A reported benchmark comparing Spatial Multithreading (SMT) enabled and disabled on two NVIDIA Vera CPUs found about 20% more performance on workloads suited to SMT. Average CPU power across the two CPUs rose from about 699 W to 739 W, and results varied by workload.

What the Vera benchmark tested

The benchmark compared the same two-CPU NVIDIA Vera configuration in two states: with SMT enabled and with it disabled. The roughly 20% performance increase applied to workloads that benefited from SMT in the test.

Average CPU power in each SMT state

Average CPU power across both Vera CPUs was about 699 W with SMT disabled and about 739 W with SMT enabled.

SMT stateAverage CPU power across both CPUs
DisabledAbout 699 W
EnabledAbout 739 W

Workload-specific results

The performance change depended on the workload. OpenFOAM performed better with SMT disabled in the reported results.