I7 8750h optimization = 31% performance improvement?

[kevinisbeast707]

So I recently purchased a Dell g7 with a gtx 1060 max q and an i7 8750h. As I began playing gta v, I noticed that when I overclocked the gpu I would thermal throttle both the cpu and the gpu. The cpu would throttle to between 3.6 and 3.8Ghz and the gpu would throttle down to 1607Mhz. I remembered that I had heard something about messing with voltages and turbo boost times/powers to optimize mobile cpus. I had tried this on an i5 7200u and it was totally pointless. I decided to give it a shot anyways, and wow. Running just cinebench by itself, I was initially disappointed by my 100mv under volt since there were no thermal differences. However, clock speeds stayed near 3.9Ghz for the entirety of the run. I noticed that the cpu was power throttling still so I decided to under volt it by 150mv. That run I stayed at 3.9Ghz for the entire time (if i ran consecutive runs it would power throttle). So I set the turbo boost power max to 75w and the turbo boost short power max to 80w. No throttling this time and temps were still reasonable. The most remarkable thing though was the performance gain. I went from a multi threaded score of 919cb to a whopping 1205cb only by under volting and adjusting turbo boost power limits. That's a 31% performance improvement for giving the cpu less power. Awesome. I'm going to keep messing around with the voltage and see how low I can get it!

 

Update: at -175mw and 55w max turbo I was able to get 0 throttling with it remaining at a steady 3.914Ghz during GTA v gameplay. The temps went down from 99 to the mid to high 70s - low 80s. The GPU now is up to 1776mhz from 1607mhz and occasionally boosts to 1860mhz.

 

Just thought I'd share that with you guys and let me know if anybody else has any experience with optimizations giving you huge performance gains in either raw power or temperatures.

 

 

Also idk why it thinks I have windows 8... It tried I guess...

 

 

Could a mod move this to the cpu thread. I forgot to place it in there initially because I'm dumb...

[Jurrunio]

What is the single core score?

[kevinisbeast707]

42 minutes ago, Jurrunio said:

What is the single core score?

Single core is 172 both before and after.

[Jurrunio]

40 minutes ago, kevinisbeast707 said:

Single core is 172 both before and after.

Phew, at least my overclocked desktop CPU didnt get beaten by a laptop locked CPU entirely.

[kevinisbeast707]

On 5/30/2018 at 6:25 AM, Jurrunio said:

Phew, at least my overclocked desktop CPU didnt get beaten by a laptop locked CPU entirely.

My overclocked r5 1600 gets beaten in single core handily and it's only like 50 points ahead in multi. What kind of scores are you getting on the 2600k?

 

Also, rip to my dell g7  It has always had some speaker crackling and popping issues but now it's been spitting out bsod errors even with everything set back to stock. Guess it's back to best buy

[Jurrunio]

1 hour ago, kevinisbeast707 said:

My overclocked r5 1600 gets beaten in single core handily and it's only like 50 points ahead in multi. What kind of scores are you getting on the 2600k?

170cb single core because it can reach 5Ghz, but only 780cb multicore at 4.5GHz

[Emberstone]

That CPU is basically a Ryzen 5 1600 with better single-core speed after those adjustments. That's impressive af.

[kevinisbeast707]

On 5/30/2018 at 10:03 PM, Emberstone said:

That CPU is basically a Ryzen 5 1600 with better single-core speed after those adjustments. That's impressive af.

Yeah it's pretty bonkers. Who would've thought that lowering voltage could increase performance. It really is a good processor for mobile use.

 

On 5/30/2018 at 9:53 PM, Jurrunio said:

170cb single core because it can reach 5Ghz, but only 780cb multicore at 4.5GHz

That's pretty good! I had to upgrade to at least the 1600 because the fx4300 my friend had given me was both stupidly slow and I also killed it overclocking... I got the record on userbenchmark for a while at 5.1Ghz but It was definitely thermal throttling at that point

[eric wen]

Hi , I bought Dell G7 recently. I tried to set Intel XTU to boost performance.

 

Unfortunately, I can't boost my G7.

 

Would you show me your XTU setting or other tool you used to boost performance?

 

Thank you for your kindly help!!

 

Best Regard!

[undervolter0x0309]

1269 on Multicore Cinebench R15

[kevinisbeast707]

On 6/27/2018 at 3:14 AM, eric wen said:

Hi , I bought Dell G7 recently. I tried to set Intel XTU to boost performance.

 

Unfortunately, I can't boost my G7.

 

Would you show me your XTU setting or other tool you used to boost performance?

