[Beowulf] List archives

[Jonathan Aquilina]

Hi Doug,

Not to derail the discussion, but a quick question you say desk side cluster is it a single machine that will run a vm cluster?

Regards,
Jonathan

-----Original Message-----
From: Beowulf <beowulf-bounces at beowulf.org> On Behalf Of Douglas Eadline
Sent: 23 August 2021 23:12
To: John Hearns <hearnsj at gmail.com>
Cc: Beowulf Mailing List <beowulf at beowulf.org>
Subject: Re: [Beowulf] List archives

John,

I think that was on twitter.

In any case, I'm working with these processors right now.

On the new Ryzens, the power usage is actually quite tunable.
There are three settings.

1) Package Power Tracking: The PPT threshold is the allowed socket power consumption permitted across the voltage rails supplying the socket.

2) Thermal Design Current: The maximum current (TDC) (amps) that can be delivered by a specific motherboard's voltage regulator configuration in thermally-constrained scenarios.

3) Electrical Design Current: The maximum current (EDC) (amps) that can be delivered by a specific motherboard's voltage regulator configuration in a peak ("spike") condition for a short period of time.

My goal is to tweak the 105W TDP R7-5800X so it draws power like the 65W-TDP R5-5600X

This is desk-side cluster low power stuff.
I am using extension cable-plug for Limulus blades that have an in-line current meter (normally used for solar panels).
Now I can load them up and watch exactly how much current is being pulled across the 12V rails.

If you need more info, let me know

--
Doug

> The Beowulf list archives seem to end in July 2021.
> I was looking for Doug Eadline's post on limiting AMD power and the 
> results on performance.
>
> John H
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--
Doug

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