AMD Radeon RX 7900 “Navi 31” RDNA 3 graphics cards are said to have 20 Gbps of memory

AMD Radeon RX 7900 “Navi 31” RDNA 3 graphics cards are said to have 20 Gbps of memory

AMD may equip its upcoming high-end Radeon RX 7900 series graphics cards based on Navi 31 “RDNA 3” GPUs with faster GDDR6 memory chips.

AMD’s high-end RDNA 3 “Navi 31” Powered Radeon RX 7900 graphics cards are said to have 20 Gbps of memory

The latest rumor comes from Greymon55 and states that the red team’s fastest RDNA 3 GPUs, based on the Navi 31 SKU, will use faster GDDR6 memory chips. AMD’s RDNA 2-powered Navi GPUs feature memory speeds of up to 18Gbps. 18Gbps memory was added to the recent RDNA 2 update, while the original lineup used 16Gbps chips.

It is stated that the Radeon RX 7900 series, which will cover the high-end segment with its powerful MCM-based Navi 31 GPU design, will offer up to 20Gbps memory speed. That’s an 11% increase over the existing fastest memory solution for the AMD Radeon RX 6000 cards.

Considering that the AMD Radeon RX 7900 series flagship is equipped with a 384-bit bus interface, we get a solution with a bandwidth of 960 GB/s, in addition there is also the bandwidth of Infinity Cache, which is expected increased to 384 MB (192 MB standard + 192 MB 3D V-cache in six MCDs). Recent speculation has shown that the Radeon RX 7900 series with the new MCD Infinity Cache structure can offer a theoretical bandwidth of up to 7 TB/s, which is a massive increase over the 1, 79 TB/s bandwidth would be card.

But that’s not all, the leaker also says that an RDNA 3 refresh could include the high-end 24 Gbps memory chips. This would yield the same GDDR6 bandwidth as NVIDIA’s flagship GeForce RTX 3090 Ti graphics card. Even the RTX 4090 Ti is expected to use 24Gbps memory chips, although we’ll see if that plan changes in the future. When the refresh is slated to be in late 2023 or early 2024, we still have more than a year to witness the launch of the original AMD RDNA 3 family before we start talking about a refresh. The store would be equipped with all refreshed models.

AMD RDNA 3 Navi 3X GPU configurations (preliminary)

GPU name GPS 21 GPS 33 GPS 32 Navi 31 GPS 3X
GPU process 7nm 6nm 5nm/6nm 5nm/6nm 5nm/6nm
GPU package Monolithic Monolithic MCM (1 GCD + 4 MCD) MCM (1 GCD + 6 MCD) MCM (TBD)
GPU die size 520mm2 ~400mm2 440mm2 630mm2 open
shader engines 4 2 4 6 8th
GPU WGPs 40 20-16 40-32 60-48 64
SPs per WGP 128 256 256 256 256
Units of calculation (per cube) 80 40-32 160 -128 (total) 240-192 (total) 128 (per GPU)
256 (total)
cores (per die) 5120 5120-4096 10240-8192 15360-12288 8192
cores (total) 5120 5120-4096 10240-8192 15360-12288 16,384
memory bus 256-bit 128-bit 256-bit 384-bit 384-bit x2?
storage type GDDR6 GDDR6 GDDR6 GDDR6 GDDR6
storage capacity Up to 16GB Up to 8GB Up to 16GB Up to 24GB Up to 32GB
memory speed 16-18 Gbps open open 20 Gbps open
memory bandwidth 512-576GB/s open open 960GB/s open
Infinity Cache 128MB 128MB 256MB 384MB open
Flagship SKU Radeon RX6900XTX Radeon RX7600XT? Radeon RX7800XT?
Radeon RX7700XT?
Radeon RX7900XT? RadeonPro
TBP 330W ~200W ~300W ~400W open
begin Q4 2020 Q4 2022? Q4 2022? Q4 2022? 2023?

News Source: Videocardz

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