AMD Radeon Instinct MI455X vs AMD Radeon HD 6850 X2
GPU · Specs Compare
Graphics Card
Release Date
Jul 2026
Sep 2011
Generation
Radeon Instinct
Northern Islands
Type
Desktop
Desktop
Bus Interface
PCIe 6.0 x16
PCIe 2.0 x16
Clock Speeds
Base Clock
1000 MHz
—
Boost Clock
2400 MHz
—
Memory Clock
1900 MHz
1050 MHz
Memory
Memory Size
432GB
2GB
Memory Type
HBM4
GDDR5
Memory Bus
24576bit
256bit
Bandwidth
23.3TB/s
134.4GB/s
Render Config
Compute Units
256
12
Shading Units
32768
960
TMUs
1024
48
ROPs
0
32
L1 Cache
32 KB (per CU)
8 KB (per CU)
L2 Cache
192 MB
512 KB
Theoretical Performance
Pixel Rate
0 MPixel/s
25.60 GPixel/s
Texture Rate
2457.6 GTexel/s
38.40 GTexel/s
FP16 (half)
157.3 TFLOPS
—
FP32 (float)
157.3 TFLOPS
1.536 TFLOPS
FP64 (double)
2.458 TFLOPS
—
Graphics Processor
GPU Name
MI450 256CU
Barts
Architecture
CDNA 5.0
TeraScale 2
Foundry
TSMC
TSMC
Process Size
2 nm
40 nm
Transistors
320 billion
1.7 billion
Die Size
Unknown
255 mm²
GPU Variant
—
Barts PRO(215-0798006)
Board Design
TDP
2300W
254W
Suggested PSU
2700 W
600 W
Outputs
No outputs
2x DVI1x HDMI 1.3a1x DisplayPort 1.1
Power Connectors
None
2x 8-pin
Graphics Features
DirectX
N/A
11.2 (11_0)
OpenGL
N/A
4.4
OpenCL
3.0
1.2
Vulkan
N/A
N/A
Shader Model
N/A
5.0
▲ Specs Compare
Data sourced from official specifications and benchmark tests.