Radeon HD 7970 X2 and Radeon HD 6490 - video card comparison
Radeon HD 7970 X2
Radeon HD 6490
Architecture
GCN 1.0 (2012−2020)
TeraScale 2 (2009−2015)
GPU code name
New Zealand
Redwood
Market segment
Desktop
Desktop
Release date
August 2012
July 2011
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
3x 8-pin
None
Core clock speed
925 MHz
550 MHz
Floating-point performance
2x 3,789 gflops
352.0 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
4,313 million
627 million
Pipelines / CUDA cores
2048
320
Power consumption (TDP)
500 Watt
39 Watt
Texture fill rate
118.4
8.800
Memory type
GDDR5
DDR2
Maximum RAM amount
3 GB
1 GB
Memory bus width
384 Bit
128 Bit
Memory clock speed
5500 MHz
1000 MHz
Memory bandwidth
264.0 GB/s
16 GB/s
Display Connectors
1x DVI, 4x mini-DisplayPort
1x DVI, 1x HDMI, 1x VGA
HDMI
-
+
DirectX
12 (11_1)
11.2 (11_0)
OpenCL
1.2
1.2
OpenGL
4.6
4.4
Shader Model
5.1
5.0
Vulkan
1.2.131
N/A