TechPowerUp came across rumors that Intel's Ice Lake may offer an increase in IPC of up to 40 percent in the best-case scenario, and about 18 percent on average. These comparisons are made versus Skylake, as this is still the base architecture used by Intel's current generation.
A Chinese tech-forum member with access to an "Ice Lake" 6-core/12-thread sample put the chip through the CPU-Z internal benchmark (test module version 17.01). At a clock-speed of 3.60 GHz, the "Ice Lake" chip allegedly achieved a single-core score of 635 points. To put this number into perspective, a Ryzen 7 3800X "Matisse" supposedly needs to run at 4.70 GHz to match this score, and a Core i7-7700K "Kaby Lake" needs to run at 5.20 GHz. Desktop "Ice Lake" processors are unlikely to launch in 2019.
The first mobile Ice Lake CPUs are expected in Q4 2019, but it's unknown when we can expect desktop variants. According to some earlier rumors, there may be no high-end 10nm desktop chips from Intel until 2022.