AMD Radeon Instinct MI455X vs AMD Radeon R9 280
GPU · Specs Compare
Graphics Card
Release Date
Jul 2026
Mar 2014
Generation
Radeon Instinct
Volcanic Islands
Type
Desktop
Desktop
Bus Interface
PCIe 6.0 x16
PCIe 3.0 x16
Clock Speeds
Base Clock
1000 MHz
827 MHz
Boost Clock
2400 MHz
933 MHz
Memory Clock
1900 MHz
1250 MHz
Memory
Memory Size
432GB
3GB
Memory Type
HBM4
GDDR5
Memory Bus
24576bit
384bit
Bandwidth
23.3TB/s
240.0GB/s
Render Config
Compute Units
256
28
Shading Units
32768
1792
TMUs
1024
112
ROPs
0
32
L1 Cache
32 KB (per CU)
16 KB (per CU)
L2 Cache
192 MB
768 KB
Theoretical Performance
Pixel Rate
0 MPixel/s
29.86 GPixel/s
Texture Rate
2457.6 GTexel/s
104.5 GTexel/s
FP16 (half)
157.3 TFLOPS
—
FP32 (float)
157.3 TFLOPS
3.344 TFLOPS
FP64 (double)
2.458 TFLOPS
836.0 GFLOPS
Graphics Processor
GPU Name
MI450 256CU
Tahiti
Architecture
CDNA 5.0
GCN 1.0
Foundry
TSMC
TSMC
Process Size
2 nm
28 nm
Transistors
320 billion
4.313 billion
Die Size
Unknown
352 mm²
GPU Variant
—
Tahiti PRO3(215-0821330)
Board Design
TDP
2300W
200W
Suggested PSU
2700 W
550 W
Outputs
No outputs
1x DVI2x HDMI 1.4a1x DisplayPort 1.2
Power Connectors
None
1x 6-pin + 1x 8-pin
Graphics Features
DirectX
N/A
12 (11_1)
OpenGL
N/A
4.6
OpenCL
3.0
1.2
Vulkan
N/A
1.2
Shader Model
N/A
5.1
▲ Specs Compare
Data sourced from official specifications and benchmark tests.