[Guide] How to take full control of the i7-8750H (Advanced version)

I haven't actually come across this though, but I was thinking you were using an unlocked bios at first to reach that many options that's why I asked that if you are using a modded bios, but oh well the IMON page isn't available.

I believe the Lenovo bios has some protection to it that you needed an SPI-programmer to get the modified bios in if you happened to modify one.

Edit: You can tried what SubliminaL1989 stated here: https://www.reddit.com/r/Lenovo/comments/bag1ck/anyone_got_to_the_advanced_mode_on_the_insydeh2o/

See if it works.

 

Followed the RAM overclocking guide and got some extra performance. Unfortunately my RAM kit in the GE75 9SF with 9880H proved to be terrible in OC department. No matter what I do, I cannot get the kit to climb over the default 2666 speed. Upping cache/SA voltage, relaxing timings, even upping DIMM voltage has no results. It would boot but will always produce errors during memtest/AIDA64 memory tests.

What I was able to achieve is to drop the stock timings to 17-17-17-44 with 1CR along with the suggestion to up the read speeds. I had to up the ring voltage by 20mV because I noticed that if the ring voltage was too low, the performance would tank in latency and speeds. So settled on -75mV to the cache. Now have sub 50ns vs mid 70 ns latency with consistent 40K mb on read and copy with write being at 45K mb. Not bad for free gains while retaining my under voltage settings.

Interestingly upping ring voltage to 120mV and doing some stress testing added on average 5C to my CPU temps. I think I'll stick with my RAM being slightly slower compared to some people flexing 3400+ around here but retaining more boost headroom.

 

Yep this is one way of thinking.

However, did you try upping the tRFC by a larger amount to see if it fixes the errors?

 

Yep. No matter what I'd do as instructed in your post it would always produce errors. Only 2666 is stable with no errors and even my primary timings aren't that great. 17CL at 2666 is pretty lackluster. The great thing about this experience is that its easy to tell when you're undervolting or not giving enough voltage to the ring/LLC. Going from mere -75mV to -85mV for me would add to my latency 10ns and regress my read and copy speeds to 35K vs 40K each. This was measured on consistent basis, and it kept reoccurring run after run until I upped the voltage.

Anything more than -75mV into the positive range would keep my speeds and latency consistent within the 5% error margin for all measured values.

 

i tried hackness's exact RAM OC settings on a GE75 8750h 16gb dual samsung ram (sticks came with the laptop) and it worked, in case anyone wants to try too.

 

So I've managed to get the Overclocking Perfomance Menu & Memory Overclocking Menu to show in my RB15 BIOS but all of the timings say 0 ... is there a fix for this?

 

When you say "Ring" do you mean "Uncore" in BIOS?

 

Uncore. I did not alter any voltages in the BIOS. Everything done through ThrottleStop.

 

@hackness

Do you think it might be possible to get 3466mhz at a lower CL if we feed it more voltage? I got it to boot once on CL19-21-21-56 but I'm not sure if that is faster or slower than CL20-20-20-45 (current.)

EDIT: Also, with all these new BIOS options unlocked is it possible to feed the CPU on this thing 103mhz BCLK?

 

Uncore is 'system agent voltage' aka VCCSA on desktops, but it doesn't help that at one time, people called 'uncore' the cache (ring) ratio/voltage.

 

Hi, not sure about the voltage part,

but simple way to compare the latency is to calculate with the following formular:

CL x 2000 ÷ Frequency = ns

For example,

mind is 3467 at CL19,

19 x 2000 ÷ 3467 = 10.96ns

And its latency is lower than when I had it on 3200 CL18,

18 x 2000 ÷ 3200 = 11.25ns

Lower means better.

Edit: For the BCLK part I believe it has something to do with the CPU microcode. I haven't tried it myself so I can't comment on this.

 

Damn dude, what timings did you use to get down to CL19? In your post/sig it says CL20.

 

I did some testing, 19 was working for me

 

Not bad at all! My system won't boot even if I leave the rest on "Auto" and try 19-20-20-Auto.

 

Hi everyone! nice results!
Im trying to get in to the memory overclock game myself.


I have two of those sticks, I got unlocked bios in Asus GL703GM, which has possibility to change ram timings.
Has anyone else here played with 703 series laptops with unlocked bios? some tips would be amazing.
I have applied coollaboratory liquid metal to cpu (not gpu)
My undervolt is -180mV and it's possible to undervolt to around -200mV without problems.
I was able to remove turbo limits using TS 8.71 and here is screenshot of cinebench r20



What I am asking is few tips how to start the memory overclocking, i'll add screenshot of the memory bios menu later.

video to memory menu https://drive.google.com/open?id=15ceokPtZbUbZDWUZpxEun-1KH4dgm-bB

UPDATE: atleast 2933mhz @ 16-16-16 is stable @ 1.35 propably a lot lower voltage can be achieved too? back to testin ->

UPDATE2:
I was able to get working 3200mhz 17-17-17-44 @ 1.35v



what should I try to change to get everything perfect, i'm satisfied to 3200mhz so no need to go 3467mhz.

