I thought 3dmark06 ran the first one single threaded and the second one multi-threaded. Both being CPU only.
edit this is what 3dsmark06 site says:
CPU Tests - Red Valley (requires full SM2.0 support or better)
Both CPU tests use our new game engine, and rely on AI, physics and game logic to generate a multi-threaded workload that can be distributed on multiple processors, cores or even on a single processor. Ageia PhysX library and D* Lite path finding AI algorithm are produce demanding CPU loads. Tests are run in a fixed frame rate of 2FPS for more equal CPU loading. Resolution is locked to 640x480 to decrease GFX influence of performance. The shader profile is locked to 2_0 and no dynamic shadows are used. The D* Lite AI algorithm generates unit path requests in a dynamic path finding grid, where each unit represents a moving obstacle, and paths sync back at 200ms-600ms intervals. The complexity of the path request fulfillment varies; the dynamic re-planning algorithm can re-use the state of previous searches. The Ageia physics uses 87 units and their rigid bodies at 20ms physics steps. Professional reviewers can disable a second CPU or other core of either a virtual or physical dual core system for comparable results regardless of the number of cores or CPUs.
CPU Test 1
The test uses a high level of path finding complexity, tight AI synchronization intervals over 40 frames, locked to fixed frame rate of 2FPS with a Shader Profile of 2_0 and a resolution of 640x480.
CPU Test 2
The test uses a lower level of path finding complexity, lax AI synchronization intervals over 60 frames, locked to a fixed frame rate of 2FPS with a Shader Profile of 2_0 and a resolution of 640x480.
http://www.futuremark.com/products/3dmark06/tests/
So they are both CPu benchmarks and both are SMP enabled.