<sevendust62@hotmail.com> wrote in message
news:680aaa92.0308112005.6d5f905e@posting.google.com...

Toni Alfirevic <toni.alfirevic@fer.hr> wrote in message

news:<1mkdiwqa840ci.uoy4lx6dcmyd$.dlg@40tude.net>...

On Wed, 30 Jul 2003 10:01:30 +0200, FalconFly wrote:

Yep, that is one hell of a CPU...

Makes me wonder why they didn't make a Desktop Version.
Just imagine a 3000MHz Centrino... o.0

Maybe they'll implement some of that "advanced_technology" into

Prescots.

If you read a tech brief, you'll see why Centrino cannot be
implemented as a 3 GHz. The reason Centrino is so fast given its speed
is that it is a shorter pipelined architecture than the Pentium 4.
While a Pentium 4 is a 20 pipelined processor, the Pentium M is only
12 pipelines. This makes it more efficient than the Pentium 4, but
also makes it hard to reach high speeds. Until Intel's 90 nanometer
process is perfected and applied to Banias (current Pentium M
codename)'s successor Dothan, the Pentium M is predicted to not be
able to surpass 2 GHz. Even that speed would be very difficult to
reach. Someone may know of the trouble Intel had making the Pentium 3
surpass 1 GHz. That problem was because the Pentium 3 was a 10 staged
processor architecture. The Pentium M is 12 staged, and because of
that, it will top out around 1.8 to 2 GHz. A good explanation of
exactly what makes the Pentium M so different than either the Pentium
3 or 4 can be found at
http://www.anandtech.com/mobile/showdoc.html?i=1800. But basically,
the Pentium 4 allows super high speeds, and the Pentium M allows much
slower speeds, but more efficient use of the speed it has. Since
higher speed requires more power, the Pentium M allows optimal use of
the limited power a notebook possesses, while a Pentium 4 can take
advantage of the effectively limitless power of a wall power jack.

Nice analysis IMHO. Short pipeline + Large L2 cache + Good
instruction/pre-fetch/branch prediction set = Excellent processing for
SETI/GIMPS type problems.

To see proof of the (even slower clocked) Banias' SETI performance we need
to look no further than positions 11 & 14 here:

http://cox-internet.com/setispy/tlctop200.htm

FWIW Intel's roadmap for the Pentium-M shows not just a higher clock
speed of 1.9/2.0G in Q1/Q2 '04, but an increase in L2 cache to 2MB!

Now that faster clocked baby w/a 2M cache ought be somethin' to see...
--
Strat�




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