AMD Radeon Instinct MI455X vs AMD Radeon RX 6950 XT
GPU · Specs Compare
Graphics Card
Release Date
Jul 2026
May 2022
Generation
Radeon Instinct
Navi II
Type
Desktop
Desktop
Bus Interface
PCIe 6.0 x16
PCIe 4.0 x16
Clock Speeds
Base Clock
1000 MHz
1860 MHz
Boost Clock
2400 MHz
2310 MHz
Memory Clock
1900 MHz
2250 MHz
Memory
Memory Size
432GB
16GB
Memory Type
HBM4
GDDR6
Memory Bus
24576bit
256bit
Bandwidth
23.3TB/s
576.0GB/s
Render Config
Compute Units
256
80
Shading Units
32768
5120
TMUs
1024
320
ROPs
0
128
L1 Cache
32 KB (per CU)
128 KB per Array
L2 Cache
192 MB
4 MB
RT Cores
—
80
L3 Cache
—
128 MB
Theoretical Performance
Pixel Rate
0 MPixel/s
295.7 GPixel/s
Texture Rate
2457.6 GTexel/s
739.2 GTexel/s
FP16 (half)
157.3 TFLOPS
47.31 TFLOPS
FP32 (float)
157.3 TFLOPS
23.65 TFLOPS
FP64 (double)
2.458 TFLOPS
1478 GFLOPS
Graphics Processor
GPU Name
MI450 256CU
Navi 21
Architecture
CDNA 5.0
RDNA 2.0
Foundry
TSMC
TSMC
Process Size
2 nm
7 nm
Transistors
320 billion
26.8 billion
Die Size
Unknown
520 mm²
GPU Variant
—
Navi 21 KXTX(215-121000289)
Board Design
TDP
2300W
335W
Suggested PSU
2700 W
700 W
Outputs
No outputs
1x HDMI 2.12x DisplayPort 1.4a
Power Connectors
None
2x 8-pin
Graphics Features
DirectX
N/A
12 Ultimate (12_2)
OpenGL
N/A
4.6
OpenCL
3.0
2.1
Vulkan
N/A
1.3
Shader Model
N/A
6.5
▲ Specs Compare
Data sourced from official specifications and benchmark tests.