The Epox 9NPA+ SLI supports any current and future socket 939 AMD Athlon64 processor and is based on the Nvidia nForce4 SLI chipset with support for up to 4GB of PC3200 DDR memory. The Epox EP-9NPA+SLI motherboard adds on to this capability with an on board PCI Express-based Silicon Image SiI3132 Serial ATA II controller. The SIS SiI3132 supports two additional Serial ATA II channels, and thanks to port multiplier capabilities it can accommodate up to 30 SATA HDDs (fifteen on each port) with an appropriate port-multiplier device.