AMD Phenom II X4 940 BE Review
By Vince Freeman :
January 9, 2009
SiSoft SANDRA 2009 Bandwidth Performance
SiSoft SANDRA 2009 is a very popular system benchmark, and each revision sticks to its roots and supplies a wide range of individual benchmarks and system utilities. These tests include processor, system, network, and hard drive benchmarks, along with many other performance metrics. The memory bandwidth test is the most popular section of the SiSoft SANDRA benchmark suite, and it highlights the potential performance levels of the CPU-memory subsystem. As the Integer and FPU memory bandwidth scores are quite similar, we are only including the first one in our benchmark testing.
The memory bandwidth test in SANDRA 2009 is the first entirely memory-specific benchmark so far, and it will be interesting to see how the larger L3 cache affects memory performance, as well as the impact of higher clock speeds. The Phenom II X4 demonstrates a slight advantage over the Phenom X4 in this test, but still nothing that drastic. It also easily outperforms the Core 2 contingent, while not coming even close to the two Core i7 processors.
The SiSoft SANDRA 2009 Cache & Memory benchmark goes well beyond memory performance, and measures the bandwidth of the combined processor cache and memory subsystem. This test can show off the architectural advantages of each processor, as well as the benefits of larger and faster L1/L2 data caches, and help give us an overall view of how the processor and memory match up in high-speed data transfers.
This test was not a good one for the Phenom X4 and it's not that great for the updated Phenom II X4 940 either. Granted, the newer architecture is noticeably faster, but AMD remains well behind that performance offered by a 3.0 GHz Core 2 Extreme QX6850.
SiSoft SANDRA 2009 incorporates a multi-core benchmark that tests the inter-core bandwidth, processor affinity and speed of today's top-end CPUs. This measures the efficiency of the inter-connect bandwidth, and determines overall bandwidth available between processors.
Through multiple iterations of the SiSoft SANDRA benchmark, AMD Phenom-based processors have had a serious problem with this benchmark, and other than a slight speed jump compared to the Phenom X4 models, there's not much more to say about the performance scores of Phenom II X4.