Folding Forum

My computer keeps overheating whenever F@H runs.

Is there an option to limit CPU usage by the program? (64bit Win7 Home.)

Mugsy_in_Houston wrote:My computer keeps overheating whenever F@H runs.

Is there an option to limit CPU usage by the program? (64bit Win7 Home.)

You can see this to limit CPU and GPU usage https://github.com/FoldingAtHome/fah-issues/issues/1324

Welcome to Folding@Home!

In the Advanced Control you can set the number of threads F@H is allowed to use. I do not know how many threads you have but if you do, you can make adjustments.

In the taskbar to the lower right of the screen, you should see a F@H molecule icon, click it (you may need to click an Up Arrow to see it ^)

The second item in this menu is Advanced Control, click it

On this screen to the left is a Configure button, click it

Now you get a screen with a Slots tab, click it

On this white field should be a cpu item, click it and then click edit

By default F@H set the number of CPUs to -1 meaning let the software decide.
You can enter any number from 1 to the number of threads you CPU supports.
If you have GPUs, F@H reserves one CPU per GPU to feed it data across the PCIE bus.

F@H has difficulty with large primes and their multiples number of CPUs.
7 is always large, 5 is sometimes large, and 3 is never large. Try to choose a number that is a multiple of 2 and/or 3.
2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 27, etc. are good numbers of CPUs to choose.
5. 10. 15, 20 etc may work most of the time. Other numbers will bite you.

Having said that, the new 7.51 client tries to automatically shift down to a safe number.

Enter the number you choose and click save.

Perfect. Just what I needed. Thx.