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Intel Core i7-680UM Low power processor review

October 25th, 2010 Leave a comment Go to comments


The clock frequency of the intel core i7-680um is 1.46 GHz.  The core i7-680UM is intended for the low power notebook designs. Its TDP ( Thermal Power Design) rating is just 18 Watts.  The core i7-680UM  does support  turbo boost. With the turbo boost the clock frequency can go upto 2.53 GHz. This means that with this processor the peak performance does not suffer.  The core i7-680UM consumes low power, have good battery life without sacrificing peak performance level.

The core i7-680UM has 2 cores ( not to be confused that some of the core i7 DO come with 4 cores – this one does not).

While core i7-680UM does contain the integrated intel HD graphics – the nominal clock frequency of the graphics section is 166 MHz, which is pretty low. Notice that the intention is to keep the normal power consumption as low as possible. The graphics processor, however, does support the turbo function,  and  its turbo frequency can increase to 500 MHz on demand.

The main CPU section is built with 32nm lithography while the graphics and the memory controller is built with the 45 nm technology.

The Level 3 cache in the core i7-680UM is 4 MB. The communication with the memory is using the integrated DDR3 memory controller. The speed supported is DDR3-800. The core i7-680UM communicates with the chipset using DMI bus – a fast differential bus with good bandwidth.

The core i7-680UM does support many advance features of the core ix series, including, intel virtualization (VT-x and VT-d), AES function support, Intel trusted execution technology among others.

There are very few notebooks seen at the time of writing which has Intel Core i7-680UM . We found that Acer Aspire TimelineX AS1830T-68U118 does use this processor and boasts a battery life of 8 hours. The decent performance notebook with huge battery life shows the strength and promise of the intel core i7-680um.

We should expect even better performance with the forthcoming Sandy Bridge low power processors. Since the integrated graphics of the sandy bridge is built with 32 nm technology, it should be reasonable to expect higher graphics performance at same power consumption.

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  1. Johan
    January 15th, 2011 at 13:42 | #1

    “The core i7-680UM does support many advance features of the core ix series, including, intel virtualization (VT-x and VT-d), AES function support, Intel trusted execution technology among others.”

    Never get a processor that got the trusted execution technology feature if you want to stay in charge of your computer:
    http://www.gnu.org/philosophy/can-you-trust.html
    http://en.wikipedia.org/wiki/Trusted_Execution_Technology