GeForce GT 640 and Radeon R7 (Carrizo) - video card comparison
GeForce GT 640
Radeon R7 (Carrizo)
Architecture
Kepler (2012−2018)
GCN 1.2/2.0 (2015−2016)
GPU code name
GK107
Carrizo
Market segment
Desktop
Laptop
Release date
June 2012
June 2015
Interface
PCIe 3.0 x16
-
Supplementary power connectors
None
-
Boost clock speed
-
800 MHz
Core clock speed
902 MHz
-
Floating-point performance
692.7 gflops
-
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,270 million
2410 Million
Pipelines / CUDA cores
384
512
Power consumption (TDP)
65 Watt
12-35 Watt
Texture fill rate
28.86
-
Memory type
DDR3
-
Maximum RAM amount
2 GB
-
Memory bus width
128 Bit
64/128 Bit
Memory clock speed
1782 MHz
-
Memory bandwidth
28.51 GB/s
-
Shared memory
-
+
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
-
HDMI
+
-
DirectX
12 (11_0)
12 (FL 12_0)
CUDA
3.0
-
OpenCL
1.2
-
OpenGL
4.6
-
Shader Model
5.1
-
Vulkan
1.1.126
-