The engineering sample, listed only under the "ZD2600BBM68AF_38/34_Y" codename in the Geekbench database, is a six core part with enabled SMT for twelve threads and 3.4GHz base and 3.8GHz Turbo clocks. This is a 200MHz increase in clock compared to the Ryzen 5 1600.
The benchmark results however are quite interesting as both single-thread and multi-thread scores are even higher than the clock increase, suggesting that AMD managed to squeeze some IPC improvements from the 12nm Zen+ architecture, or that the new Precision Boost 2 technology, which was one of the new features announced with 2nd generation Ryzen CPUs, is pretty impressive.
With the launch of Raven Ridge APUs, AMD's Robert Hallock revealed that the Pinnacle Ridge CPUs will come with soldered IHS. Bear in mind that the same Ryzen 2600 CPU was spotted earlier in SiSoft Sandra database, running at the same 3.4GHz base clock, so could easily be the final clock of the CPU.
AMD has already announced that the 2nd generation Ryzen CPUs will launch in April 2018.