AMD’s gold finish for the AM4 platform

AMD has released the Ryzen 7 5800X3D desktop processor as likely the latest high-end model for the AM4 platform. It uses a stacked SRAM chip (3D V-Cache), which triples the level 3 cache from 32 to 96 MB and thus reduces the relatively slow access to DDR4 memory.

This is particularly beneficial for games that are often latency-sensitive and therefore benefit the most from the large L3 cache. As a result, AMD is explicitly marketing the Ryzen 7 5800X3D as a gaming processor; the benchmarks confirm this, but those interested should also consider a few points.

Like the Ryzen 7 5800X, the X3D version uses eight CPU cores with a Zen 3 architecture. However, AMD lowers the maximum boost clock frequency from 4.7 to 4.5 GHz and the maximum CPU voltage increases from 1.5 volts to 1.35 volts. This improves temperature development, which can be critical, especially with stacked chips. This gives AMD a buffer to gain experience with 3D V-Cache without risking a high defect rate.

Games generally don’t care about clock deficits. In the worst case, they run almost as well on a Ryzen 7 5800X3D as they do on a Ryzen 7 5800X, but in most cases the X3D version puts more frames per second on the screen. The advantage ranged from 7% in the shooter “Metro Exodus” to 22% in the action-adventure “Shadow of the Tomb Raider”. There are outliers and clarifications: AMD reports a 15% performance advantage on average.

This puts the Ryzen 9 5800X3D roughly on par with Intel‘s best desktop model, the Core i9-12900KS, a select but very expensive version of the Core i9-12900K. In one game, the AMD processor is in the lead, in the other, the Intel processor – you should rarely notice a difference with such small differences.

Gaming Benchmarks (Windows 11, with Nvidia GeForce RTX 3090)

processor

Metropolitan exodus, 1080p high [fps]

Shadow of the Tomb Raider, 1080p high [fps]

Assassin’s Creed Odyssey, high resolution 1080p [fps]

Ryzen 7 5800X3D

175

250

140

Ryzen 7 5800X

163

205

125

Core i9-12900KS (DDR5)

174

229

147

Core i9-12900K (DDR5)

172

228

147

However, you might notice the efficiency, as the Ryzen 9 5800X3D is much cheaper than the Core i9-12900K and Core i9-12900KS: Under full CPU load with the Cinebench R23 rendering benchmark, our test system with Ryzen 7 5800X3D on the MSI MAG B550M Mortar motherboard with 16 GB of DDR4-3200 RAM and a GeForce GT 1030 for 156 W image output: test systems with Core i9-12900K and Core i9-12900K (each on an MSI Pro Z690-A Wi-Fi and 16GB DDR5-4800, no graphics card) managed well over 300 watts. As a result, Intel systems heat up the room faster, which is especially annoying in the summer.

Application Benchmarks and Power Consumption

processor

Cinema bench R23MT

Cinema bench R23 ST

Blender (classroom test)

MT system power consumption

[Punkte, mehr = besser] [Punkte, mehr = besser] [Sekunden, weniger = besser] [Watt, weniger = besser]

Ryzen 7 5800X3D

14,808

1487

361

156 (with GeForce GT 1030)

Ryzen 7 5800X

15,306

1603

355

178 (with GeForce GT 1030)

Core i9-12900KS (DDR5)

28,297

2115

233

320 (with iGPU)

Core i9-12900K (DDR5)

27,619

2026

235

310 (with iGPU)

Nominally the Ryzen 7 5800X3D has the same thermal design power (TDP) of 105 watts as the Ryzen 7 5800X and Ryzen 9 processors, resulting in an actual power limit of 142 watts, but in practice the processor is irritating in due to the lower voltage CPU, however, does not exceed this power limit as much as the sister models. A powerful CPU cooler is always recommended as the Ryzen 7 5800X3D likes to heat up at times.

Too bad: AMD prohibits any intervention on the power limit and the voltage curve of the Ryzen 7 5800X3D, so the undervoltage and the eco mode with a TDP of 65 watts do not work with the official tools either.

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