Quote Originally Posted by msgclb View Post
Crucial doesn't show it as one of there 40 compatible memory upgrades for either of these ASUS P5K motherboards:
ASUS P5K Deluxe/WiFi-AP Motherboard
http://www.crucial.com/store/listpar...e%2FWiFi%2DAP#
If there 2GB DDR2-1067 kit does then why wouldn't there 2GB DDR2-800 kit work?
I've noticed that about a month ago they've stopped recommending PC2-6400 modules by default. You need to select this speed manually.

Open that URL, then in the left-hand side column called "Refine my choices"
select [v] SpeedDR2 PC2-6400/DDRII-800

Viola! BL2KIT12864AA804 DDR2 PC2-6400 • 4-4-4-12 • UNBUFFERED • NON-ECC • DDR2-800 • 2.2V • SLI-Ready • 128Meg x 64
Is there and available.