i7-8750H Underperforming and Throttling

[unclewebb]

Post some screenshots of how you have ThrottleStop setup. When running Cinebench R20, keep an eye on ThrottleStop. Can you maintain the 39.00 multiplier or are you seeing throttling during this test? Open up Limit Reasons. Is it PL1 or PL2 power limit throttling or maybe thermal throttling? There might still be another couple of hundred Cinebench points to be uncovered.

A well cooled 8750H with unlocked power limits can go over 3000 in Cinebench R20.

kill4l`s Cinebench - R20 score: 3147 cb with a Core i7 8750H

The Core i7 8750H @ 3891MHzscores getScoreFormatted in the Cinebench - R20 benchmark. kill4lranks #385 worldwide and #2 in the hardware class. Find out more at HWBOT.

hwbot.org

 

[SmoothOperator]

Where would I find the multiplier?

 

[unclewebb]

In the FIVR window, check the Disable and Lock Turbo Power Limits box. In the TPL window set the Turbo Boost Long Power Max to 70. Run Cinebench R20 and watch the Limit Reasons window. Does PL1 power limit throttling light up in red? What does ThrottleStop report for power consumption when this happens?

Some laptops allow you to go beyond the 45W TDP rating. These are the laptops that are scoring over 3000 points in Cinebench. If your laptop enforces a 45W limit, then you are probably very close to your peak. It is impossible to get full performance out of the 8750H with poor cooling or if it has locked power limits.

Where would I find the multiplier?

The FID column in the monitoring table on the main screen. 39.00 is the max when an 8750H has 6 cores active.

There is usually no reason to check TDP Level Control.

I would check the Turbo Boost Short Power Max box just to make sure that this info goes to the CPU. I know some guides recommend leaving this unchecked but there is no reason to do that.

 

[SmoothOperator]

Just ran a 2813, score and TS log attached.

Note, these do not include the recommended changes above, will make them now and run again.

 

[unclewebb]

Your Cinebench score is heading in the right direction but it looks like your performance is going to be either power limited or thermal throttling limited. The heatsink and fan are struggling at the 60W level. Your CPU can only run at the full 39.00 multiplier for a few seconds before it starts to thermal throttle. Might have to do some surgery. A thorough cleaning inside and start watching videos on replacing the thermal paste if you have not done that before on a laptop.

 

[SmoothOperator]

Yep looks like its both. Updated log attached.

 

[unclewebb]

If you set ThrottleStop to 70W and you are still being throttled to 45W then there is nothing you can do to get beyond that limit.

If you can improve cooling, this might help your CPU run 200 MHz or 300 MHz faster for the first 30 seconds or so but ultimately, the 45W power limit is still going to kick in.

At least your laptop is running a little better compared to when you first started with ThrottleStop.

 

[SmoothOperator]

Agreed, next step is to do a tear down of the cooling system, re-paste and clean out the airstreams.

I saw a few posts at the beginning about thermal pastes, Thermal Grizzly seems like overkill. What would you generally recommend?

I also have the laptop elevated 1" above the surface with washers, what type of performance increase would you see from the fan assisted cooling pads on the market? Something like this

And most importantly, I would like to convert my displayport connection for the laptop screen to an external connection so I can get G-sync working for my LG OLED. I know this means the laptop screen will no longer function, but I think it would be a fun project to try and convert the existing wiring harness and make it compatible for external connections. I'm not concerned about bricking this laptop, still buying time before I drop 2,500 on a new desktop. My current desktop is skylake and I dont see a point in upgrading it to RTX 30 since the mobo would be so outdated and need replacement anyway. Which is why I'm gaming on this laptop. But yea no concerns about warrantee lol.

 

[netsoe]

hi everyone.I have Razer blade 15 2018 i7-8750H. i noticed is that when the cpu is running all cores at 100% load, the pacakge tdp is only 25W despite the rated tdp at 45W.I had throttlestop 9.0 installed.Changing the package power limit also didn't help. I changed it to 70W but it only reaches a max of 25W TDP when running cinebench.Please help me out.P.S no Power &thermal throttle at all.

 

[unclewebb]

the pacakge tdp is only 25W

Your screenshot shows max power consumption was 36W.

You have lowered your maximum CPU speed and voltage so that is going to reduce your maximum power consumption a little. Why not set your turbo ratios and Speed Shift Max value back to their default values? 41, 41, 40, 40, 39, 39 for the turbo ratios and 41 for Speed Shift Max. Are you running Cinebench R20? Are you running any Razer CPU control software. Some factory software has a silent mode. These typically use power limit throttling to lower maximum power consumption.

Start by downloading ThrottleStop 9.2. Exit ThrottleStop and you can copy the new ThrottleStop.exe into your ThrottleStop folder so it uses your current settings. Turn on the Log File option before you start running Cinebench. When Cinebench R20 is finished running, exit ThrottleStop so it can finalize your log file. It will be located in your ThrottleStop / Logs folder with today's date in its name. Attach it to your next post so I can have a look. It will automatically include reasons for throttling in the log file.

