Asus P9D-C/4L - Manual (Page 20)

1-6 Chapter 1: Product introduction
DDR3 memory support
The motherboard supports ECC UDIMM DDR3 memory that features data transfer
rates of 1600/1333 MHz to meet the higher bandwidth requirements of server
and workstation applications. The dual-channel DDR3 architecture boosts system
performance, eliminates bottlenecks with peak bandwidth up to 25Gb/s, and
dramatically reduces the memory voltage to just 1.5V compared to DDR2's memory
voltage of 1.8V.
1.4.2 Innovative ASUS features
ASUS Fan Speed technology
The ASUS Fan Speed technology smartly adjusts the fan speeds according to the
system loading to ensure quiet, cool, and efficient operation.
PIKE (Proprietary I/O Kit Expansion)
PIKE is an on-demand upgrade kit for users. This ASUS unique feature enables
users to choose their preferred I/O solutions. ASUS provides multiple SAS solutions
for different segments and purposes and PIKE saves lots of validation efforts and
hardware cost for end users. Moreover, the special patent design offers multiple I/O
solutions without occupying the Slot 6 in 1U system.
ASUS MIO Audio card
The ASUS MIO audio card is a discrete 8-channel high definition audio (High Definition
Audio previously codenamed Azalia) CODEC that enables the clearest high quality
audio output. It has jack-sensing feature, retasking functions, and multi-streaming
technology that simultaneously send different audio streams to different destinations
for high-end sound quality.