Radeon R9 270 1024SP and GeForce GT 640 OEM Rebrand - video card comparison
Radeon R9 270 1024SP
GeForce GT 640 OEM Rebrand
Architecture
GCN 1.0 (2012−2020)
Fermi 2.0 (2010−2014)
GPU code name
Pitcairn
GF116
Market segment
Desktop
Desktop
Release date
March 2015
April 2012
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
1x 6-pin
None
Boost clock speed
925 MHz
-
Core clock speed
900 MHz
720 MHz
Floating-point performance
1,894 gflops
414.7 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
2,800 million
1,170 million
Pipelines / CUDA cores
1024
144
Power consumption (TDP)
150 Watt
75 Watt
Texture fill rate
59.20
17.28
Memory type
GDDR5
DDR3
Maximum RAM amount
2 GB
1536 MB
Memory bus width
256 Bit
192 Bit
Memory clock speed
4800 MHz
1600 MHz
Memory bandwidth
153.6 GB/s
38.4 GB/s
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
2x DVI, 1x mini-HDMI
HDMI
+
+
DirectX
12 (11_1)
12 (11_0)
CUDA
-
2.1
OpenCL
1.2
1.1
OpenGL
4.6
4.6
Shader Model
5.1
5.1
Vulkan
1.2.131
N/A