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From: Lu.Pi. on 12 Jan 2010 15:07
I own the laptop in subject

• Intel® Celeron® - 2,6 GHz 400MHz BUS Cache 128 KB
• 256 MB PC2100 DDR 266 MHz

I'd like to search on ebay two 512mb RAM or one 1 gb (the maximum
supported).
However opening the notebook I noted that the ram installed says
PC2700 (please look at the pictures)
http://i50.tinypic.com/2ypi0l0.jpg
http://i45.tinypic.com/2z66ut3.jpg
Even if the instruction booklet says to use only PC2100.
I am a bit confused, which type of ram should I search?
regards
Luca
From: jfg on 12 Jan 2010 16:47

"Lu.Pi." <lupi_unisci_a_cci(a)libero.it> wrote in message
news:hiikpa$gig$1(a)tdi.cu.mi.it...
>I own the laptop in subject
>
> . Intel� Celeron� - 2,6 GHz 400MHz BUS Cache 128 KB
> . 256 MB PC2100 DDR 266 MHz
>
> I'd like to search on ebay two 512mb RAM or one 1 gb (the maximum
> supported).
> However opening the notebook I noted that the ram installed says
> PC2700 (please look at the pictures)
> http://i50.tinypic.com/2ypi0l0.jpg
> http://i45.tinypic.com/2z66ut3.jpg
> Even if the instruction booklet says to use only PC2100.
> I am a bit confused, which type of ram should I search?
> regards
> Luca

Most PC2700 RAM is backwards compatible with PC2100 so that's why your
laptop runs ok with it. Which to buy as an upgrade? Either. If you get
PC2700 it will run just as if it were a PC2100 (that is, slower). Try eBay
and get whichever is the best price, lowest shipping, etc. Watch the
feedback of the seller. Also, the lowest prices seem to be when RAM is
shipped from Hong Kong. Nothing wrong with that, it's just that shipping
takes much longer. Best...J


From: Paul on 12 Jan 2010 17:54
Lu.Pi. wrote:
> I own the laptop in subject
>
> • Intel® Celeron® - 2,6 GHz 400MHz BUS Cache 128 KB
> • 256 MB PC2100 DDR 266 MHz
>
> I'd like to search on ebay two 512mb RAM or one 1 gb (the maximum
> supported).
> However opening the notebook I noted that the ram installed says
> PC2700 (please look at the pictures)
> http://i50.tinypic.com/2ypi0l0.jpg
> http://i45.tinypic.com/2z66ut3.jpg
> Even if the instruction booklet says to use only PC2100.
> I am a bit confused, which type of ram should I search?
> regards
> Luca

The largest capacity SODIMM you can use is 512MB. You can use two 512MB.
You cannot use a single 1GB DIMM according to this.

http://www.ec.kingston.com/ecom/configurator_new/modelsinfo.asp?SysID=17441

http://www.crucial.com/store/listparts.aspx?model=Pavilion+ze5500+Series

As "jfg" indicated in his answer, faster memory is compatible with slower
applications. DDR400 works in a DDR333 or DDR266 system. DDR333 works in
a DDR266 system. That is why HP/Compaq could put PC2700 in a PC2100 system.

According to this, the ZE5500 uses a Celeron 2.6GHz connected to an
ATI 345M Northbridge. The closest match to that, is shown at the bottom
of this page (the ATI 340M).

http://ati.amd.com/products/MobilityRadeon7000igp/features.html

(Table at the bottom of the page)

Feature Radeon IGP 340M
Memory Speed DDR266
Maximum memory 1GB (divided into two SODIMM slots, as explained in the text above the table)
Graphics Core ATI Mobility Radeon

Paul
From: Lu.Pi. on 13 Jan 2010 02:07
Il 12/01/2010 22.47, jfg ha scritto:
> Most PC2700 RAM is backwards compatible with PC2100 so that's why your
> laptop runs ok with it. Which to buy as an upgrade? Either. If you get
> PC2700 it will run just as if it were a PC2100 (that is, slower).

thank you to you and to Paul for the usefull answers.
If you say that PC2700 are faster than PC2100 I think that I will chose
the first one. Prices seems to be similar and for such a low amount I
think it's better to buy inside EU in order to avoid customs and high
shipping charges.
Do you think that with an upgrade of memory I will speed up the laptop?
Or the real "bottleneck" is the slow HD (40GB EIDE, ATA 100 4200 rpm)?
regards
From: Paul on 13 Jan 2010 03:31
Lu.Pi. wrote:
> Il 12/01/2010 22.47, jfg ha scritto:
>> Most PC2700 RAM is backwards compatible with PC2100 so that's why your
>> laptop runs ok with it. Which to buy as an upgrade? Either. If you get
>> PC2700 it will run just as if it were a PC2100 (that is, slower).
>
> thank you to you and to Paul for the usefull answers.
> If you say that PC2700 are faster than PC2100 I think that I will chose
> the first one. Prices seems to be similar and for such a low amount I
> think it's better to buy inside EU in order to avoid customs and high
> shipping charges.
> Do you think that with an upgrade of memory I will speed up the laptop?
> Or the real "bottleneck" is the slow HD (40GB EIDE, ATA 100 4200 rpm)?
> regards

I forgot to include the most important link in my previous answer. This person
bumped up his memory a bit, but without a big speed bump. He tested
his disk with HDTune, and the performance curve suggest the disk was
in PIO mode, instead of DMA. That would suck the life out of the
computer and make it feel sluggish. It should be able to do better
than 5MB/sec as shown in the picture.

http://www.tomshardware.com/forum/50544-35-laptop-damn-slow-fresh-install-lies-bottleneck

Paul
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