Radeon HD 6990 and GeForce GT 640 - video card comparison
Passmark - benchmark score Radeon HD 6990 vs GeForce GT 640
Radeon HD 6990
3103
GeForce GT 640
1209
Radeon HD 6990
GeForce GT 640
Architecture
TeraScale 3 (2010−2013)
Kepler (2012−2018)
GPU code name
Antilles
GK107
Market segment
Desktop
Desktop
Release date
March 2011
June 2012
Interface
PCIe 2.0 x16
PCIe 3.0 x16
Supplementary power connectors
2x 8-pin
None
Core clock speed
830 MHz
902 MHz
Floating-point performance
2x 2,549.8 gflops
692.7 gflops
Manufacturing process technology
40 nm
28 nm
Number of transistors
2,640 million
1,270 million
Pipelines / CUDA cores
1536
384
Power consumption (TDP)
375 Watt
65 Watt
Texture fill rate
79.68
28.86
Memory type
GDDR5
DDR3
Maximum RAM amount
2 GB
2 GB
Memory bus width
256 Bit
128 Bit
Memory clock speed
5000 MHz
1782 MHz
Memory bandwidth
160.0 GB/s
28.51 GB/s
Display Connectors
1x DVI, 4x mini-DisplayPort
1x DVI, 1x HDMI, 1x DisplayPort
HDMI
-
+
DirectX
11.2 (11_0)
12 (11_0)
CUDA
-
3.0
OpenCL
1.2
1.2
OpenGL
4.4
4.6
Shader Model
5.0
5.1
Vulkan
N/A
1.1.126