AMD Radeon Instinct MI455X vs AMD Radeon RX 9070
GPU Specs Compare
Graphics Card
Release Date
Jul 2026
Mar 2025
Generation
Radeon Instinct
Navi IV
Type
Desktop
Desktop
Bus Interface
PCIe 6.0 x16
PCIe 5.0 x16
Clock Speeds
Base Clock
1000 MHz
1330 MHz
Boost Clock
2400 MHz
2520 MHz
Memory Clock
1900 MHz
2518 MHz
Memory
Memory Size
432GB
16GB
Memory Type
HBM4
GDDR6
Memory Bus
24576bit
256bit
Bandwidth
23.3TB/s
644.6GB/s
Render Config
Compute Units
256
56
Shading Units
32768
3584
TMUs
1024
224
ROPs
0
128
L1 Cache
32 KB (per CU)
128 KB per Array
L2 Cache
192 MB
8 MB
Tensor Cores
-
112
RT Cores
-
56
L3 Cache
-
64 MB
Theoretical Performance
Pixel Rate
0 MPixel/s
322.6 GPixel/s
Texture Rate
2457.6 GTexel/s
564.5 GTexel/s
FP16 (half)
157.3 TFLOPS
72.25 TFLOPS
FP32 (float)
157.3 TFLOPS
36.13 TFLOPS
FP64 (double)
2.458 TFLOPS
1129 GFLOPS
Graphics Processor
GPU Name
MI450 256CU
Navi 48
Architecture
CDNA 5.0
RDNA 4.0
Foundry
TSMC
TSMC
Process Size
2 nm
4 nm
Transistors
320 billion
53.9 billion
Die Size
Unknown
357 mm²
GPU Variant
-
Navi 48 XT(215-176600331)
Board Design
TDP
2300W
220W
Suggested PSU
2700 W
550 W
Outputs
No outputs
1x HDMI 2.1b3x DisplayPort 2.1a
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
6.8