Intel Core i5-8350U vs Intel Core i7-8500Y vs Intel Pentium Gold 6500Y

Intel Core i5-8350U

The Intel Core i5-8350U is a power efficient quad-core SoC for notebooks and Ultrabooks based on the Kaby Lake Refresh generation and was announced in August 2017. Contrary to its direct predecessor the Core i5-7300U, which were still dual-cores, the i7-8350U is equipped with four cores but at a lower base frequency of 1.7 GHz. The Turbo Boost can go up to 3,6 GHz and therefore also offer good short term single core speeds. The GPU is now named Intel UHD Graphics 620 but otherwise identical to the Intel HD Graphics 620. The integrated memory controller supports DDR4-2400 / LPDDR3-2133 and dual channel memory.

Architecture

Intel basically uses the same micro architecture compared to Skylake, so the per-MHz performance does not differ. The manufacturer only reworked the Speed Shift technology for faster dynamic adjustments of voltages and clocks, and the improved 14nm process allows much higher frequencies combined with better efficiency than before.

Performance

According to Intel, the new quad core models are up to 40% faster than their dual core predecessors. Due to the reduced TDP and the same 14nm+ process, the long term performance and throttling behaviour will be interesting and depending on the laptop design. Therefore, the older 35 Watt quad-core models should be faster in applications that demand longer CPU loads.

Graphics

The integrated Intel UHD Graphics 620 (Intel Gen 9.5) is untouched from the 8th Gen Kaby Lake chips. With fast dual-channel memory it can reach the performance of a dedicated GeForce 920M.

Contrary to Skylake, Kaby lake now also supports H.265/HEVC Main 10 with a 10-bit color depth as well as Google's VP9 codec. The dual-core Kaby Lake processors announced in January should also support HDCP 2.2.

Power Consumption

The chip is manufactured in an improved 14nm process with FinFET transistors (14nm+), the same as the 7th Gen Kaby Lake processors. Intel still specifies the TDP with 15 Watts, which is typical for ULV chips. Depending on the usage scenario, the TDP can vary between 7.5 (cTDP Down) and 25 Watts.

Intel Core i7-8500Y

The Intel Core i7-8500Y is a very efficient dual-core SoC for tablets and passively cooled notebooks based on the Amber Lake generation and will be announced around August 2018. It is the fastest Amber Lake-Y CPU at the time of announcement and consists of two processor cores clocked at 1.5 - 4.2 GHz. Thanks to Hyper Threading, the processor can execute up to four threads simultaneously. The chips also includes the Intel HD Graphics 615 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.

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 615 GPU has 24 Execution Units (EUs) like the old HD Graphics 515 and runs with clocks between 300 and 950 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 second generation 14 nm+ process with FinFET transistors. The typical TDP for the Amber Lake Y-series is specified at 5 Watts (previous generations were 4.5 Watt), and can be adjusted in both directions depending on the usage scenario.

Intel Pentium Gold 6500Y

The Intel Pentium Gold 6500Y is an energy-efficient, dual-core SoC designed for use in Windows tablets and passively cooled laptops. The Pentium is based on the old Amber Lake architecture that was initially introduced in 2018. The CPU was unveiled in Q1 2021; it is, in fact, not very different from Intel Core m3-8100Y, the only difference between the two being the slightly slower iGPU model (23 EU UHD Graphics 615 vs 24 EU UHD Graphics 615).

The two CPU cores run at 1.1 GHz to 3.4 GHz and are Hyper-Threading-enabled for 4 processing threads in total.

Architecture

Amber Lake family products are not known to have many improvements compared to the previous Kaby Lake and Skylake processors. They all share nearly the same per-MHz performance and nearly the same set of capabilities. Amber Lake processors do, however, have slightly higher clock speeds in comparison to their immediate predecessors.

Pentium 6500Y has a built-in dual-channel DDR3L-1600/LPDDR3-1866 memory controller as well as several PCI-Express 3.0 lanes for connecting graphics cards, SSDs and other devices. Four PCI-Express 3.0 lanes allow for read/write rates of up to 3.9 GB/s, provided a suitably fast NVMe SSD is used.

Please note this is not a user-replaceable CPU. It is supposed to get soldered permanently on to the motherboard (BGA1515 socket interface).

Performance

While we have not tested a single system built around the 6500Y as of August 2023, we have tested at least one laptop featuring the Core i3-10100Y, a chip that's just a little faster (Amber Lake, 2 cores, 4 threads, up to 3.9 GHz). Based on that, we expect the 6500Y to trail behind the AMD 3020e and the AMD 3050e just slightly. In other words, this is a very slow chip, as of mid 2023.

Graphics

The Intel UHD Graphics 615 normally has 24 Execution Units at its disposal but, for reason unbeknownst to us, just 23 EUs are active in the case of this Pentium. The graphics adapter is not much different from the HD Graphics 615 as found in 7th Gen Y-class Intel Core processors. As such, it has no support for SUHD 4320p monitors, nor can it HW-decode AV1, the latest video codec. Just the more usual VP9, AVC and HEVC are supported.

The UHD Graphics runs at 300 MHz to 900 MHz. This is not a GPU that a gamer would be happy with; very poor 3D performance is to be expected because of the thermal constraints (both Core m3-8100Y and Pentium 6500Y were created with thin tablets and ultra-thin laptops in mind) as well as the rather low TDP of the SoC. Most games will not be playable even if set to Lowest quality preset at 720p resolution. The least graphically intensive titles, like Farming Simulator 19, will pose no problem for the iGPU, though.

Power consumption

The chip is manufactured on one of the old 14 nm Intel processes for fairly unimpressive, as of late 2022, energy efficiency.

The Pentium 6500Y has a default TDP of 5 W (also known as the long-term power limit), half a watt higher than its immediate predecessors; despite the difference, a value this low makes the Pentium more than suitable for use in ultra-thin, passively cooled laptops, tablets, mini-PCs. The default TDP can be reduced slightly (with 3.5 W being the lowest Intel-recommended value) or increased (up to 7 W are possible) by laptop makers if needed, with clock speeds and performance changing accordingly as a result.