 

Thank you for your kindly help!!

 

Best Regard!

Unfortunately I already took back my g7 since it had some hardware issues, but I didn't actually boost clocks at all. If you go to the cpu settings, there are settings for power management. What I did was I pushed the turboboost time max all the way up, then I adjusted the turbopower max which isn't entirely necessary as with the g7's cooling solution I found it overall better to just undervolt. You can adjust the turbo power long to about 5 to 10 watts higher depending on how much you can undervolt your chip. The biggest part of this is by far the undervolting though. That will have offsets. You'll want to start out small at like -0.05v and try to go down in as small of increments as your sanity can handle. I was able to get mine down to -0.175v before mine became unstable. While usually voltage is increased to increase cpu clockspeed, what you'll be doing it for is to lower cpu temperature and power draw. This lowered power draw and thermals will allow the cpu to boost higher for longer. So instead of only boosting to like 3.2Ghz during stress loads, it can boost to its max boost either for long enough to get better cinebench or preferably indefinitely.

 

Hope this helps and I'll be happy to answer any more questions.

Cheers!

 

On 6/27/2018 at 7:28 PM, undervolter0x0309 said:

1269 on Multicore Cinebench R15

Ooooo nice! Did you tweak it at all?

Edited July 2, 2018 by kevinisbeast707
Picture of xtu.

[kevinisbeast707]

On 5/30/2018 at 7:53 PM, Jurrunio said:

170cb single core because it can reach 5Ghz, but only 780cb multicore at 4.5GHz

So you're going to love this. I applied the same methodology to an i5 8250u in an acer spin 5 and I got a similar percentage increase up to 28.6% improvement. The really impressive part is that that put the multicore score all the way up to 688pt. Thats not too bad for a low voltage mobile chip. 

[Jurrunio]

19 minutes ago, kevinisbeast707 said:

So you're going to love this. I applied the same methodology to an i5 8250u in an acer spin 5 and I got a similar percentage increase up to 28.6% improvement. The really impressive part is that that put the multicore score all the way up to 688pt. Thats not too bad for a low voltage mobile chip. 

time to overclock more then

[NavvJatt]

On 5/30/2018 at 2:45 AM, kevinisbeast707 said:

So I recently purchased a Dell g7 with a gtx 1060 max q and an i7 8750h. As I began playing gta v, I noticed that when I overclocked the gpu I would thermal throttle both the cpu and the gpu. The cpu would throttle to between 3.6 and 3.8Ghz and the gpu would throttle down to 1607Mhz. I remembered that I had heard something about messing with voltages and turbo boost times/powers to optimize mobile cpus. I had tried this on an i5 7200u and it was totally pointless. I decided to give it a shot anyways, and wow. Running just cinebench by itself, I was initially disappointed by my 100mv under volt since there were no thermal differences. However, clock speeds stayed near 3.9Ghz for the entirety of the run. I noticed that the cpu was power throttling still so I decided to under volt it by 150mv. That run I stayed at 3.9Ghz for the entire time (if i ran consecutive runs it would power throttle). So I set the turbo boost power max to 75w and the turbo boost short power max to 80w. No throttling this time and temps were still reasonable. The most remarkable thing though was the performance gain. I went from a multi threaded score of 919cb to a whopping 1205cb only by under volting and adjusting turbo boost power limits. That's a 31% performance improvement for giving the cpu less power. Awesome. I'm going to keep messing around with the voltage and see how low I can get it!

 

Update: at -175mw and 55w max turbo I was able to get 0 throttling with it remaining at a steady 3.914Ghz during GTA v gameplay. The temps went down when the GPU is overclocked from 99 to the mid to high 70s - low 80s. The GPU now is up to 1776mhz from 1607mhz and occasionally boosts to 1860mhz?.

 

Just thought I'd share that with you guys and let me know if anybody else has any experience with optimizations giving you huge performance gains in either raw power or temperatures.

 

 

Also idk why it thinks I have windows 8... It tried I guess...

 

 

Could a mod move this to the cpu thread. I forgot to place it in there initially because I'm dumb...

hey i was wondering what turbo power boost does? i just got a laptop with i7 8750h with gtx 1070, i rarely have any problem with temps but I still want to under volt and try turbo power boosting my cpu.

