SO DDR SDRAM - PC2100

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Hello,

Recently I have purchased a Sony Vaio notebook. At the same order I had
added extra memory by the supplier. (1 Gb)

Because the battery is more fast empty than expected I am looking to
causes. I was curios what kind of memory the Notebook contained.

Nevertheless memory modules could use less or more power consumption, I
was not as happy with the choice of the modules used by the supplier.


Most memory modules do contain separate chips welded to the base plate,
(fixed by the many "legs" from the chip). A less often occurring type
(and the type what is placed to my Sony notebook) is that the memory is
a component of the base itself, covered by a sort of thick black plastic
"splotch" material. Possible a more cheap production process.
http://www.swissbit.com/haupt.asp?callNv=2112&nv=2214&spr=2

In the past, once I have read that these last type of memory modules are
less reliable. By the temperature difference, the black synthetic cover
do have the tendency to loose from base during time, in which the memory
shall become corrupted.

Does someone has more background knowledge about it?

Bt my personal feeling, I have payed a high "Sony" price (certainly not
the cheapest at all), and did get the most cheap none reliable modules.

Besides, those modules are fairly warm, when you put your hand at the
downside of the notebook. Maybe more "cold" memory modules, don't spend
as much power to "heat".

Do someone has more experience and can give advice?
 
Léon Obers said:
Recently I have purchased a Sony Vaio notebook. At the same order I had
added extra memory by the supplier. (1 Gb)

Because the battery is more fast empty than expected I am looking to
causes. I was curios what kind of memory the Notebook contained.

Nevertheless memory modules could use less or more power consumption, I
was not as happy with the choice of the modules used by the supplier.

Most memory modules do contain separate chips welded to the base plate,
(fixed by the many "legs" from the chip). A less often occurring type
(and the type what is placed to my Sony notebook) is that the memory is
a component of the base itself, covered by a sort of thick black plastic
"splotch" material. Possible a more cheap production process.
http://www.swissbit.com/haupt.asp?callNv=2112&nv=2214&spr=2
Click to expand...
Those memory modules use Micron Technology chips who are one of the worlds
top notch producers.
The assembly process is called COB, chip-on-board and its regarded as a high
reliability process.
http://www.national.com/appinfo/die/0,1826,502,00.html
Even good enough for NASA to consider for space missions:
http://nepp.nasa.gov/docuploads/C9F16FD3-4469-40A4-89C7B62C7DF21756/Chip on Board Reliability.doc

Yes, adding large amount of memory to a notebook will reduce its battery
life. Notebooks typically consume 25 - 35W. 512MB memory module needs extra
4.5W and 1GB 8W. So adding 1GB RAM to a Centrino will reduce its battery
time by 25%.
 
Hello,

Thanks for your answer and links.
Seems there is no worry at all, to have such kind of memory into my
notebook.
Yes, adding large amount of memory to a notebook will reduce its battery
life. Notebooks typically consume 25 - 35W. 512MB memory module needs extra
4.5W and 1GB 8W. So adding 1GB RAM to a Centrino will reduce its battery
time by 25%.
Click to expand...

Unfortunately I wasn't informed good enough by the capabilities of a
Centrino based notebook, and choose the wrong model at this point. Now I
have a much more battery power asking Pentium 4 - 2,66 Ghz. About the
same processor power as a Centrino 1,6 Ghz. My battery is empty after
about 75 - 80 minutes.

First I was in the supposition, that a "1,6 Ghz" processor, was not as
fast as a Pentium 4 - 2,66 Ghz
 
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