct 2021 at 18:41

Chris J said:
Hi im having a issue with my OC i have a MSI Z490 Tomahawk Motherboard and Corsair H100x AIO.
The issue im having is when im playing certain games after a while my PC Shuts Off And Restarts itself.
the only thing i did was change the Core Ratio Multiplier to 51x Which is 5.1ghz and everything was on Auto. did i make a mistake? Im still fairly new to overclocking.

You likely need to to change the Vcore also, start at 1.3v and 48 multi then increase the multi till it crashes (test with a good 10 mins of cinebench R23) then either lower the multi or up the vcore but I wouldn't recommend going over 1.35v and you want to keep an eye on temps.

Chris J · 25 Oct 2021 at 18:46

Joxeon said:
You likely need to to change the Vcore also, start at 1.3v and 48 multi then increase the multi till it crashes (test with a good 10 mins of cinebench R23) then either lower the multi or up the vcore but I wouldn't recommend going over 1.35v and you want to keep an eye on temps.

Something i have done so far. recommended from MSI is i manually put a vcore on 1.320v and Loadline Calibration to Level 4 this is at 5.1ghz im gonna test out a bunch out some games for an hour or two and will let you know how it goes. I have my Rivatuner all set up so im always monitoring my temps while gaming and i also monitor the CPU Voltage aswell.

MartinPrince · 26 Oct 2021 at 08:28

It should be quicker to use Realbench to test for stability as it puts realistic stress on the CPU and GPU systems at the same time. Don't use Prime95.

Game stress testing is much more fun though you run the slight risk of corrupting your game files if you get a crash at the wrong time.

Chris J · 26 Oct 2021 at 15:02

MartinPrince said:
It should be quicker to use Realbench to test for stability as it puts realistic stress on the CPU and GPU systems at the same time. Don't use Prime95.

Game stress testing is much more fun though you run the slight risk of corrupting your game files if you get a crash at the wrong time.

i ran a benchmark on Realbench it completed it all fine no issues. However i did notice a strange crash issue on Cyberpunk in the same exact spot so today i raised my LLC to Level 5 and going to retest again.

MartinPrince · 26 Oct 2021 at 15:24

Chris J said:
i ran a benchmark on Realbench it completed it all fine no issues. However i did notice a strange crash issue on Cyberpunk in the same exact spot so today i raised my LLC to Level 5 and going to retest again.

The benchmark is not the stress test. You have to run the stress test instead.

I run it for 30min initially, which tends to pick up the first stages of pure CPU instability relatively quickly. Once you start to get to the borderline of stability then you may need to run it longer.

Also for memory overclocks I tend to use something else (Karhu- paid for) as Realbench might not pick those up whereas many games are more sensitive to that and will crash fairly soon.

Chris J · 26 Oct 2021 at 15:38

just did around 11 minutes but my CPU Temps are very high around 88c to 90c It had a few stuff on the left saying "Result Hash Match"

Chris J · 26 Oct 2021 at 15:41

MartinPrince said:
The benchmark is not the stress test. You have to run the stress test instead.

I run it for 30min initially, which tends to pick up the first stages of pure CPU instability relatively quickly. Once you start to get to the borderline of stability then you may need to run it longer.

Also for memory overclocks I tend to use something else (Karhu- paid for) as Realbench might not pick those up whereas many games are more sensitive to that and will crash fairly soon.

just did around 11 minutes but my CPU Temps are very high around 88c to 90c It had a few stuff on the left saying "Result Hash Match"

MartinPrince · 26 Oct 2021 at 16:22

11 minutes is not really long enough. Are you running HWInfo64 which will show your real voltages etc.?

Chris J · 26 Oct 2021 at 16:29

MartinPrince said:
11 minutes is not really long enough. Are you running HWInfo64 which will show your real voltages etc.?

Yeah i keep HWInfo on the side while stress testing. its around 1.350v while stress testing. The problem now is my temp is hitting 88c to 90c on a H100x Cooler. should i worry about that or just leave it going for the full 30 minutes?

Chris J · 26 Oct 2021 at 17:40

MartinPrince said:
11 minutes is not really long enough. Are you running HWInfo64 which will show your real voltages etc.?

i figured out the issue its a problem with my case airflow now i sorted it out i was around 77-78c For a Full 30 Minutes this time and the test completed with no errors.

MartinPrince · 26 Oct 2021 at 18:32

Yes as @doyll will rightly remind you, good case cooling is often overlooked when overclocking. Is your memory at XMP?

Chris J · 26 Oct 2021 at 18:49

MartinPrince said:
Yes as @doyll will rightly remind you, good case cooling is often overlooked when overclocking. Is your memory at XMP?

yeah ive done some tweaks to my case setup and optimized my fan speeds a bit. And yes XMP is enabled its at (3000mhz) 16GB DDR4 which is what my ram kit is.

luismenendez · 27 Oct 2021 at 13:26

I'd try to overclock the memory to 3200/3400 Mhz. I have done it many times with memory kits rated under 3000Mhz using dram calculator for ryzen as a guide for timings/speed

MartinPrince · 27 Oct 2021 at 14:40

luismenendez said:
I'd try to overclock the memory to 3200/3400 Mhz. I have done it many times with memory kits rated under 3000Mhz using dram calculator for ryzen as a guide for timings/speed

Yes, once you've got your CPU FULLY stable then I advise 'tuning' your memory. I had some Corsair 2600Mhz memory that ran at 3400Mhz.
When it comes to gaming then getting your memory latency down by tuning it will improve frame-times which we tend to feel as 'smoothness' of the game. If you have the spare time then it's worth doing.