ASUS has really embraced the Intel P35 quickly, as they currently offer
eight unique motherboards based on the chipset. The ASUS P5K Deluxe comes in
two flavors, while the standard version we have here today supports DDR2
memory, there is also a version that exclusively supports DDR3 memory, known
as the P5K3 Deluxe. Both motherboards share the exact same PCB design with
slight alterations to the cooling design and of course different memory
DIMMs. Today we are testing the P5K Deluxe WiFi-AP Edition, which currently
has a retail value of $250, making this a high-end product.

http://www.techspot.com/review/56-asus-p5k-deluxe-wifi/