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Intel Core i7-720QM Processor (for mobile)

miz62
Beginner
562 Views

It has 1.6ghz

in turbo it can get to 2.8ghz

i understand it gets to 2.8 with one core

but if all the 4 cores are working it gets only to 1.7ghz

am i right?

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4 Replies
Aubrey_W_
New Contributor I
562 Views
You can find the specs and datasheet for this processor here: http://ark.intel.com/Product.aspx?id=43122&code=Intel%c2%ae+Core%e2%84%a2+i7-720QM+Processor+(6M+Cac...

Regards.

==
Aubrey W.
Intel Software Network Support
miz62
Beginner
562 Views
The source you gave doesn't tell what happen when all the 4 cores are working
gaston-hillar
Black Belt
562 Views
Hi Miz62,

A few months ago, I've written a simpleand brief post on Dr Dobb's Go Parallel regarding the microprocessor you mention and Turbo Boost. There is an example in C# with source code thatcan help you.

Measuring Speedup is Challenging with Intel Turbo Boost Technology

Hope it helps.

You can also read another post about the Intel Turbo Boost Technology Monitor. It will also help you to understand what's going on with this amazing technology.

Intel Turbo Boost Technology Monitor: A Windows Gadget to Understand Dynamic Frequencies

Hope it helps.

Cheers
TimP
Black Belt
561 Views
As Gaston pointed out, the Turbo mode speedup when all cores are active is far less than for a single core, due to thermal limits.
Also frequently of interest is the low efficiency of Turbo mode; the best case I have seen for a large application was a 7% performance increase for a 15% increase in system power consumption with a 10% clock speed boost.
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