The best platform combining powerful performance with great energy efficiency - Intel® Core™2 Quad / Core™2 Extreme / Core™2 Duo / Pentium® Extreme / Pentium® D / Pentium® 4 Processors - NVIDIA® 750i SLI chipset - ASUS EPU (Energy Processing Unit)- ASUS Precision Tweaker 2- Support PCIe2.0 Dual x16 SLI- ASUS Q-Shield Shop Modal header The best platform combining powerful performance with great energy efficiencyThe P5N-D is a NVIDIA® 750i SLI chipset-based motherboard that combines powerful performance with great energy efficiency; and supports NVIDIA® SLI technology with PCI Express 2.0 for extreme graphics performance. It also comes with the worlds first ASUS EPU (Energy Processing Unit), allowing the CPU power supply to be digitally monitored and fine-tuned with improved VRM efficiency in heavy or light loadings – attaining the best possible power efficiency and energy savings to help save the environment. CPU and Memory Features LGA775 Intel® Core™2 Processor ReadyThis motherboard supports the latest Intel® Core™2 processors in LGA775 package. It also can support Intel® next generation 45nm Multi-Core CPU. With new Intel® Core™ microarchitecture technology and 1333 / 1066 / 800 MHz FSB, Intel® Core™2 processor is one of the most powerful and energy efficient CPU in the world. PCIe 2.0Double Speed; Double Bandwidth This motherboard supports the latest PCIe 2.0 devices for double speed and bandwidth which enhances system performance. NVIDIA SLI™ TechnologyNVIDIA SLI™ (Scalable Link Interface) takes advantage of the increased bandwidth of the PCI Express bus architecture and features intelligent hardware and software that allows two GPUs to efficiently work together to deliver earth-shattering, scalable performance. For some applications nearly 2X performance! (From www.NVIDIA.com) Dual-Channel DDR2-800DDR2 is the next generation memory technology to replace the current DDR. With the highest speed up to 800MHz,DDR2 memory provides great performance for 3D graphics and other memory demanding applications. ASUS Quiet Thermal Solution ASUS EPUEnables the Most Energy Efficient Motherboard in the WorldThe ASUS EPU utilizes innovative technology to digitally monitor and finetune the CPU power supply with improved VR responses in heavy or light loadings. Working together with AI Gear 3, it automatically provides power for higher performance or improves efficiency by 50% when the PC is running low intensity applications - helping you attain the best possible power efficiency and energy savings of up to 80.23% to help save the environment. EPU Video Fanless DesignProvide a cool environment without all the baggageCooling fans, though a popular thermal solution, also come with noise and malfunction likelyhood. ASUS Motherboard´s fansless concept is specifically created to provide a cool environment without all the baggage. ASUS has devoted special efforts to address the thermal issues across the motherboard, and most notably the areas that reside the CPU, power, VGA, and chipsets. The heat sinks were tailor made to dissipate heat in the most efficient manner. Q-Fan 2 Adjusts both CPU fan and chassis fan speeds according to system loading ASUS Q-Fan2 technology intelligently adjusts both CPU fan and chassis fan speeds according to system loading to ensure quiet, cool and efficient operation. Optional Fan (for Water-Cooling or Passive-Cooling only)Maximize Water-Cooling or Passive-Cooling performance! The optional fan is specifically designed to provide sufficient airflow over the chipset area and CPU power modules when water-cooling or passive-cooling is utilized, ensuring effective heat dissipation for the entire system. Uses 100% All High-quality Conductive Polymer Capacitors!This motherboard uses all high-quality conductive polymer capacitors onboard for durability, improved lifespan, and enhanced thermal capacity. ASUS EZ DIY Q-ShieldEasy and Comfortable InstallationsThe specially designed ASUS Q-Shield does without the usual "fingers" - making it convenient and easy to install. With better electric conductivity, it ideally protects your motherboard against static electricity and shields it against Electronic Magnetic Interference (EMI). AI Direct LinkLightning Fast Data Linkage between Your PC & Laptop AI Direct Link can easily and efficiently transfer large amounts of data via the network cable - saving up to 70% of the total time taken. With AI Direct Link, it becomes easy to backup or share large data files like movies or other media content. Q-Connector Make connection quick and accurate! The ASUS Q-Connector allows you to connect or disconnect chassis front panel cables in one easy step with one complete module. This unique adapter eliminates the trouble of plugging in one cable at a time, making connection quick and accurate. CrashFree BIOS 2 The CrashFree BIOS2 feature now includes the BIOS auto-recovery function in a support CD. Users can reboot their system through the support CD when a bootable disk is not available, and go through the simple BIOS auto-recovery process. ASUS motherboards now enable users to enjoy this protection feature without the need to pay for an optional ROM. O.C. Profile Conveniently store or load multiple BIOS settings Freely share and distribute favorite overclocking settings The motherboard features the ASUS O.C. Profile that allows users to conveniently store or load multiple BIOS settings. The BIOS settings can be stored in the CMOS or a separate file, giving users freedom to share and distribute their favorite overclocking settings. ASUS Overclocking Tools Precision Tweaker 2Super-fine Adjustments to Help Create a Brand New O.C Record!Allows the user to adjust the NB Voltage, SB Voltage, Hyper Transport Voltage and the DRAM Voltage in 0.02v steps to finetune voltages to achieve the most precise setting for the ultimate customized overclocking configuration. C.P.R. (CPU Parameter Recall) Protect your BIOS data when overclocking. When the system hangs due to overclocking failure, there is no need to open the case to clear CMOS data. Just simply restart the system, the BIOS would show the previous setting and then users can amend the CPU setting again. ASUS Special Features MyLogo2 Personalize your system with customizable boot logo You can convert your favorite photo into a 256-color boot logo for a more colorful and vivid image on your screen. Interface Features Gigabit LAN The NVIDIA native Gigabit LAN controller delivers transfer speeds up to ten times faster than conventional 10/100 Ethernet connections. Gigabit LAN is the networking standard for the early future and is ideal for handling large amounts of data such as video, audio, and voice. IEEE 1394a interfaceIEEE 1394a interface provides high speed digital interface for audio/video appliances such as digital television, digital video camcorders, storage peripherals & other PC portable devices. High Definition Audio Enjoy high-end sound system on your PC! The onboard 8-channel HD audio (High Definition Audio, previously codenamed Azalia) CODEC enables high-quality 192KHz/24-bit audio output, jack-sensing feature, retasking functions and multi-streaming technology that simultaneously sends different audio streams to different destinations. You can now talk to your partners on the headphone while playing a multi-channel network games. All of these are done on one computer. Serial ATA 3Gb/s This motherboard incorporates four SATA 3Gb/s ports with high performance RAID functions in RAID 0, 1, 0+1, 5 and JBOD. This is the ideal solution to enhance hard disk performance and data back up protection without the cost of add-on cards. S/PDIF-out on Back I/O PortThis motherboard provides convenient connectivity to external home theater audio systems via coaxial and optical S/PDIF-out (SONY-PHILIPS Digital Interface) jacks. It allows to transfer digital audio without converting to analog format and keeps the best signal quality. GreenASUS The motherboard and its packaging comply with the European Union´s Restriction on the use of Hazardous Substances (RoHS). This is in line with the ASUS vision of creating environment-friendly and recyclable products and packaging to safeguard consumers´ health while minimizing the impact on the environment.