AMD Radeon RX 640 Mobile vs AMD Radeon HD 6850 1440SP Edition
GPU Specs Compare
Graphics Card
Release Date
May 2019
Aug 2012
Generation
Mobility Radeon
Northern Islands
Type
Mobile
Desktop
Bus Interface
PCIe 3.0 x8
PCIe 2.0 x16
Clock Speeds
Base Clock
1082 MHz
-
Boost Clock
1218 MHz
-
Memory Clock
1500 MHz
1000 MHz
Memory
Memory Size
2GB
1024MB
Memory Type
GDDR5
GDDR5
Memory Bus
64bit
256bit
Bandwidth
48.00GB/s
128.0GB/s
Render Config
Compute Units
10
18
Shading Units
640
1440
TMUs
40
72
ROPs
16
32
L1 Cache
16 KB (per CU)
8 KB (per CU)
L2 Cache
512 KB
512 KB
Theoretical Performance
Pixel Rate
19.49 GPixel/s
23.20 GPixel/s
Texture Rate
48.72 GTexel/s
52.20 GTexel/s
FP16 (half)
1.559 TFLOPS
-
FP32 (float)
1.559 TFLOPS
2.088 TFLOPS
FP64 (double)
97.44 GFLOPS
417.6 GFLOPS
Graphics Processor
GPU Name
Polaris 23
Cypress
GPU Variant
Polaris 23 XT
Cypress PRO(215-0735043)
Architecture
GCN 4.0
TeraScale 2
Foundry
GlobalFoundries
TSMC
Process Size
14 nm
40 nm
Transistors
2.2 billion
2.154 billion
Die Size
103 mm²
334 mm²
Board Design
TDP
50W
151W
Outputs
No outputs
2x DVI1x HDMI 1.3a1x DisplayPort 1.1
Power Connectors
None
2x 6-pin
Suggested PSU
-
450 W
Graphics Features
DirectX
12 (12_0)
11.2 (11_0)
OpenGL
4.6
4.4
OpenCL
2.1
1.2
Vulkan
1.2
N/A
Shader Model
6.4
5.0