AMD Radeon Instinct MI455X vs AMD Radeon RX 6600 LE
GPU · Specs Compare
Graphics Card
Release Date
Jul 2026
Dec 2023
Generation
Radeon Instinct
Navi II
Type
Desktop
Desktop
Bus Interface
PCIe 6.0 x16
PCIe 4.0 x8
Clock Speeds
Base Clock
1000 MHz
1626 MHz
Boost Clock
2400 MHz
2495 MHz
Memory Clock
1900 MHz
1750 MHz
Memory
Memory Size
432GB
8GB
Memory Type
HBM4
GDDR6
Memory Bus
24576bit
128bit
Bandwidth
23.3TB/s
224.0GB/s
Render Config
Compute Units
256
28
Shading Units
32768
1792
TMUs
1024
112
ROPs
0
64
L1 Cache
32 KB (per CU)
128 KB per Array
L2 Cache
192 MB
2 MB
RT Cores
—
28
L3 Cache
—
32 MB
Theoretical Performance
Pixel Rate
0 MPixel/s
159.7 GPixel/s
Texture Rate
2457.6 GTexel/s
279.4 GTexel/s
FP16 (half)
157.3 TFLOPS
17.88 TFLOPS
FP32 (float)
157.3 TFLOPS
8.942 TFLOPS
FP64 (double)
2.458 TFLOPS
558.9 GFLOPS
Graphics Processor
GPU Name
MI450 256CU
Navi 23
Architecture
CDNA 5.0
RDNA 2.0
Foundry
TSMC
TSMC
Process Size
2 nm
7 nm
Transistors
320 billion
11.06 billion
Die Size
Unknown
237 mm²
GPU Variant
—
Navi 23 XL(215-130000016)
Board Design
TDP
2300W
132W
Suggested PSU
2700 W
300 W
Outputs
No outputs
1x HDMI 2.13x DisplayPort 1.4a
Power Connectors
None
1x 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
6.7
▲ Specs Compare
Data sourced from official specifications and benchmark tests.