Memory Subsystem Performance: Synthetic Benchmarks
First of all we used some diagnostic utilities that help measure the practical latency and memory subsystem bandwidth.
According to Sandra 2007, the memory subsystem on Nvidia nForce 680i SLI based platform works faster than that on iP965 based one, but slower than on i975X based one. So, it turns out that the DASP 4.0 and 1T Command Rate do not guarantee high performance of the memory subsystem. ASUS engineers managed to squeeze much higher speeds out of the Intel 975X core logic.
However, we shouldn’t forget that the algorithms used in the chipset memory controllers depends on the data usage model selected by the running application. For example, the results in Everest 2006 differ from the results of Sandra 2007. According to this test, even though i975X provides the best latency, Nvidia nForce 680i SLI chipset is not any slower from the practical bandwidth standpoint.