AMD Radeon HD 7950 Mac Edition vs AMD Radeon Instinct MI455X
GPU · Specs Compare
Graphics Card
Release Date
Mar 2013
Jul 2026
Generation
Southern Islands
Radeon Instinct
Type
Desktop
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 6.0 x16
Clock Speeds
Memory Clock
1250 MHz
1900 MHz
Base Clock
—
1000 MHz
Boost Clock
—
2400 MHz
Memory
Memory Size
3GB
432GB
Memory Type
GDDR5
HBM4
Memory Bus
384bit
24576bit
Bandwidth
240.0GB/s
23.3TB/s
Render Config
Compute Units
28
256
Shading Units
1792
32768
TMUs
112
1024
ROPs
32
0
L1 Cache
16 KB (per CU)
32 KB (per CU)
L2 Cache
768 KB
192 MB
Theoretical Performance
Pixel Rate
25.60 GPixel/s
0 MPixel/s
Texture Rate
89.60 GTexel/s
2457.6 GTexel/s
FP32 (float)
2.867 TFLOPS
157.3 TFLOPS
FP64 (double)
716.8 GFLOPS
2.458 TFLOPS
FP16 (half)
—
157.3 TFLOPS
Graphics Processor
GPU Name
Tahiti
MI450 256CU
GPU Variant
Tahiti PRO(215-0821056)
—
Architecture
GCN 1.0
CDNA 5.0
Foundry
TSMC
TSMC
Process Size
28 nm
2 nm
Transistors
4.313 billion
320 billion
Die Size
352 mm²
Unknown
Board Design
TDP
200W
2300W
Suggested PSU
550 W
2700 W
Outputs
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
No outputs
Power Connectors
2x 6-pin
None
Graphics Features
DirectX
12 (11_1)
N/A
OpenGL
4.6
N/A
OpenCL
1.2
3.0
Vulkan
1.2
N/A
Shader Model
5.1
N/A
▲ Specs Compare
Data sourced from official specifications and benchmark tests.