AMD Radeon Instinct MI455X vs AMD Radeon HD 7870 XT
GPU · Specs Compare
Graphics Card
Release Date
Jul 2026
Nov 2012
Generation
Radeon Instinct
Southern Islands
Type
Desktop
Desktop
Bus Interface
PCIe 6.0 x16
PCIe 3.0 x16
Clock Speeds
Base Clock
1000 MHz
925 MHz
Boost Clock
2400 MHz
975 MHz
Memory Clock
1900 MHz
1500 MHz
Memory
Memory Size
432GB
2GB
Memory Type
HBM4
GDDR5
Memory Bus
24576bit
256bit
Bandwidth
23.3TB/s
192.0GB/s
Render Config
Compute Units
256
24
Shading Units
32768
1536
TMUs
1024
96
ROPs
0
32
L1 Cache
32 KB (per CU)
16 KB (per CU)
L2 Cache
192 MB
512 KB
Theoretical Performance
Pixel Rate
0 MPixel/s
31.20 GPixel/s
Texture Rate
2457.6 GTexel/s
93.60 GTexel/s
FP16 (half)
157.3 TFLOPS
—
FP32 (float)
157.3 TFLOPS
2.995 TFLOPS
FP64 (double)
2.458 TFLOPS
748.8 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 LE(215-0821122)
Board Design
TDP
2300W
185W
Suggested PSU
2700 W
450 W
Outputs
No outputs
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
Power Connectors
None
2x 6-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.