MSI GTX 660 Gaming Video Card Review

There are six tests in 3DMark 11. The four graphics tests use advanced rendering techniques to compile the scene including tessellation, volumetric lighting, depth of field and post processing effects. The physics test uses rigid body simulation to stress the CPU while the combined test features CPU and GPU workloads. The CPU handles rigid-body physics while the GPU is tasked with volumetric lighting, tessellation, post processing as well as simulating soft-body physics using DirectCompute.

Benchmark Settings
Performance Settings - Benchmarks Only

Similar results as seen with Firestrike Extreme.  GIven that they are both DX11 benchmarks there is very little to question.