The latest SiSoft Sandra database entries reveal that the Tiger Lake-U Xe iGPUs appear to be on par with the DG1 discrete GPUs releasing later this year. This means the iGPU is getting the same 96 execution units with 768 shading units, plus high core clocks of 1.3 GHz. Despite all these impressive specs, the benchmark scores are quite the disappointment.
https://www.notebookcheck.net/Intel-s-Tiger-Lake-U-Iris-Xe-iGPU-gets-beefy-specs-but-disappoints-in-latest-SiSoft-Sandra-benchmarks.481243.0.html