Legit Reviews posted a review on the Intel Core i7-6950X Broadwell-E Benchmarks Leaked
A quote from the article:
The Intel Core i7-6950X processor is rumored to be a 10-core processor with 25MB of shared L3 cache. It has a 140W TDP and is compatiable with Intel X99 motherbaords (LGA 2011-3) that have the proper UEFI microcode support. In his first run of the Intel Core i7-6950X he got 151 points single-core and 1,904 multi-core in Cinebench R15. He also ran an Intel Core i7-5960X at the same speeds on the same ASUS RVE motherboard and got 160 points single-core and 1,592 in the multi-core test. Besides using an older architecture, the Intel Core i7-5960X has just 8-cores and 20MB of L3 cache, so we expected it perform slower in the multi-threaded benchmark test and have no answer as to why it was slower in the single-core test as both processors were said to be run at the same clock speeds.Intel Core i7-6950X Broadwell-E Benchmarks Leaked @ Legit Reviews
Other performance numbers shown included the Intel XTU benchmark (2,354 points) and some AIDA64 benchmarks.