topic Intel Core i7-720QM Processor (for mobile) in Intel® Moderncode for Parallel Architectures

Intel Core i7-720QM Processor (for mobile)

miz62 — Sun, 18 Jul 2010 15:51:49 GMT

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?

Intel Core i7-720QM Processor (for mobile)

Aubrey_W_ — Wed, 21 Jul 2010 19:24:01 GMT

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+Cache%2c+1.60+GHz)

Regards.

==
Aubrey W.
Intel Software Network Support

Intel Core i7-720QM Processor (for mobile)

miz62 — Thu, 22 Jul 2010 17:30:11 GMT

The source you gave doesn't tell what happen when all the 4 cores are working

Intel Core i7-720QM Processor (for mobile)

gaston-hillar — Mon, 26 Jul 2010 18:14:09 GMT

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

Intel Core i7-720QM Processor (for mobile)

TimP — Mon, 26 Jul 2010 21:28:03 GMT

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.