AMD Radeon HD 6870 X2 vs AMD Radeon R9 M395 Mac Edition
GPU · Specs Compare
Graphics Card
Release Date
Jul 2011
May 2015
Generation
Northern Islands
Crystal System
Type
Desktop
Mobile
Bus Interface
PCIe 2.0 x16
MXM-B (3.0)
Clock Speeds
Memory Clock
1050 MHz
1365 MHz
Memory
Memory Size
1024MB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
256bit
Bandwidth
134.4GB/s
174.7GB/s
Render Config
Compute Units
14
28
Shading Units
1120
1792
TMUs
56
112
ROPs
32
32
L1 Cache
8 KB (per CU)
—
L2 Cache
512 KB
—
Theoretical Performance
Pixel Rate
28.80 GPixel/s
26.69 GPixel/s
Texture Rate
50.40 GTexel/s
93.41 GTexel/s
FP32 (float)
2.016 TFLOPS
2.989 TFLOPS
FP64 (double)
—
373.6 GFLOPS
Graphics Processor
GPU Name
Barts
Amethyst
GPU Variant
Barts XT(215-0798000)
Amethyst PRO(216-0872004)
Architecture
TeraScale 2
GCN 3.0
Foundry
TSMC
TSMC
Process Size
40 nm
28 nm
Transistors
1.7 billion
5 billion
Die Size
255 mm²
366 mm²
Board Design
TDP
300W
250W
Suggested PSU
700 W
—
Outputs
2x DVI1x HDMI 1.3a2x mini-DisplayPort 1.1
No outputs
Power Connectors
—
None
Graphics Features
DirectX
11.2 (11_0)
12 (12_0)
OpenGL
4.4
4.6
OpenCL
1.2
2.0
Vulkan
N/A
1.2
Shader Model
5.0
6.3
▲ Specs Compare
Data sourced from official specifications and benchmark tests.