Radeon HD 4550 and Radeon HD 6390 - video card comparison
Radeon HD 4550
Radeon HD 6390
Architecture
TeraScale (2005−2013)
TeraScale 2 (2009−2015)
GPU code name
RV710
Redwood
Market segment
Desktop
Desktop
Release date
September 2008
July 2011
Interface
PCIe 2.0 x16
PCIe 2.0 x16
Supplementary power connectors
None
None
Core clock speed
600 MHz
550 MHz
Floating-point performance
96 gflops
352.0 gflops
Manufacturing process technology
55 nm
40 nm
Number of transistors
242 million
627 million
Pipelines / CUDA cores
80
320
Power consumption (TDP)
25 Watt
39 Watt
Texture fill rate
4.800
8.800
Memory type
DDR2
DDR2
Maximum RAM amount
256 MB
1 GB
Memory bus width
64 Bit
128 Bit
Memory clock speed
1310 MHz
1000 MHz
Memory bandwidth
10.48 GB/s
16 GB/s
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
1x DVI, 1x HDMI, 1x VGA
HDMI
+
+
DirectX
10.1 (10_1)
11.2 (11_0)
OpenCL
1.1
1.2
OpenGL
3.3
4.4
Shader Model
4.1
5.0
Vulkan
N/A
N/A