Intel Core i7-4578U vs Intel Core i5-8210Y

Intel Core i7-4578U

Intel Core i5-8210Y

The Intel Core i5-8210Y is a very efficient dual-core SoC for (passively) cooled notebooks based on the Amber Lake generation and was announced on 30th October 2018 with the new MacBook Air. The CPU consists of two processor cores clocked at 1.6 - 3.6 GHz and a TDP of 7 Watt. Thanks to Hyper Threading, the processor can execute up to four threads simultaneously. The chips also includes the Intel HD Graphics 617 GPU, a dual-channel memory controller (DDR3L/LPDDR3) as well as VP9 and H.265 video de- and encoder. Compared to the Kaby Lake-Y predecessors (e.g. Core i7-7Y75), Amber Lake uses the same architecture produced in the improved 14nm+ FinFET process (no 14nm++) but offers higher clock speeds at an increased TDP rating. The Core i5-8200Y is very similar when configured to 7 Watt (cTDP up) and offers even higher Turbo clocks, but a slightly slower GPU (-100 MHz).

Architecture

Intel basically used the familiar micro architecture from the Skylake / Kaby Lake generation, so the per-MHz performance is identical.

Performance

The performance of the Y series is highly depending on the cooling solution of the laptop / tablet and the TDP settings for sustained load. Therefore, the differences between a Core m3 and a i7 may be rather slim, if the thermals are very limited. The high Turbo clock speeds in Amber Lake should however lead to a very good single thread performance for short bursts.

Graphics

The integrated Intel HD Graphics 617 GPU has 24 Execution Units (EUs) like the old HD Graphics 515 and runs with clocks between 300 and 1050 MHz in combination with this processor. The performance heavily depends on the TDP limit as well as the memory configuration; with fast LPDDR3-1866 RAM in dual-channel mode, the GPU should sometimes be able to compete with the HD Graphics 520, but can also be much slower in other scenarios. Modern games from 2016 will, if at all, only run smoothly in the lowest settings.

Contrary to Skylake, Kaby Lake and Amber Lake now also supports hardware decoding for H.265/HEVC Main10 with a 10-bit color depth as well as Google's VP9 codec.

Power Consumption

The chip is manufactured in the 14 nm+ process with FinFET transistors. The typical TDP for the Amber Lake Y-series is specified at 5 Watts, but the i5-8210Y is specified at 7 Watt (for the MacBook Air).