GeForce GTX 1080 11Gbps and Radeon HD 4855 - video card comparison
GeForce GTX 1080 11Gbps
Radeon HD 4855
Architecture
Pascal (2016−2021)
TeraScale (2005−2013)
GPU code name
GP104
RV770
Market segment
Desktop
Desktop
Release date
April 2017
January 2010
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
1x 8-pin
1x 6-pin
Boost clock speed
1733 MHz
-
Core clock speed
1607 MHz
575 MHz
Floating-point performance
8,873 gflops
736.0 gflops
Manufacturing process technology
16 nm
55 nm
Number of transistors
7,200 million
956 million
Pipelines / CUDA cores
2560
640
Power consumption (TDP)
180 Watt
110 Watt
Texture fill rate
277.3
18.40
Memory type
GDDR5X
GDDR5
Maximum RAM amount
8 GB
512 MB
Memory bus width
256 Bit
256 Bit
Memory clock speed
11008 MHz
3600 MHz
Memory bandwidth
352.3 GB/s
115.2 GB/s
Display Connectors
1x DVI, 1x HDMI, 3x DisplayPort
1x DVI, 1x HDMI, 1x VGA
HDMI
+
+
DirectX
12 (12_1)
10.1 (10_1)
CUDA
6.1
-
OpenCL
1.2
1.1
OpenGL
4.6
3.3
Shader Model
6.4
4.1
Vulkan
1.2.131
N/A