AMD Radeon Vega 8 vs AMD Radeon Instinct MI455X
GPU Specs Compare
Graphics Card
Release Date
Jan 2021
Jul 2026
Generation
Cezanne
Radeon Instinct
Type
Integrated
Desktop
Bus Interface
IGP
PCIe 6.0 x16
Clock Speeds
Base Clock
300 MHz
1000 MHz
Boost Clock
2000 MHz
2400 MHz
Memory Clock
System Shared
1900 MHz
Memory
Memory Size
System Shared
432GB
Memory Type
System Shared
HBM4
Memory Bus
System Shared
24576bit
Bandwidth
System Dependent
23.3TB/s
Render Config
Compute Units
8
256
Shading Units
512
32768
TMUs
32
1024
ROPs
8
0
L1 Cache
-
32 KB (per CU)
L2 Cache
-
192 MB
Theoretical Performance
Pixel Rate
16.00 GPixel/s
0 MPixel/s
Texture Rate
64.00 GTexel/s
2457.6 GTexel/s
FP16 (half)
4.096 TFLOPS
157.3 TFLOPS
FP32 (float)
2.048 TFLOPS
157.3 TFLOPS
FP64 (double)
128.0 GFLOPS
2.458 TFLOPS
Graphics Processor
GPU Name
Cezanne
MI450 256CU
Architecture
GCN 5.1
CDNA 5.0
Foundry
TSMC
TSMC
Process Size
7 nm
2 nm
Transistors
9.8 billion
320 billion
Die Size
156 mm²
Unknown
Board Design
TDP
45W
2300W
Outputs
No outputs
No outputs
Power Connectors
None
None
Suggested PSU
-
2700 W
Graphics Features
DirectX
12 (12_1)
N/A
OpenGL
4.6
N/A
OpenCL
2.1
3.0
Vulkan
1.2
N/A
Shader Model
6.4
N/A
📊 Benchmark
3DMark Time Spy
893
-
3DMark Time Spy Extreme
423
-