While most users of the AMD Opteron processors with ATI FireGL graphics will not be tasking their systems for gaming, we had run the Nexuiz test at 2560 x 1600 with HDR as a sample of what to expect. A single AMD Opteron 2384 was faster than one AMD Opteron 2356 by about 30%. Besides the greater L3 cache and fundamental differences between the Shanghai and Barcelona, the Opteron 2384 does have a 400MHz advantage over the 2356.
At SPECViewPerf 9.0 there was also nearly a 30% advantage with the Shanghai processor, but not any additional boost when using two Opteron 2384 processors. SPECViewPerf 10.0, which is more multi-threaded friendly, wasn't used in this article due to bugs within the Linux/UNIX version.
The eight-cores of Shanghai began to shine when using the OpenMP-powered GraphicsMagick test. With the HWB Color Space test, a single Shanghai CPU was faster than the Barcelona when in the single and dual CPU configurations. The Opteron 2384 was about 33% faster than the Opteron 2356, and when slapping in a second Shanghai CPU, the system was able to sustain about 15% more iterations per minute.