Radeon HD 6870 X2 and GeForce GTX 950M Mac Edition - video card comparison
Radeon HD 6870 X2
GeForce GTX 950M Mac Edition
Architecture
TeraScale 2 (2009−2015)
Maxwell (2014−2018)
GPU code name
Barts
GM107
Market segment
Desktop
Desktop
Release date
July 2011
March 2015
Interface
PCIe 2.0 x16
MXM-B (3.0)
Boost clock speed
-
1124 MHz
Core clock speed
900 MHz
993 MHz
Floating-point performance
2x 2,016.0 gflops
1,271 gflops
Manufacturing process technology
40 nm
28 nm
Number of transistors
1,700 million
1,870 million
Pipelines / CUDA cores
1120
640
Power consumption (TDP)
300 Watt
75 Watt
Texture fill rate
50.40
44.96
Memory type
GDDR5
DDR3
Maximum RAM amount
1 GB
2 GB
Memory bus width
256 Bit
128 Bit
Memory clock speed
4200 MHz
1800 MHz
Memory bandwidth
134.4 GB/s
28.8 GB/s
Display Connectors
2x DVI, 1x HDMI, 2x mini-DisplayPort
No outputs
HDMI
+
-
DirectX
11.2 (11_0)
12 (11_0)
CUDA
-
5.0
OpenCL
1.2
1.2
OpenGL
4.4
4.6
Shader Model
5.0
5.1
Vulkan
N/A
1.1.126