IBM System x3755 M3

2U chassis
Up to four 8-core or 12-core AMD Opteron 6000 Series processors
Up to 256 GB high-performance, new-generation DDR-3 memory with 32 DIMM slots and up to 1333 MHz memory access speed
Internal storage flexibility with support for up to eight 3.5"; hot-swap SAS/SATA hard disk drives, for up to 16 TB of local storage capacity
4 PCIe slots
Optional VMware ESXi 4.1 embedded hypervisor