Mac mini 2018 - Thermal management / Cooling solutions
 
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waterchill
(@waterchill)
Active Member
Joined: 3 years ago
 

The screenshots are after. Before I had max 3,0 - 3,1ghz

MacPro 6,1 12C/64GB/1TB 2xD500
MacMini 2018/i7/1TB/32GB eGPU Vega64/Sonnet650


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hornedfrog
(@hornedfrog)
Trusted Member
Joined: 3 years ago
 
Posted by: waterchill

Today I sticked with Liquid metal "Conductonaut". Now it goes very well. 

3
core1
core2
highest
lowest

We have about 0°C outside here, so it put the mini outside and went over VNC to control it. I pushed the fans to the max with "Macs Fan Control". So it will not go over 3,5ghz even if the temps are 10-15°C lower. 3,6ghz has been seen for 2-3 seconds but thats it. But look at the pictures.

Quite an improvement.  It looks like that's the best stuff.  It also looks like there is nothing nearby the CPU die that, might, get damaged by conductance. Does the liquid metal run easily? Is the heat sink base solid copper?

Mac mini 2018/i7/1TB/32GB RAM
Sonnet Breakaway Box 650W. Sapphire Vega 64 - (21275-03-20G card)
OWC Thunderbolt 3 14 port hub
AKiTiO Node Duo, 1 x Patriot Scorch M.2 512G SSD PCI-E 3.0 x 2 drive.


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waterchill
(@waterchill)
Active Member
Joined: 3 years ago
 

The heat sink is not solid copper but the inner core is copper. Appliance of this liquid is easy. Like normal paste.

MacPro 6,1 12C/64GB/1TB 2xD500
MacMini 2018/i7/1TB/32GB eGPU Vega64/Sonnet650


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hornedfrog
(@hornedfrog)
Trusted Member
Joined: 3 years ago
 
Posted by: waterchill

The heat sink is not solid copper but the inner core is copper. Appliance of this liquid is easy. Like normal paste.

Thank you.  Does the liquid flow or run out easily after installation?

Mac mini 2018/i7/1TB/32GB RAM
Sonnet Breakaway Box 650W. Sapphire Vega 64 - (21275-03-20G card)
OWC Thunderbolt 3 14 port hub
AKiTiO Node Duo, 1 x Patriot Scorch M.2 512G SSD PCI-E 3.0 x 2 drive.


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waterchill
(@waterchill)
Active Member
Joined: 3 years ago
 

The paste is half solid half fluid. There are q tips included to apply this fluid on the surface.

MacPro 6,1 12C/64GB/1TB 2xD500
MacMini 2018/i7/1TB/32GB eGPU Vega64/Sonnet650


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hornedfrog
(@hornedfrog)
Trusted Member
Joined: 3 years ago
 

@waterchill.  Thank you for the updates. Are the benchmarks faster?

Mac mini 2018/i7/1TB/32GB RAM
Sonnet Breakaway Box 650W. Sapphire Vega 64 - (21275-03-20G card)
OWC Thunderbolt 3 14 port hub
AKiTiO Node Duo, 1 x Patriot Scorch M.2 512G SSD PCI-E 3.0 x 2 drive.


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Sebastian Krampe
(@megaseppl)
Eminent Member
Joined: 3 years ago
 

Hi,

if anybody is interested in a WiFi based PWM fan controller for a cooling solution like my Glory Blow Hole: I have written a little terminal application for MacOS in ObjC and Swift that can run in background and submit the CPU temperature to the WiFi PWM controller.  The controller itself adjusts the speed of the 5V Noctua PWM fan runs on a cheap ESP8266 for which I have written a little firmware in C.
In my case the communication goes through my Home automation software (Mac mini -> Home automation -> PWM controller on ESP), but the program and the firmware can be easily rewritten to work without the software in the middle (Mac mini -> PWM controller). 

Above: My Home automation software with Kenobi (my Mac mini) and the Glory Blow Hole. The Temperature of the CPU sets the speed of the fan.

You would need Arduino IDE for programming the ESP, XCode for compiling the Mac program, the Noctua fan, an ESP8266 (with NodeMCU if you want a little less work), some cables (some 1 wire cables, 1 old USB cable and Micro USB)m WiFi and a little soldering skill. 
Because it would need a little time for me to change the software to make it work without my home automation just comment here if you're interested. Then I would create an independent version of both.

