Overclocking 13900K Issues? ASUS AI overclock to 6.1GHZ...

[mav91890]

Used ASUS AI overclocking for my 13900K as I'm inexperienced with overclocking CPU's. AI Suite 3 shows the CPU is at 6GHz or 6.1GHz but when I run a stress test on Prime 95, the cpu drops to 4.6-4.8GHZ while using around 200-250W. The turbo speed is 5.8GHz, so I'm not really sure why I'm not seeing speeds closer to that at 100% usage. Set the motherboard to allow the CPU to go past intel limits as long as it doesn't exceed 90C. During Prime 95 stress test, it was stable at 78C.

 

Any idea why I'm not seeing the proper cpu speed of at least 5.8GHz? Thinking maybe I should just try to manually overclock myself. Last cpu I had was a 9700K and the Gigabyte motherboard made the process much easier.

[igormp]

5.8GHz is for single core turbo. As you use more cores, the lower the clocks will be unless you manually tune your OC configs.

 

Here shows it more clearly:

https://www.techpowerup.com/review/intel-core-i9-13900k/24.html

[JoHeJo06]

5 minutes ago, mav91890 said:

Used ASUS AI overclocking for my 13900K as I'm inexperienced with overclocking CPU's. AI Suite 3 shows the CPU is at 6GHz or 6.1GHz but when I run a stress test on Prime 95, the cpu drops to 4.6-4.8GHZ while using around 200-250W. The turbo speed is 5.8GHz, so I'm not really sure why I'm not seeing speeds closer to that at 100% usage. Set the motherboard to allow the CPU to go past intel limits as long as it doesn't exceed 90C. During Prime 95 stress test, it was stable at 78C.

 

Any idea why I'm not seeing the proper cpu speed of at least 5.8GHz? Thinking maybe I should just try to manually overclock myself. Last cpu I had was a 9700K and the Gigabyte motherboard made the process much easier.

P95 is an all core load, so clocks are lower than that 5.8Ghz turbo, because that is a single core max frequency.  and damn what cooling do you use to keep a 13900K at 78°C?

[RONOTHAN##]

Those "auto overclocking" utilities are generally worthless in my experience. They either pump way too much voltage into the CPU for no reason, they're horribly unstable on anything but golden sample CPUs, or they end up with worse performance than at stock. 

 

Personally, if I were you, I'd just leave that chip at stock. It should be doing 5.5GHz on the P cores under full synthetic loads, and unless you're pushing way too much voltage to cool you aren't likely to get more than 5.6GHz on all cores fully stable, at least in P95. The difference between 5.8GHz and 6GHz is not gonna be noticeable, and the difference between 5.5GHz and 5.6GHz isn't either. Manually tuning only really makes sense for XOC and for the 13600K/13700K since those chips do actually have some amount of headroom in them. 

[mav91890]

15 minutes ago, JoHeJo06 said:

P95 is an all core load, so clocks are lower than that 5.8Ghz turbo, because that is a single core max frequency.  and damn what cooling do you use to keep a 13900K at 78°C?

Have the Cooler Master PL360 Flux AIO with Noctua paste in a CM HAF 700 Beserker Case.

[mav91890]

Just want the best single core performance I can get, as a few of the games I play only use one core. So I shouldn't need to do anything for the 5.8ghz turbo? Not new to building but haven't messed around much with this in past builds. 

[-rascal-]

34 minutes ago, mav91890 said:

Used ASUS AI overclocking for my 13900K as I'm inexperienced with overclocking CPU's. AI Suite 3 shows the CPU is at 6GHz or 6.1GHz but when I run a stress test on Prime 95, the cpu drops to 4.6-4.8GHZ while using around 200-250W. The turbo speed is 5.8GHz, so I'm not really sure why I'm not seeing speeds closer to that at 100% usage. Set the motherboard to allow the CPU to go past intel limits as long as it doesn't exceed 90C. During Prime 95 stress test, it was stable at 78C.

 

Any idea why I'm not seeing the proper cpu speed of at least 5.8GHz? Thinking maybe I should just try to manually overclock myself. Last cpu I had was a 9700K and the Gigabyte motherboard made the process much easier.

 

The i9-13900K is a much more complicated CPU than your i7-9700K.

 

As others have already mentioned, the advertised is UP TO 5.7 / 5.8 GHz is max SINGLE CORE boost.

Even that, if following Intel specs, it short temporary bursts.

Otherwise, the Base frequency is 3.0 GHz for the P-Cores, and 2.2 GHz for the E-Cores.

 

https://www.intel.ca/content/www/ca/en/products/sku/230496/intel-core-i913900k-processor-36m-cache-up-to-5-80-ghz/specifications.html

 

4.6 GHz ~ 4.8 GHz on an ALL CORE workload / synthetic stress test like Prime95 seems normal.

Running 5.80 GHz constantly, especially on all cores, will violate both "125W" spec.

That is a hell whole lot of heat too.

 

Yes, you are better off to read, research, and learn how to overclock and tweak the CPU manually, rather than using an sort of "Auto Overclocking."

[mav91890]

On 2/10/2023 at 5:21 PM, -rascal- said:

 

The i9-13900K is a much more complicated CPU than your i7-9700K.

 

As others have already mentioned, the advertised is UP TO 5.7 / 5.8 GHz is max SINGLE CORE boost.

Even that, if following Intel specs, it short temporary bursts.

Otherwise, the Base frequency is 3.0 GHz for the P-Cores, and 2.2 GHz for the E-Cores.

 

https://www.intel.ca/content/www/ca/en/products/sku/230496/intel-core-i913900k-processor-36m-cache-up-to-5-80-ghz/specifications.html

 

4.6 GHz ~ 4.8 GHz on an ALL CORE workload / synthetic stress test like Prime95 seems normal.

Running 5.80 GHz constantly, especially on all cores, will violate both "125W" spec.

That is a hell whole lot of heat too.

 

Yes, you are better off to read, research, and learn how to overclock and tweak the CPU manually, rather than using an sort of "Auto Overclocking."

Saw someone playing hogwarts legacy on youtube at a fixed 6GHz with 13900k. How would you fix the clock speed? 

[Mark Kaine]

On 2/10/2023 at 11:17 PM, mav91890 said:

as a few of the games I play only use one core.

i haven't seen a game using only 1 core in a long time,  so im curious what games that would be?

 

 

On 2/10/2023 at 11:17 PM, mav91890 said:

Just want the best single core performance I can get,

reset CMOS and let it do its thing, as long you have good cooling it should boost by itself, no user interaction needed.

[-rascal-]

23 hours ago, mav91890 said:

Saw someone playing hogwarts legacy on youtube at a fixed 6GHz with 13900k. How would you fix the clock speed? 

 

You can do a manual overclock and lock the frequency at 6.0 GHz.

Example, my i7-8086K, I have all 6-cores running at 5.1 GHz at all times -- not using any adaptive voltage or adapter multiplier.