AMD RDNA 4 specs: support GDDR7, frequency up to 3.5GHz
On November 3, 2022, AMD hosted a special livestream event titled “together we advance_gaming”, and officially released the Radeon RX 7900 XTX and Radeon RX 7900 XT graphics cards based on the new generation RDNA 3 architecture GPU. At present, AMD has only launched one Navi 31, and there will be Navi 32 and Navi 33 GPUs next.
Although the new generation of graphics cards based on the RDNA 3 architecture GPU has not yet been fully rolled out, its design and performance are not satisfactory, and the first use of MCM packaging is also a test. According to RedGamingTech, the next-generation RDNA 4 architecture corresponds to the Radeon RX 8000 series, and there will be at least three GPUs, Navi 41, Navi 42, and Navi 43.
It is understood that the AMD RDNA 4 architecture still maintains 128 ALUs per CU, will support GDDR7 video memory, and will also support PCIe 5.0 or even PCIe 6.0. The existing RDNA 3 architecture is still lacking in ray tracing and AI/ML performance. AMD hopes to solve this problem on the RDNA 4 architecture and introduce WMMA V2 and third-generation infinite cache technology to further improve performance.
As a GPU with the highest positioning, the two possible configurations of Navi 41 are 4 MCDs supporting 32GB video memory, and 6 MCDs supporting 24/48GB video memory. It has 144 CUs, the frequency reaches 3.5 GHz, and the theoretical single-precision floating-point performance will reach 129 TFLOPS.
The number of CUs of Navi 42 is 96, which is the same as the flagship GPU of the current RDNA 3 architecture. If the frequency is still 3.5 GHz, the single-precision floating-point performance is 86 TFLOPS. The number of CUs of Navi 43 will be reduced to 48, the number of MCDs is only 2, and the single-precision floating-point performance at a frequency of 3.5 GHz is 43 TFLOPS, and it may not be packaged in MCM.
