Radeon HD 6870 X2 and GeForce GTX 650 - video card comparison
Radeon HD 6870 X2
GeForce GTX 650
Architecture
TeraScale 2 (2009−2015)
Kepler (2012−2018)
GPU code name
Barts
GK107
Market segment
Desktop
Desktop
Release date
July 2011
September 2012
Bus support
-
PCI Express 3.0
Interface
PCIe 2.0 x16
PCIe 3.0 x16
Supplementary power connectors
-
One 6-pin
Core clock speed
900 MHz
1058 MHz
CUDA cores
-
384
Floating-point performance
2x 2,016.0 gflops
812.5 gflops
Manufacturing process technology
40 nm
28 nm
Number of transistors
1,700 million
1,270 million
Pipelines / CUDA cores
1120
384
Power consumption (TDP)
300 Watt
64 Watt
Texture fill rate
50.40
33.9 billion/sec
Memory type
GDDR5
GDDR5
Maximum RAM amount
1 GB
2 GB
Memory bus width
256 Bit
128-bit GDDR5
Memory clock speed
4200 MHz
5.0 GB/s
Memory bandwidth
134.4 GB/s
80.0 GB/s
Display Connectors
2x DVI, 1x HDMI, 2x mini-DisplayPort
One Dual Link DVI-I, One Dual Link DVI-D, One Mini HDMI
Multi monitor support
-
4 displays
HDMI
+
+
HDCP
-
+
Maximum VGA resolution
-
2048x1536
Audio input for HDMI
-
Internal
DirectX
11.2 (11_0)
12 (11_0)
CUDA
-
+
OpenCL
1.2
1.2
OpenGL
4.4
4.3
Shader Model
5.0
5.1
Vulkan
N/A
1.1.126
3D Blu-Ray
-
+
3D Gaming
-
+
3D Vision
-
+