AMD Radeon Instinct MI455X vs AMD Radeon RX 7950 XTX
GPU Specs Compare
Graphics Card
Release Date
Jul 2026
Unknown
Generation
Radeon Instinct
Navi III
Type
Desktop
Desktop
Bus Interface
PCIe 6.0 x16
PCIe 4.0 x16
Clock Speeds
Base Clock
1000 MHz
2200 MHz
Boost Clock
2400 MHz
3300 MHz
Memory Clock
1900 MHz
2500 MHz
Memory
Memory Size
432GB
24GB
Memory Type
HBM4
GDDR6
Memory Bus
24576bit
384bit
Bandwidth
23.3TB/s
960.0GB/s
Render Config
Compute Units
256
96
Shading Units
32768
6144
TMUs
1024
384
ROPs
0
192
L1 Cache
32 KB (per CU)
256 KB per Array
L2 Cache
192 MB
6 MB
RT Cores
-
96
L3 Cache
-
96 MB
Theoretical Performance
Pixel Rate
0 MPixel/s
633.6 GPixel/s
Texture Rate
2457.6 GTexel/s
1267 GTexel/s
FP16 (half)
157.3 TFLOPS
162.2 TFLOPS
FP32 (float)
157.3 TFLOPS
81.10 TFLOPS
FP64 (double)
2.458 TFLOPS
2.534 TFLOPS
Graphics Processor
GPU Name
MI450 256CU
Navi 31
Architecture
CDNA 5.0
RDNA 3.0
Foundry
TSMC
TSMC
Process Size
2 nm
5 nm
Transistors
320 billion
57.7 billion
Die Size
Unknown
529 mm²
GPU Variant
-
Navi 31 XTX+
Board Design
TDP
2300W
355W
Suggested PSU
2700 W
750 W
Outputs
No outputs
1x HDMI 2.1a2x DisplayPort 2.11x USB Type-C
Power Connectors
None
2x 8-pin
Graphics Features
DirectX
N/A
12 Ultimate (12_2)
OpenGL
N/A
4.6
OpenCL
3.0
2.2
Vulkan
N/A
1.3
Shader Model
N/A
6.7