Mac mini 2018 i7, Razer Core X with PowerColor Red Devil 5700 XT


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bluetech
(@bluetech)
Eminent Member
Joined: 3 years ago
 
Posted by: waterchill

How much do the ram in "power" on full load?

Only 1,24w at load and 0,94w idleing.

That is 8k at 12workers after starting,
4 hours full load and the cpu boost pushes to 3,2Ghz.

3.6GHz at the Mini: ❤️ at8k Prime

that is 400Mhz more turbo than with stock thermal paste 😍
and a bit more watts for free 😇

Time for benchmarking the tweaked mini:
geekbench 4   &   cinebench 15   please

Under 10 Degrees is out of the Specs 😂

but: i like this crazy fun ....that is my first mac
and i don't want to lose the Warrenty 😇 

HexaMacMini/32Gb/512gb/10Gbit/s
...is waiting for eGPU-Power@Mojave


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hornedfrog
(@hornedfrog)
Trusted Member
Joined: 3 years ago
 
Posted by: Sebastian

Hi,

if anybody is interested in a WiFi based PWM fan controller for a cooling solution like my Glory Blow Hole: I have written a little terminal application for MacOS in ObjC and Swift that can run in background and submit the CPU temperature to the WiFi PWM controller.  The controller itself adjusts the speed of the 5V Noctua PWM fan runs on a cheap ESP8266 for which I have written a little firmware in C.
In my case the communication goes through my Home automation software (Mac mini -> Home automation -> PWM controller on ESP), but the program and the firmware can be easily rewritten to work without the software in the middle (Mac mini -> PWM controller). 

Above: My Home automation software with Kenobi (my Mac mini) and the Glory Blow Hole. The Temperature of the CPU sets the speed of the fan.

You would need Arduino IDE for programming the ESP, XCode for compiling the Mac program, the Noctua fan, an ESP8266 (with NodeMCU if you want a little less work), some cables (some 1 wire cables, 1 old USB cable and Micro USB)m WiFi and a little soldering skill. 
Because it would need a little time for me to change the software to make it work without my home automation just comment here if you're interested. Then I would create an independent version of both.

Thank you. Yes!

Mac mini 2018/i7/1TB/32GB RAM
Sonnet Breakaway Box 650W. Sapphire Vega 64 - (21275-03-20G card)
OWC Thunderbolt 3 14 port hub
AKiTiO Node Duo, 1 x Patriot Scorch M.2 512G SSD PCI-E 3.0 x 2 drive.


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bluetech
(@bluetech)
Eminent Member
Joined: 3 years ago
 
Posted by: waterchill

Today I sticked with Liquid metal "Conductonaut". Now it goes very well.

We have about 0°C outside here, so it put the mini outside and went over VNC to control it. I pushed the fans to the max with "Macs Fan Control". So it will not go over 3,5ghz even if the temps are 10-15°C lower. 3,6ghz has been seen for 2-3 seconds but thats it. But look at the pictures.

Liquid metal: I never test this, i ever use "budget-thermal-paste"
Artic Cooling MX-2, only 15€ for 30Gramms incl. shipping. (not 8€/ 1 gr.)
But in 2 or 3 Years....i think i have to test this liquid metal at the mini.

Just for fun: 
I think we have to wait for colder temperatures here in Germany.
I got my mini at the 8.November, because of knowing how cpus
in small cases can throttle, and to check this at the mini:

I put him in the fridge, at allowed 10 degrees Celsius. 
I don't get more cpu-performance with my stock setup,
and the up to 5% throttleing for me are okay.

But i thougt:
What about a freezer with -18 degrees?  
Not for Prime95 at 8k, only to look what scores are possible
at  geekbench 4   and  Cinebench  R15  😇 ?
Is Apple logging to low temperatures like this?
F........ Warrenty 😂 😜

In two or three years i do this! 
->To cose Apple Care is still possible for me.

Fan-Tool: I use the same like you,
my settings are: 

HexaMacMini/32Gb/512gb/10Gbit/s
...is waiting for eGPU-Power@Mojave


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