Difference between KVR400X64C3AK2/1G and KVR400X64C3A/1G

i am trying to upgrade an old pc of a mate of mine and am having a problem trying to find some cheap memory.the motherboard in question is a gigabyte GA8IPE775 G.

KVR400X64C3AK2/1G and KVR400X64C3A/1G both appear to be compatible with this board but as it already has 2 sticks of KVR400X64C3A/512 running in dual channel i was hoping to keep these and add 2 more 1gb modules.

what would be the difference between the 2 different models of memory? and what would route would you recommend i take?

any information and/advice would be much appreciated

thx
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More about difference kvr400x64c3ak2 kvr400x64c3a
  1. KVR400X64C3AK2/1G is a kit of 2 x 512MB modules. KVR400X64C3A/1G is a single 1G module; you need 2 for dual channel mode. I'd add 2 x KVR400X64C3A/1G if he wants 3GB of memory or 1 x KVR400X64C3AK2/1G if he only needs 2GB of memory or his budget is limited.
  2. ref GA-8IPE775-G - http://www.gigabyte.com/products/product-page.aspx?pid=2174&dl=1#sp

    Type: Dual Channel DDR 400 / 333 / 266 support
    Max capacity: 4 GB (Please read FAQ for further information)
    DIMM slots: 4
    - 4 184-pin DDR DIMM sockets
    - Supports Dual channel DDR400/DDR333/DDR266 DIMM
    - Supports 128MB/256MB/512MB/1GB unbuffered DRAM
    - Supports up to 4GB DRAM (Max)

    Assuming Windows XP then you really want 2GB of RAM minimum.

    Example 2x1GB kits - http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=100007611%20600006040%20600006065%20600006085&IsNodeId=1&bop=And&Order=REVIEWS&PageSize=20
  3. i should of said,i'm putting windows 7 ultimate on it also
  4. Yeah sure if you can find the drivers to support Windows 7 Ultimate is a waste IMO. Either Windows 7 Pro or Home Premium...and then 4GB of RAM (4x1GB).
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