which memory for Asus P5k mobo?

hope this isnt a big bother but if somone can confirm which is the right/best 2x 2gb 6400 Corsair Memory for the Asus P5k-E wifi AP mobo
there's 3 choices at scan:

Twin2X4096-6400C4DHX (4-4-4-12 lowest latency so best?) £93
Computer hardware and software at amazing prices, available online from Scan Computers UK

Twin2X4096-6400C5DHX (5-5-5-18) £70
Computer hardware and software at amazing prices, available online from Scan Computers UK

Twin2X4096-6400C5 G (5-5-5-18) £67
Computer hardware and software at amazing prices, available online from Scan Computers UK


they're all listed on Corsair's website as compatible except the last one has an extra 'G'
(2gb sticks not mentioned on asus website/manual that I can find)

never built before so don't want to take any chances, thanks

I'd go for the middle lot. I doubt you'd see any real difference for the money with the low latency stuff but £3's not much to pay for those shiny heat sinks.

All of them will work fine with that board. If I were you I would be buying the set; Twin2X4096-6400C5DHX (5-5-5-18) £70

Thankkyou both that puts my mind at ease