What DDR400 to buy: Geil VALUE or Kingmax tinyBGA?

Do you already have 1 module? You should try to ahve two of them to run in dual channel, a little 3-5% but still ebtter than nothing!

Geil is good stuff I dont knwo about Kingmax.

Try to find some OCZ value VX this is good stuff, otherwise just stick with known manufacturer.

Asus P4P800DX, P4C 2.6ghz@3.25ghz, 2X512 OCZ PC4000 3-4-4-8, MSI 6800Ultra stock, 2X30gig Raid0

No, I will buy a new computer tomorrow. Maybe I will get another 512MB module later to work in dual channel.
So Geil is "good stuff" even if it's the VALUE series?

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There's no place like 127.0.0.1!

Yup no personnal experience but since it has lifetime warranty I wouldnt worry!
Cas2.5 is a bit hgih but for the price thats what you get =)

Asus P4P800DX, P4C 2.6ghz@3.25ghz, 2X512 OCZ PC4000 3-4-4-8, MSI 6800Ultra stock, 2X30gig Raid0