2014 15 MacBook Pro Throttling when Plugged in
So, I have a familiar but different issue with my Macbook and I’m confused how to correct it. It appears when I run graphically intensive applications (Photoshop the last time) it will go into a state where it runs at only 800Mhz but the moment I remove the Magsafe it will immediately pop back up to 3.2Ghz. This continues to happen until I do a hard reset in which case it goes back to behaving like normal. The Temperature readings are all in the normal ranges (GPU/CPU/Chassis/Board) at least according to Macs Fan Control. The battery is kinda shot however, it might hold a charge for 25 to 30 minutes. However now its saying that it’ll take 10 hours to charge the battery but within a few minutes it goes to 100%. The other oddity is that I run YouTube at 4k and fall asleep to videos and it doesn’t do this, just if I run a program like Minecraft or Photoshop it appears. In activity monitor the Kernel Process goes up to 700/800% while its throttling. I’m not sure if that’s the cause of the issue or just the computer sh**ing its pants when its running at 800mhz.
I’ve tried resetting the SMC/PRAM with no luck. I can’t tell if this is a logic board issue or a battery issue. I am a student and money is tight and I NEED this computer to work, I can afford a bottom case with an original battery with a low cycle count or a new logic board from Ebay but not both. I could replace the battery with a Amazon or iFixit replacement but I don’t care if the battery is new, I just care that it doesn’t cause this throttling behavior. I’ve heard some reports about this happening because of dead batteries and some people say this happens when your SMC fails or Temp sensors fail. Any wisdom would be very helpful.
^(Note this is when the system is operating like normal. Tomorrow I can try to replicate the issue but I’m too tired/frustrated to go through it again tonight.)
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