The review of the AMD Ryzen 7 5800X3D can only start with a necessary preamble to place a particular processor, not surprisingly a unique child, that is designed to show the benefits of 3D V-Cache in view of its likely use in future AMD processors.
It thus stands as a glimpse of the future, touted as cheap in the face of the promise of maximum in-game performance, but not so cheap given the sacrifices in brute power and the use of an outdated platform. Yet it promises to take full advantage of even extreme-end GPUs such as the new NVIDIA GeForce RTX 3090 Ti and NVIDIA GeForce RTX 3080 Ti-a pair of heavyweights that we used to put AMD’s particular processor to the test.
With the AMD Ryzen 7 5800X3D we are looking at a peculiar experiment that combines a processor we know well, again based on 7-nanometer Zen 3 architecture and compatible with AMD 400 and 500 motherboards, with a new cache that looks to the future. In fact, it promises reduced latencies and, as a result, sharp increases in in-game performance that, let us say it now, are evident in some titles. But merging an outdated architecture with new technology involves some trade-offs.
The peculiar AMD processor, in fact, not only costs as much as higher brute power processors, with $449 recommended price and €545 actual actual price in large Italian retailers, but it has to make do with lower frequencies than the AMD Ryzen 7 5800X, which is 400 MHz faster in base clock and 200 MHz faster in boost. It also lacks CPU overclocking, unless you resort to ploys to circumvent the block imposed by AMD, but taking the risk may not necessarily bring benefits beyond the satisfaction of breaking some records.
In fact, according to AMD, the new processor already maximizes frequency and voltage, while still leaving the ability to overclock memory and interconnect Infinity Fabric so as to provide margins of gain over stock settings. This is ensuring the best possible operation to the 3D V-Cache, the three-dimensional cache designed to increase interconnection density and reduce latencies. And this is one of the keys to being able to take full advantage of increasingly powerful CPUs at a time when low resolutions, where the CPU is still relevant, are also back in vogue for 4K gamers, thanks to upscaling technologies.
It is no coincidence that the AMD Ryzen 7 5800X3D is being touted as the best gaming processor in existence, capable of measuring up to the top-of-the-line competition for a lower price. However, it still remains constrained to DDR4, limited frequencies, and a fading socket, destined to disappear with the arrival of AMD Ryzen 7000s with DDR5 memory, PCIe 5.0, and apparently integrated RDNA 2 GPUs as standard. All, it is rumored, with more cores and much higher frequencies.
It appears, however, that the first models may not have the three-dimensional cache that may remain exclusive to the AMD Ryzen 5800X3D until 2023, when a second series of AMD Ryzen 7000 processors is expected to arrive, barring surprises from Intel, which is already poised for a new generation that may conceal surprises. After all, three-dimensional caching is already a standard in SSDs while HBM2 stacked memory has already been used by AMD with Vega GPUs. In this case, things are more complex and it is likely that some pricing issues still need to be overcome, but such solutions are the future.
The 3D V-Cache of the AMD Ryzen 7 5800X3D provides 200 times the interconnect density of a classic two-dimensional solution, and through the combination of TSV and hybrid bonding it offers 15 times the density of 3D micro bump solutions while consuming one-third the power. In addition, the three-dimensional nature allows for an increase in L3 cache size, which in this case increases from the 32 MB of the AMD Ryzen 7 5800X to an impressive 96 MB. All thanks to the ability to stack 4.7 billion transistors in just 41mm^2 of surface area.
Otherwise the equipment, to which must be added a heatsink that is not included in the package, does not change one iota. So we are talking about a processor with a TDP of 105 watts, a maximum operating temperature of 90 degrees, 4 MB of level 2 cache, and native support for 3200 MHz DDR4 memory.