Radeon R7 250E and GeForce GT 640M Mac Edition - video card comparison
Radeon R7 250E
GeForce GT 640M Mac Edition
Architecture
GCN 1.0 (2012−2020)
Kepler (2012−2018)
GPU code name
Cape Verde
GK107
Market segment
Desktop
Desktop
Release date
December 2013
February 2013
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
None
-
Core clock speed
800 MHz
745 MHz
Floating-point performance
819.2 gflops
572.2 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,500 million
1,270 million
Pipelines / CUDA cores
512
384
Power consumption (TDP)
55 Watt
32 Watt
Texture fill rate
25.60
23.84
Memory type
GDDR5
GDDR5
Maximum RAM amount
1 GB
512 MB
Memory bus width
128 Bit
64 Bit
Memory clock speed
4500 MHz
5000 MHz
Memory bandwidth
72 GB/s
40 GB/s
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
No outputs
HDMI
+
-
DirectX
12 (11_1)
12 (11_0)
CUDA
-
3.0
OpenCL
1.2
1.2
OpenGL
4.6
4.6
Shader Model
5.1
5.1
Vulkan
1.2.131
1.1.126