Radeon HD 7870 and Radeon R2 Graphics - video card comparison
Radeon HD 7870
Radeon R2 Graphics
Architecture
GCN (2011−2017)
GCN 2.0 (2013−2017)
GPU code name
Pitcairn XT
Beema
Market segment
Desktop
Desktop
Release date
March 2012
February 2015
Interface
PCIe 3.0 x16
IGP
Supplementary power connectors
2x 6-pin
-
Core clock speed
1000 MHz
351 MHz
Floating-point performance
-
179.2 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
2800 Million
930 million
Pipelines / CUDA cores
1280
128
Power consumption (TDP)
175 Watt
15 Watt
Texture fill rate
80.00
2.808
Memory type
GDDR5
System Shared
Maximum RAM amount
2 GB
System Shared
Memory bus width
256 Bit
System Shared
Memory clock speed
4800 MHz
System Shared
Memory bandwidth
153.6 GB/s
-
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
No outputs
Eyefinity
+
-
HDMI
+
-
DirectX
12 (11_1)
12 (12_0)
OpenCL
1.2
2.0
OpenGL
4.6
4.6
Shader Model
5.1
6.3
Vulkan
1.2.131
1.2.131