AMD Radeon RX 6800M vs AMD Radeon Instinct MI455X
GPU · Specs Compare
Graphics Card
Release Date
May 2021
Jul 2026
Generation
Mobility Radeon
Radeon Instinct
Type
Mobile
Desktop
Bus Interface
PCIe 4.0 x16
PCIe 6.0 x16
Clock Speeds
Base Clock
2116 MHz
1000 MHz
Boost Clock
2390 MHz
2400 MHz
Memory Clock
2000 MHz
1900 MHz
Memory
Memory Size
12GB
432GB
Memory Type
GDDR6
HBM4
Memory Bus
192bit
24576bit
Bandwidth
384.0GB/s
23.3TB/s
Render Config
Compute Units
40
256
Shading Units
2560
32768
TMUs
160
1024
ROPs
64
0
RT Cores
40
—
L1 Cache
128 KB per Array
32 KB (per CU)
L2 Cache
3 MB
192 MB
L3 Cache
96 MB
—
Theoretical Performance
Pixel Rate
153.0 GPixel/s
0 MPixel/s
Texture Rate
382.4 GTexel/s
2457.6 GTexel/s
FP16 (half)
24.47 TFLOPS
157.3 TFLOPS
FP32 (float)
12.24 TFLOPS
157.3 TFLOPS
FP64 (double)
764.8 GFLOPS
2.458 TFLOPS
Graphics Processor
GPU Name
Navi 22
MI450 256CU
GPU Variant
Navi 22 XTM
—
Architecture
RDNA 2.0
CDNA 5.0
Foundry
TSMC
TSMC
Process Size
7 nm
2 nm
Transistors
17.2 billion
320 billion
Die Size
335 mm²
Unknown
Board Design
TDP
145W
2300W
Outputs
No outputs
No outputs
Power Connectors
None
None
Suggested PSU
—
2700 W
Graphics Features
DirectX
12 Ultimate (12_2)
N/A
OpenGL
4.6
N/A
OpenCL
2.1
3.0
Vulkan
1.3
N/A
Shader Model
6.5
N/A
Benchmark
3DMark Time Spy
11,498
—
3DMark Time Spy Extreme
5,418
—
3DMark Speed Way
2,096
—
Blender
1,568
—
▲ Specs Compare
Data sourced from official specifications and benchmark tests.