On the ECS PN2 SLI+ motherboard there is at least two slots of space for each PCI Express x16 videocard (for SLI). The blue PCI Express x16 slot actually only runs at PCI Express x8, and is intended for super high bandwidth peripherals, nVIDIA's upcoming physics accelerator or perhaps a third videocard. The two black PCIe slots each receive 16 lanes each when running in SLI.
The bottom right hand corner of the ECS PN2 SLI2+ has the two USB2.0 headers, front panel IO connections, a Port 80 card, and the fifth and sixth Serial ATA II and floppy connectors oriented at 90 degrees. The yellow header at the bottom half of the screen is a serial port connector port.
The four DDR2 memory slots are colour coordinated in a way that tells the user which memory slots to populate to enable dual channel memory support. To the right of the memory slots are the first four Serial ATA II channels, an IDE port, the main 24 pin ATX power connector and the auxiliary power connector. The jumpers tucked in next to that aux. power port is the front panel audio connector. It's a pretty horrible location for tiny pins to go.
The ECS PN2 SLI+ motherboard supports Intel socket 775 processors running on an FSB as high as 1333MHz. If you install a watercooling thermal solution, you'll need to add the small fan onto the Northbridge heatsink. The VRMs around the CPU socket are all capped with passive aluminum heatsinks that work of exhaust airflow. Note the 8-pin power connector tucked into the far right corner; again this is a pretty tight fit and not particularly user friendly.
There are illuminated power and reset buttons on the ECS PN2 SLI+ motherboard. Situated under the last PCI slot is not ideal for all situations... particularly if this slot is populated with a card. Outside of the case, these buttons are great for enthusiasts who likes to tweak their computer on a desk first.
With the drive ports at the edge of the PCB, at right angles in some cases, hooking up optical drives and SATA hard drives is quick and cabling centralized.