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I tried disabling the start up programs and it did not help. It comes with bitdefender, an ebay app, amazon app, abMedia, Acer Recovery management, and Spotify. I have tried changing the power options, making sure running on battery and while plugged in are exactly the same on high performance, I have tried removing event logs, I have tried removing all USB peripherals. Intel HD Graphics 5500 with up to 3839 MB Dynamic Video Memory Intel Core i7-5500U 2.4ghz with Turbo Boost up to 3.0 GHz Again all this happens only when the laptop is plugged in to charge. When I plug in USB devices the clock speed goes down. It is definitely not an overheating issue. The clock speed drops only when a demanding program is open, and the program uses the same amount of cpu no matter the clock speed. Whenever it is plugged in however, the clock speed of the processor drops down below 1 ghz as low as 0.60 ghz and performance is severely reduced.

Whenever the laptop is unplugged, the performance on games and other programs is stunning. Much like in overclocking and undervolting, run tests to make sure your system is stable with your settings.A few days ago I acquired a Brand New Acer Aspire E 15 E5-571-74AP laptop, and found a frustrating problem. This way, you let no other factor keep you from maximum speed besides the temperature of the CPU itself. Now, when you do a stress test, the only Performance Limit Reason (check in HWiNFO) should be thermal throttling. Set Turbo Boost Long Power Max to a very high number. Turn off Turbo Boost Short Power Max, which makes PL2 unlimited. Turbo Time Limit is the number of seconds your CPU is allowed to operate at PL2 before dropping down to PL1. “Turbo Boost Long Power Max” is known as PL1 and “Turbo Boost Short Power Max” is known as PL2. I tried overloading, I tried different monitors and intel cpu diagnostic programs.

Greetings, as of today, my Turbo boost technology stopped working again.