Intel has announced that it had discontinued its Xeon Phi 7200-series coprocessor cards codenamed Knights Landing: the products in question are the Xeon Phi 7220A, 7220P and 7240P coprocessors, which were used for software development by various close partners of Intel, but were never released as commercial products.
Intel did not provide an exact reason for why it decided not to make the Xeon Phi 7200-series cards available for the mass market. But here is some food for thought. Compute performance of the Xeon Phi 7220A, 7220P and 7240P PCIe coprocessors is slightly under 3 TFLOPS FP64, which is below 3 – 3.4 TFLOPS offered by numerous Xeon Phi LGA processors. Furthermore, the coprocessor cards by their very nature have much more limited I/O options than their socketed counterparts, relying on a single PCIe x16 link back to the host, versus a socketed processor having 36 PCIe lanes of its own to directly attach to peripherals.
Discussion
Source: [H]ardOCP – Intel Discontinues Xeon Phi 7200-Series “Knights Landing” Coprocessor Cards