Puzzling performance issue

Do you have a question? Post it now! No Registration Necessary.  Now with pictures!

Threaded View
I was testing two laptops:

#1 2004 Toshiba A45-S121, Celeron M 2.8GHz, 128k Cache, 400MHz FSB, 256
megs single channel DDR memory.

#2 2006 Toshiba A105-S2712, Centrino Pentium M 740 (1.73GHz), 2MB Cache,
533MHz FSB, 1GB of dual channel DDR2 memory

Both systems running Windows XP SP2 Home edition.

I ran a benchmark performance test on both systems, the test was
PassMark Version 4 (it was an optional component of Norton SystemWorks

I expected the A105 to do a lot better, but much to my surprise, the A45
did better on the performance test in almost all CPU and memory tests
(disk I/O on the A105 (which has SATA 5400 rpm drive) was faster, and
the video tests were a lot faster, but on all of the memory and CPU
tests the A45 pretty much killed the A105).

Anyone have any idea why?  As far as I can tell, the A105, which has
Speedstep and other power savers, was running at full speed (it was
plugged into the wall for the tests).

Re: Puzzling performance issue

Barry Watzman wrote:
Quoted text here. Click to load it

Not being familiar with exactly what the benchmarking tasks are, my
guess would be that the tests are simple instruction executions, in
which case the Celeron running at the higher clock speed will complete
them faster.

The Celeron is a great processor for casual users, as casual users are
usually not doing anything too intensive and only one major task at a
time.  In this scenario, the key variables that would determine
execution speed are clock speed and available resources (e.g. RAM,
video RAM), and not the type of processor.  If the user is doing more
intensive things like gaming, video, and developing, then the
performance difference will begin to be demonstrated.


Re: Puzzling performance issue

Barry Watzman wrote:
Quoted text here. Click to load it

The A105 should have smoked the A45.  The A105 CPU isn't stuck at 1Ghz
for some reason, maybe having battery mode power saving settings in the
AC power settings in Power Options?


Re: Puzzling performance issue

No, I'm quite certain that the A105's Pentium M is operating at full
speed, according to the power control panel (and the laptop is plugged in).

Quaoar wrote:

Quoted text here. Click to load it

Site Timeline