Which, on the one hand, is brilliant for extending your laptop battery life. The flipside is that the MacBook Pro also took a percent performance hit. There are two options available for switching off Turbo Boost on your laptop.
From here you can toggle Turbo Boost on or off, depending on the level of performance you require. If that is not an option, you should consult our laptop undervolting guide , which uses ThrottleStop to restrict CPU power draw.
That means you can maintain a higher clock speed for a longer period. Other features work alongside those increments:. If you've read through this and wonder how you turn Intel Turbo Boost on, you don't have to worry. Your computer will use Turbo Boost automatically. The likelihood is that you use Intel Turbo Boost all of the time without realizingbecause that's how it is meant to work.
As mentioned in the section regarding laptops and Intel Turbo Boost, there are some reasons why you might consider switching Turbo Boost off. But you should only do that if you absolutely must. Turbo Boost is a great feature. Still, Intel Turbo Boost provides an extra bit of processing power when you need it.
Even if you're not pushing the CPU, you know that you have the processing headroom if you desire. Operation of Turbo Boost is unpredictable. However, it provides an excellent CPU power boost. Before Turbo Boost, choosing a dual-core or quad-core processor was a headache. Many dual-core processors have faster clock speeds than quad-core processors, simply because having multiple cores increases power consumption and heat generation.
Some programs, such as games, prefer dual-core processors, while others, like 3D rendering software, favor the quad core. If you use both types of applications, you must make a choice and cannot get maximum performance for both programs from one processor. The extra processing power means more power consumption.
On desktop computers, the increased power demand of Intel Turbo Boost is not an issue. Meanwhile, if you use a laptop with a limited battery life, Turbo Boost will affect the battery life of the device. In a laptop, the potential for quad-core 3. Combine that number with the rest of the chipset, the memory, a high-end graphics chip, and a big high-resolution LCD panel, and the whole laptop might be consuming 80WW when running all-out.
If the XM were configured to run all of its cores at 3. Though it's true that some original equipment manufacturers make laptops using desktop Nehalem processors; they're just huge, heavy, and hot.
So Intel calculated how much it has to slow down the XM in order to meet the industry-standard definition of TDP, which amounts to a worst-case real-world workload running on all four cores.
Maximum power is defined in terms of a worst-case synthetic "power virus," but since real applications aren't that brutal in their processing demands, maximum power is only of interest to chip and system designers. For the XM, that slowdown worked out to 2GHz, and that's why the chip is rated at that speed. It's worth looking at the previous Extreme Edition mobile processor, the Core 2 Extreme QX, which is a quad-core chip that can run all four cores continuously at 2.
In spite of the QX's faster clock speed, there will still be many situations where the XM is faster on quad-core workloads because of the newer Nehalem microarchitecture, which usually gets more work done per clock period. I haven't seen any good benchmarking comparisons between these two chips. Intel published some selected benchmarks at IDF, but not many, and it isn't clear to me what aspects of chip performance were being stressed.
But for dual-core and single-core performance, the XM should be much faster than its predecessor, combining the superior Nehalem architecture with the higher clock speeds enabled by Turbo Boost. The QX has a simpler feature called Dynamic Acceleration Technology, but its effect is limited to only about one speed grade, roughly 10 percent.
In most dual-core cases, and I think in all single-core cases, the XM will be much faster for the same power consumption. Turbo Boost constantly monitors the power consumption, temperature and activity of each processor core. When an application makes high processor demands on one or more cores, the Turbo Boost technology gradually increases the speed of each affected core in Intel's Turbo Boost technology is found in their dual and quad-core i7 and i5 processors.
These processors have a wide range of normal and Turbo Boost speeds depending upon the number of cores and the devices they are used in. For instance, the Intel Core iU dual-core processor — used in some notebook and Ultrabook PCs — normally runs at 1.
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