Severe slowdown after leaving alone for 10 mins: HELP Please!

[kirkfletcher]

Ok, so this may be a little tricky to explain but here goes:-

My specs: H170m-D3H, i5 6600, 16gb, 850 EVO, GTX 970, Sierra 10.12.5, SysDef 17,1
System runs beautifully, clean, smooth and has NEVER crashed! it's a joy to use, however.....

If I walk away from my computer and leave for around 10 mins or so and come back, the system runs soooooo slow is actually unusable, swiping between screens or clicking menu item can chug horrendously after about 1 - 3 mins of wiggling the mouse it snaps back into action and is once again perfectly stable and FAST!

I have 'Turn display off..' set to 'never' I also have 'Prevent computer from sleeping.....' ticked.
Screen saver is set to 20 mins (this happens way before screen saver kicks in at around 10 mins of idle).

I am stumped, the system runs extremely well other than that. If i go to the toilet and come back I have to face 1-3 mins on unresponsiveness. Ideas?

(Clover Configurator images to show kexts and ACPI settings FYI)

 

[BreBo]

If I walk away from my computer and leave for around 10 mins or so and come back, the system runs soooooo slow is actually unusable, swiping between screens or clicking menu item can chug horrendously after about 1 - 3 mins of wiggling the mouse it snaps back into action and is once again perfectly stable and FAST!

See Idling for 10 minutes causes Sierra to lag/freeze for a couple of minutes

 

[kirkfletcher]

See Idling for 10 minutes causes Sierra to lag/freeze for a couple of minutes

Cheers, Probably should have searched first!