AMD Radeon Instinct MI8 vs AMD Radeon R9 390 X2
GPU Specs Compare
Graphics Card
Release Date
Dec 2016
Sep 2015
Generation
Radeon Instinct
Pirate Islands
Type
Professional
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Memory Clock
500 MHz
1350 MHz
Memory
Memory Size
4GB
8GB
Memory Type
HBM
GDDR5
Memory Bus
4096bit
512bit
Bandwidth
512.0GB/s
345.6GB/s
Render Config
Compute Units
64
40
Shading Units
4096
2560
TMUs
256
160
ROPs
64
64
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
2 MB
1024 KB
Theoretical Performance
Pixel Rate
64.00 GPixel/s
64.00 GPixel/s
Texture Rate
256.0 GTexel/s
160.0 GTexel/s
FP16 (half)
8.192 TFLOPS
-
FP32 (float)
8.192 TFLOPS
5.120 TFLOPS
FP64 (double)
512.0 GFLOPS
640.0 GFLOPS
Graphics Processor
GPU Name
Fiji
Grenada
GPU Variant
Fiji XT CA(215-0862120)
Grenada PRO(215-0880030)
Architecture
GCN 3.0
GCN 2.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
8.9 billion
6.2 billion
Die Size
596 mm²
438 mm²
Board Design
TDP
175W
580W
Suggested PSU
450 W
950 W
Outputs
No outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
Power Connectors
1x 8-pin
4x 8-pin
Graphics Features
DirectX
12 (12_0)
12 (12_0)
OpenGL
4.6
4.6
OpenCL
2.1
2.0
Vulkan
1.2.170
1.2
Shader Model
6.5
6.3