Core PL1 + GPU PL1 + Ring EDP OTHER

[CreaGab]

Hi,

i have a Dell Precision 7530 and I did some downvolting -160mV CPU Core and Cache, it runs stable (for now) but I keep getting those red limits shown as per thread title.

My GPU is iGPU and a Quadro P2000 Mobile.

Why is it limiting also on GPU if I only do Cinebench?

 

[unclewebb]

Post screenshots of the TPL and FIVR windows.

 

[CreaGab]

Post screenshots of the TPL and FIVR windows.

Sorry, here they are.

 

[unclewebb]

It looks like your laptop is using an embedded controller (EC) to set a 60W power limit. This is common for Dell laptops. ThrottleStop does not have access to the EC power limit. I do not know of anyone that has found a way to bypass the EC power limit.

You seem to have a large difference in peak core temperatures when the cores are equally loaded. This is usually a sign of a cooling or thermal paste problem. Fixing that will probably not make any difference to overall performance. You will still be limited to 60W long term.

 

[PHVM_BR]

The Precision 7000 has a locked power limit.
On my Precision 7540 (the same chassis and the same cooling system) it is 75/107W in Ultra Performance mode.

Is your system set to ultra performance mode (Dell Power Manager)?

I discovered that by changing the limits and checking the Lock MMIO box, the limits are unlocked after the system returns from sleep.
Another option is to modify the IMON slope variables in the BIOS.

This is the time to change the thermal paste as the temperature difference between the cores is horrible.

You will get a huge improvement in thermal headroom with a well-done repaste with quality compost.

I recommend PTM 7950 or KryoSheet (conductive, but just make sure the sheet stays in the right place to avoid any problems).

 

[CreaGab]

Sorry guys for my late reply, work made me tired last two days...

I completely disassembled the Precision 7530 and repasted it with Noctua thermal paste and also noticed that the CMOS battery was completely dead with only 0.75V because this Laptop was on a shelf at my company for the last 5 years without being used... it was like new when I bought it from them, zero charge cycles and still old 1803 windows 10

Anyway, after changing the thermal paste and battery I got to work figuring out how to permanently disable the EC chip and was successful!
Now the CPU only reports half of the electricity used to the EC.
From 80W to 40W now or 100W now only 50W!
I also noticed that the temps of the cores went up (of course) because now they can turbo as long as they want to.
HW Info did report a total system consumption of around 135 Watt!

I did notice that 2 cores are still hotter than the rest, but I don't really know why after making sure that I applied even pressure to the heatsink and give it enough thermal paste.

My Cinebench 2024 score is now 463 and Throttle stop TS Bench only takes 11.165 seconds with 120M.
I will attach some photos of throttle stop, maybe there is something that you guys can recommend to me.

 

[unclewebb]

how to permanently disable the EC chip

Did you set IMON Slope to 50 or did you use some other trick?

For EDP OTHER throttling across all three domains, try setting Power Limit 4 to a value of 0. I also recommend setting IccMax to the max, 255.75, for both the core and the cache.

Order some Honeywell PTM 7950. That might give better thermal results from core to core. You can also double check your heatsink with a straight edge from side to side and from corner to corner to make sure it is flat.

 

[CreaGab]

Did you set IMON Slope to 50 or did you use some other trick?

For EDP OTHER throttling across all three domains, try setting Power Limit 4 to a value of 0. I also recommend setting IccMax to the max, 255.75, for both the core and the cache.

Order some Honeywell PTM 7950. That might give better thermal results from core to core. You can also double check your heatsink with a straight edge from side to side and from corner to corner to make sure it is flat.

Yes, I did set the IMON slope to 50%.
It was tricky getting the right Variable and corresponding value, I booted a custom shell where I could change the values.

Now to the settings...
I changed what you said and now there is no 3 red EDP other anymore, just thermal, PL2 and ring EDP other.
TS Bench also improved from initial ~12.5s to only 11.1s. yay

The only thing now is that the system wasn't very stable at -155mV at Core and Cache so I turned it down to 145mV, maybe it's more stable

Finally, I also think that Honeywell's PTM7950 is a good idea and would probably work fine but I don't really want to re-disassemble the system to it's core because it's a hassle prying off the keyboard plastic without damaging it (so far no damage).

My main goal of this Laptop that I bought for 50€=54$ xD was just to see how far I could push this monster to it's limit
I think that with all settings applied I have probably reached the highest score on that machine without major modifications.

 

[PHVM_BR]

Did you reach 120W with Noctua?

I find it difficult to reach that level with this thermal paste.

I've already used Noctua NT-H2 on my Precision and it accelerated a little above 100W and after about 2 minutes it stabilized a little above 90W.

 

[CreaGab]

Did you reach 120W with Noctua?

I find it difficult to reach that level with this thermal paste.

I've already used Noctua NT-H2 on my Precision and it accelerated a little above 100W and after about 2 minutes it stabilized a little above 90W.

Not really.
The first 20 seconds are fine with about 105 Watts but then it drops to around 80-90 Watts.
Peak System power draw is 140 Watts than drops after couple seconds.
For some reason two cores are around 10°C hotter than others but I already repasted it twice.
The Honeywell PTM7950 would maybe fix the difference but I do not want to reopen the PC for the while.

 

[PHVM_BR]

Not really.
The first 20 seconds are fine with about 105 Watts but then it drops to around 80-90 Watts.
Peak System power draw is 140 Watts than drops after couple seconds.
For some reason two cores are around 10°C hotter than others but I already repasted it twice.
The Honeywell PTM7950 would maybe fix the difference but I do not want to reopen the PC for the while.

