Performance - CPU-Z
CPU-Z Benchmark
CPU-Z offers a pretty nice performance measurement to test RAW CPU performance, performance is measured both as single-core and multi-threaded core performance. It offers a fast and easy manner in which to quickly view single-threaded and multi-threaded SMT performance. Give it a try yourself, it is easy to use. Here are some numbers, we'll build up and update more results over time.
And yes, we ran this test several times. ST was slightly faster with slower memory.