![]() ![]() I devised a simple battery-testing script to simulate light and moderately heavy loads on my brand new, mid-2014-generation, base-model 15-inch Retina MacBook Pro: it loads some popular websites in Safari over Wi-Fi, spending some time scrolling down each one, while playing music in iTunes, then appends the time and battery status to a file in Dropbox, which promptly gets synced. Turbo Boost Switcher can temporarily disable Turbo Boost, and I was curious to see if disabling it would meaningfully affect battery life. The advertised clock speed - 2.2 GHz for the base-model 15-inch - is only the guaranteed minimum. ![]() Modern Intel CPUs use Turbo Boost to dynamically increase CPU speed, depending on workload, up to their thermal limits. I used to eke more battery life out of my 2008 MacBook Air by underclocking and undervolting its CPU to a lower speed with CoolBook, but that’s no longer possible on modern Macs. ![]() The best battery life in the 15-inch Retina MacBook Pro line is the base model (without the high-powered GPU), but Apple’s stated 8–9 hours of battery life is only achievable with very light use - if you’re using tools like Xcode, Logic, or Lightroom, you’re lucky to get more than 4 hours. A programmer, writer, podcaster, geek, and coffee enthusiast.Ībout Disabling Turbo Boost to get more MacBook Pro battery life
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