The performance I got with noctua NT-H2 was very good, fully capable of handling my previous CPU (i7-9750H) which with undervolt consumed only 60W in Cinebench.

The problem is with the current i9 with 8c/16t that consumes +100W with the stock ratios even with undervolt.

For this level on this laptop Noctua NT-H2 does not serve well, as well as not sustaining this consumption, at high temperatures the thermal paste will pump out in a short time.

 

[CreaGab]

The performance I got with noctua NT-H2 was very good, fully capable of handling my previous CPU (i7-9750H) which with undervolt consumed only 60W in Cinebench.

The problem is with the current i9 with 8c/16t that consumes +100W with the stock ratios even with undervolt.

For this level on this laptop Noctua NT-H2 does not serve well, as well as not sustaining this consumption, at high temperatures the thermal paste will pump out in a short time.

Did you replace your thermal paste to Honeywells one?

 

[PHVM_BR]

Did you replace your thermal paste to Honeywells one?

Yes, the results above are with PTM 7950.

A few weeks ago I switched to KryoSheet to try it out and it's even better.

With PTM 7950 the Precision 7540 can sustain ~100W indefinitely while with KryoSheet it sustains ~110W all day in ideal conditions (ambient temperature <22°C and using a simple laptop stand).

 

[unclewebb]

with KryoSheet it sustains ~110W all day

Good to know.

Thermal Grizzly KryoSheet

Thermal Grizzly KryoSheet Thermal Pads

KryoSheet premium graphene thermal pads for outstanding and constant thermal conductivity thanks to a molecular structure stacked in the Z-direction.

www.thermal-grizzly.com

 

[CreaGab]

Yes, the results above are with PTM 7950.

A few weeks ago I switched to KryoSheet to try it out and it's even better.

With PTM 7950 the Precision 7540 can sustain ~100W indefinitely while with KryoSheet it sustains ~110W all day in ideal conditions (ambient temperature <22°C and using a simple laptop stand).

I guess I will have to try this one... xD
Btw did you just add KyroSheet to the CPU?
What did put on GPU?

I'm curious, did you also change the IMON values to half the wattage of cpu?

 

[PHVM_BR]

I guess I will have to try this one... xD
Btw did you just add KyroSheet to the CPU?
What did put on GPU?

I'm curious, did you also change the IMON values to half the wattage of cpu?

I currently have KryoSheet on the CPU and PTM 7950 on the GPU and I intend to continue this way for a long time.

No KryoSheet required on the GPU.
Even Noctua NT-H2 is sufficient if well applied, but I put PTM 7950 for durability as KryoSheet apparently does not degrade.

My Precision currently has an RTX 4000 (Quadro T2000 originally) with the Precision 7550's 90W VBIOS and it has never reached 80°C with up to 85°C for the hot spot.

These maximum temperatures are reached in stress tests with long-term CPU + GPU cross-loads.
During real workloads or games, temperatures are considerably lower.

I can sustain all day 60W on the CPU and 90W on the GPU simultaneously.

Therefore, the original 180W charger is insufficient and the battery is drained at a rate of 1% every 2 minutes under these conditions.

I bought a 240W Alienware GaN charger and it solved the problem.

I didn't change the IMON slope.

I found that the system comes back from sleep with the power limits changed with MMIO Lock checked.

This may or may not last depending on the CPU temperature.
Forcing a benchmark for several minutes with the CPU close to 100°C will return the limits to default.

 

[CreaGab]

I currently have KryoSheet on the CPU and PTM 7950 on the GPU and I intend to continue this way for a long time.

No KryoSheet required on the GPU.
Even Noctua NT-H2 is sufficient if well applied, but I put PTM 7950 for durability as KryoSheet apparently does not degrade.

My Precision currently has an RTX 4000 (Quadro T2000 originally) with the Precision 7550's 90W VBIOS and it has never reached 80°C with up to 85°C for the hot spot.

These maximum temperatures are reached in stress tests with long-term CPU + GPU cross-loads.
During real workloads or games, temperatures are considerably lower.

I can sustain all day 60W on the CPU and 90W on the GPU simultaneously.

Therefore, the original 180W charger is insufficient and the battery is drained at a rate of 1% every 2 minutes under these conditions.

I bought a 240W Alienware GaN charger and it solved the problem.

I didn't change the IMON slope.

I found that the system comes back from sleep with the power limits changed with MMIO Lock checked.

This may or may not last depending on the CPU temperature.
Forcing a benchmark for several minutes with the CPU close to 100°C will return the limits to default.

Wow, those are impressive numbers!

I will wait couple of days before buying the Kryosheet on Amazon (Only place for me to buy from), because I will wait till a buy multiple things and not just the little Kryosheet

Also I think that I wont be overdoing my 180W adapter because my GPU is limited to 40W and I can't unlock it, well I tried at least.

And if you want I can show you how easy it is, to tinker the BIOS and changing the IMON slope value permanently

 

[PHVM_BR]

Wow, those are impressive numbers!

I will wait couple of days before buying the Kryosheet on Amazon (Only place for me to buy from), because I will wait till a buy multiple things and not just the little Kryosheet

Also I think that I wont be overdoing my 180W adapter because my GPU is limited to 40W and I can't unlock it, well I tried at least.

And if you want I can show you how easy it is, to tinker the BIOS and changing the IMON slope value permanently

With the original 180W charger it is possible to consume up to 60W on the CPU and 80W on the GPU (original TGP of the VBIOS of the RTX 3000/4000/5000 of the 7540) simultaneously without discharging the battery.

I haven't been interested in changing the IMON slope yet, but maybe one day.

I discovered that UMAF smokeless (search reddit.com) accesses the advanced settings of these Precision BIOS and there are several possibilities for easy adjustment.