Architecture

The Pentium Gold G5600 is based on Intel's 8th generation "Coffee Lake" micro-architecture. The CPU circuit design is essentially the same as with "Skylake" but the silicon is built on Intel's third iteration of the 14 nanometer silicon fab process, which the company refers to as 14 nm++. This node improves the ability for the chipmaker to dial up clock speeds at minimal power/thermal cost. The G5600 is based on the dual-core+GT2 variant of the silicon, which has two physical CPU cores (no hidden/disabled cores), 4 MB of L3 cache across four blocks, and a Gen 9.5 GT2 graphics core with 24 execution units, commercially labeled "Intel UHD Graphics 630". The "Coffee Lake" dual-core silicon measures roughly 100 mm², physically features two CPU cores with 256 KB of dedicated L2 cache per core, and 4 MB of shared L3 cache, or 2 MB per core. The Celeron SKUs based on this silicon have 1.5 MB per core (3 MB shared L3 cache).



The system agent (integrated Northbridge) also appears to be carried over from the "Kaby Lake" die, with its dual-channel DDR4 memory interface. The processor now natively supports DDR4-2400 (JEDEC). It puts out 16 PCI-Express gen 3.0 lanes meant for PEG (PCI-Express discrete graphics). It talks to the motherboard chipset over the DMI 3.0 chipset bus with a 32 Gbps-per-direction bandwidth.



The "Coffee Lake" CPU core is of the same exact design as Skylake and Kaby Lake, which dates back to 2015. Compared to the Haswell/Broadwell core, it features an improved front-end with a 25% fatter 5 µOP pipeline, a 50% wider allocation queue depth, an improved branch-prediction unit, and a wider instruction window. The execution stage features a slightly bigger re-order buffer, a bigger integer register file, and an improved on-chip memory system. All of these contribute to a 5-10 percent IPC increase over "Haswell" to "Skylake" clock-for-clock.



Between "Skylake" and "Coffee Lake," Intel turned its R&D efforts toward refining the 14 nm process. It met with success on "Kaby Lake," and owing to its significantly higher clock speeds, "Kaby Lake" was able to provide higher performance than "Skylake." With "Coffee Lake," the nominal clock speeds look low, but Turbo Boost frequencies are higher than with "Kaby Lake," and refinements in the process allow the chip to sustain elevated boost-clock states better. As we mentioned throughout the introduction, the design focus of these chips is to increase core counts across the board in order to better compete with AMD Ryzen.

The Gen 9.5 integrated graphics core takes up nearly a third of the die area. Since it's of the same core configuration as the one on the "Kaby Lake" silicon, it still features 24 execution units in the GT2 trim (featured on the i7-8700K). Higher clocks and some driver magic let Intel brand it "UHD Graphics." Don't expect to play PUBG at 4K on this; the "UHD" moniker only indicates that the IGP can handle 4K Ultra HD displays, features modern connectivity options such as DP 1.4 and HDMI 2.0, and can playback 4K video in new formats with 10-bit color and HDR10/Dolby Vision standards.

Intel 300-series Platform

Chipset options for the Pentium Gold G5600 include the top-end Z370 Express, which the platform debuted with, followed by the H370 Express, B360 Express, and entry-level H310 Express. The Z370 Express chipset, which succeeds the Z270 Express, appears to carry over the same platform feature set. It wouldn't surprise us if the Z370 turns out to be a re-brand of the Z270; however, we have no way of telling right now. The H370 has almost all features of the Z370, but one lesser M.2 slot, lack of CPU overclocking support, and lack of multi-GPU support. The B360 Express has fewer M.2 slots still. The entry-level H310 chipset is what most people will pair this chip with. As we mentioned on the previous page, 8th generation Core processors won't work on 100-series/200-series chipset motherboards.