Cpu clock speed lowers the higher the utilisation is, why?

[Dalynx]

I just got in today a I7 9700K upgrading from a 9600k at 5GHZ, I have a 650W psu and have the power settings set up in such a way to keep the processor at max clock speed when under load, yet when under load the 9700k drops from 5ghz all the way down to 4 depending on how many cores are being used, whenever running AIDA stress runs the same thing happens, yet my temps stay under 70C and it reports no throttling, of either kind, so I don't know what's up. motherboard is gigabyte gaming X Z390, thanks for the help

[Jurrunio]

9600k or 9700k? Either way none of them have 5GHz all core turbo (which is lower than single core turbo) so it's very much expected for clock speed to drop as use of cores increase

[Dalynx]

both haha, ihave overclocked them both to 5ghz myself in the bios, the 9600k stays locked at it constantly , whereas the 9700k drops depending on usage, both have turbo boost disabled in favour of standardised clock speeds

[.Apex.]

5 minutes ago, Dalynx said:

both haha, ihave overclocked them both to 5ghz myself in the bios, the 9600k stays locked at it constantly , whereas the 9700k drops depending on usage, both have turbo boost disabled in favour of standardised clock speeds

You need to increase your Power/Current limit in BIOS, though I don't know where you'd find that on a Gigabyte board.

[Dalynx]

Just now, _Syn_ said:

You need to increase your Power/Current limit in BIOS, though I don't know where you'd find that on a Gigabyte board.

I've got it set to 1.430 for vcore and have upped any other power settings bit by bit

 

[Dalynx]

https://photos.app.goo.gl/GR68iybNwSqqYWDd6

I'ma check the bios again to make sure the power is set right 

[.Apex.]

Just now, Dalynx said:

I've got it set to 1.430 for vcore and have upped any other power settings bit by bit

 

1.43 Is a bit high for 5Ghz, and I'm not sure which power settings you're talking about.

[Dalynx]

Just now, _Syn_ said:

1.43 Is a bit high for 5Ghz, and I'm not sure which power settings you're talking about.

It is but I wanted to make sure that wasn't the limit 

[.Apex.]

7 minutes ago, Dalynx said:

I've got it set to 1.430 for vcore and have upped any other power settings bit by bit

 

 

This should be the screen where you set your Power and Current limits (Gigabyte board)

[Mira Yurizaki]

This is normal. The advertised turbo boost value is for single or dual core workloads. It goes down the more cores are being used. Some motherboards have a feature that forces all of the cores to boost the maximum speed if possible.

[Dalynx]

2 minutes ago, _Syn_ said:

 

This should be the screen where you set your Power and Current limits (Gigabyte board)

https://photos.app.goo.gl/vobcV5EdkrJe4VRj8

[Dalynx]

2 minutes ago, Mira Yurizaki said:

This is normal. The advertised turbo boost value is for single or dual core workloads. It goes down the more cores are being used. Some motherboards have a feature that forces all of the cores to boost the maximum speed if possible.

I'm not sure why it worked so well on my 9600K tho

An I just placed the MOBO in auto mode and the cpu is holding at 4.6 all cores which is a start 

[Jurrunio]

17 minutes ago, Dalynx said:

both haha, ihave overclocked them both to 5ghz myself in the bios, the 9600k stays locked at it constantly , whereas the 9700k drops depending on usage, both have turbo boost disabled in favour of standardised clock speeds

VRM overheating? Maybe the board doesnt have any sensors for it. What case and cooler do you have?

[.Apex.]

1 minute ago, Dalynx said:

I'm not sure why it worked so well on my 9600K tho

 

Probably because it pulls less power, you set your TDP to 120W and at 1.43V it will surely pull much more than that which is why it's downclocking itself.

[Dalynx]

Just now, Jurrunio said:

VRM overheating? Maybe the board doesnt have any sensors for it. What case and cooler do you have?

I have an enthoo evolv ATX, and a h100I platinum

https://www.amazon.co.uk/Corsair-Platinum-Radiator-Advanced-Lighting/dp/B07JWB5BSN/ref=sr_1_1?keywords=h100i&qid=1579033054&sr=8-1

https://www.amazon.co.uk/Phanteks-ph-es314etg-AG-PC-Casing/dp/B06ZXZBT7C/ref=sr_1_2?keywords=enthoo%2Bevolv%2Batx&qid=1579033093&sr=8-2&th=1

[Dalynx]

2 minutes ago, _Syn_ said:

Probably because it pulls less power, you set your TDP to 120W and at 1.43V it will surely pull much more than that which is why it's downclocking itself.

That is probable, suppose the two extra cores would require a juice up

 

[Dalynx]

I've set it to all auto for now an it's holding 5ghz, So I will just have to lab out with the bios over time, thanks for the help everyone

[.Apex.]

Just now, Dalynx said:

That is probable, suppose the two extra cores would require a juice up

 

It should be set to 200W+ and don't forget to play with the Core Current Limit if it's still downclocking itself.

[Jurrunio]

4 minutes ago, Dalynx said:

I've set it to all auto for now an it's holding 5ghz, So I will just have to lab out with the bios over time, thanks for the help everyone

and dont forget that 1.43V under load could wear the chip out at a noticeable rate.

[Dalynx]

3 minutes ago, _Syn_ said:

It should be set to 200W+ and don't forget to play with the Core Current Limit if it's still downclocking itself.

Haha true enough, thanks for the help mate

[Mister Woof]

Ive never adjusted my power limit on my gigabyte boards and they stay at max boost forever.

 

Maybe the 8700k doesn't draw enough power on auto to hit a limit.

[.Apex.]

1 minute ago, Mister Woof said:

Ive never adjusted my power limit on my gigabyte boards and they stay at max boost forever.

 

Maybe the 8700k doesn't draw enough power on auto to hit a limit.

Most of the time Auto should be enough, though under certain workloads you might exceed the board's auto limits but in his case he manually set the power limit too low.