Anyone with Mac with Intel Haswell and Broadwell should try VoltageShift!

I recently got my hand on MacBook Pro 2015'' and while looking for best way to improve it I stumbled upon VoltageShift way to undervolt and limit TDP and turn on and off turbo boost on our Macs.

Here is detailed guides how do it and what is about first unervolt and second is limit for TDP.

https://www.reddit.com/r/mac/comments/130cln7/2015_macbook_pro_13_inch_refresh_guide_thermal/

https://www.reddit.com/r/mac/comments/15n1q3y/how_to_improve_an_intel_macbooks_battery_life_by/

Here are two videos if anyones needs them
https://youtu.be/TvUsCcDU5kc?si=WcpG60VR47VFPujQ
https://youtu.be/TvUsCcDU5kc?si=nm0JV39OPFa2vj0X

Many other tweaks people recommend on reddit work great as well. ( not using all of them but tried)

1. Accessibility - Display - reduce motion, reduce transparency, disable auto-play animated images
2. Appearance - Highlight color - choose one color instead of multi, disable allow wallpaper tinting in windows
3. Apple intelligence & siri - disable if available
4. Desktop & dock - Minimize windows using scale effect, disable animate opening applications, disable Stage Manager, disable Use iPhone widgets
5. Displays - disable automatically adjust brightness
6. Screensaver - Disable screensaver so your screen just turns off (might need to goto Lock Screen settings for this)
7. Wallpaper - choose a static (not-animated) background or solid color
8. Turn off some synching of iCloud stuff
9. Mac fan control set to iGPU 50-80C
10. Spotlight indexing off
11. Turbo boost switcher
12. Manage startup apps
13. Reset NVRAM and SMC

Undervolt cuts 25% of power draw which is around 5W under full load in Cinebench r23 and brings down temps by around 10C. ( undervolted everything -80mv)

Cinebench r23 multi runs flat 3.1ghz for me with 75 C for CPU

Geekbench 6.4 on Monterey with undervolt

https://browser.geekbench.com/v6/cpu/11062251

This is better than stock raspberry pi 5 and similar to overclock one to 3.0ghz+.