AMD Radeon R9 285 vs AMD Radeon RX 640 Mobile
GPU Specs Compare
Graphics Card
Release Date
Sep 2014
May 2019
Generation
Volcanic Islands
Mobility Radeon
Type
Desktop
Mobile
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x8
Clock Speeds
Memory Clock
1375 MHz
1500 MHz
Base Clock
-
1082 MHz
Boost Clock
-
1218 MHz
Memory
Memory Size
2GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
64bit
Bandwidth
176.0GB/s
48.00GB/s
Render Config
Compute Units
28
10
Shading Units
1792
640
TMUs
112
40
ROPs
32
16
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
512 KB
512 KB
Theoretical Performance
Pixel Rate
29.38 GPixel/s
19.49 GPixel/s
Texture Rate
102.8 GTexel/s
48.72 GTexel/s
FP16 (half)
3.290 TFLOPS
1.559 TFLOPS
FP32 (float)
3.290 TFLOPS
1.559 TFLOPS
FP64 (double)
205.6 GFLOPS
97.44 GFLOPS
Graphics Processor
GPU Name
Tonga
Polaris 23
GPU Variant
Tonga PRO(215-0851128)
Polaris 23 XT
Architecture
GCN 3.0
GCN 4.0
Foundry
TSMC
GlobalFoundries
Process Size
28 nm
14 nm
Transistors
5 billion
2.2 billion
Die Size
366 mm²
103 mm²
Board Design
TDP
190W
50W
Suggested PSU
450 W
-
Outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
No outputs
Power Connectors
2x 6-pin
None
Graphics Features
DirectX
12 (12_0)
12 (12_0)
OpenGL
4.6
4.6
OpenCL
2.1
2.1
Vulkan
1.2.170
1.2
Shader Model
6.5
6.4