Which one? Hello there! I want to add memory to my laptop I hava a Panasonic Toughbook CF-73 with 512MB of non remobable memory and an empty slot. I was ready to buy the 1GB but then they asked if mine was a DDR2 or just a DDR I have no idea then they say do not excced the manufaturer specs wich is 1.2GB or 1.5GB so what am i suppose to do?

Open the PCMCIA flap on the left hand side of the keyboard and it is on the bottom right, just below the card slot.

http://business.panasonic.co.uk/computer-product/panasonic-computer-product-solutions-service-and-downloads/panasonic-toughbook-service-and-downloads/toughbook-faqs

Press "F2" on your keyboard when you see the Panasonic logo appear on the screen. You will immediately be prompted to enter your Panasonic Toughbook Cf-29 BIOS password. Type the word "Biostar" into the password prompt. This is your Panasonic Toughbook Cf-29 backdoor BIOS password. Press the "Enter" key to unlock your Panasonic Toughbook Cf-29 BIOS.

According to Panasonic's Toughbook CFT8
owners manual there is only one slot where
you can add extra RAM. The other memory
is "non-removable" and probably soldered
directly to the motherboard.

I double checked on the Kingston RAM Website:
Bank Schema: 1GB Standard:
[1GB] (Non-Removable)
or

3GB Standard:
[1GB] (Non-Removable)
or

2GB Standard:
[2GB] (Non-Removable)
or

3GB Standard:
[2GB] (Non-Removable)
Sorry to disappoint you but that is how they
made the CFT8 Toughbook.

If it is any consolation, the CFC1 and CFC2 both have
two (2) slots on the underside of the unit. Not the CFT8.

Good Luck,
Regards,
Richard - Montreal Based
Panasonic Canada Toughbook Authorized Dealer since 1989

The CF29 comes in two basic flavors:
#1: With 256MB RAM and DDR Ram with One open slot.
So add a 1GB DDR RAM (PC-2700) DDR 333 and
the maximum RAM is now 1.2GB

#2: With 512MB RAM and DDR2 Ram with One open slot.
So add a 1GB DDR2 RAM (PC2-5300) and the
maximum RAM is now 1.5GB.

This is my experience and very frustrating to find out the
hard way that the CF29 does not support a 2GB DDR2
RAM Module.

Good Luck.
From Richard, Montreal Based Panasonic Canada Authorized Toughbook Dealer since 1989.

According to: http://www.upgradecomputermemory.com/ram.cfm/memory/P/Panasonic/Toughbook-Series/Toughbook-73-CF-73

your CF-73 has "integrated" 256MB of memory, and supports a maximum addition of 1GB of RAM.
The web-site says about $33, which _definitely_ is a good investment to speed-up your computer.

go look on panosonics web site youle find youre info there

i'm not sure what your configuration was in the computer before you tried installing the extra memory, but here's some common problems i see.

-it might exceed the maximum amount of memory that can be recognized in each slot or total for the computer

-it might have be installed in matching pairs (if it is a 2 memory slot machine which most are).

-it might not take that exact speed/rating

hope that helps

Web Site
http://www.panasonic.co.uk/html/en_GB/220239/index.html#anker_220239
Donot enter model# in first slot.
Enter Computers in second
Enter Toughbook in third
Select CF-27E
Everythink is there, two pages.
Manual isn't much use.

go to panasonic ca.com

You should be able to download the relevant manuals telling you where to look for your memory by visiting this page.