Radeon HD 6870 X2 and GeForce GTX 1080 11Gbps - video card comparison
Radeon HD 6870 X2
GeForce GTX 1080 11Gbps
Architecture
TeraScale 2 (2009−2015)
Pascal (2016−2021)
GPU code name
Barts
GP104
Market segment
Desktop
Desktop
Release date
July 2011
April 2017
Interface
PCIe 2.0 x16
PCIe 3.0 x16
Supplementary power connectors
-
1x 8-pin
Boost clock speed
-
1733 MHz
Core clock speed
900 MHz
1607 MHz
Floating-point performance
2x 2,016.0 gflops
8,873 gflops
Manufacturing process technology
40 nm
16 nm
Number of transistors
1,700 million
7,200 million
Pipelines / CUDA cores
1120
2560
Power consumption (TDP)
300 Watt
180 Watt
Texture fill rate
50.40
277.3
Memory type
GDDR5
GDDR5X
Maximum RAM amount
1 GB
8 GB
Memory bus width
256 Bit
256 Bit
Memory clock speed
4200 MHz
11008 MHz
Memory bandwidth
134.4 GB/s
352.3 GB/s
Display Connectors
2x DVI, 1x HDMI, 2x mini-DisplayPort
1x DVI, 1x HDMI, 3x DisplayPort
HDMI
+
+
DirectX
11.2 (11_0)
12 (12_1)
CUDA
-
6.1
OpenCL
1.2
1.2
OpenGL
4.4
4.6
Shader Model
5.0
6.4
Vulkan
N/A
1.2.131