Basic info about the Intel DG1 core

Intel's first attempt at a dedicated graphics card was the Intel740, released in February 1998. The Intel740 was considered unsuccessful due its performance and market expectations and Intel ceased development on future discrete graphics products. However, its technology lived on in the Intel Extreme Graphics lineup. Intel made another attempt with the Larrabee architecture before cancelling it in 2009;[9] this time, the technology developed was used in the Xeon Phi, which was discontinued in 2020.
The first functional discrete "Xe" GPU, codenamed "DG1", was reported as having begun testing in October 2019.

Intel Iris Xe Max (DG1)
In August 2020, Intel was reported to be shipping Xe DG1 GPUs for a possible late 2020 release, while also commenting on a DG2 GPU aimed at the enthusiast market. The DG1 is also sold as the Iris Xe MAX and as Iris Xe Graphics (stylized as iRIS Xe) in laptops, while cards for developers are sold as the DG1 SDV.
The Xe MAX is an entry-level GPU that was first released on November 1, 2020 in China and is similar in most aspects to the integrated GPU found in Tiger Lake processors, the only differences being a higher clock speed, slightly higher performance and dedicated memory and a dedicated TDP requirement. It competes with Nvidia's laptop-level GeForce MX series GPUs. It is aimed at slim and highly portable productivity laptops and has 4GB of dedicated LPDDR4X-4266 memory with a 128-bit wide memory bus, has 96 EUs, 48 texture units, 24 ROPs, a peak clock speed of 1650 MHz and a performance of 2.46 FP32 teraFLOPs with a 25w TDP. By comparison, the integrated GPU in Tiger Lake processors has a performance of 2.1 FP32 teraFLOPs. The Xe MAX does not replace the system's integrated GPU; instead it was designed to work alongside it, so tasks are split between the integrated and discrete GPUs. It is initially available on only 3 laptops: The Asus VivoBook Flip 14 TP470, the Acer Swift 3X, and the Dell Inspiron 15 7000. Intel Xe MAX GPUs can only be found on systems with Tiger Lake processors.
Desktop versions of the Xe MAX were expected to be released in early 2021 exclusively to OEMs for use in low-cost desktop computers. Such computers are expected to have graphics that are better than those offered by integrated GPUs while saving on costs and allowing OEMs to advertise the dedicated GPU in such systems.

Recomended Link: Intel DG1 on WiKi pages