Thursday, June 10th 2021
AMD Navi 23 Silicon Detailed, Higher Transistor Count than RX 5700 XT
AMD's third smallest silicon based on the RDNA2 graphics architecture, the Navi 23, has more transistors than its largest GPU based on RDNA, the Navi 10. This according to a leak detailing key physical specs of the silicon. The Navi 23 silicon will feature in the desktop Radeon RX 6600 series, mobile Radeon RX 6600M series, and the Radeon Pro W6600. The Navi 23 silicon has a transistor count of 11.06 billion, compared to 10.3 billion on the Navi 10 silicon that powers the Radeon RX 5700 XT, and has a die size of approximately 237 mm², compared to 251 mm² of the older chip.
Built on the same 7 nm silicon fabrication node as the other RDNA2 chips, Navi 23 physically features 32 compute units, working out to 2,048 stream processors. Other specs include 128 TMUs, and possibly 32 ROPs. The RDNA2 compute unit features Ray Accelerators, so the chip has 32 of them. The memory sub-system is interesting. The memory bus width is 128-bit, addressing GDDR6 memory, but this interface is cushioned by 32 MB of on-die Infinity Cache memory. This cache could be contributing significantly to the chip's overall transistor count. The chip features PCI-Express 4.0 host interface, although there's no clarity on whether this is PCI-Express 4.0 x8 or x16.Many Thanks to DeathtoGnomes for the tip
Built on the same 7 nm silicon fabrication node as the other RDNA2 chips, Navi 23 physically features 32 compute units, working out to 2,048 stream processors. Other specs include 128 TMUs, and possibly 32 ROPs. The RDNA2 compute unit features Ray Accelerators, so the chip has 32 of them. The memory sub-system is interesting. The memory bus width is 128-bit, addressing GDDR6 memory, but this interface is cushioned by 32 MB of on-die Infinity Cache memory. This cache could be contributing significantly to the chip's overall transistor count. The chip features PCI-Express 4.0 host interface, although there's no clarity on whether this is PCI-Express 4.0 x8 or x16.Many Thanks to DeathtoGnomes for the tip