 

[netsoe]

Your screenshot shows max power consumption was 36W.

You have lowered your maximum CPU speed and voltage so that is going to reduce your maximum power consumption a little. Why not set your turbo ratios and Speed Shift Max value back to their default values? 41, 41, 40, 40, 39, 39 for the turbo ratios and 41 for Speed Shift Max. Are you running Cinebench R20? Are you running any Razer CPU control software. Some factory software has a silent mode. These typically use power limit throttling to lower maximum power consumption.

Start by downloading ThrottleStop 9.2. Exit ThrottleStop and you can copy the new ThrottleStop.exe into your ThrottleStop folder so it uses your current settings. Turn on the Log File option before you start running Cinebench. When Cinebench R20 is finished running, exit ThrottleStop so it can finalize your log file. It will be located in your ThrottleStop / Logs folder with today's date in its name. Attach it to your next post so I can have a look. It will automatically include reasons for throttling in the log file.

Yes I running Cinebench R20.I used Razer Synapse app for gaming mode which is CPU or GPU boost. Otherwise power limit throttling occurs on balanced mode.Ok I set turbo ratios and Speed Shift Max value back to their default values.Here is result.

 

[unclewebb]

Yes, you have power limit throttling at 25W. That might be part of a built in safety mechanism where your laptop forces a lower power limit after it has been thermal throttling for a while. Some Razer laptops can force power limits lower than what ThrottleStop allows you to set. Intel CPUs have multiple power limits. If the EC wants to set a low ball power limit, it wins.

Your biggest problem is thermal throttling. At the moment, your heatsink and fan are completely inadequate. When your 45W CPU is only at 30W, it is already overheating and thermal throttling. The thermal paste needs to be reapplied to see if this can improve your temperatures. Razer does not have a reputation for using robust heatsinks.

Your undervolt settings are way too conservative. Why are you using those settings? For a typical 8750H, I would start with the cache at -100 mV and the core at -150 mV. If you are stable there I would slowly bump the core towards -200 mV or a little beyond that. You need to do whatever you can to control your CPU temperatures. Your CPU will still overheat because of the crappy heatsink but it should not be quite as bad.

 

[HenryCase]

I've caught the bug, so I might be biased, but absolutely do the re-paste as suggested above with a quality thermal paste (I personally like Kingpin KPx for a more long-term usage, but I've had success with Thermal Grizzly Kryonaut as well, but that typically requires a re-paste more frequently) before you start tinkering with the suggested settings above, this might save you some valuable time when dialing in those perfect numbers

 

[aa1996s]

The 8750H has a 45W TDP rating but it also has a 35W Configurable TDP-low mode.

Intel® Core™ i7-8750H Processor (9M Cache, up to 4.10 GHz) Product Specifications

Intel® Core™ i7-8750H Processor (9M Cache, up to 4.10 GHz) quick reference guide including specifications, features, pricing, compatibility, design documentation, ordering codes, spec codes and more.

ark.intel.com

It looks like your CPU is getting forced into low power 35W mode. Few manufacturers use this feature but any OEM has the option to use this. In the ThrottleStop TPL window you can try checking the TDP Level Control box. When Cinebench R20 is running, try changing this from 0 to 1 to 2 if those values are supported. The problem is that the TDP Level Control can be set in multiple locations that ThrottleStop does not have access to. Without access to hardware with this issue, I never got around to solving this problem.

Have a look in the Device Manager for the Intel dynamic platform and thermal framework driver. This driver might be forcing your CPU into 35W mode. Do some Google searching about ways to disable and uninstall this driver. There are a few tricks you have to do to prevent this driver from being reinstalled again and again.

Also look into some of the hidden options in the Windows Power Plan you are using. The TDP Level and wattage value can be hiding in there. In a command window use,

powercfg -qh >C:\power.txt

This will create a fill called power.txt and it will be in your main C: directory. Attach it to your next post and I will have a look to see if I can find this setting.

Also try switching to different Windows power profiles while Cinebench is running. Maybe only one power plan is screwed up.

I think HWiNFO can report what TDP Level your CPU is operating in.

The 8750H has a 45W TDP rating but it also has a 35W Configurable TDP-low mode.

Intel® Core™ i7-8750H Processor (9M Cache, up to 4.10 GHz) Product Specifications

Intel® Core™ i7-8750H Processor (9M Cache, up to 4.10 GHz) quick reference guide including specifications, features, pricing, compatibility, design documentation, ordering codes, spec codes and more.

ark.intel.com

It looks like your CPU is getting forced into low power 35W mode. Few manufacturers use this feature but any OEM has the option to use this. In the ThrottleStop TPL window you can try checking the TDP Level Control box. When Cinebench R20 is running, try changing this from 0 to 1 to 2 if those values are supported. The problem is that the TDP Level Control can be set in multiple locations that ThrottleStop does not have access to. Without access to hardware with this issue, I never got around to solving this problem.

