A-Tech 64GB (8x8GB) DDR3 1066 PC3-8500R ECC RDIMM 4Rx8 1.5V 240-Pin Server RAM

64GB DDR3 1066 ECC RDIMM Kit

This 64GB kit contains eight 8GB DDR3 1066 modules built to the PC3-8500 standard. Each stick is a registered ECC DIMM with a 4Rx8 quad-rank layout and operates at the standard 1.5V. The memory is designed exclusively for servers and workstations that require registered DDR3 DIMMs.

Registered DDR3 limits desktop use

Registered DIMMs place a register between the memory controller and the DRAM chips, which reduces electrical load on the server memory bus. This buffering means the modules will not function in standard desktop or laptop platforms that expect unbuffered memory. Compatibility is restricted to systems whose documentation explicitly lists DDR3 RDIMM support.

4Rx8 quad-rank density per module

Each 8GB module uses a 4Rx8 organisation, presenting four logical ranks to the memory controller. Servers have a finite number of rank slots per channel, so the total number of quad-rank DIMMs that can be installed is capped by the platform specification. Verify the maximum supported ranks per channel before configuring all eight modules.