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AMD RDNA 3 GPUs details for Radeon RX 7000 graphics cards

AMD RDNA 3 'Navi 31' MCM GPUs Allegedly Rock Up To 384 MB of Infinity Cache In 3D V-Cache Flavors
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Technology Outlet Angstronomics A very detailed roundup has been released of the specifications of AMD’s RDNA 3 GPUs such as the Navi 31, Navi 32, and Navi 33 chips that will power their next-generation Radeon RX 7000 series graphics cards.

GPUs Details for AMD Navi 31, Navi 32, Navi 33 “RDNA 3” Radeon RX 7000 Series Graphics Cards

Information has been leaked in Linux patches before published There are going to be at least four RDNA 3 IPs that will be launched for the consumer segment These include the Navi 31, Navi 32, Navi 33, and an APU design.

See GC IP GFX-ID AMDGPU_FAMILY (via Coelacanth-Dream) Type
11.0.0 gfx1100 (Navi31) AMDGPU_FAMILY_GC_11_0_0 (FAMILY_GFX1100) dGPU
11.0.1 gfx1103 AMDGPU_FAMILY_GC_11_0_2 (FAMILY_GFX1103) sister
11.0.2 gfx1102 (Navi32) AMDGPU_FAMILY_GC_11_0_0 (FAMILY_GFX1100) dGPU
11.0.3? gfx1101 (Navi33)? AMDGPU_FAMILY_GC_11_0_0 (FAMILY_GFX1100)? dGPU?

Now Angstronomics has reported information such as die size, GPU configuration, and features that may end up in final retail products. An interesting statement from the tech outlet revealed that the configurations for the Navi 3X GPUs were first formulated in 2019 and then finalized sometime in 2020. Although these specifications have not been changed, various rumors have indicated two different specifications for the GPUs Which means that AMD has actually changed since their final design or those rumors were not connected to the truth. With that being said, let’s see what kind of configurations we can expect with the Navi 3x “RDNA 3” GPU lineup.

AMD RDNA 3 Navi 3x GPU illustration shows possible chip configurations. (Image credit: Olrak_29)

amd sure Its RDNA 3 GPUs will arrive later this year with a huge performance boost. David Wang, the company’s senior vice president of engineering, Radeon Technologies Group, said that the next-gen Radeon RX 7000 series GPUs will offer a 50% performance per watt uplift compared to the current RDNA 2 GPUs. Some of the key features of the RDNA 3 GPU highlighted by AMD will include:

  • 5nm process node
  • Improved chiplet packaging
  • Rear Architect Compute Unit
  • Optimized graphics pipeline
  • Next-gen AMD Infinity Cache
  • >50% perf/watt vs RDNA 2

Gamers should expect liquid 4K gaming to be battery smooth on these graphics cards, and with the FidelityFX suite offering next-generation FSR, SAS and SAM support, we could even see playable 60 FPS at 8K resolution.

AMD Navi 31 “Plum Bonito” GPU configuration

The AMD Navi 31 GPU, the flagship RDNA 3 chip, will power next-generation enthusiast cards such as the Radeon RX 7900 XT graphics cards. We’ve heard that AMD will ditch the CU (compute unit) in favor of the WGP (work group processor) in its next-generation RDNA 3 GPUs. Each WGP will have dual CUs (compute units) but the RDNA 2 will have double SIMD32 clusters as opposed to only 2 per CU. Rumor has it that AMD has the option to choose between Samsung and TSMC for the 6nm die.

  • AMD Navi 31: 12288 cores, 384-bit bus, 192MB infinity cache, 308mm2 GPU die @5nm
  • AMD Navi 21: 5120 cores, 384-bit bus, 128MB infinity cache, 520mm2 GPU die @7nm

According to Latest information, the AMD Navi 31 GPU with RDNA 3 architecture is expected to offer a single GCD with 48 WGPs, 12 SAs, and 6 SEs. This will give a total of 12,288 SPs or stream processors. This is a 2.4x increase in cores compared to the 5120 SP featured on the Navi 21 GPU. The GPU or Navi 31 GCD measures 308mmtwo and will be packaged in TSMC’s 5nm process node.

The Navi 31 GPU will also carry 6 MCDs that will feature 16 MB of infinity cache per die and may also carry a 64-bit (32-bit x 2) memory controller that will provide the chip with 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 GPU, there is also a 3D-stacked solution in the works that As mentioned recently And it will double the Infinity cache with a capacity of 32 MB (16 MB 0-hi + 16 MB 1-hi) for a total cache of 192 MB. This is a 50% increase over the current Navi 21 design and makes the Navi 31 the first GPU with both a chiplet and 3D stacked design. These chips, or MCDs, will be manufactured on TSMC’s 6nm process node and measure 37.5mm.two each

The outlet reported that a larger 288 MB (16 MB 0-Hi + 16 MB 1-Hi + 16 MB 2-Hi) MCD package was planned but was scrapped due to cost-benefit considerations. There is also talk of a cut-down variant of the Navi 31 GPU that will feature 42 WGPs or 10,752 cores and 5 MCDs for 80MB of Infinity cache across a 320-bit bus interface.

Now, this is going to result in higher power draw and AMD seems to have sure So much so that their next generation graphics card lineup 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 already has a TBP of 335W so for a 2x performance gain. The cards will retain their dual 8-pin plug inputs for power and feature an updated triple-fan cooling design that’s slightly taller than the one currently in use.

