The MacBook Pro includes an automatic switching between processor graphics ( Intel HD Graphics 3000) and the 6770M depending on the software under Mac OS X. At the time of writing, this is only disadvantageous in few applications. Since the introduction of the Thunderbolt interfaces, graphics solutions are only connected via PCIe 8x by the way. This can definitely be advantageous in multi monitor configurations under Mac OS X. Contrary to the entry-level model the more powerful model features 1 GB GDDR5 and not only 512 MB. Therefore, it is not much faster than the Radeon 6750M running at 600 MHz in the entry-level model.
USED 2011 MACBOOK PRO 15 WINDOWS
In the reference design (and in Windows laptops we know) the clock rate is 725 MHz, but Apple uses a clock rate of 675 MHz. So, the throttling is presumably caused by an insufficiently dimensioned power adapter.īesides the faster processor the built-in AMD Radeon HD 6770M graphics card is the second change in the MBP 15. However, thermal throttling does not occur and a core temperature of 86☌ (CPU approximation) and 78☌ (GPU) means that the cores do not get too hot. In the demanding Battlefield 3 the clock rates of the cores alternate between 2, 2.4 und 3.2 GHz. In Burnout Paradise, all four cores are clocked at 3.2 GHz. Depending on the game, we could observe different characteristics. After all, the clock rate reaches 3.4 GHz in the single core test of Cinebench 11.5.
USED 2011 MACBOOK PRO 15 FULL
While the Intel Turbo Boost 2.0 can apparently not use the full potential of the CPU (power adapter, cooling), it could still reach the maximum clock rate of 3.5 GHz in our test (low load, 1 core). Nevertheless the processor performs better than the 2720QM in the early 2011 powerful MacBook Pro 15 model as it was also unable to run at full CPU speed. This explains why the CPU is slower than expected. During our tests sometimes thermal throttling occurred (e.g., Cinebench 10 Multi). On average, the 2760QM can barely reach the level of other 2760QM laptops (0-12% faster) and is on par with 2670QM / 2720QM CPUs. We analysed the CPU performance under Windows (Bootcamp) in detail. A TDP of 45W means that the current quad-core processors are not really thrifty, but offer enough theoretical performance for all all fields of application. If the high Turbo speed can be used to capacity, the performance approaches the 2920XM, the former top model. Compared to the slower clocked Core i7-2670QM in the entry-level model of the 15-inch series, the 2760QM also supports VT-d. In theory, Turbo Boost can raise the base clock of 2.4 GHz up to 3.5 GHz (if only 1 core is loaded). The processor features four physical cores and thanks to HyperThreading it can process up to 8 threads at a time. The built-in Intel Core i7-2760QM belongs to the Sandy Bridge Refresh 09/2011 and replaces the Core i7-2720QM in Intel's product range.
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