memory upgrade on acer 4001

Hello world

I want to upgrade memory to 1 GB. Current modules are those preinstalled by Acer and are PC2700. Now, since the CPU is a Pentium M 715 (with 400 MHz FSB) can I put 400 MHz DDR RAM?

Thanks in advance.

Micio

 

Yes you should be able to. But rather oddly, on Kingston, the RAM for the acer TravelMate 4001 seems to be clocked at 333Mhz.

Are you sure your FSB is 333Mhz?

http://shop.kingston.com/partsinfo.asp?ktcpartno=KAC-MEMC/1G&bannersource=pricegrabber&promo=prcgrbr

 

The FSB doesn't have to match the RAM speed, although it is better if it does. There's not a huge difference either way.

I'd buy another PC2700 stick of and put it in alongside one of the 256MB sticks you already have in your laptop for a total of 1.25GB. You can use 400MHz DDR RAM (your FSB is 400MHz), but the RAM will only run as fast as the slowest stick.

 

I've missed a piece of information: my target configuration is 2 x 512 MB RAM to take advantage of dual channel. My Intel Centrino 715 has a 400 MHz FSB.

Corsair, GeIL and VData build PC3200 400 MHz SO-DIMM DDR modules.

Thanks for your help

Mic

 

Uhm... Looking for more infos on i855GME chipset, I've found this piece of specs directly by Intel:

The GMCH system memory controller directly supports the following:
• One channel of PC1600/2100 SO-DIMM DDR SDRAM memory (Intel 855GM GMCH)
• One channel of PC1600/2100/2700 SO-DIMM DDR SDRAM memory (Intel 855GME
GMCH)

So:
1. no dual channel
2. buying PC3200 RAM is useless

Am I wrong?

 

Hm, you're right. The 855GM can only use DDR333 (PC2700) memory or less. Dual-channel makes no difference anyway; the Pentium M can't make much use of the extra bandwidth it provides.

So, go for PC2700 memory and don't worry about the dual-channel business.

 

@chaz: The 855GM chipset supports up to 266 MHz. The one supporting 333 MHz is 855GME. Wanted to give a more updated information, as I checked Intel's webpage recently.