Radeon HD 5770 and GeForce GT 640 OEM Rebrand - video card comparison
Radeon HD 5770
GeForce GT 640 OEM Rebrand
Architecture
Terascale 2 (2009−2015)
Fermi 2.0 (2010−2014)
GPU code name
Juniper
GF116
Market segment
Desktop
Desktop
Release date
October 2009
April 2012
Interface
PCIe 2.0 x16
PCIe 2.0 x16
Supplementary power connectors
1x 6-pin
None
Core clock speed
850 MHz
720 MHz
Floating-point performance
1,360.0 gflops
414.7 gflops
Manufacturing process technology
40 nm
40 nm
Number of transistors
1,040 million
1,170 million
Pipelines / CUDA cores
800
144
Power consumption (TDP)
108 Watt
75 Watt
Texture fill rate
34.00
17.28
Memory type
GDDR5
DDR3
Maximum RAM amount
1 GB
1536 MB
Memory bus width
128 Bit
192 Bit
Memory clock speed
4800 MHz
1600 MHz
Memory bandwidth
76.8 GB/s
38.4 GB/s
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
2x DVI, 1x mini-HDMI
HDMI
+
+
DirectX
11.2 (11_0)
12 (11_0)
CUDA
-
2.1
OpenCL
1.2
1.1
OpenGL
4.4
4.6
Shader Model
5.0
5.1
Vulkan
N/A
N/A