From: Otsile Mojanaga
Sent: Monday, May 13, 2024 3:29 PM
To: Paul Emsley <pems...@mrc-lmb.cam.ac.uk>
Subject: RE: [ccp4bb] Request for help in optimizing Coot for AMD 5950x CPU and 
RX6600XT GPU hardware PC

Dear Paul/All
Thank you for the response. I am on Windows 11 and I tried looking around Coot 
to see where I could input the commands you have suggested but I cannot find 
anything . I also cannot seem to type the commands into the 'Command prompt' 
that opens alongside Coot. I also tried inputting the commands in the 'Coot 
Python scripting' within Coot but this did not work. Please advise on when you 
can input these commands.

Kind regards,
Otsile

From: Paul Emsley <pems...@mrc-lmb.cam.ac.uk<mailto:pems...@mrc-lmb.cam.ac.uk>>
Sent: Monday, May 13, 2024 1:48 PM
To: Otsile Mojanaga <oo...@bath.ac.uk<mailto:oo...@bath.ac.uk>>; 
CCP4BB@JISCMAIL.AC.UK<mailto:CCP4BB@JISCMAIL.AC.UK>
Subject: Re: [ccp4bb] Request for help in optimizing Coot for AMD 5950x CPU and 
RX6600XT GPU hardware PC

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On 13/05/2024 13:03, Otsile Mojanaga wrote:
Dear All
I have been using coot as part of my normal workflow but since last week I have 
been having issues with Coot after I built my own PC which contains the 
following Hardware:
CPU - AMD Ryzen 9 5950X 16-Core Processor - 16 Cores, 32 Threads
RAM - 64 GB
GPU - AMD Radeon RX 6600 XT - Primary/Discrete
GPU VRAM - 8176 MB - GDDR6 2000 MHz

Despite the improvement in hardware, Coot is now having issues refining 
molecules when using the 'real space refine' tool and other related tools. When 
trying to refine, the program becomes stuttering and slow such that it becomes 
unfeasible to use the program in a reasonable amount of time. My current work 
around is to run Coot through CCP4 cloud but this greatly slows down my 
workflow. >From what I can see Coot is not be optimised for the AMD CPU.


You don't mention the operating system.

Maybe you have too many threads for Coot? Try setting the COOT_N_THREADS to 
various values (starting, say, with 2) and see what happens.

But maybe it's a graphics (driver) issue and not a CPU/threads issue. glxgears 
is the classic test for that.

Paul.



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