AMD Navi 32 “Wheat Nas” GPU configuration

The AMD Navi 32 GPU codenamed “Wheat Nas” is also one of two MCM GPUs featured in the RDNA 3 lineup. The GPU will have a single GCD (Graphics Compute Dies) and four MCDs (Multi-Cache Dies). GPU or GCD is measured at 200mmtwo While each MCD will retain the same size of 37.5mmtwo.

  • AMD Navi 32: 7680 core, 256-bit bus, 64MB infinity cache, 200mm2 GPU die @5nm
  • AMD Navi 22: 2560 cores, 192-bit bus, 96MB infinity cache, 335mm2 GPU die @7nm

GCD will be equipped with 3 shader engines and each shader engine has 6 shader arrays (18 in total). The GPU will feature a total of 30 WGP or 60 compute units for a total of 7680 cores. That rounds up to >50% more cores than the Navi 31 flagship.

Each MCD should feature 2 memory connection links (32-bit). This is a total of 8 32-bit memory controllers for a 256-bit bus interface. Each MCD will retain 16 MB of 0-Hi capacity but there appears to be no 1-Hi variant meaning the chip will have a maximum configuration of 64 MB. That Navi 32 GPU is said to launch in 2023 and will be the highest chip for mobile and mid-level chip for desktop. The GPU will be brought to the mobile segment first and may be announced at CES 2023 which makes ideal sense as we will have Phoenix Range and Dragon Range laptops with Zen 4 cores.

AMD Navi 32 “Hotpink Bonefish” GPU configuration

The AMD Navi 33 GPU codenamed “Hotpink Bonefish” will start the monolithic segment within the RDNA 3 family. The GPU will have a single die. The die is the same as the flagship Navi 21 GPU and is expected to use a 6nm process node for fabrication with a 203mm die size.two.

  • AMD Navi 33: 4096 cores, 128-bit bus, 32MB infinity cache, 335mm2 GPU die @6nm
  • AMD Navi 23: 2048 cores, 128-bit bus, 32MB infinity cache, 237mm2 GPU die @7nm

Navi 33 GCD is expected to have 2 shader engines and each shader engine has 2 shader arrays (2 per SE/4 total). That’s 16 WGP or 32 compute units for a total of 4096 cores, more than the Radeon RX 6800 “Navi 21 XL” GPU. The GPU will be packaged with 32MB of Infinity cache, which is the same as the Navi 23 GPU, and spans a 128-bit wide bus. Similar to the Navi 32 GPUs, the Navi 33 chips will be focused first on the mobile lineup with basic graphics performance putting them ahead of the Intel Arc Alchemist lineup at less than half the cost and lower power draw.

The outlet also talks about two new features coming to the AMD RDNA 3 Navi 3x GPU for Radeon RX 7000 series graphics cards such as:

One of the features of the RDNA 3 graphics pipeline is OREO: Opaque Random Export Order, which is just one of many area preservation techniques. With gfx10, pixel shaders run out, where the outputs go into a re-order buffer before going to the rest of the pipeline. With OREO, the next stage (Mix) can now receive and execute operations in any order and export the sequence to the next stage. Thus, the ROB can be replaced with a much smaller skid buffer, storage area.

Memory Attached Last Level (MALL) cache blocks are halved each size, doubling the number of banks for the same cache size. There are also some tweaks and additions that boost graphics to MALL bandwidth and reduce the penalty of going to VRAM.

Through angstronomics

AMD Radeon RX 7000 “RDNA 3” GPU lineup based on Nav 3x GPUs is expected to launch later this year with reports that Navi 32 and Navi 33 GPUs will follow first.

AMD RDNA 3 Navi 3X GPU Configuration (Basic)

GPU name Navel 21 Navel 33 Navel 32 Navel 31 Navi 3X
GPU process 7nm 6nm 5nm/6nm 5nm/6nm 5nm/6nm
GPU package Monolithic Monolithic LCM (1 GCD + 4 GCD) LCM (1 GCD + 6 GCD) LCM (TBD)
GPU die size 520mm2 ~400mm2 440mm2 630mm2 TBD
Shader engine 4 two 4 6 8
GPU is WGP 40 20-16 40-32 60-48 64
WGP per SPs 128 256 256 256 256
Compute unit (per die) 80 40-32 160 -128 (Overall) 240-192 (overall) 128 (per GPU)
256 (Total)
Cores (per die) 5120 5120-4096 10240-8192 15360-12288 8192
core (total) 5120 5120-4096 10240-8192 15360-12288 16,384
memory-dwelling 256-bit 128-bit 256-bit 384-bit 384-bit x2?
memory type GDDR6 GDDR6 GDDR6 GDDR6 GDDR6
Memory capacity Up to 16GB Up to 8GB Up to 16GB Up to 24GB Up to 32 GB
Memory speed 16-18Gbps TBD TBD 20Gbps TBD
memory bandwidth 512-576GB/s TBD TBD 960GB/s TBD
Infinity cache 128MB 128MB 256MB 384MB TBD
Flagship SKUs Radeon RX 6900 XTX Radeon RX7600XT? Radeon RX7800XT?
Radeon RX7700XT?
Radeon RX7900XT? Radeon Pro
TBP 330W ~200W ~300W ~400W TBD
to start Q4 2020 Q4 2022? Q4 2022? Q4 2022? 2023?

Which next-generation AMD Radeon RX 7000 series graphics card are you most interested in?

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