AMD has unveiled a new memory controller system which it claims will double the memory capacity on its high-end server and workstation systems. The G3MX technology will target memory intensive systems such as virtualisation servers and large databases when it becomes available in 2009. In conventional systems, Ram modules connect directly to a memory controller on the motherboard or are built into the CPU.
In larger systems requiring more memory, a buffer must be used between the memory module and the controller to avoid a decrease in performance. The current choice for this is fully-buffered Ram modules which contain a built-in buffer. But the problem with fully buffered Ram is that it is expensive and power-hungry, and hampers performance, explained Nathan Brookwood, principal analyst at Insight64. "Fully buffered Dims were thought to be a big thing, and they turned out not to be," Brookwood told vnunet.com. "Every memory chip paid a price in terms of latency."