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AMD 3D V-Cache enables RAM disk to hit 182 GB/s speeds — over 12X faster than the fastest PCIe 5.0 SSDs

In a groundbreaking revelation, enthusiasts have uncovered a novel application for AMD's Ryzen 3D V-Cache...

AMD 3D V-Cache enables RAM disk to hit 182 GB/s speeds — over 12X faster than the fastest PCIe 5.0 SSDs

In a groundbreaking revelation, enthusiasts have uncovered a novel application for AMD’s Ryzen 3D V-Cache processors, pushing the boundaries of performance in a way that seems to defy conventional expectations. The discovery revolves around the use of a RAM disk, a technique that has enabled sequential read and write speeds to soar to an astonishing 182 GB/s—over 12 times faster than even the most advanced PCIe 5.0 SSDs currently available in the market.

This revelation surfaced when Albert Thomas, a respected figure in the cooling expert community, shared a screenshot displaying impressive performance metrics achieved by running a RAM disk on AMD’s Ryzen 7 7800X3D processor. Sequential read speeds reached an impressive 178 GB/s, while write speeds were equally impressive at 163 GB/s, as measured by the CrystalDiskMark benchmark. The standout feature was the use of a RAM disk, a method previously unexplored for such high-speed applications.

Initially met with skepticism due to the discrepancy in volume—508MB for the RAM disk versus the 96MB of L3 cache on the Ryzen 7 7800X3D—enthusiasts were quick to delve deeper into the methodology behind these seemingly extraordinary results. The skepticism was put to rest when a user known as Nemez on X (formerly Twitter) not only confirmed the legitimacy of the results but also shared a method to replicate the performance.

Nemez’s discovery centered around the use of OSFMount, free software designed to create RAM disks and mount image files in various formats. The key, however, lies not only in the software but in the meticulous configuration of CrystalDiskMark settings. To achieve jaw-dropping speeds, users must set test values to SEQ 256KB, queue depth to 1, and threads to 16.

Additionally, the data fill must be set to zeros instead of random, adding a layer of precision to the process. Nemez emphasized the potential need for multiple benchmark runs due to variations in system load.

While the experiment showcases the incredible capabilities of AMD’s 3D V-Cache processors, it comes with a dose of practical skepticism. Enthusiasts have acknowledged that, despite the allure of the unprecedented speeds, the method lacks consistency and may require trial and error to achieve optimal results. Furthermore, the 3D V-Cache on consumer Ryzen chips, such as the flagship Ryzen 9 7950X3D, with its 128MB of L3 cache, is deemed too small to offer tangible benefits in real-world scenarios.

However, the discussion doesn’t end there. Speculation arises about potential applications for AMD’s EPYC processors, particularly the Genoa-X, boasting a substantial 1.3GB of L3 cache. While the experiment may not be practically applicable for most users, it serves as a testament to the creative integration of both legacy and cutting-edge technologies.

The tantalizing idea of a fail-safe implementation, allowing consumers to effortlessly transform the 3D V-Cache into a RAM disk, opens up exciting prospects for enthusiasts looking to push the boundaries of technology integration. While the experiment may not be immediately practical, it underscores the ongoing potential for innovation in the realm of high-performance computing.

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