amd-rdna-3-“navi-3x”-gpus-feature-double-the-cache-per-compute-unit-&-shader-array

AMD has listed down the newest data concerning the Cache sizes of their upcoming RDNA 3 “Navi 3X” GPUs inside Linux patches.

AMD’s Next-Gen RDNA 3 GPUs For Navi 3X Lineup To Double The Cache Size For Compute Units & Shader Array

Published over on the FreeDesktop Linux repository by AMD’s Aaron Liu and found by Coelacanth-Dream and Kepler_L2, we get to see the primary particulars concerning the cache sizes in upcoming RDNA 3 GPUs such because the Navi 31, Navi 32, and Navi 33 chips which have been lately leaked.

Coming to the small print, the AMD RDNA 3 (GFX11) GPU lineup will function double the L0 vector cache for every Compute Unit or CU and likewise double the GL1 knowledge cache (RDNA L1 cache for every Shader Array or SA. As per the brand new data, the Vector Register File per SIMD will enhance to 192KB vs 128KB on RDNA 2, the L0 Vector/Texture cache will enhance from 16 KB to 32 KB per CU, the GPU L1 Data Cache per Shader Array will enhance from 128 KB to 256 KB whereas the L2 Data Cache will stay the identical as RDNA 2.

AMD RDNA 3 'Navi 31' MCM GPUs Allegedly Rock Up To 384 MB of Infinity Cache In 3D V-Cache Flavors

There are additionally cache sizes listed for AMD’s Navi 33 and Phoenix APUs which can even function an RDNA 3 graphics core however in a monolithic bundle. The L0 Vector/Texture dimension is elevated from 16 KB to 32 KB whereas the L1 Data Cache (Graphics) is elevated from 128 KB to 256 KB. The Register file dimension stays untouched on Navi 33 GPUs & Phoenix APUs.

Cache Info Yellow Carp (Rembrandt) RDNA 3(GFX11 Navi 31/32) Phoenix (GC 11.0.1, GFX1103)
L0 Vector Register File per SIMD 128KiB 192KiB 128KiB
L0 Vector Data (per CU) 16KiB 32KiB 32KiB
L1 Scalar Inst. (per WGP) 32KiB 32KiB 32KiB
L1 Scalar Data (per WGP) 16KiB 16KiB 16KiB
GL1 Date (per SA) 128KiB 256KiB 256KiB
L2 Data 2048KiB (2MiB) 2048KiB (2MiB) 2048KiB (2MiB)
L3 (MALL) N/A Yes N/A

Coelacanth-Dream additionally states that each one RDNA 3 “Navi 3X” GPUs include VODP (Dual-Issue Wave32) directions, WMMA (Wave Matrix Multiply-Accumulate) help and the efficiency per WGP has been improved quite a bit. The elevated GL1 cache is alleged to enhance pixel processing efficiency and is amongst the numerous modifications that AMD is bringing inside its RDNA 3 Navi 3x GPU household.

AMD confirmed that its RDNA 3 GPUs shall be coming later this yr with an enormous efficiency uplift. The firm’s Senior Vice President of Engineering, Radeon Technologies Group, David Wang, mentioned that the next-gen GPUs for Radeon RX 7000 sequence will provide over 50% efficiency per watt uplift vs the prevailing RDNA 2 GPUs. Some of the important thing options of the RDNA 3 GPUs highlighted by AMD will embody:

  • 5nm Process Node
  • Advanced Chiplet Packaging
  • Rearchitected Compute Unit
  • Optimized Graphics Pipeline
  • Next-Gen AMD Infinity Cache
  • >50% Perf/Watt vs RDNA 2

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AMD shall be rearchitecting the compute models inside RDNA 3 to ship enhanced raytracing capabilities. Although there isn’t any point out of what these capabilities are if we have been to guess, we’d say it is positively speaking about efficiency and a set of superior options on the RDNA 3 GPU core for Radeon RX 7000 graphics playing cards. The AMD Radeon RX 7000 graphics playing cards are going to launch later this yr and provide a giant leap in gaming efficiency so keep tuned for more information within the coming weeks.

AMD RDNA 3 Navi 3X GPU Configurations (Preliminary)

GPU Name Navi 21 Navi 33 Navi 32 Navi 31 Navi 3X
Codename Sienna Cichlid Hotpink Bonefish Wheat Nas Plum Bonito TBD
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 203mm2 (Only GCD) 200mm2 (Only GCD)


425mm2 (with MCDs)
308mm2 (Only GCD)


533mm2 (with MCDs)
TBD
Shader Engines 4 2 4 6 8
GPU WGPs 40 16 30 48 64
SPs Per WGP 128 256 256 256 256
Compute Units (Per Die) 80 32 60 96 128 (per GPU)


256 (Total)
Cores (Per Die) 5120 4096 7680 12288 8192
Cores (Total) 5120 4096 7680 12288 16,384
Memory Bus 256-bit 128-bit 256-bit 384-bit 384-bit x2?
Memory Type GDDR6 GDDR6 GDDR6 GDDR6 GDDR6
Memory Capacity Up To 16 GB Up To 8 GB Up To 16 GB Up To 24 GB Up To 32 GB
Memory Speed 16-18 Gbps TBD TBD 20 Gbps TBD
Memory Bandwidth 512-576 GB/s TBD TBD 960 GB/s TBD
Infinity Cache 128 MB 32 MB 64 MB 96/192 MB TBD
Flagship SKU Radeon RX 6900 XTX Radeon RX 7600 XT? Radeon RX 7800 XT?


Radeon RX 7700 XT?
Radeon RX 7900 XT? Radeon Pro
TBP 330W ~150W ~250W ~350W TBD
Launch This autumn 2020 This autumn 2022? This autumn 2022? This autumn 2022? 2023?

AMD RDNA 3 “Navi 3X” GPUs Feature Double The Cache Per Compute Unit & Shader Array