Radeon R7 250 and GeForce GT 640 Rev. 2 - video card comparison
Radeon R7 250
GeForce GT 640 Rev. 2
Architecture
GCN (2011−2017)
Kepler 2.0 (2013−2015)
GPU code name
Oland XT
GK208
Market segment
Desktop
Desktop
Release date
October 2013
May 2013
Bus support
PCIe 3.0
-
Interface
PCIe 3.0 x8
PCIe 2.0 x8
Supplementary power connectors
N/A
None
Boost clock speed
1050 MHz
-
Core clock speed
-
1046 MHz
Floating-point performance
716.8 gflops
803.3 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
950 million
915 million
Pipelines / CUDA cores
384
384
Power consumption (TDP)
75 Watt
49 Watt
Texture fill rate
25.20
33.47
Memory type
DDR3, GDDR5
GDDR5
Maximum RAM amount
2 GB
1 GB
Memory bus width
128 Bit
64 Bit
Memory clock speed
1150 MHz
5008 MHz
Memory bandwidth
72 GB/s
40.06 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 1x VGA
1x DVI, 1x HDMI, 1x VGA
HDMI
+
+
DisplayPort support
-
-
DirectX
DirectX® 12
12 (11_0)
CUDA
-
3.5
Mantle
-
-
OpenCL
1.2
1.2
OpenGL
4.6
4.6
Shader Model
5.1
5.1
Vulkan
-
1.1.126
AppAcceleration
+
-
CrossFire
1
-
DDMA audio
+
-
Enduro
-
-
FreeSync
1
-
HD3D
-
-
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-