Hi there,
I just bought a Supermicro X11SDV-4C-TP8F, and I really like it. The active cooler I bought from Supermicro is extremely noisy, though, and I wanted to have it a bit quieter.
I read lots of blog posts about setting up the upper and lower threshold of the fan speed via impitools, as well as sending raw commands to lower the duty cycle, thus reducing the fan speed. However, this only works if the fan is set to full speed, as it seems that other modes, such as optimal, override my adjusted duty cycle, and I don't know why.
My problem is that I would like to achieve a quieter fan speed, but of course if the CPU gets very hot, I want the fan to spin faster, but to reduce its speed if the cpu get cooler. I do manage to control the fan speed, but if I choose one of the automatic modes (such as optimal), my settings get overwritten, and if I choose full speed, it won't change its speed based on external events.
I am pretty much confused about setting the lower and upper thresholds. Does it affect the fan speed at all, or is it just an alarm? I set my upper threshold to a quieter value, but my fan wouldn't spin slower after that. But I understand that if I set a too high lower threshold, it might spin faster to recover. So this makes me very confusing - is there a way to use these thresholds to achieve getting a quieter fan?
How is the interplay between duty cycle setting via raw mode, thresholds, the standard and optimal modes? My main goal would be, like, if the CPU is over 50ºC, spin it at 3000 rpm. If it is below 50, spin it at 2500. If below 45, spin at 2200.
I might replace my fan to a quieter one, but before that, I am running at full speed and reduced the duty cycle to 0x2, which gives me 2200 rpm and keeps the cpu around 43º C. Not bad, but it could be cooler. And of course, if something crashes and starts to warm the CPU, I'd like the fan to spin faster and get back to 2200 rpm after cooling.
Could anyone help me to make sense of this all?
Thanks,
Francis
I just bought a Supermicro X11SDV-4C-TP8F, and I really like it. The active cooler I bought from Supermicro is extremely noisy, though, and I wanted to have it a bit quieter.
I read lots of blog posts about setting up the upper and lower threshold of the fan speed via impitools, as well as sending raw commands to lower the duty cycle, thus reducing the fan speed. However, this only works if the fan is set to full speed, as it seems that other modes, such as optimal, override my adjusted duty cycle, and I don't know why.
My problem is that I would like to achieve a quieter fan speed, but of course if the CPU gets very hot, I want the fan to spin faster, but to reduce its speed if the cpu get cooler. I do manage to control the fan speed, but if I choose one of the automatic modes (such as optimal), my settings get overwritten, and if I choose full speed, it won't change its speed based on external events.
I am pretty much confused about setting the lower and upper thresholds. Does it affect the fan speed at all, or is it just an alarm? I set my upper threshold to a quieter value, but my fan wouldn't spin slower after that. But I understand that if I set a too high lower threshold, it might spin faster to recover. So this makes me very confusing - is there a way to use these thresholds to achieve getting a quieter fan?
How is the interplay between duty cycle setting via raw mode, thresholds, the standard and optimal modes? My main goal would be, like, if the CPU is over 50ºC, spin it at 3000 rpm. If it is below 50, spin it at 2500. If below 45, spin at 2200.
I might replace my fan to a quieter one, but before that, I am running at full speed and reduced the duty cycle to 0x2, which gives me 2200 rpm and keeps the cpu around 43º C. Not bad, but it could be cooler. And of course, if something crashes and starts to warm the CPU, I'd like the fan to spin faster and get back to 2200 rpm after cooling.
Could anyone help me to make sense of this all?
Thanks,
Francis