[FinnishArmy]

So, I have a small follow up on this thread. I followed your steps, however, I did some of my own tweaking. I decreased the core voltage by -0.125volts, which drastically decreased temps from 80-90c down to around 60-70c. Then I changed my turbo boost power max to 90watts and the turbo boost short power max to 115 watts, high enough before thermal throttling. Then finally increased turbo boost power time window all the way to the max of 96 seconds cause I can, no thermal throttling, so no issues there. I managed to beat your score by roughly 50 points, not much but still 

 

 

[kevinisbeast707]

On 9/25/2018 at 12:38 AM, FinnishArmy said:

So, I have a small follow up on this thread. I followed your steps, however, I did some of my own tweaking. I decreased the core voltage by -0.125volts, which drastically decreased temps from 80-90c down to around 60-70c. Then I changed my turbo boost power max to 90watts and the turbo boost short power max to 115 watts, high enough before thermal throttling. Then finally increased turbo boost power time window all the way to the max of 96 seconds cause I can, no thermal throttling, so no issues there. I managed to beat your score by roughly 50 points, not much but still 

 

 

Nice!! I didn't want to mess with the short power settings since I was already having problems with short term thermals spiking really high. This is exactly how to "not overclock but get more performance" from a laptop. The -.125v is really awesome! Wonder what would happen if you raised the long term power max and strapped a liquid cooler to the cpu  lol.

[kevinisbeast707]

On 9/3/2018 at 11:04 PM, NavvJatt said:

hey i was wondering what turbo power boost does? i just got a laptop with i7 8750h with gtx 1070, i rarely have any problem with temps but I still want to under volt and try turbo power boosting my cpu.

Hey sorry for the late reply, I've been busy with school and work. But to answer your question the turbo short power max allows you to boost or limit how much power your cpu is allowed to pull over your turbo power time limit. The regular turbo boost power max allows you to change how much power your cpu is allowed to pull indefinitely. So what you may see more in ulv cpu's like the 8250u is that even though you aren't thermal throttling, your clock speeds may still be lowering because the cpu is power throttling since it is trying to consume more than the turbo boost power max is allowing it by default. This can happen on any laptop cpu so if you are not being thermal throttled, I would recommend looking into decreasing cpu voltage and increasing turbo boost power max slightly. You may get something like 200-300ish Mhz out of it.

[megafatpanda]

I just recently learned undervolting and it says to lower the temperature of the laptop, so I tried to undervolt my g7 core and cache.

at first I think I lowered it too much and my games keep crashing, like the witcher III, monster hunter world and even pubg I was getting frustrated.

after a few hours of pressing the offset voltage we finally came to an agreement of -151.4 mV for the CPU core and cache.

My usual 95c temp dropped down drastically while playing AAA games in the 80c'sh  ahh the magic of undervolting.

 

[EspinalAndres]

How can you overclock that cpu, isn´t it locked? or is it just Voltages?

[megafatpanda]

10 hours ago, EspinalAndres said:

How can you overclock that cpu, isn´t it locked? or is it just Voltages?

It has a Turbo speed of up to 4.1 GHz,

 

I don't know how it works but if you undervolt it, the cpu goes Vrooom Vroom with lower temps.

[kevinisbeast707]

12 hours ago, EspinalAndres said:

How can you overclock that cpu, isn´t it locked? or is it just Voltages?

Lol so how it works on locked processors, especially mobile ones is that they are given a specific power curve that determines how many volts to throw at a cpu given its clock speed. The main limiting factor is usually either thermal output or power intake. The cpus are only designed to use lets say 45w once turbo boost time has been passed, so once the bios tells them that they can no longer pull the amount of power allotted to them for turbo boost speeds, they throttle back so they can use less power lets say to 3.7Ghz from a boost of 4.1Ghz. They do this by lowering their voltage which has a corresponding clock speed decline which is preset on the cpu's power table. By using a tool like xtu to manually lower voltage offsets across the board, the amount of voltage that a cpu will use at a given clock speed is reduced which means that overall power consumption is reduced since watts= volts x amps. In this situation then the cpu while pulling 45w can now push lets say 3.9Ghz instead of 3.7Ghz. While this may be a small improvement it can actually be a part of a larger improvement to temperatures. As has been mentioned in this thread a few times, the Dell g7 does like to thermal throttle, so instead of being limited by the cpu's target of 45w which would push the clocks down to 3.7Ghz, now the cpu is also being limited by temperature which can cause the cpu to more wildly dip in clocks. So now while drawing the same amount of power or even maybe less than 45w, the cpu might be thermal throttling down to perhaps 3.4-3.5Ghz. Well now by undervolting we are lowering the amount of overall power the cpu is using and since applying voltage to a cpu gives an exponential rise in temperatures, we have also lowered temperatures which will now allow the cpu to stay boosted at 3.9ghz. In this situation we have boosted pure cpu clock speeds by a whopping 15% or more depending on the workload. This also has the added effect of letting our gpu boost higher in this case since I believe the g7 did have a shared heatpipe. Now another thing you can do to mobile cpus is boost their allowed power. So then by undervolting you are controlling thermal output so that the cpu doesn't thermal throttle but allowing it to pull more than 45w so now it can stay boosted at 4.1Ghz indefinitely. Or at least in theory as usually once you raise the allowed power draw the thermals will rise to thermal throttling territory but it is useful for benchmarking runs where tests usually have a shorter length. 

