GeForce 800A and Radeon HD 4855 - video card comparison
GeForce 800A
Radeon HD 4855
Architecture
Fermi 2.0 (2010−2014)
TeraScale (2005−2013)
GPU code name
GF119
RV770
Market segment
Desktop
Desktop
Release date
March 2014
January 2010
Interface
PCIe 2.0 x16
PCIe 2.0 x16
Supplementary power connectors
-
1x 6-pin
Core clock speed
475 MHz
575 MHz
Floating-point performance
141.7 gflops
736.0 gflops
Manufacturing process technology
40 nm
55 nm
Number of transistors
292 million
956 million
Pipelines / CUDA cores
48
640
Power consumption (TDP)
15 Watt
110 Watt
Texture fill rate
3.800
18.40
Memory type
DDR3
GDDR5
Maximum RAM amount
1 GB
512 MB
Memory bus width
64 Bit
256 Bit
Memory clock speed
1800 MHz
3600 MHz
Memory bandwidth
14.4 GB/s
115.2 GB/s
Display Connectors
No outputs
1x DVI, 1x HDMI, 1x VGA
HDMI
-
+
DirectX
12 (11_0)
10.1 (10_1)
CUDA
2.1
-
OpenCL
1.1
1.1
OpenGL
4.6
3.3
Shader Model
5.1
4.1
Vulkan
N/A
N/A