This PN is for x4540 using single rank Memory. Sun Fire X4540 server, 2x AMD Opteron Model quad-core 2356, 2.3GHz Processor,16x2GB Mem, 48 SATA 3.5 500GB, 7200RPM HDD, 2x PSU, Service Processor, 4x 10/100/1000 Ethernet ports, 4x USB 2.0 ports, 3x PCI-E sl
