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The MBP's fan runs at 1300 RPM under normal circumstances, and didn't go beyond 2200 RPM with the CPU at 400% for some time, which is barely audible. When using 400% CPU time (such as when encoding video with Handbrake), the MBA's fan quickly spins up from its regular 2000 RPM, eventually reaching 6500 RPM, which is quite noisy.

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The MacBook Pro's TDP is 28 W, so it can run at full blast with thermal room to spare. However, for the Air this is above its 17 W Thermal Design Power (TDP), so it quickly throttles back the CPU frequency. Interestingly, the MacBook Air and the MacBook Pro use roughly the same amount of power with the CPU at full utilization: the MBA a little over 20 W, the MBP a little under. The MacBook Air runs into its power limits very quickly when using both cores fully, so the CPU clock has to be throttled back significantly below the maximum 2.6 GHz. The MacBook Pro can do 1.9 times as much work when using both cores, but the MacBook Air only sees a 40% improvement when going from using one to using two cores. It looks like MacOS doesn't make the second core sufficiently idle to fully benefit from the turbo boost.Ĭinebench 15 CPU, default number of threads (4) When running the Cinebench benchmark with 4, 2 or 1 CPU threads, it becomes clear that the MacBook Pro is much better at multithreaded tasks:įor some reason both computers stick to a 2.6 GHz CPU frequency most of the time even under single threaded loads.

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Unfortunately, using QuickTime to convert to 480p, 720p or 1080p using the respective presets, which uses QuickSync, does result in really large files, so in practice it's not all that useful. However, things are better for certain benchmarks and real-world tasks: These numbers are not particularly exciting, especially considering that I went from a two-year-old 'Air' to a brand new 'Pro' machine. (Update : the link doesn't work anymore, but find new links and more background info on the Powergadget in this PCGuide article.)īut let's have a look at some benchmarks first. You can monitor the CPU frequency and power use of your Intel CPU with the Intel® Power Gadget. The maximum CPU frequency (when using one core) is 2.9 GHz, same as the Air. I haven't been able to find any information on which turbo ratios apply to the 2.4 GHz frequency with two cores in use, but it looks like this is also 2.6 GHz. The new MacBook Pro has a 2.4 GHz Core i5-4258U CPU with 3 MB 元 cache. This CPU has 4 MB 元 cache, and although it's advertised as a 1.8 GHz part, it actually runs at 2.6 GHz with both cores active, and turbo boosts to 2.9 GHz when only one core is running.

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I paid extra for the upgrade to a 1.8 GHz Core i7-2677M CPU. What I'll be doing here is compare the new MacBook Pro to my old mid-2011 MacBook Air. Sometimes by a lot, sometimes by a little.

This is the second one, looking at CPU performance.Įvery time I bought a new computer, it was faster than the previous one. Over the next few days, I'll publish my review of the new 13' MacBook Pro here in several installments. No more bottlenecks: the late 2013 MacBook Pro reviewed Late 2013 MacBook Pro review: CPU performance

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