 

Also sorry for this being so long it's just been a while since I've gotten to completely nerd out to people who actually understand what I'm talking about

[kevinisbeast707]

19 hours ago, megafatpanda said:

I just recently learned undervolting and it says to lower the temperature of the laptop, so I tried to undervolt my g7 core and cache.

at first I think I lowered it too much and my games keep crashing, like the witcher III, monster hunter world and even pubg I was getting frustrated.

after a few hours of pressing the offset voltage we finally came to an agreement of -151.4 mV for the CPU core and cache.

My usual 95c temp dropped down drastically while playing AAA games in the 80c'sh  ahh the magic of undervolting.

 

Those are some impressive numbers. That's pretty much doing objectively better than an overclocked ryzen 5 1600 system. Very good numbers and undervolting is all about finding that sweet spot between better performance and higher stability. If you ever get into turbo power tweaking then it becomes even more of a fine tuning process where you have to balance three things at which point you are riding the line of thermal throttling, stability, and performance but I feel that you could end up with a score of probably around 1300 given how well your chip is already performing at those voltages and speeds. It's always nice to see that there are other people trying to do the same thing as you with success. Congratulations on successfully unlocking some free performance on your laptop

[megafatpanda]

4 hours ago, kevinisbeast707 said:

Those are some impressive numbers. That's pretty much doing objectively better than an overclocked ryzen 5 1600 system. Very good numbers and undervolting is all about finding that sweet spot between better performance and higher stability. If you ever get into turbo power tweaking then it becomes even more of a fine tuning process where you have to balance three things at which point you are riding the line of thermal throttling, stability, and performance but I feel that you could end up with a score of probably around 1300 given how well your chip is already performing at those voltages and speeds. It's always nice to see that there are other people trying to do the same thing as you with success. Congratulations on successfully unlocking some free performance on your laptop

I was trying to study how the turbo tweaking works and as I went further I saw lots of numbers which scared the hell out of me, 

I never thought that messing with my laptops inner works could be fun. 

Even though I get the gist of how tweaking the turbo works, the words my grandpa always told me sticks in my head "if it ain't broken don't fix it"

for now I'll stick with the safe bet and try to not blew up my laptop, if ever the need arise and my fps disappoints I know

there's still another method I can try to Frankenstein my laptop, I still have turboooo! 

 

[Delaware]

Hey guys,

 

I'm sorry if I'm writing to the wrong topic, but I need some help. I have a Dell G5 (8750H, 1050Ti), and I started to experience the thermal throttling while playing AC Odyssey, 98 degrees FTW (didn't even know about the phenomenon  until a few days ago :D). I tried to undervolt my CPU, but it didn't helped too much. Today i bought a laptop cooler, same results. I will attach some pics (CB results with the following settings), I hope you will find where I'm mistaken. 

[megafatpanda]

23 hours ago, Delaware said:

Hey guys,

 

I'm sorry if I'm writing to the wrong topic, but I need some help. I have a Dell G5 (8750H, 1050Ti), and I started to experience the thermal throttling while playing AC Odyssey, 98 degrees FTW (didn't even know about the phenomenon  until a few days ago :D). I tried to undervolt my CPU, but it didn't helped too much. Today i bought a laptop cooler, same results. I will attach some pics (CB results with the following settings), I hope you will find where I'm mistaken. 

Hello, Would like to know if the bios version you have is 1.4 or 1.5 cause it's best if you would just retain the 1.2 or 1.3 version of the bois. 

the 1.4 and 1.5 decrees the speed of the fans I don't know how it happened but it did. it's best if you can bring the bios version back to 1.2 or 1.3

 

if all else fails re apply thermal paste some laptops have bad paste out of the box. find a good thermal paste e.g Arctic MX-4 or NT-H1 and the expensive stuff "Thermal Grizzly Kryonaut"

Edited November 24, 2018 by megafatpanda
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