AMD Engineer confirms that RDNA 3 will make use of 5nm and 6nm silicon
AMD's high-end RDNA 3 products will use a hybrid architecture
Published: 4th February 2022 | Source: LinkedIn - Via @blueisviolet |
AMD Engineer confirms RDNA 3's hybrid lithography design
AMD has confirmed that new Radeon graphics cards based on the company's RDNA 3 architecture would be launching this year, succeeding their RDNA 2 product line with new enhancements and more performance. That said, AMD has said little about what RDNA 3 will offer, or how it improves upon RDNA 2's architectural achievements.
Thanks to an AMD engineer on LinkedIn (as spotted by @blueisviolet on Twitter), AMD's RDNA 3 based products will be built using a mix of 5nm and 6nm silicon. Three GPUs are listed, AMD's Navi 31, Navi 32 and Navi 33 silicon. Navi 31/32 appear to be built using 5nm and 6nm silicon, while Navi 33 appears to only use 6nm silicon. You can see this information on the screenshot below.
These data points suggest that a long-running rumour about AMD's RDNA 3 architecture is correct. It looks like AMD's high-end RDNA 3 products use a chiplet-based design, mixing silicon from various lithography nodes to create an ultra-high-end final product. It also looks like Navi 33 will use a monolithic design.
At this time, it is unknown how AMD will be using TSMC's 6nm and 5nm lithography nodes to create their RDNA 3 products. It looks like AMD will be using 6nm for their primary GPU silicon for Navi 33, with 5nm being used exclusively in their chiplet-based products. This suggests that 5nm chips will be used as a silicon bridge/inter-connect chip.
Currently, AMD has revealed nothing of substance about RDNA 3. That said, AMD knows the weaknesses of RDNA 2 (primarily ray tracing performance), and knows that a successfully implemented MCM gaming graphics card has the potential to deliver AMD staggering performance gains over rival silicon.
Using an MCM GPU design, AMD could allow two GPUs to act as a single, larger, chip, potentially enabling a near 2x performance boost over a single-chip design. If AMD is successful, their RDNA 3 graphics cards will deliver staggering performance levels.