Question about Dell Latitude C640 P4 Mobile Notebook

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Dell laptop memory install

Dell latitude c640 , i just installed 2- 512 meg memory sticks on my dell c640 . i have win xp pro installed. after boot up , i go to system info, system summary, it shows total physical mem at 1024mb, but available physical mem only shows 375mb. How can i get the system to make all mem available. I already went into bios and did not see a option to change any value for memory. Maybe i missed something. Can u please help
Thanks Bob

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Available physical memmory is what all your programs on your comp is using like windows virus software drivers im thinking you probably have spyware or bugs in your comp that could be bringing memmory down

total physical memmory is what you just put in

Posted on May 09, 2008

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I have just reformatted a Dell latitude c640 laptop for a friend and installed windows xp pro up to service pack 2. upon reload first time the laptop is suffering screen tearing issue, it is like the...


It appears to be the issue with the ram. Turn off laptop, remove battery and unscrew the the cover to the RAM. Its on the back panel. Remove and reseat the RAM after cleaning the gold pins.

You can also use the Microsoft memory diagnostic tool.

Sep 25, 2010 | Dell Latitude C640 Notebook

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I want to now which ram is used for dell latitude 640, latitude 520, latitude 430, latitude 420 and inspiron 2200 is it ddr2 or ddr1 and max capicity for upgrade


Here are the max memory and speeds:
Lat C640 is Max 512M per stick DDR-266 (PC2100) or DDR333 ( PC2700 ) for a total of 1024 Meg

Lat D520 is either 2 or 4 Meg total. DDR2-667 ( PC2-5300 )
Although the memory can be installed one module at a time, the best performance comes from using matched pairs of modules.Maximum memory for systems with the Intel 945GM chipset is 4096MB, maximum memory with the Intel 940GML chipset is 2048MB
Lat D430 has only slot with a Max of 1 Meg. You can use DDR2-667 (PC2-5300)  or DDR2-533 (PC2-4200)

Lat D420 is a max of  1.5G    . Use 1GB DDR2-533 (PC2-4200)

Inspiron 2200 is one slot with a max of 1280 Meg. recomended is 1GB DDR-333 (PC2700)

Here is a link to find almost any memory you need:
http://www.crucial.com/index.aspx

NOTE:
When mixed speeds in the same PC, the memory will run at the slowest speed installed or the highest speed allowed by your system, whichever is slower.

Good Luck

Dec 17, 2009 | Dell Latitude C640 Notebook

2 Answers

Network Boot


hi,
i have dell c400 laptop, its to much simple to install xp
first you just take out hdd from laptop
plug in tht hdd in desktop pc by external usb box
now u just start windows 98 setup in it
when it started first format ur drive then install it
when windows 98 setup files copies to 100%. machine need to restart
u just plug out the hdd and plug in back to laptop
now the setup will remain start in ur laptop and when the installation complete u just upgrade ur windows from 98 to xp by intalling xp from external drive on OPERATING SYSTEM OF 98 WINDOWS
NOW WAT U SAY???
ITS TO MUCH SIMPLE just try once

Jan 29, 2009 | Dell Latitude C400 Notebook

3 Answers

Dell c640 audio problems


i installed windows xp service pack 3 in dell c640 latitude laptop after which the multimedia audio controller driver is not installed.

Apr 23, 2008 | Dell Latitude C640 Notebook

1 Answer

Can't increase resolution above 1024x768


try the radeon igp 350m driver ,I use this on xp pro ,many res choices.

Apr 09, 2008 | Dell Latitude C640 Notebook

5 Answers

OS installation.


is the old hard drive still working if it is you can clone the two

Jan 20, 2008 | Dell Latitude C640 Notebook

1 Answer

No 3d acceleration in Vista on ATI 7500


Well, I'm amazed a C640 runs Vista at all. There's no reason to buy a new hard drive, except for the novenlty of having one loaded with Vista on a C640. It's a great laptop, and runs Windows XP PRo perfectly well. If you have one od the Dell XP install disks, just boot from it, and whenever it finds the vista install, hit excape, then at the next screen hit "D" to delete the partition, then choose "quick format", and load the Operation system. If you need an install disk,let me know. Good luck

Sep 24, 2007 | Dell Latitude C640 Notebook

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