Why?? How about this??

以下引自S754 functional data sheet(鵝手邊沒有AM2的)....

2.4.2 Memory Controller
The processor’s memory controller provides a programmable interface to a variety of standard DDR SDRAM DIMM configurations. The following features are supported:
• Self-Refresh mode
• Unbuffered and registered DIMMs with a 64-bit data bus with optional 8 bits of Error Correcting Code (ECC) in one of the following two configurations:
— Up to three unbuffered DIMMs according to the loading described in the BIOS and Kernel Developer’s Guide for the AMD Athlon™ 64 and AMD Opteron™ Processors, order# 26094.
— Up to four registered DIMMs

snipped....

• DIMM sizes from 32 Mbytes (using 64Mb x16 DRAMs) to 4Gbyte(using a stacked, registered DIMM with 1Gb x4 DRAMs).

snipped....

照字面上看來光S754就support 4條4GB ECC Registered DDR共16GB了(如果不計血本的話 ),沒有道理更高階者反而倒退吧....