PC slowing down

[mikef]

Zad said:

I'm surprised the core and motherboard temperatures got as high as 100C though

95C max core temperature against a Tjunction Max of 103. I don't think I'll be doing any protein folding though, unless I can move to a cooler room. The most I see in normal use is in the 50sC

[mikef]

Here's the process explorer screenshot in slowed-down state, with Geekbench running (slowly) and coming up with a pathetic score of 1,882 instead of 21,400. Not sure if anything stands out?




Someone mentioned processes that may run at idle; that would tie in with what I'm seeing; time to zap all Norton's idle time background stuff...

Edited by mikef on Tuesday 15th September 00:29

[mikef]

Yes, good spotting. I'm running Geekbench again now after a reboot and the same Task Manager performance screen shows speed above 3 GHz. At idle, with utilisation 2%, the speed is around 1.2 GHz

[mikef]

Thanks TN, will do that now

[mikef]

Yes, there are two IIS processes that are using a bit of memory; there is regular build and publish of a dot net IIS solution throughout the day (manual), but that's never been an issue on the past; and I also do that on a laptop when travelling

[mikef]

anonymous said:

[redacted]

Done, it was set to the default ("balanced")

[mikef]

Dot Net 4.5 on IIS though and as its a dev box only smoke testing on mobile form factors

[mikef]

I will do now that I have Process Explorer to help diagnose

Waiting for the next slowdown

[mikef]

I thank you all for your expert input!

Fixing the CPU power limits at 100% didn't solve the CPU slowdown

Killing off all the processes I could on slowdown didn't fix it, once it had happened

I'm thinking the two separate IIS processes were due to having both debug and publish running a largish solution from VS2012 (I can't see that being an issue (?))

The two processes I couldn't kill were Malwarebytes and Norton. Currently running without Malwarebytes to prove it's not that. Norton next

Edited by mikef on Tuesday 15th September 21:30

[mikef]

Just to keep this ticking over, and to avoid being one of those who posts a question then disappears; still happening, still don't know whether a hardware or software issue; next step is to replace the CPU paste when I can find time to do that

[mikef]

Sadly not; no process over 12% of CPU, core temps in the 40s C, no significant disk activity or RAM usage; the only thing, as someone spotted earlier, is that the CPU speed sometimes (but not always) shows in Task Manager performance view at 0.40GHz, down from 3.57GHz which is set as the minimum speed

[mikef]

Going through things again, here's something I noticed. Two sets of memory bought from Overclockers. Same part number, same SKU. Both Avexir DDR4, 2400MHz

One set is showing in memtest as 16-16-16-38, the other set as 16-16-16-39

Worth pulling 4 modules out to see if that could be an issue?

[mikef]

Asus X99-S, BIOS Version 1004

I've just replaced the CPU paste:



Also done a hard reset on the CMOS, turned off all the tuning jumpers on the motherboard, and am now underclocking the memory to DDR4 default 2133MHz

Let's see if going back to basics sorts things out. I only have today to test before heading off overseas for work

must.avoid.windows.reinstall

[mikef]

Problem still there; after an hour idle time slows down, Task Manager shows CPU speed as 0.40GHz and Geekbench score has gone from 20,000 to 2,000

[mikef]

Yep, that's a good idea. It will have to wait a week though until I'm back from a trip. This thread will be resumed!

[mikef]

860W Corsair AX860i Digital, Full Modular, 80PLUS Platinum, 1x120mm Fan, ATX v2.31

4 months old; has onboard diagnostics that connect to a USB header, can track exactly what it's doing

[mikef]

Thanks all for your suggestions while I've been away, now back on the case

The BIOS is now updated to the latest version (no change in behaviours) and I've disabled both EIST and CPU C-States in BIOS so that speedstep shouldn't kick in

I've also pulled out hardware so it's back to bare bones (although I need to leave the graphics card in, for obvious reasons)

I'm logging CPU usage, CPU temps and power draw

One thing I can tie this down to is going to sleep; have task manager open showing CPU speed as 3.57 GHz. Screen goes black and I immediately wake it up by pressing a key and the CPU speed is now 0.40 GHz and haven't found a way to speed it up again

That's happening even if I send it to sleep from the Power menu...

[mikef]

Or just keep working on this box

[mikef]

Pachydermus said:

Is the CPU fan working when it comes out of sleep mode?

Yes, both CPU and CPU Aux (push and pull) fans are showing as working in SpeedFan, at normal operating speed

[mikef]

Easier said than done; I've put a Linux distro on a USB drive and UEFI secure boot won't let me start the system off that