AMD Radeon R9 390X vs AMD Radeon RX 640 Mobile
GPU · Specs Compare
Graphics Card
Release Date
Jun 2015
May 2019
Generation
Pirate Islands
Mobility Radeon
Type
Desktop
Mobile
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x8
Clock Speeds
Memory Clock
1500 MHz
1500 MHz
Base Clock
—
1082 MHz
Boost Clock
—
1218 MHz
Memory
Memory Size
8GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
512bit
64bit
Bandwidth
384.0GB/s
48.00GB/s
Render Config
Compute Units
44
10
Shading Units
2816
640
TMUs
176
40
ROPs
64
16
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
1024 KB
512 KB
Theoretical Performance
Pixel Rate
67.20 GPixel/s
19.49 GPixel/s
Texture Rate
184.8 GTexel/s
48.72 GTexel/s
FP32 (float)
5.914 TFLOPS
1.559 TFLOPS
FP64 (double)
739.2 GFLOPS
97.44 GFLOPS
FP16 (half)
—
1.559 TFLOPS
Graphics Processor
GPU Name
Grenada
Polaris 23
GPU Variant
Grenada XT(215-0880004)
Polaris 23 XT
Architecture
GCN 2.0
GCN 4.0
Foundry
TSMC
GlobalFoundries
Process Size
28 nm
14 nm
Transistors
6.2 billion
2.2 billion
Die Size
438 mm²
103 mm²
Board Design
TDP
275W
50W
Suggested PSU
600 W
—
Outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
No outputs
Power Connectors
1x 6-pin + 1x 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
▲ Specs Compare
Data sourced from official specifications and benchmark tests.