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A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11AMD’s COMPUTEX 2021 demonstration featured a Ryzen 5000 prototype with vertically stacked cache; contemporaneous coverage identified it as a Ryzen 9 5900X prototype with up to 192MB of L3 cache and up to 2TB/s of cache-link bandwidth. Those were demonstration figures—not specifications for a retail 192MB Ryzen 9 5900X X3D. The first retail Ryzen processor with 3D V-Cache was the 8-core Ryzen 7 5800X3D.
What AMD demonstrated at COMPUTEX 2021
AMD announced that it was demonstrating its first application of 3D chiplet technology: cache vertically bonded to a Ryzen 5000 Series processor prototype. The company described a hybrid-bond approach developed in close collaboration with TSMC and said production on future high-end products was on track to begin by the end of 2021. AMD’s announcement presented a technology demonstration, not a named shipping Ryzen 9 product. AMD’s May 31, 2021 announcement quotes CEO Lisa Su describing 3D chip design as “the next frontier of innovation in our industry.”
Where the 192MB and 2TB/s figures came from
Tom’s Hardware’s contemporaneous report on AMD’s demonstration identified the prototype as a Ryzen 9 5900X and described an additional 64MB cache die on each of its two core chiplets (CCDs). With the existing cache, that configuration could provide up to 96MB of L3 per CCD, or up to 192MB total across two CCDs. The same report gave a cache-link bandwidth figure of up to 2TB/s.
These numbers describe the two-CCD prototype configuration reported from the demonstration. AMD’s press release confirms vertically bonded cache but does not state the 192MB or 2TB/s figures. Neither number is a retail specification for a Ryzen 9 5900X X3D that AMD sold.
#1 Best Overall
- Powerful Content Creation and Game Performance
- 16 Cores and 32 processing threads, based on AMD "Zen 3" architecture
- 4.8 GHz Max Boost, unlocked for overclocking, 72 MB cache, DDR4-3200 support
- For the AMD Socket AM4 platform, with PCIe 4.0 support
- Cooler not included
What the prototype performance figures mean
Tom’s Hardware reported two sets of gaming results from AMD’s demonstration. They are AMD demo results as reported by the publication, not independent benchmark testing or a promise of the same uplift in every game or system.
| Reported result | Test context | How to interpret it |
|---|---|---|
| 12% increase in Gears 5 | Prototype compared with a standard Ryzen 9 5900X at a locked 4.0GHz, according to Tom’s Hardware’s report of AMD’s demo | A result for that game and comparison setup, not a general performance guarantee |
| Average 15% increase across shown games | AMD’s 1080p demonstration slides, as reported by Tom’s Hardware; games included Dota 2, Monster Hunter World, League of Legends, and Fortnite | An average for AMD’s selected game lineup, not an independently replicated result |
AMD later made a separate 15% gaming-performance claim for the retail Ryzen 7 5800X3D. Its launch footnote says AMD tested six games at 1920×1080 with high settings and identifies the systems and components used. That 2022 claim belongs to a different product and test; it should not be combined with the 2021 prototype results. See AMD’s Ryzen 7 5800X3D launch announcement and footnote.
Rank #2
- The world's best gaming desktop processor, with 12 cores and 24 processing threads
- Can deliver elite 100+ FPS performance in the world's most popular games
- Cooler not included, high-performance cooler recommended. Max Temperature- 90°C
- 4.8 GHz Max Boost, unlocked for overclocking, 70 MB of cache, DDR-3200 support
- For the advanced Socket AM4 platform, can support PCIe 4.0 on X570 and B550 motherboards
What AMD actually sold
AMD announced the Ryzen 7 5800X3D in January 2022 as its first consumer PC processor with 3D-stacked chiplets. It has 8 cores, unlike the 12-core Ryzen 9 5900X prototype described in the COMPUTEX coverage. In March 2022, AMD said global on-shelf availability would begin April 20 at a suggested price of $449 USD. Those are historical launch details, not current availability or pricing. AMD’s March 2022 availability announcement gives the date and suggested price.
The Ryzen 7 5800X3D is the relevant retail example of the technology. AMD’s later product families also include Ryzen X3D and EPYC processors with 3D V-Cache; AMD’s 3D V-Cache overview describes those subsequent product lines.
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Rank #4
- Powerful Gaming Performance
- 8 Cores and 16 processing threads, based on AMD "Zen 3" architecture
- 4.8 GHz Max Boost, unlocked for overclocking, 36 MB cache, DDR4-3200 support
- For the AMD Socket AM4 platform, with PCIe 4.0 support
- AMD Wraith Prism Cooler with RGB LED included
Rank #3
- Processor is versatile, reliable, and offers convenient usage with high speed
- Ryzen 9 product line processor for your convenience and optimal usage
- 5 nm process technology for reliable performance with maximum productivity
- Dodeca-core (12 Core) processor core allows multitasking with great reliability and fast processing speed
- 12 MB L2 plus 64 MB L3 cache memory provides excellent hit rate in short access time enabling improved system performance
Prototype versus retail processor
| Detail | COMPUTEX 2021 demonstration | Retail Ryzen 7 5800X3D |
|---|---|---|
| Product status | Prototype demonstration; AMD did not announce it as a shipping product | Consumer retail processor announced in 2022 |
| Processor and core count | Identified by Tom’s Hardware as a Ryzen 9 5900X prototype; the report discussed a two-CCD, 12- or 16-core configuration | Ryzen 7 5800X3D, 8 cores |
| L3 cache | Up to 192MB for the described two-CCD configuration, according to Tom’s Hardware’s report of AMD’s demo | Not stated in the cited launch and availability sources |
| Performance claim scope | 12% in Gears 5 at locked 4.0GHz; average 15% across AMD’s shown 1080p game selection, as reported by Tom’s Hardware | AMD claimed 15% more gaming performance; its footnote describes six games at 1920×1080 and high settings |
| Claim date | COMPUTEX 2021 | Launch announced January 2022; availability details announced March 2022 |
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
