25 Jun
2023
25 Jun
'23
12:55 a.m.
On 6/24/23 12:00, David Kastrup wrote:
Colin Fletcher<colin.m.fletcher(a)googlemail.com>
writes:
Not necessarily pertinent to the issue, but a few years ago I decided to
invest my budget for a new "power" machine into a Dell XPS 15 laptop
(i9, 64GB RAM, 2TB NVMI SSD, 16" 4K OLED display). Nominally the CPU can
do 5GHz, but I've never had it top 4.6GHz. And hitting that required
sitting the laptop on a large five-fan laptop cooler.
So, after too many words, my next "power" machine *won't* be a laptop.
So many new laptops are so "optimized" to be slim and thin, they have
little or no real cooling capacity. I think even some of those small
cases do better cooling than laptops these days.
--
David W. Jones
gnome(a)hawaii.rr.com
authenticity, honesty, community
http://dancingtreefrog.com
"My password is the last 8 digits of π."
Could be "turbo" mode? The CPU is
clocked at a speed that'll cause it
to run too hot if fully loaded, and throttled back when the
temperature rises. You can see the current state, and turn it off &
on, via:
/sys/devices/system/cpu/intel_pstate/no_turbo
Write '0' there to enable turbo mode, '1' to disable it. Disabling it
makes my laptop run a lot cooler.
Attached the tiny shell script I use to see & change the setting, in
case that's useful.
When the module thinkpad_acpi (I suspect dependent on
laptop type) is
loaded with the option fan_control=1 you can do things like
echo level 7|sudo tee /proc/acpi/ibm/fan
or
echo level disengaged|sudo tee /proc/acpi/ibm/fan
(the last one is the loudest and fastest) in order to set a particular
fan speed.
echo level auto|sudo tee /proc/acpi/ibm/fan
resets to temperature-based.
My laptop has a thermal design power of 35W and my CPU of 45W, so if I
am doing heavy computations, I tend to crank the fan up in advance
because it will underestimate where it has to go for a given
temperature.