 

Nice post man very helpfuly. I have set trefi from 10400 to 10410. Uncore +125. And memory ratio from 10 to 11. All works good there from 2666 to 2933.If I go memory 10 to 12 the laptop need some time to turn on and all settings go to default

 

Ok finally with higher trfc works 3200.the difference from 2666 it's awesome at some games.
Cons: a little bit higher cpu temp.
2 questions for experts.
If u buy stock rams 3200 u will have that little higher cpu temps like stock overclocked?
And other question is: u will have that perfomance boost like stock rams overclocked to 3200?

 

This dude has x41 multiplier showing in his cpu-z
https://d1ebmxcfh8bf9c.cloudfront.net/u17124/image_id_2211530.png

is he able use all 6 cores @ 4100mhz? if so, then how? I really would like know.
I am able to get 3103 score @ cinebench r20 (earlier picture i posted i got 3061) with 3900mhz
what bios trick should I try to get all cores to 4100mhz.. that would be amazing =)

 

Does this guide also applies to 9750H?

I tried setting my both loadlines to 1, haven't seen a change in the heat department.. Currently running GE75-9SF. Loadline Default -140mv undervolt cache -155mv core. (-35mv with loadlines ac/dc to 1)
Set AC Loadline to 1
Set DC Loadline to 1

What am I not seeing?

 

No, he can’t. Max clock frequency will show up when not all cores is taxed. You can try increasing BCLK frequency if it’s allowed in bios or XTU.

 

what do you think, should I open those, anyone tried this method? can you bypass turbo ratio limit (I have turbo disabled at the moment and still I am at 3900mhz @ 6 cores. so maybe the answer to unlocking this cpu is not to use turbo, just change the normal ratio to 41 and then BOOM 8750h unlocked.

update: tried, no change, still ratio limit is grayed and it's 39 @ cores.

 

I wont make a difference, its locked in micro-code, and nothing rules above micro-code.

 

any way to cheat and make the motherboard "think" this 8750h is 8850h or 8950hk ?

 

Nope. You bought a none upgradeable notebook.

 

any idea for razer blade 15 9750h model to disable cfg lock? that option is not available in bios

 

unlocked bios.

 

Reflow station, 500/600$, swap the CPU, pray that it soldered correctly, and now you have an 8850h/8950HK CPU, you VRM's now may be more fire prone, but whats life without a bit of magic smoke in the morning.

Now, really, at most, you can do base clock OC, if your BIOS/ME Firmware allows it.

 

haha ok maybe in a few years reflow cpu change.. when this is becoming obselete... but for now I would like ask from you the experts, one question.

lets say I change to 105 bclk.



now:
cpu cores 105 = 4095mhz
ram = 100 * 15 = 1500 * 2 = 3000mhz -> 105 * 15 = 1500 * 2 = 3150
this one is easy, I'll change the 15 to 14 if necessary so it becomes 105 * 14 * 2 = 2940

uncore is now 38 * 100 = 3800
after that it would be 4000~ do I need to up some voltage for this?
what about other things?

 

Thing is, its rare to even be able to run at 103Mhz bclk stable, because PCIe bus among others depend on that clock, its much more usual to hit stable 102, or 101.x Mhz.

And, I'm serious, the reflow isn't the hard part, sourcing the CPU at a reasonable price and from a trusted source is the hard part.

 

So we have to wait for the chinese to start salvaging those cpu's ? ;D and those are probably not the most trusted ones :>
all right, I'm completely fine with this laptops performance.. unless I could buy super fast so- dimm ddr4 like those 3800mhz g skill sticks? what is your opinion, could this HM-370 chipset support overclocked ram all the way to the 3800mhz?
1.4v @ 3200mhz works just fine so I should have enough juice to handle the high frequency? or then I just run them at 3200hz with tight latencies.. right?

about the 8950hk part, if I find a laptop that has suffered let's say a water damage and the motherboard is fully short circuited, how often in these cases the cpu itself survives? In finland there are lot of drunk nerds who **** up their laptops daily with alcohol drinks ;D

 

Thank you for this BIOS! I had this problem too and was searching on the official owners thread and after 200 pages of reading didn't see it and posted a question. Then decided to peruse this forum and finally after 30 pages BAM! Thank you again! Will try tonight once I'm back at home with this BIOS.

 

If the CL is lower at the same frequency, technically it should be better because the latency is lower.

Usually the stock ram has higher CL when OC'd to 3200Mhz when compared to the already 3200 memory you can buy from shops.

But probably not too much of a different in the real world.

 

Your CL is pretty low, with that your latency is only 10.625ns, better than mine at CL19 3467MHz which is 10.96ns

You can try lowering the voltage, the temperature will lower a few degrees.

