Memory Required for 12 core 24 Thread CPU


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Message boards : Number crunching : Memory Required for 12 core 24 Thread CPU

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Fullsus
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Message 6041 - Posted: 22 Jan 2017, 0:09:35 UTC

Hi all,

I upgraded my server recently so that do more processing for Boink project including Atlas@Home. I now have a 12 core (24 thread) Xeon.
I was wondering how much memory I would require to make full use of the 24 threads. At the moment I have 16 GB and I know that is enough Doh!

Was it 12GB per 8 core? So about 36GB

Thanks for looking


Steven

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Message 6042 - Posted: 22 Jan 2017, 3:31:45 UTC - in response to Message 6041.

If you run 8-core multicore WUs, you will need 2.5Gbytes + 0.8Gbytes per core in order to run that WU, i.e. 8.9Gbytes.
With 24 cores and BOINC Manager configured to use 100% of your CPU, you should be able to run 3 of those 8-core multicore WUs. But for this to work, you will need a minimum of 27GBytes RAM.

32Gbytes RAM would be sufficient.
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Fullsus
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Message 6043 - Posted: 22 Jan 2017, 5:01:33 UTC - in response to Message 6042.

OK cool, I will see what I can do,

Appreciate your quick reply

Steven
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Message 6047 - Posted: 22 Jan 2017, 20:04:46 UTC

I'll be putting 64Gb in my 24 thread machine.

The efficiency of the 8core WU's isn't great, I run quad ones max, this needs a bit more ram though 5.7GB X number of WU's

I can get by with 128Gb for my 56 thread machine and 96Gb for my 40 thread machine, as I don't run all Atlas.

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Message 6049 - Posted: 22 Jan 2017, 22:45:09 UTC - in response to Message 6047.

I was going to change to quads in the config file. I saw a couple of messages about the current issues people are having.

My priority is trying to buy 1 or 2 graphics cards for other projects and then hit the memory. but the motherboard I have only supports 64GB with four slots.

Intel has definitely done a lot for changing servers over the last 5 years, just a shame about the price. ;-)

steven
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Message boards : Number crunching : Memory Required for 12 core 24 Thread CPU