AMD Radeon RX 580X Mobile vs AMD Radeon HD 6850 X2
GPU · Specs Compare
Graphics Card
Release Date
Apr 2018
Sep 2011
Generation
Mobility Radeon
Northern Islands
Type
Mobile
Desktop
Bus Interface
MXM-B (3.0)
PCIe 2.0 x16
Clock Speeds
Base Clock
1000 MHz
—
Boost Clock
1077 MHz
—
Memory Clock
2000 MHz
1050 MHz
Memory
Memory Size
8GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
256bit
Bandwidth
256.0GB/s
134.4GB/s
Render Config
Compute Units
36
12
Shading Units
2304
960
TMUs
144
48
ROPs
32
32
L1 Cache
16 KB (per CU)
8 KB (per CU)
L2 Cache
2 MB
512 KB
Theoretical Performance
Pixel Rate
34.46 GPixel/s
25.60 GPixel/s
Texture Rate
155.1 GTexel/s
38.40 GTexel/s
FP16 (half)
4.963 TFLOPS
—
FP32 (float)
4.963 TFLOPS
1.536 TFLOPS
FP64 (double)
310.2 GFLOPS
—
Graphics Processor
GPU Name
Polaris 20
Barts
GPU Variant
Polaris 20M XT
Barts PRO(215-0798006)
Architecture
GCN 4.0
TeraScale 2
Foundry
GlobalFoundries
TSMC
Process Size
14 nm
40 nm
Transistors
5.7 billion
1.7 billion
Die Size
232 mm²
255 mm²
Board Design
TDP
100W
254W
Outputs
No outputs
2x DVI1x HDMI 1.3a1x DisplayPort 1.1
Power Connectors
None
2x 8-pin
Suggested PSU
—
600 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
▲ Specs Compare
Data sourced from official specifications and benchmark tests.