High or Low dense?Wich is compatible for my PC???

I'm looking for some new memory for my pc.Right now I have 64 mb and want to add or update 256 mb.
I've done some research online and I've learned alot, but I'm still not sure wich one is the best since I'm a bit confused about high and low density and if my pc will accept high dens chips.I would very much appreciate some help,Thank You!!!!Here are my pc specs:

Computer
Operating System Microsoft Windows 2000 Professional
OS Service Pack Service Pack 4
Internet Explorer 6.0.2800.1106 (IE 6.0 SP1)


Motherboard
CPU Type Intel Pentium IIIE, 550 MHz (5.5 x 100)
Motherboard Name Intel Cayman CA810 (4 PCI, 2 DIMM, Audio, Video)
Motherboard Chipset Intel Whitney i810E
System Memory 64 MB (PC100 SDRAM)
BIOS Type AMI (02/24/00)
Communication Port Communications Port (COM1)
Communication Port ECP Printer Port (LPT1)

Display
Video Adapter Intel Corporation 810 Graphics Controller Hub (4 MB)
3D Accelerator Intel i752
Monitor Dell E550 (7753T202301O)

Multimedia
Audio Adapter Creative SB PCI128 (Ensoniq ES1371) Sound Card

Storage
Floppy Drive Floppy disk drive
Disk Drive Maxtor 51024U2 (10 GB, 7200 RPM, Ultra-ATA/66)
Optical Drive SONY CD-RW CRX220E1 (52x/24x/52x CD-RW)

Partitions
C: (FAT32) 9748 MB (1798 MB free)

Input
Keyboard Standard 101/102-Key or Microsoft Natural PS/2 Keyboard
Mouse Microsoft PS/2 Mouse



Peripherals
USB Device 2Wire USB Remote NDIS Ethernet

Don't know wich one of these specs you need ,but I rather give too much than too little!
If anyone knows where online to get cheap but reliable and quality Ram ,please let me know!

 

These specs might help too:

Memory Controller Properties
Error Detection Method None
Error Correction None
Supported Memory Interleave 1-Way
Current Memory Interleave 1-Way
Supported Memory Speeds 70ns, 60ns, 50ns
Supported Memory Types DIMM, SDRAM
Supported Memory Voltages 3.3V
Maximum Memory Module Size 256 MB
Memory Slots 2


Memory Module Properties
Socket Designation J6F1
Type DIMM
Speed 50 ns
Installed Size 64 MB
Enabled Size 64 MB

Memory Device Properties
Form Factor DIMM
Type DRAM
Type Detail Synchronous
Size 64 MB
Speed 100 MHz
Total Width 64-bit
Data Width 64-bit
Device Locator DIMM1
Bank Locator BANK0


Memory Device Properties
Device Locator DIMM2
Bank Locator BANK1

It's all chinese to me but maybe it helps to have this info for anybody trying to help me?Am I losing it?Hmmmm....

 

as far as i know high density = cheap and not reliable

 

crucial makes good memory
http://www.crucial.com/store/listpa...oards&mfr=Intel&cat=RAM&model=CA810&submit=Go

 

Hi.

low density= high compatability and high density is hit or miss unless you get exactly what your system needs.

If you where shopping for mem on ebay do your self a favor and buy from a retail vendoer such as newegg.com or directron.com

Rick