The CPU and integrated chipset was updated to Kaby Lake-U. A minor update to the P50, which included the updated CM238 chipset. A minor update to the P70 including the updated CM238 chipset. ! rowspan="2" | P51 ! colspan="10" |17.3" ! rowspan="2" |P71 NVIDIAQuadroM620 (2 GB GDDR5), M2200 (4 GB GDDR5), P3000 (6 GB GDDR5), P4000 (8 GB GDDR5), orP5000(16 GBGDDR5)  The ThinkPad P1 was based on the first generation of ThinkPad X1 Extreme. It features Intel Xeon CPUs and Nvidia Quadro graphics. Based on the ThinkPad T580, the P52s features a camera shutter, lateral instead of bottom-mounted docking port, and quad-core Ultrabook CPUs. The P52s includes quad-core Kaby Lake-R 15W CPUs and Nvidia Quadro P500 GPUs. The P52 was an update to the P51 which introduced Coffee Lake CPUs, all with 6 cores and 12 threads, the CM246 chipset, and Nvidia Pascal GPUs. It removed the mechanical docking port and ExpressCard slot, and features a narrower keyboard which is present on other ThinkPads  The P72 was a redesign of the P71 with hardware upgrades similar to those of the P52. It also features the narrower keyboard of the P52; the first 17" ThinkPad with a soldered GPU.