Intel has just launched its new line of Haswell-EX Xeon CPUs, which include up to 36 threads (with the 18-core model), with up to 45MB of L3 cache, depending on the model.
The flagship Xeon E7-8890 V4 processor has 18 cores (36 threads), 45MB of L3 cache (LLC) and clock speeds that float between 2.5GHz and 3.3GHz in AVX workloads, and between 2.1GHz and 3.3GHz normally. This Haswell-EX powered Xeon CPU has a massive 165W TDP, packing some 5.6 billion transistors. All of this results in a wallet-busting price of $7175 or so.
The new Haswell-EX powered Xeon platform can handle up to 24 DIMMs per socket of either DDR3 or DDR4, with a full 8S server rack capable of consuming up to 12TB of DDR4 RAM. These new systems can handle up to 32 sockets, with 8-socket systems capable of taking 12TB of RAM, too.
Intel's Haswell-EX Xeon E7 v3 processors might culminate with the $7175 version in the E7-8890 v3, but it all starts with the 'entry-level' E7-4809 v3 which features 8 cores/16 threads, 2GHz clock speed, and 20MB of LLC cache.