Computers

Navi 23 GPU Has 64 ROPs and 32 Ray Tracing Cores

TechPowerUp Editor-In-Chief “W1zzard” received confirmation yesterday from AMD that the Navi 23 GPU will indeed have 64 ROPs; the same as it’s previous Navi 22 GPU, VideoCardz reports.

AMD Navi 23 GPU. Source: TechPowerUp

Aside from AMD announcing that the Navi 23 GPU is currently in use as the Radeon RX 6600M and three other unreleased projects, Elon Musk has also stated that the new GPU is in Tesla’s Model S information and entertainment system – something that is quoted to rival the Sony Playstation 5 console’s processing power.

AMD Radeon RX 6600 XT 8 GB Custom RDNA 2 ‘Navi 23’ Graphics Cards From Gigabyte Spotted at EEC

This new information now adds more speculation to other details of not only the Navi 23 units, but Radeon’s RX 6600M, Radeon Pro W6600(M), and the Radeon RX 6600 XT GPUs.

TechPowerUp breaks down the specs for the AMD Navi 23 GPU:

AMD’s Navi 23 GPU uses the RDNA 2.0 architecture and is made using a 7 nm production process at TSMC. With a die size of 237 mm² and a transistor count of 11,060 million it is a medium-sized chip. Navi 23 supports DirectX 12.0 (Feature Level 12_1). For GPU compute applications, OpenCL version 2.1 can be used. It features 2048 shading units, 128 texture mapping units and 64 ROPs. The GPU also contains 32 raytracing acceleration cores.

The Navi 23 GPU utilizes up to 32 CU (compute units). That is intriguing, considering that none of the products to be launched have been confirmed to only use 28 CU.

Last September, we posted a comparison of the Navi family of GPUs, including the new Navi 23:

Property Navi 10 Navi 14 Navi 12 Navi 21 Navi 22 Navi 23 Navi 31
num_se 2 1 2 4 2 2 4
num_cu_per_sh 10 12 10 10 10 8 10
num_sh_per_se 2 2 2 2 2 2 2
num_rb_per_se 8 8 8 4 4 4 4
num_tccs 16 8 16 16 12 8 16
num_gprs 1024 1024 1024 1024 1024 1024 1024
num_max_gs_thds 32 32 32 32 32 32 32
gs_table_depth 32 32 32 32 32 32 32
gsprim_buff_depth 1792 1792 1792 1792 1792 1792 1792
parameter_cache_depth 1024 1024 1024 1024 1024 1024 1024
double_offchip_lds_buffer 1 1 1 1 1 1 1
wave_size 32 32 32 32 32 32 32
max_waves_per_simd 20 20 20 16 16 16 16
max_scratch_slots_per_cu 32 32 32 32 32 32 32
lds_size 64 64 64 64 64 64 64
num_sc_per_sh 1 1 1 1 1 1 1
num_packer_per_sc 2 2 2 4 4 4 4
num_gl2a N/A N/A N/A 4 2 2 4
unknown0 N/A N/A N/A 10 10 8 10
unknown1 N/A N/A N/A 16 12 8 16
unknown2 N/A N/A N/A 80 40 32 80
num_cus (computed) 40 24 40 80 40 32 80

“WhyCry” at VideoCardz states:

AMD Radeon RX 6600M ‘Navi 23’ Laptop RDNA 2 GPU Tested, Slower Than The NVIDIA RTX 3060

Both the mobile Radeon RX 6600M as well as a desktop and mobile workstation Radeon PRO W6600M feature 1792 Stream Processors. With that in mind, 10 TFLOPs of FP32 compute power is already impressive enough because it means those GPUs peak at 2.9 GHz within 90-100W TDP.

AMD Radeon RX 6600 series specifications that we posted in more detail earlier this month.

AMD Radeon RX 6000 Series “RDNA 2” Graphics Card Lineup:

Graphics Card AMD Radeon RX 6600 AMD Radeon RX 6600 XT AMD Radeon RX 6700 AMD Radeon RX 6700 XT AMD Radeon RX 6800 AMD Radeon RX 6800 XT AMD Radeon RX 6900 XT AMD Radeon RX 6900 XT Liquid Cooled
GPU Navi 23 (XL?) Navi 23 (XT?) Navi 22 (XL?) Navi 22 (XT?) Navi 21 XL Navi 21 XT Navi 21 XTX Navi 21 XTXH
Process Node 7nm 7nm 7nm 7nm 7nm 7nm 7nm 7nm
Die Size 237mm2 237mm2 336mm2 336mm2 520mm2 520mm2 520mm2 520mm2
Transistors 11.06 Billion 11.06 Billion 17.2 Billion 17.2 Billion 26.8 Billion 26.8 Billion 26.8 Billion 26.8 Billion
Compute Units 28 32 36 40 60 72 80 80
Stream Processors 1792 2048 2304 2560 3840 4608 5120 5120
TMUs/ROPs TBA TBA TBA 160/64 240 / 96 288 / 128 320 / 128 320 / 128
Game Clock TBA TBA TBA 2424 MHz 1815 MHz 2015 MHz 2015 MHz 2250 MHz
Boost Clock TBA TBA TBA 2581 MHz 2105 MHz 2250 MHz 2250 MHz 2345 MHz
FP32 TFLOPs TBA TBA TBA 13.21 TFLOPs 16.17 TFLOPs 20.74 TFLOPs 23.04 TFLOPs 24.01 TFLOPs
Memory Size 8 GB GDDR6 + 32 MB Infinity Cache? 8 GB GDDR6 + 32 MB Infinity Cache? 12 GB GDDR6 + 96 MB Infinity Cache? 12 GB GDDR6 + 96 MB Infinity Cache 16 GB GDDR6 +128 MB Infinity Cache 16 GB GDDR6 +128 MB Infinity Cache 16 GB GDDR6 +128 MB Infinity Cache 16 GB GDDR6 +128 MB Infinity Cache
Memory Bus 128-bit? 192-bit 192-bit 192-bit 256-bit 256-bit 256-bit 256-bit
Memory Clock 16 Gbps? 16 Gbps? 16 Gbps? 16 Gbps 16 Gbps 16 Gbps 16 Gbps 18 Gbps
Bandwidth 256 GB/s? 256 GB/s? 384 GB/s 384 GB/s 512 GB/s 512 GB/s 512 GB/s 576 GB/s
TDP TBA TBA TBA 230W 250W 300W 300W 330W
Price TBA TBA TBA $479 US $579 US $649 US $999 US ~$1199 US

With the public having no access to the Navi 23 GPU or any driver information for the new GPU, there is still a large amount of guesswork and speculation until AMD releases information on their new graphics cards, such as the Radeon RX 6600XT GPU. But, this new information about the Navi 23 GPU definitely helps give us most of the clues regarding the RDNA2 chips powering both Sony and Microsoft’s home consoles.




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