Help with overheating i7-4800MQ / 760M

[shruggygoat]

Hello,

HP Envy 17T CTO - i7-4800MQ, 16GB RAM, GF 760M.

Have an old HP Envy laptop which is overheating and shutting down due to thermal events.

I have to use the Windows power profile to lower the maximum CPU state to about 70% to reduce the risk of this happening, although it still happens.

I have a video here of throttle stop and HWinfo showing the temperatures peaking and triggering throttles.

Not sure how to resolve this, but I'm going to disassemble and reapply thermal paste to CPU / GPU later.

 

[P4-630]

Have an old HP Envy laptop which is overheating and shutting down due to thermal events.

Did you try cleaning out the dust bunnies first?

 

[shruggygoat]

Just took it apart and the dust bunnies were only partially blocking about 20% of the exhaust fin, still not opimal but cleaned now. Cleaned old paste and reapplied new TM30 paste to CPU/GPU and SB.

Will see how it works now..

Temperature is way down for the last 20 mins, but still getting EDP yellow warning...any ideas?

 

[unclewebb]

Post a screenshot of the TPL window.

 

[shruggygoat]

BTW I just installed Throttlestop when I was trying to figure out the issue, so nothing in there has been changed.

One thing for sure is that the fan is no longer going 100% at the Windows desktop idle and temps are in the 40-60 range so I'm happy with that, but just wondering if I should be concerned with the EDP stuff.

Eh, spoke too soon. When I have the power plan setting at 100% limit, I'm getting red flashes in the limit monitor and CPU temp is up to 84C again with a game or 1080p YT video open..wtf

 

[unclewebb]

For EDP throttling, try setting the PP0 Current Limit to 0 or to the max, 1023. Either setting should tell the CPU to ignore this limit.

When idle at the desktop with only ThrottleStop open, what does ThrottleStop report for C0% on the main screen? I have a similar 4700MQ and C0% is under 0.5% when idle. If you have a bunch of stuff running in the background, your CPU will run hot. Open the Task Manger, go to the Details tab and see what is running on your computer if you have high idle C0%.

Where is a picture of the FIVR window? Undervolting can help reduce the CPU temperature. Some laptops have locked out this feature.

I am not sure if TM30 paste is good or bad. Some pastes do not work very well when applied direct die to mobile CPUs. Some pastes can fail in less than a week. If the load is the same and your temperatures have suddenly changed, the thermal paste might have started to pump out. Here is an example of pump out.

 

[shruggygoat]

I disabled Turboboost and things have settled down quite a bit.

Here is a screenshot of the FIVR window.

C0% fluctuates between 5-12% every couple of seconds.

image

I renabled turboboost, and I'm getting EDP red current limit with just a browser open.

I changed the PP0 current limit to 0 and no effect. Don't know if I did it right.

BTW thank you for your help so far.

 

[unclewebb]

Did you try setting the PP0 Current Limit to the max, 1023?

In the FIVR window you can try undervolting the CPU. This will reduce power consumption and heat. Check the Unlock Adjustable Voltage box and set the core and the cache to -50 mV each. That is a good place to start testing.

C0% fluctuates between 5-12% every couple of seconds.

Check the Task Manager Details tab. You have too much crap running in the background. That is creating the extra heat. Here is an example of my desktop computer. The C0% for each core and thread is very low. That is with Google Chrome open but minimized.

My 4700MQ has the cores spending more than 99% of the time in the low power C7 state.
Your computer is miles away from that. Active cores when idle create heat.

 

[shruggygoat]

Renenabled turbo boost, set PP0 current limit to 1023 and now I'm seeing a constant PL2 in the limiter. Fan immediately spun up to medium speed with a game open. CPU temps back up to 88-90C with game open.

Seems like Turboboost is causing the issues here, otherwise games are in the ~70C range with it off. Is there a way to lower the TB maximum? Like still have it enabled but cap it at a multiplier or something? Also ambient temp in the room is 68F.

Renenabling TB and setting the maximum multiplier to 30 seems to be the sweet spot. I didn't mess with voltage since I can't adjust the slider to less than the minimum?

 

[unclewebb]

You have to move the Offset Voltage slider to the left to select a negative offset voltage. There is lots of room to move that one. Leave the Voltage slider above that one set to Default.

Intel CPUs are designed to run reliably at 70°C, 80°C or 90°C. You can slow your CPU down if you want to but there is no need to worry that you are going to damage your CPU. All of these temperatures are considered to be normal operating temperatures. Intel sets the default thermal throttling temperature to 100°C because they are comfortable with their CPUs running at high temperatures.

Glad to see that setting the PP0 Current Limit sky high fixed your EDP throttling problem.

Some power limit throttling is completely normal for these CPUs. PL1 is locked to 47W and PL2 is locked to 58W. That is not enough power to run a 4800MQ at full load and full speed. These boxes occasionally going yellow in Limit Reasons is normal. When you reduce the voltage, you should see less power limit throttling.

 

[shruggygoat]

Unfortunately with TB set at the default (36) EDP throttling still happens with PP0 set to 1023.

I just set cpu/cache to -50mv and will see how that works out.

For now, limiting TB to 30 has fixed the crazy high temps and fan going nuts. Getting 3.0ghz in TB is fine enough for me.

 

[unclewebb]

EDP throttling still happens

Some EDP throttling is hard to fix. It is not well documented in Intel's publicly available documentation. The only other thing you can try is to check the MMIO Lock box in the TPL window. This box should also be checked if you ever decide to Overclock your CPU. The Turbo column in the FIVR window shows what maximum multipliers your CPU supports when overclocking.

Getting 3.0ghz in TB is fine enough for me.

Some games or some tasks do not require full CPU speed. That is a useful feature of ThrottleStop. You can run your CPU at whatever speed you like.