Intel’s HD Graphics 620 is a direct successor to the integrated HD Graphics 520. The latter is found in ULV (ultra-low voltage) processors from the 6th Generation (Skylake) of chips while the former is in the 7th (Kaby Lake) generation of CPUs.
Intel’s HD Graphics 620 uses the GT2 version of the graphics chip with 24 EUs (Execution Units) reaching as high as 1050 MHz and it has a base frequency of 300 MHz. However, the maximum operating frequency depends on the CPU, whether it’s the Core i3-7100U or the Core i5-7200U or the Core i7-7500U. Since the iGPU doesn’t have a dedicated memory – or eDRAM for that matter – it uses the available RAM on the system which is 2x 64-bit DDR3 or DDR4.
The TDP depends on the CPU model but it’s usually equipped with a SoC rated at 15W including the memory controller. Its performance should be enough for multimedia activities, light applications and gaming on really low resolution and minimum graphics settings.
You can find all available laptops with Intel HD Graphics 620 here: