The premiere tests of AMD Ryzen 9 processors 5900 X and Ryzen 9 5950 X made everyone appetite, but they attracted the most attention much more affordable AMD Ryzen 7 5800 X and Ryzen 5 5600 X, which could ultimately seal the success of Zen 3 architecture. Since the first two models have essentially no competition in Intel’s mainstream offer, the manufacturer the upper segment may dictate the terms, but the remaining units will be compared with their counterparts belonging to the Comet Lake family. The competition begins to take a blush, as will be shown by the test of AMD Ryzen 7 processors 5800 X vs Intel Core i7- 10700 K, formerly known as Intel Core i9 – 9900 K. Will eight AMD cores actually be noticeably more efficient, energy-efficient and more profitable?

Author: Sebastian Oktaba

AMD Zen 3 architecture has passed a number of significant modifications that allowed to increase the performance of a single core by approximately 20% compared to Zen 2, while eliminating internal lags that are the biggest problems with AMD Ryzen processors. First of all, one CCX cluster now has 8 instead of 4 cores, spiced up with SMT support and 32 MB L3 cache. The individual CCX modules were created in 7 nm TSMC lithography, while the cIOD with e.g. DDR4 memory controller – 3200 uses 12 nm production process. Communication takes place again via the Infinity Fabric bus, but thanks to reducing internal delays, e.g. between modules, cores, and the main memory or cache, which now has much more for each CCX, a measurable increase in throughput was achieved. The prediction and queuing of orders, management of cache structures were also improved, FPU units were accelerated by increasing their capacity, the ring bus, data collection and integration algorithms were rebuilt. The engineers really did not idle, because the list of modifications is much longer and I have listed only the most important, crucial from the point of performance. In addition, the energy efficiency has been increased plus the Precision Boost 2 technology has been improved, achieving higher clock speeds with a lower supply voltage.

AMD Ryzen 7 5800 X is the exact half of AMD Ryzen 9 5950 X, therefore it is based on one CCX, which can bring tangible profits even with fewer cores, cache or a little lower clock speed.

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AMD Ryzen processor 5800 X is based on a single CCX module containing eight physical cores, supporting up to sixteen threads simultaneously thanks to SMT (Simultaneous Multithreading) technology He also got direct access to full 32 MB L3 cache and 4 MB L2 cache. The reviewed model is the exact half of AMD Ryzen 5950 X. If the processor uses a single CCX, the question will automatically arise whether it will work more efficiently, as shown in the case of AMD Ryzen 3 3100 (2 + 2 ) and Ryzen 3 3300 X ( 4 + 0). Even lower in-house delays can compensate for the smaller L2 / L3 size and slightly lower clock speeds. There is also hope of achieving a higher frequency of the Infinity Fabric bus, which in the Zen 3 architecture can reach stable 4000 MHz in synchronous mode (1: 1). The main competitor of AMD Ryzen 5800 X will be Intel Core i7 – 10700 K (F) with identical configuration, just like Intel Core i9 – 9900 K (F). As the AMD player loses the advantage due to “win rdzyniu”, we can finally compare the direct counterparts (8R / 5600 W), where additional cores and threads stop playing any important role – it will count only pure performance and profitability. AMD Ryzen 5800 X should be a much more interesting proposition for demanding players than the more expensive Ryzen 9 models 5900 X and Ryzen 9 5950 X, aspiring to be called quasi-HEDT.

	Core i9 – 10900 K	Core i7 – 10700 K	Ryzen 9 5900 X	Ryzen 7 5600 X
Architecture	Comet Lake	Coffee Lake	Zen 3	Zen 3
Lithography	14 nm	14 nm	7 nm	7 nm
right	3700 – 5300 MHz	3800 – 5100 MHz	3700 – 4800 MHz	3800 – 4700 MHz
Configuration	10 R / 20 In	8R / 16 In	12 R / 24IN	8R / 16 In
L3 memory	20 MB	16 MB	64 MB
32 MB
Multiplier	Unlocked	Unlocked	Unlocked	Unlocked
Memory controller	DDR4 – 2933	DDR4- 2933	DDR4 – 3200	DDR4 – 3200
Controller Mode	Dual Channel	Dual Channel	Dual Channel	Dual Channel
TDP Factor	125 In	125 In	105IN	105 In
Integrated G PU	UHD 630	UHD 630	–	–
Starting price	499 USD	379 USD	549 USD	449 USD
Platform	LGA 1200	LGA 1200	AM4	AM4
Release date	May 2020	May 2020	November 2020	November 2020

AMD Ryzen 9 processor test 5950 X – Extremely Fast 16 cores

AMD Ryzen 7 base clock 5800 X is 3800 MHz, however, it should not fall below 4500 MHz, which I noted while loading all Cinebench R cores 20 (Multi Thread). The maximum Core Boost is theoretically 4700 MHz, although it often reaches the clock 4840 MHz, because the new versions of the Precission Boost and Extended Frequency Range technologies perfectly lead the cores . Unfortunately, the frequencies turn out to be a bit lower than the more powerful models that cross the barrier 5000 MHz. AMD Ryzen 7 5800 X makes up for it with a more stable boost on more cores – when testing The Witcher 3: The Wild Hunt seven ran at clock speeds exceeding 4800 MHz. The rest of the specs are remarkably standard – Dual Channel DDR4 Memory Controller – 3200, soldered radiator, no integrated graphics, unlocked multiplier and TDP coefficient 105 In (similar to higher-positioned models). Starting price vs. AMD Ryzen 3800 X increased by exactly 50 USD, while Vermeer currently supports only motherboards with series chipsets 500 – series owners 400 have to patiently wait a few weeks for the official BIOSes . It’s also worth remembering that the reviewed AMD Ryzen 7 5800 X is sold without a cooling system.

NOTE: AMD Ryzen 7 processors 5800 X and Intel Core i7 – 10700 K will be the heroes of one more test, where they will be overclocked to the maximum, they will get 4x 8 GB DDR4 memory with calibrated timings (DDR4 – 3800 CL 14 / DDR4- 4000 CL 16). However, the graphics cards will be NVIDIA GeForce RTX 3080 and AMD Radeon RX 6800 XT. That is why I did not carry out additional measurements with memory scaling this time, because this topic will be examined much more thoroughly in the next publication – the premiere in November.