Radeon HD 7870 and Mobility Radeon HD 4550 - video card comparison
Radeon HD 7870
Mobility Radeon HD 4550
Architecture
GCN (2011−2017)
Terascale 1 (2008−2010)
GPU code name
Pitcairn XT
M92
Market segment
Desktop
Laptop
Release date
March 2012
January 2010
Interface
PCIe 3.0 x16
MXM-II
Supplementary power connectors
2x 6-pin
None
Core clock speed
1000 MHz
550 MHz
Floating-point performance
-
88 gflops
Manufacturing process technology
28 nm
55 nm
Number of transistors
2800 Million
242 million
Pipelines / CUDA cores
1280
80
Power consumption (TDP)
175 Watt
-
Texture fill rate
80.00
4.400
Memory type
GDDR5
GDDR3, DDR2, DDR3
Maximum RAM amount
2 GB
512 MB
Memory bus width
256 Bit
64 Bit
Memory clock speed
4800 MHz
700 MHz
Memory bandwidth
153.6 GB/s
11.2 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
No outputs
Eyefinity
+
-
HDMI
+
-
DirectX
12 (11_1)
10.1 (10_1)
OpenCL
1.2
1.1
OpenGL
4.6
3.3
Shader Model
5.1
4.1
Vulkan
1.2.131
N/A