9800X3D low frequencies under heavy load

[MyLittleFella]

Hello everyone, I just swapped my old 7700X for a brand new 9800X3D. Updated bios, fresh installed Windows 11 with latest updates, updated drivers from Asus website, everything brand new. Back with 7700X I'd get around 5.1 to 5.3 on all cores under heavy load (Aida FPU and OCCT). But now, I'm only getting 4.6 on Aida FPU and 5.0 on OCCT. Is this normal? I have a PL360 from cooler master and gelid extreme as thermal compound. Is this normal or something's wrong? PBO is enabled and DOCP as well, (but same happens with 'em off). My PC settings are the one from my bio/signature.

 

Here are some screenshots:

 

[-rascal-]

What you are seeing appears to be normal, if you are not manually tweaking / overclocking the CPU.

 

9800X3D is rated up to 5.2 GHz Boost - it as an extra layer of 3D Cache on top of the CPU die.

7700X is rated up to 5.4 GHz Boost.

 

I'm running a 9800X3D as well, on a Gigabyte X870E Pro Ice.

PBO is currently disable, EXPO with custom timings for DDR4-6200 CL30, with additional SoC voltage.

 

When stressing the FPU (e.g. Floating Point Unit) with something like AIDA64 Stability Test, it will run at a lower clock.

For one, running the FPUs at full blast on all-cores will make the CPU hit is "120W" rating limit.

 

Here is my 9800X3D running AIDA64 Stability Test, stressing just the FPU.

Boosts up to the advertised 5.2 GHz, but shortly drops down to 4.5 GHz. You can also see CPU Package Power and CPU PPT sitting at 147W.

 

 

 

Running the AIDA64 Stability Test, stressing just the CPU.

Maintains 5.2GHz across all cores. CPU Package and CPU PPT only hits 95W.

 

 

[porina]

Another factor is that AMD have improved their FPU in chiplet based Zen 5 to have more execution resource, enabling full rate AVX-512 like 2 unit Intel implementations. Up to 2x per clock of Zen 4, which is closer to Intel 1 unit implementation. They're doing more work, so clock drops. If the stress test allows you to disable AVX-512 instructions, then you might see closer to Zen 4 behaviour.

[freeagent]

You have to enable AVX 512, or else it sits dormant.

[MyLittleFella]

5 hours ago, -rascal- said:

What you are seeing appears to be normal, if you are not manually tweaking / overclocking the CPU.

 

9800X3D is rated up to 5.2 GHz Boost - it as an extra layer of 3D Cache on top of the CPU die.

7700X is rated up to 5.4 GHz Boost.

 

I'm running a 9800X3D as well, on a Gigabyte X870E Pro Ice.

PBO is currently disable, EXPO with custom timings for DDR4-6200 CL30, with additional SoC voltage.

 

When stressing the FPU (e.g. Floating Point Unit) with something like AIDA64 Stability Test, it will run at a lower clock.

For one, running the FPUs at full blast on all-cores will make the CPU hit is "120W" rating limit.

 

Here is my 9800X3D running AIDA64 Stability Test, stressing just the FPU.

Boosts up to the advertised 5.2 GHz, but shortly drops down to 4.5 GHz. You can also see CPU Package Power and CPU PPT sitting at 147W.

 

 

 

Running the AIDA64 Stability Test, stressing just the CPU.

Maintains 5.2GHz across all cores. CPU Package and CPU PPT only hits 95W.

 

 

Sir, thank you so much for your answer, it was very informative and saved me from opening it up (the pc) again just to reapply the thermal compound. 

Later, I've found this link that even adds more info to it as well. Since, as far as I know, the PBO doesn't get passed from the 5.2 GHz adversited and it's not manual tweaking like curve optimizer or manual OC, I think it's all good then.

 

Just one final question: Given the OCCT settings, the clocks under AVX (not AVX-512) are okay? Do you get the same results? Thanks in advance.

 

 

[-rascal-]

19 hours ago, MyLittleFella said:

Sir, thank you so much for your answer, it was very informative and saved me from opening it up (the pc) again just to reapply the thermal compound. 

Later, I've found this link that even adds more info to it as well. Since, as far as I know, the PBO doesn't get passed from the 5.2 GHz adversited and it's not manual tweaking like curve optimizer or manual OC, I think it's all good then.

