Rx6800M not using full power

[Yochi]

i'v been using Rog strix g15 AE for 2 years now, i wanted to do some thermal change because i noticed some performance drops over the last few months, prior change i ran some benchmarks and noticed that my gpu was only using 90-100 watts, temps were 84-85C overall, 80C junction and 102-103C hotspot, time spy score was 8k, cpu temps were hitting 97C on 30-35W usage, after thermal change cpu temps came down to 89C on 50W usage and gpu to 81-82C overall, 72C junction and 100-101C hotspot, but power consumption basically stayed the same it averages on around 95W TGP , i'v seen other people run this gpu on 86-87C on full 130W power so i'm confused why mine is using almost 40W less when temps got much better. time spy score didn't change. i used arctic tp-3 thermal pads 0.5mm and 1mm, for gpu and cpu instead of liquid metal i went for arctic mk-6.

[ewitte]

 

30 minutes ago, Yochi said:

 i'v seen other people run this gpu on 86-87C on full 130W power so i'm confused why mine is using almost 40W less when temps got much better. 

Most laptop GPUs have multiple power targets which are determined by the Manufacturer when they design a model.  It can be drastic too, like a card that can run 150W but systems can be designed all the way down to 65W!  

[Mark Kaine]

37 minutes ago, ewitte said:

 

Most laptop GPUs have multiple power targets which are determined by the Manufacturer when they design a model.  It can be drastic too, like a card that can run 150W but systems can be designed all the way down to 65W!  

Is this done through vbios or?

 

In other words, can it be hacked? 

[ewitte]

3 minutes ago, Mark Kaine said:

Is this done through vbios or?

 

In other words, can it be hacked? 

Possibly I'm one to view anything that is accessible to be hackable.  Usually there is a reason for those decisions you will likely need to improve cooling for it to not be an issue.  Sometimes it is more of a battery life decision though.

[Agall]

1 hour ago, ewitte said:

Possibly I'm one to view anything that is accessible to be hackable.  Usually there is a reason for those decisions you will likely need to improve cooling for it to not be an issue.  Sometimes it is more of a battery life decision though.

The CPU in a gaming laptop needs a certain amount of wattage to maintain a stable framerate, I'd suspect laptop manufacturers set the GPUs max wattage availability with this in mind.

 

Its something easily demonstrated with handhelds, where stealing too much power from the CPU causes the boost clocks to be low enough to have a hard CPU limitation. The balance requirement in handhelds is more extreme than in gaming laptops, but the same theory applies when the CPU and dGPU are power sharing.

[Yochi]

4 hours ago, ewitte said:

 

Most laptop GPUs have multiple power targets which are determined by the Manufacturer when they design a model.  It can be drastic too, like a card that can run 150W but systems can be designed all the way down to 65W!  

Hwinfo64 indicates 130W as GPU ppt limit, gpu core wattage also peaks at around 120W at the start of a benchmark then it stabilizes at 95W range as temperature reaches 82C, i'm thinking maybe thermal paste doesn't provide enough heat dissipation. but i'm not sure since neither wattage nor temps are going up.

[ewitte]

3 hours ago, Yochi said:

Hwinfo64 indicates 130W as GPU ppt limit, gpu core wattage also peaks at around 120W at the start of a benchmark then it stabilizes at 95W range as temperature reaches 82C, i'm thinking maybe thermal paste doesn't provide enough heat dissipation. but i'm not sure since neither wattage nor temps are going up.

Paste may help but the actual heatsink area, heatpipes, etc is likely fairly limited especially on smaller devices.

[191x7]

Check the Windows power profile.

Use the latest drivers and the latest bios.

Check if your power adapter is strong enough. If the laptop was bundled with a 95W charger, there might be a benefit of obtaining a 120W one.

[Mark Kaine]

17 hours ago, Yochi said:

Hwinfo64 indicates 130W as GPU ppt limit, gpu core wattage also peaks at around 120W at the start of a benchmark then it stabilizes at 95W range as temperature reaches 82C, i'm thinking maybe thermal paste doesn't provide enough heat dissipation. but i'm not sure since neither wattage nor temps are going up.

But that's typical for throttling, temp doesn't go up because wattage gets limited in order to keep the temp stable...

 

Most GPUs max out at like 80-85c, any higher and something has to give, frequencies, wattage, etc...

 

For example my 4070 mobile has a limit of 87c, but it usually stays around 80-82... That's all I need to know and I honestly prefer that over 87c + hard throttling...  

 

 

[LOST TALE]

2 hours ago, Mark Kaine said:

But that's typical for throttling, temp doesn't go up because wattage gets limited in order to keep the temp stable...

 

Most GPUs max out at like 80-85c, any higher and something has to give, frequencies, wattage, etc...

 

For example my 4070 mobile has a limit of 87c, but it usually stays around 80-82... That's all I need to know and I honestly prefer that over 87c + hard throttling...  

 

 

I doubt the laptop auto increases the gpu wattage when the cpu doesn't need it. and 90% of games need 35% of the power reserved for the worst case.

If you're thinking this deep (edit enough to create this topic), maybe a laptop isn't the best choice (vs Desktop + lower power laptop combo).