LinuxCNC and AMD APU?

  • BeagleBrainz
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6 years 6 months ago #162846 by BeagleBrainz
Replied by BeagleBrainz on topic LinuxCNC and AMD APU?
I have all my bits, so to speak, in a 19" rack cabinet.

Just make sure you have the filtration to match the ventilation, otherwise it maybe moot having all the ventilation.

My MB is in a 1U chassis, Mesa 7i92 & 7i76 with 5v PSU & one 12v psu are in a 2U chassis and the Stepper drivers & 48v are in a 3U chassis, without a lid on the 3U only, I can run the Mill all day in the Aussie summer in poxy hole that the Estate agent refers to as a 1 car garage (tho if you manage to get a car in there getting out of the car is an issue) and haven't seen a issue with heat. Apart from the back of the cabinet and a vented panel in the front it's all enclosed. Of course I don’t' have a VFD in there, but the VFD for the Lathe doesn't create an over abundance when pushing the 1HP motor.
But I do know some people really like their fans.

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6 years 6 months ago #162856 by blackmennewstyle

BeagleBrainz wrote: I have all my bits, so to speak, in a 19" rack cabinet.

Just make sure you have the filtration to match the ventilation, otherwise it maybe moot having all the ventilation.

My MB is in a 1U chassis, Mesa 7i92 & 7i76 with 5v PSU & one 12v psu are in a 2U chassis and the Stepper drivers & 48v are in a 3U chassis, without a lid on the 3U only, I can run the Mill all day in the Aussie summer in poxy hole that the Estate agent refers to as a 1 car garage (tho if you manage to get a car in there getting out of the car is an issue) and haven't seen a issue with heat. Apart from the back of the cabinet and a vented panel in the front it's all enclosed. Of course I don’t' have a VFD in there, but the VFD for the Lathe doesn't create an over abundance when pushing the 1HP motor.
But I do know some people really like their fans.


Your setup looks amazing. I will make sure to do not under-look the filtration. Thank you for all your inputs :)

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6 years 6 months ago #162880 by tommylight
Replied by tommylight on topic LinuxCNC and AMD APU?
Not much luck with it, it has a latency of over 400000!
The main issue is there is no way of disabling hyperthreading, the thing that i utterly hate, it never did anything to improve computing, but it is still being used as a holy grail !
Will have to do some more tests but it does not look good, to much power saving and throttling core jumping, DDR4 with to much latency, etc etc.

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6 years 6 months ago #162883 by blackmennewstyle

tommylight wrote: Not much luck with it, it has a latency of over 400000!
The main issue is there is no way of disabling hyperthreading, the thing that i utterly hate, it never did anything to improve computing, but it is still being used as a holy grail !
Will have to do some more tests but it does not look good, to much power saving and throttling core jumping, DDR4 with to much latency, etc etc.


Oh snap. What motherboard are you using? Maybe i can help you out for disabling hyperthreading. For Intel, it's often called disable SMT while for AMD it's called disable CMT. But sometimes, the motherboard manufacturers mix up both naming. Try to search for both naming in your motherboard BIOS.
The following user(s) said Thank You: tommylight

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6 years 6 months ago #162895 by tommylight
Replied by tommylight on topic LinuxCNC and AMD APU?
Nice, i will give it a try as soon as i get in the house, i am outside in the sun as we had snow twice in the last two two weeks with temperatures below 0 celcius.

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6 years 6 months ago - 6 years 6 months ago #162901 by BeagleBrainz
Replied by BeagleBrainz on topic LinuxCNC and AMD APU?

tommylight wrote: Not much luck with it, it has a latency of over 400000!
The main issue is there is no way of disabling hyperthreading, the thing that i utterly hate, it never did anything to improve computing, but it is still being used as a holy grail !
Will have to do some more tests but it does not look good, to much power saving and throttling core jumping, DDR4 with to much latency, etc etc.


You sure that was bare metal with a real time kernel and not in a VM with a vanilla kernel ?

Geesh that is bad. My little dual core atom I tested wasn’t that bad. Love to do more testing on it, but it’s now doing duties as a firewall\router. No point in wasting the dual NICs

Should try a summer down under tommy, that’ll warm ya bones.
Last edit: 6 years 6 months ago by BeagleBrainz. Reason: Invitation to spend summer 6’ from the sun

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