 

Just one final question: Given the OCCT settings, the clocks under AVX (not AVX-512) are okay? Do you get the same results? Thanks in advance.

 

 

I'll have to run OCCT and confirm...will get back to you.

[MyLittleFella]

2 hours ago, -rascal- said:

 

I'll have to run OCCT and confirm...will get back to you.

Okay, I appreciate it!

[MyLittleFella]

15 hours ago, -rascal- said:

 

I'll have to run OCCT and confirm...will get back to you.

Hey mate, do you have the results/screenshots? 

[-rascal-]

On 6/17/2025 at 6:25 AM, MyLittleFella said:

Sir, thank you so much for your answer, it was very informative and saved me from opening it up (the pc) again just to reapply the thermal compound. 

Later, I've found this link that even adds more info to it as well. Since, as far as I know, the PBO doesn't get passed from the 5.2 GHz adversited and it's not manual tweaking like curve optimizer or manual OC, I think it's all good then.

 

Just one final question: Given the OCCT settings, the clocks under AVX (not AVX-512) are okay? Do you get the same results? Thanks in advance.

 

 

Using the same settings are you, I get this.

Again, you have PBO On, while I currently have it Off, so you're seeing 5.0 ~ 5.1 GHz, while I'm sitting at around 4.9 GHz.

Power is about the same...you're like 5W more, basically within variance (e.g. different motherboard, etc).

Temperature is pretty close, I'm running an open loop, while you're using an AIO.

 

[freeagent]

If you want to push high clocks in those type of workloads, you have to have PBO enabled, you have to extend your PPT/TDC/EDC limits, you have to have CO enabled, and you have to have boost override enabled. Running a single CCD part should make this easy work for your AIO or open loop.

[KidKid]

On 6/17/2025 at 12:28 AM, MyLittleFella said:

Hello everyone, I just swapped my old 7700X for a brand new 9800X3D. Updated bios, fresh installed Windows 11 with latest updates, updated drivers from Asus website, everything brand new. Back with 7700X I'd get around 5.1 to 5.3 on all cores under heavy load (Aida FPU and OCCT). But now, I'm only getting 4.6 on Aida FPU and 5.0 on OCCT. Is this normal? I have a PL360 from cooler master and gelid extreme as thermal compound. Is this normal or something's wrong? PBO is enabled and DOCP as well, (but same happens with 'em off). My PC settings are the one from my bio/signature.

 

Here are some screenshots:

 

Those speeds you are seeing are normal, if all 8 CPU cores are working at 100% load. The speeds is 4.7Ghz all core and 5.4Ghz boost.

[freeagent]

It really just depends on the load that you present the CPU with.

 

 

[MyLittleFella]

On 6/20/2025 at 4:43 PM, KidKid said:

Those speeds you are seeing are normal, if all 8 CPU cores are working at 100% load. The speeds is 4.7Ghz all core and 5.4Ghz boost.

The advertised boost is 5.2; 5.4 only if cpu boost clock override maxed out at 200 MHz.

[MyLittleFella]

On 6/20/2025 at 9:23 AM, freeagent said:

If you want to push high clocks in those type of workloads, you have to have PBO enabled, you have to extend your PPT/TDC/EDC limits, you have to have CO enabled, and you have to have boost override enabled. Running a single CCD part should make this easy work for your AIO or open loop.

Actually I'm okay with those numbers, I just wanted to know if they were inside the proper range (which, now, i know they are lmao ). 

 

Outta curiosity, what is PPT/TDC/EDC? Apart from PBO and CCD I don't know what those are.

[MyLittleFella]

On 6/20/2025 at 2:58 AM, -rascal- said:

 

Using the same settings are you, I get this.

Again, you have PBO On, while I currently have it Off, so you're seeing 5.0 ~ 5.1 GHz, while I'm sitting at around 4.9 GHz.

Power is about the same...you're like 5W more, basically within variance (e.g. different motherboard, etc).

Temperature is pretty close, I'm running an open loop, while you're using an AIO.

 

Sir, thank you so much for your reply. I can't stress enough how much you've helped me. Wishing you all the best! If you ever need anything I can help with, just hit me up via DM.

 

Cheers!