Folding Forum

Hi all,

So I've read here that up to 32 threads per WU is supported.

However I have a bit of an issue.

I have a system with 2 sockets. Each socket has a 22 core CPU. Now if I create two slots, each with 32 threads, they both start on CPU 1 and nothing is running on CPU 0. Any idea what is going on with that ?

If I manually change the CPU affinity in task manager, i can separate them by pause/restart but when a new WU starts it goes back to CPU 1.

Windows 8.1, current FAH Client. Intel CPU and chipset. No GPU.

Are there any advanced instructions for using FAHClient on multisocket systems ?

Please post your log including the top 200 or so lines which has the system config info in it) and we can try to help … for guidance on this see viewtopic.php?f=61&t=26036

Usually configuring multisocket systems is relatively simple and shouldn't cause you too much pain - as soon as we know your configuration we should get this sorted quickly.

Please note that standard Windows 8.1 will not support more than 1 physical CPU (https://superuser.com/questions/495105/ ... -8-support). Also, in Windows, behavior is very different with high CPU count (https://www.anandtech.com/show/15483/am ... x-review/3).

Is there a reason you need to you Windows? I would recommend that you switch to Ubuntu/Mint and you can setup CPU folding very easily since you're not folding on GPUs. Here's the breakdown:
2 CPUs with 22 Physical Cores each results in 88 threads with hyperthreading. For F@H, it would be:
CPU Slot 1: 32 CPUs
CPU Slot 2: 32 CPUs
CPU Slot 3: 24 CPUs

If heat becomes an issue, disable hyperthreading so you get a total of 44 CPUs which would result in :
CPU Slot 1: 32 CPUs
CPU Slot 2: 12 CPUs

Which version of 8.1 .. pro or ent will do two cpu systems .. home unfortunately doesn't

I would look into upgrading to Windows 10 Pro, as far as I'm aware although additional research may/will be required it supports 2 sockets and depends on where you look Windows 10 Pro key can be bought cheap from Amazon.

Tulane, you solved it ?

Windows Pro does support it; or Linux.
I'm not sure if Windows 10 supports dual die CPUs, but if it does, it will probably be limited to an x-amount of cores (like 32 or so).
Linux is your best bet. It supports up to 4096 CPU cores.

MeeLee wrote:...I'm not sure if Windows 10 supports dual die CPUs, but if it does, it will probably be limited to an x-amount of cores (like 32 or so)...

Windows 10 Pro 64- bit has 2 physical CPU support up-to 256 threads: https://answers.microsoft.com/en-us/win ... 23f?auth=1
Windows Server 2019 supports more than 255 threads: https://support.microsoft.com/en-nz/hel ... -rome-proc

I would say that Linux is the easiest with multi-CPU system while Windows can work if you have the right stuff.