Help with RAM speeds

Hey guys, really hope one of you can help me with my issue im having.
Ok so the deal is, 512mb ram is getting way too slow for what i need them for, so im going to upgrade to 2gb ram (1gb x 2 units). The thing im having trouble with is the speed or clock speed. I look at ads on eBay and they always mention 2gb ram 667mhz or 533mhz or 800mhz or whatever. Im not familiar with this, how do i know whats right for my computer?
I've run EVEREST on my computer and this is what i see under my motherboard:

Code:

--------[ Motherboard ]-------------------------------------------------------------------------------------------------

    Motherboard Properties:
      Motherboard ID                                    <DMI>
      Motherboard Name                                  Dell Dimension 8400

    Front Side Bus Properties:
      Bus Type                                          Intel NetBurst
      Bus Width                                         64-bit
      Real Clock                                        200 MHz (QDR)
      Effective Clock                                   800 MHz
      Bandwidth                                         6400 MB/s

    Memory Bus Properties:
      Bus Type                                          Dual DDR2 SDRAM
      Bus Width                                         128-bit
      Real Clock                                        267 MHz (DDR)
      Effective Clock                                   533 MHz
      Bandwidth                                         8533 MB/s

    Chipset Bus Properties:
      Bus Type                                          Intel Direct Media Interface

    Motherboard Manufacturer:
      Company Name                                      Dell Computer Corporation
      Product Information                               http://www.dell.com
      BIOS Download                                     http://support.dell.com

Hope that helps.

Thanks, looking forward to a reply

Fritz

 

There's your answer - 553mhz

 

Hi fritz117
Welcome to Major Geeks :major

If you go to
http://www.crucial.com/

there are 2 tools you can use which will guarantee the right RAM for your system

Crucial Memory Advisor™ Tool
will tell you what you can use in your system
after you tell it you have a
Dell Dimension 8400

The Crucial System Scanner
will tell you what is already installed

Just because you have 533MHZ installed at the moment, does not mean that 800MHZ is not suitable for your system

Good luck