AMD Radeon RX 7900 XTX 24GB & RX 7900 XT 20GB “RDNA 3” Graphics Cards Leaked

A few days ago we reported that AMD is working on the next generation RDNA 3 Radeon RX 7900 XTX & RX 7900 XT graphics cards. We can now confirm that this is indeed the case and the red team is planning to show off at least two options for the Navi 31 MCM next week, the RX 7900 XTX & RX 7900 XT.

AMD prepares Radeon RX 7900 XTX 24 GB and RX 7900 XT 20 GB launch next week

A leaker on Twitter, Chi11eddog (@g01d3nm4ng0) who has been super precise with his leaks so far, posted two images that don’t reveal much, but we can assure you that this data is from an internal AMD presentation that lists the upcoming RDNA 3 graphics cards. The cards mentioned in this list are AMD Radeon RX 7900 XTX 24 GB and Radeon RX 7900 XT 20 GB.

🧐🧐🧐🧐🧐
XT : 20 GB
XTX : 24GB
confirmed. pic.twitter.com/wcCvqcWcd1

— chi11eddog (@g01d3nm4ng0) October 29, 2022

in my dream…
7900XT 20GB 20Gbps GD6 320bit Type C x 1, DP x 2, HDMI x 1
7900XTX 24GB 20Gbps GD6 384bit Type C x 1, DP x 2, HDMI x 1

— chi11eddog (@g01d3nm4ng0) October 29, 2022

The reference board is mentioned here and it looks like AMD will keep the current display configuration which includes two DisplayPort, 1 HDMI and USB Type-C output.

AMD Radeon RX 7900 XTX 24GB Graphics Card ‘Rumoured’ Specs

The AMD Navi 31 GPU, the flagship RDNA 3 chip, will power next-generation enthusiast cards such as the Radeon RX 7900 XTX/XT graphics card. We’ve heard that AMD will ditch CUs (Compute Units) in favor of WGPs (Work Group Processors) on its next generation RDNA 3 GPUs. Each WGP will contain dual CUs (Compute Units), but with twice as many SIMD32 clusters, as opposed to only 2 on each CU within the RDNA 2. AMD is rumored to have the option to choose between Samsung and TSMC for a 6nm die.

• AMD Navi 31 XTX: 12288 Cores, 384-bit Bus, 192 MB Infinity Cache, 308 mm2 GPU Die @5nm
• AMD Navi 21 XTX: 5120 Cores, 384-bit Bus, 128 MB Infinity Cache, 520 mm2 GPU Die @7nm

According to the latest information, AMD Navi 31 GPU with RDNA 3 architecture is expected to offer one GCD with 48 WGP, 12 SA and 6 SE. This will give a total of 12,288 SPs or Stream Processors. This is a 2.4x increase in cores compared to the 5120 SPs included in the Navi 21 GPU. The GPU or Navi 31 GCD is said to measure 308mm² and will come packaged in TSMC’s 5nm process node.

The Navi 31 GPU will also carry 6 MCDs, which will have 16 MB of Infinity Cache per die, and will likely carry 64-bit (32-bit x 2) memory controllers, which will give the chip a 384-bit bus interface.

While this equates to 96 MB of Infinity Cache, which is less than the 128 MB featured on the current Navi 21 GPUs, there is also a 3D-Stacked solution that was recently specified that would double the Infinity Cache with 32 MB (16 MB 0-hi + 16 MB 1-hi) capacity for a total of 192 MB of cache memory. This is a 50% increase over the current Navi 21 design and also makes the Navi 31 the first GPU with a chiplet and 3D stacked design. These chips, or MCDs, will be manufactured on TSMC’s 6nm process node and will measure 37.5mm² everyone.

AMD Radeon RX 7900 XT 20GB Graphics Card ‘Rumoured’ Specs

There will also be a scaled-down variant that will include a Navi 31 XT GPU core. This chip will feature 42 WGP or 10,752 cores. That’s 12.5% ​​fewer kernels than the full-fat version. The GPU will also run at slightly lower clock speeds, but the power consumption will be lower.

• AMD Navi 31 XT: 12288 Cores, 320-bit Bus, 160 MB Infinity Cache, 308mm2 GPU Die @5nm
• AMD Navi 21 XT: 4608 Cores, 256-bit Bus, 128 MB Infinity Cache, 520 mm2 GPU Die @7nm

The graphics card will also feature 20GB of GDDR6 memory over a 320-bit wide bus interface. Since there are only 5 MCDs enabled, the card will end up with 80 MB of Infinity Cache, which is 16 MB less than the above option and a 16.6% reduction.

AMD Radeon RX 7900 XT “Preliminary” Specifications:

AMD has already confirmed that their next-gen range of graphics cards will have higher power consumption, but they will still be a more efficient option than what NVIDIA has to offer. The AMD Radeon RX 6950 XT now has a TBP of 335W, so for a >2x performance increase. The cards are expected to retain their dual 8-pin power connector and feature an updated three-fan cooling design that’s slightly taller than what’s currently in use.

AMD will unveil its RDNA 3 GPU architecture and Radeon RX 7000 graphics cards on November 3. Previous rumors have stated that the actual retail launch will take place in early December. They have a full live show planned, which you can read more about here.