Have a look in the Device Manager for the Intel dynamic platform and thermal framework driver. This driver might be forcing your CPU into 35W mode. Do some Google searching about ways to disable and uninstall this driver. There are a few tricks you have to do to prevent this driver from being reinstalled again and again.

Also look into some of the hidden options in the Windows Power Plan you are using. The TDP Level and wattage value can be hiding in there. In a command window use,

powercfg -qh >C:\power.txt

This will create a fill called power.txt and it will be in your main C: directory. Attach it to your next post and I will have a look to see if I can find this setting.

Also try switching to different Windows power profiles while Cinebench is running. Maybe only one power plan is screwed up.

I think HWiNFO can report what TDP Level your CPU is operating in.

press lock too ? i have the same i7 8750h and the same problem

The 8750H has a 45W TDP rating but it also has a 35W Configurable TDP-low mode.

Intel® Core™ i7-8750H Processor (9M Cache, up to 4.10 GHz) Product Specifications

Intel® Core™ i7-8750H Processor (9M Cache, up to 4.10 GHz) quick reference guide including specifications, features, pricing, compatibility, design documentation, ordering codes, spec codes and more.

ark.intel.com

It looks like your CPU is getting forced into low power 35W mode. Few manufacturers use this feature but any OEM has the option to use this. In the ThrottleStop TPL window you can try checking the TDP Level Control box. When Cinebench R20 is running, try changing this from 0 to 1 to 2 if those values are supported. The problem is that the TDP Level Control can be set in multiple locations that ThrottleStop does not have access to. Without access to hardware with this issue, I never got around to solving this problem.

Have a look in the Device Manager for the Intel dynamic platform and thermal framework driver. This driver might be forcing your CPU into 35W mode. Do some Google searching about ways to disable and uninstall this driver. There are a few tricks you have to do to prevent this driver from being reinstalled again and again.

Also look into some of the hidden options in the Windows Power Plan you are using. The TDP Level and wattage value can be hiding in there. In a command window use,

powercfg -qh >C:\power.txt

This will create a fill called power.txt and it will be in your main C: directory. Attach it to your next post and I will have a look to see if I can find this setting.

Also try switching to different Windows power profiles while Cinebench is running. Maybe only one power plan is screwed up.

I think HWiNFO can report what TDP Level your CPU is operating in.

omg its right i feel a better performance, , my cpu have good performance , and now it is not on 0% cpu usage so much times more better than before , thnks , what more can i do to full xperience on this good luck performance, i want to get de full possible , and thnnks you so mucho bro xclent work great

press lock too ? i have the same i7 8750h and the same problem

omg its right i feel a better performance, , my cpu have good performance , and now it is not on 0% cpu usage so much times more better than before , thnks , what more can i do to full xperience on this good luck performance, i want to get de full possible , and thnnks you so mucho bro xclent work great

 

[aa1996s]

The 8750H has a 45W TDP rating but it also has a 35W Configurable TDP-low mode.

Intel® Core™ i7-8750H Processor (9M Cache, up to 4.10 GHz) Product Specifications

Intel® Core™ i7-8750H Processor (9M Cache, up to 4.10 GHz) quick reference guide including specifications, features, pricing, compatibility, design documentation, ordering codes, spec codes and more.

ark.intel.com

It looks like your CPU is getting forced into low power 35W mode. Few manufacturers use this feature but any OEM has the option to use this. In the ThrottleStop TPL window you can try checking the TDP Level Control box. When Cinebench R20 is running, try changing this from 0 to 1 to 2 if those values are supported. The problem is that the TDP Level Control can be set in multiple locations that ThrottleStop does not have access to. Without access to hardware with this issue, I never got around to solving this problem.

Have a look in the Device Manager for the Intel dynamic platform and thermal framework driver. This driver might be forcing your CPU into 35W mode. Do some Google searching about ways to disable and uninstall this driver. There are a few tricks you have to do to prevent this driver from being reinstalled again and again.

Also look into some of the hidden options in the Windows Power Plan you are using. The TDP Level and wattage value can be hiding in there. In a command window use,

powercfg -qh >C:\power.txt

This will create a fill called power.txt and it will be in your main C: directory. Attach it to your next post and I will have a look to see if I can find this setting.

Also try switching to different Windows power profiles while Cinebench is running. Maybe only one power plan is screwed up.

I think HWiNFO can report what TDP Level your CPU is operating in.

I was looking for this value that he sent me to place through windows + r, so I put where you told me, but nothing appears where you told me it was going to be. yes I have processor power management, in the windows power control panel, it appears in change power plan setting.




View attachment 203398





This is power processor management . Thnks you , oh , my speed shift - EPP is on 84 , on throttlestop