There's already a few benchmarks that are directly relevant, take a look at the FFTW performance, for instance [1] (sourced from [2]), which consists mostly of

There's already a few benchmarks that are directly relevant, take a look at the FFTW performance, for instance [1] (sourced from [2]), which consists mostly of single precision AVX instructions. The 1800X is handily beaten even by a deliberately downclocked 7700k, which costs a bit over half the price. But that's only half the story. The thing is, a decent 7700k (after fixing the thermal interface via delidding and using high end air or low to mid end water cooling) is actually capable of running at 4.8-5 Ghz without downclocking for AVX. You might get an unlucky sample and only do 4.6 Ghz, but it's still cost effective. A 6900k, on the other hand, doesn't have the thermal headroom to go much past its stock frequencies on AVX-heavy workloads, unless you go full crazy with sub-ambient cooling. So, in the end, it looks like the 7700k has at least double the price/performance ratio of a 1800X in AVX-heavy workloads along with vastly superior single thread performance. It looks to me like Ryzen is a great leap in price/performance only insofar as your workloads are highly multithreaded, yet don't make much use of vectorization at all. [1] http://media.bestofmicro.com/ext/aHR0cDovL21lZGlhLmJlc3RvZm1pY3JvLmNvbS8zL0QvNjU3MTkzL29yaWdpbmFsLzAxLUZGVFctMUQucG5n/r_600x450.png http://media.bestofmicro.com/ext/aHR0cDovL21lZGlhLmJlc3RvZm1... [2] http://www.tomshardware.com/reviews/amd-ryzen-7-1800x-cpu,4951-10.html http://www.tomshardware.com/reviews/amd-ryzen-7-1800x-cpu,49...