Radeon HD 4870 and GeForce GT 420 OEM - video card comparison
Radeon HD 4870
GeForce GT 420 OEM
Architecture
TeraScale (2005−2013)
Fermi (2010−2014)
GPU code name
RV770
GF108
Market segment
Desktop
Desktop
Release date
June 2008
September 2010
Interface
PCIe 2.0 x16
PCIe 2.0 x16
Supplementary power connectors
2x 6-pin
None
Core clock speed
750 MHz
700 MHz
Floating-point performance
1,200.0 gflops
134.4 gflops
Manufacturing process technology
55 nm
40 nm
Number of transistors
956 million
585 million
Pipelines / CUDA cores
800
48
Power consumption (TDP)
150 Watt
50 Watt
Texture fill rate
30.00
2.800
Memory type
GDDR5
DDR3
Maximum RAM amount
1 GB
1 GB
Memory bus width
256 Bit
128 Bit
Memory clock speed
3600 MHz
1800 MHz
Memory bandwidth
115.2 GB/s
28.8 GB/s
Display Connectors
2x DVI, 1x S-Video
1x DVI, 1x HDMI, 1x VGA
HDMI
-
+
DirectX
10.1 (10_1)
12 (11_0)
CUDA
-
2.1
OpenCL
1.1
1.1
OpenGL
3.3
4.6
Shader Model
4.1
5.1
Vulkan
N/A
N/A