Hi Guys,
Ran into quite a strange problem, so thought I'd give this forum a try. Tried discussing it on the Windows community forums but they were having none of it.
I've noticed that the machine felt sluggish over the past month or so, but never gave it much though. Today, for some reason I opened up the Task Manager, and noticed that no matter how much load the CPU is getting, the speed does not go over 2.28GHz (Standard clock speed is 2.3GHz). Now, at first I thought it could be the power settings, since I have managed to throttle the processor speed previously by reducing it to 95%. After some playing around, I ruled out the power settings, since the system does respond to them if you cut the maximum power state, the processor speed cuts down too. When set at 100%, it does not go over 2.28GHz. This means, since its a TurboBoost pocessor, that because it doesn't reach its full capacity, it does not go into TurboBoost.
I have updated the drivers, and the BIOS from the manufacturers website. The only way to resolve this issue, is by ticking the "PCI Lock" box in advanced boot options in msconfig. When the box is ticked, the computer restarts and the processor works correctly, boosting up to 3.3GHz. The only issue with that is, once the box is ticked, issues arise with other devices, for example, the network card is not recognised at all. Un-tick the box, restart, and the network card functions as it should, but the processor is throttled.
I dont know if this could be affecting the issue in any way, but the secondary HDD fails to spin down according to the power settings. It is supposed to stop after 1 minute, but despite having no activity (in resource monitor, or audible reads/writes) it keeps spinning. If you have no advice on the processor, maybe you've some idea on this instead? Its eating up power, and producing unnecessary heat and noise since the hard drive is only used for backups.
The specs are:
Dell M3800
Windows 10 Pro
CPU i7-4712HQ 2.3GHz (Up to 3.3GHz)
16GB RAM
512 Samsung SSD (With OS)
1TB Secondary
I am not sure when did the issue begin, since the performance has been sluggish for around a month and I cannot blame any new installations for this. The PCI lock seems the only way to temporarily solve the problem. All drivers are up to date, even tried downgrading and upgrading the BIOS. Only PCI lock seems to have any effect.
Any help would be greatly appreciated!