HELP A/C plug reducing CPU speed

[tealwater]

I’ve had my HP 15 notebook for about 5 years and it’s been perfect until about a year ago.   I think it may have happened after a Windows update but I’m not positive.  All I know is it started running very slowly.   It’s taken me all this time and lots of research to figure out what is going on.  I even restored the entire system back to its original state which didn’t help.

Anyway,  I realized if I start it up with just the battery it’s perfect.  The CPU speed goes up and down depending on what I’m doing, it’s quick and responsive...just like it used to be.  As soon as I plug the AC cord in the CPU speed drops to 0.50 GHz and the CPU percentage will not go over 23%.

I checked the temperatures and they’re all below 40 degrees so it’s not overheating.  I changed the power management to 100% for both battery and plug.   I don’t know why all of a sudden the a/c cord is causing this problem because it doesn’t do that to my husbands HP computer but the cord is what’s causing my issue.

what should I do?

[Riddle_Decipher]

@tealwater Greetings from the HP Community!

Please follow the steps listed below to improve the FPS and the CPU Speed (as there are no settings that can be tweaked or changed for CPU specifically)

• Update the graphics card, Chipset driver and BIOS using the HP website: click here to find and install the same.
• Increase the amount of RAM - by increasing the shared memory under system properties > Advanced > Performance settings > Advanced > Change Virtual memory > use the recommended file size for paging.

Make sure the graphics card is not in power saving mode - If you are after maximum performance of you Intel HD Graphics, make sure you have turned off all of its power saving features. That is why in order to achieve maximum performance you have to make sure that your Windows power plan is not on Power Saver, you can use the Balanced or the High Performance power plan. You can also click the Intel HD Graphics driver tray icon (it should be near the clock in the taskbar), select Graphics Properties, then click the Power tab and select Maximum Performance.

• Please, note that although this tip will certainly improve your Intel HD Graphics' performance it will also increase the power it draws, as well as the heat it generates under heavy load (which is the case for games). Caution is advised, especially if you are on a laptop that experiences temperature problems.
• Set the 3D preference of Intel HD Graphics to "Performance" - This trick will help you improve the frame rate in games. To apply it click the Intel HD Graphics driver tray icon, select Graphics Properties, then click the 3D tab and move the slider to Performance. In this way, you sacrifice a bit of image quality for improved 3D performance, which should lead to a few more frames per second (FPS).

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