On mine V1.2 ~V1.25 was enough to support 3467MHz, try and see if it works on yours too.

 

Yeah I lowered to 1.25V and now I use timings: cl16-17-17 and 3000mhz

 

That's great!

 

Hello everybody, my name is Felipe. In first place, thanks to everyone who makes this post so useful.

I refer this question to Hackness given my doubts regarding his instructions for RAM OC:
I followed your instructions carefully, however I was only able to OC my stock 2666 MHz to 3000 MHz. When attempting 3200 MHz I have many errors in the TestMem5 stress test and some freezing.

My doubts are:

1) When increasing the voltage, in addition to raising the uncore voltage, should the memory voltage be increased +0.125 V too?
2) As I am suffering freezing, I follow your recommendation of adjusting tREFI, when you say 'too loose' you mean too low, right? I maxed it out but the freezing and TestMem5 stress test errors remain the same.
3) After maxing out tREFI, what is the next variable to adjust?

I attach image of my STOCK settings, which work perfectly with 3000 MHz too, just rising memory ratio to 11.

 

U tried with higher TRFC? Mine needed about 570 for works perfectly

 

Long time use and about 5 hrs per day and works very nice.at 3200mhz
Uncore +125 trfc 570 ,trefi 12500.all the rest stock 1,2 volt.
Now I got 32gb gskiils 3200mhz cl18. At xmp profile

 

Hello Greninga, in first place I tried with increasing tREFI because I was suffering freeezing, as it did not have effect I tried increasing tRFC too (even until max), but had no positive effect. Although I had no BSOD, I continue having many errors in the TestMem5 stress tests.

I have a MSI GP75 9SE, with 9750H and 2060 if it helps.

 

I've just found a workaround for this on the newest bios.

Enable XTU support in bios
Install XTU and change the CPU Flex ratio ONLY
Disable XTU service in services.msc or Uninstall XTU
Disable XTU support in bios

The flex ratio will stick with bios.

 

If you are getting error it means your tRFC is too low.

1) Not necessarily.

2) tREFI's unit is time, too loose means the number is too high, you should lower tREFI to eliminate the freezing, not the other way.

3) Try lowering the tREFI first.

 

Hello everybody. This is my result after applying the guide for my cheaper ram, samsung c-die 2400. Is it good? can I get more?

 

Getting some super tight timings dialed in on this new RB17 Pro with no signs of locking up yet - how far will it go!?

 

Awesome!

Usually after tuning, once the memory software test is done.

I'll use the laptop normally and see if there's any sign of freezing or errors within 2 weeks time.

 

Anyone know if this works similarly on the 9750H? Cant get the flex override to go below 26x on the MSI GS65 9SE model. BIOS unlocking worked as the other settings stuck after saving.

Sent from my SM-N975U using Tapatalk

 

Hi all! I've just received a GS75 8SF from GenTech, gone through all the motions (several times), and my i7-8750H has absolutely not spent a single moment in a package C-state beyond C3.

I've tried every combination of BIOS and TS configurations I can think of, reset everything several times, installed/upgraded/downgraded/uninstalled commonly mentioned drivers, etc.

I'm a little out of my element here, but a couple things stand out as potentially suspicious (or maybe totally normal):
- HWiNFO only shows package residency sensors for C2 and C3
- Intel BITS says I only have 3 entries (C1, C2, C3) in my _CST table

My related BIOS options currently include the following:
- SpeedShift enabled
- SpeedStep disabled
- C1E disabled
- Native ASPM disabled
- Package C-States Limit 10

Could anyone kindly help me go deeper?

 

Hi.

Speedstep needs to be enabled for C-state to work correctly.

 

This is probably that the current version of the BIOS on yours has the Flex ratio locked out.

Some member has tried flashing to an earlier version of the bios to overcome this.

 

Good to know, thanks. I read somewhere around here that SpeedStep (and C1E) are redundant when using SpeedShift, but I've gone and turned them back on and rebooted.

The problem still remains unfortunately

Some other bits of information:
- Native ASPM was already disabled out of the box
- SpeedStep and C1E were on, SpeedShift was off
- Package C-state limit was set to C7s
- I've since tried all the recommendations in http://forum.notebookreview.com/thr...e-on-windows-enabling-deeper-c-states.815602/ at least once

As I understand it, there could be about a million different things preventing deeper package residency, but I appreciate any advice even if it's things I've already tried.

I read that BITS has a C-state test script (completely cutting out the OS as a factor), but I could not find it in the latest version. I think my next step will be to find an old version that includes that test.

 

Did you try other version of the BIOS?

These are the releases from 2019/04/17 until now that the links are still available from MSI for GS75 8SF.

https://download.msi.com/bos_exe/nb/E17G1IMS.10C.zip
https://download.msi.com/bos_exe/nb/E17G1IMS.10D.zip
https://download.msi.com/bos_exe/nb/E17G1IMS.10F.zip