The new X4 from IBM will replace the current X3 and will scale up to 32 processors across eight system boards for 128 cores in a single server system. The chipset will support up sixteen 1GB, 2GB and 4GB memory modules per system board, providing a maximum of 512GB of memory.
InfiniBand for supercomputing cluster use won't be supported but there will be dual Gigabit Ethernet ports and 10 Gigabit Ethernet as an option.