AMD Radeon R9 390 X2 vs AMD Radeon RX 560X
GPU Specs Compare
Graphics Card
Release Date
Sep 2015
Apr 2018
Generation
Pirate Islands
Polaris
Type
Desktop
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x8
Clock Speeds
Memory Clock
1350 MHz
1750 MHz
Base Clock
-
1175 MHz
Boost Clock
-
1275 MHz
Memory
Memory Size
8GB
4GB
Memory Type
GDDR5
GDDR5
Memory Bus
512bit
128bit
Bandwidth
345.6GB/s
112.0GB/s
Render Config
Compute Units
40
16
Shading Units
2560
1024
TMUs
160
64
ROPs
64
16
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
1024 KB
1024 KB
Theoretical Performance
Pixel Rate
64.00 GPixel/s
20.40 GPixel/s
Texture Rate
160.0 GTexel/s
81.60 GTexel/s
FP32 (float)
5.120 TFLOPS
2.611 TFLOPS
FP64 (double)
640.0 GFLOPS
163.2 GFLOPS
FP16 (half)
-
2.611 TFLOPS
Graphics Processor
GPU Name
Grenada
Polaris 21
GPU Variant
Grenada PRO(215-0880030)
Polaris 21 XT(215-0908004)
Architecture
GCN 2.0
GCN 4.0
Foundry
TSMC
GlobalFoundries
Process Size
28 nm
14 nm
Transistors
6.2 billion
3 billion
Die Size
438 mm²
123 mm²
Board Design
TDP
580W
75W
Suggested PSU
950 W
250 W
Outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
1x DVI1x HDMI 2.0b1x DisplayPort 1.4a
Power Connectors
4x 8-pin
None
Graphics Features
DirectX
12 (12_0)
12 (12_0)
OpenGL
4.6
4.6
OpenCL
2.0
2.1
Vulkan
1.2
1.2
Shader Model
6.3
6.4