Radeon HD 7870 and Radeon R2 (Stoney Ridge) - video card comparison
Radeon HD 7870
Radeon R2 (Stoney Ridge)
Architecture
GCN (2011−2017)
GCN 1.2/2.0 (2015−2016)
GPU code name
Pitcairn XT
Stoney Ridge
Market segment
Desktop
Laptop
Release date
March 2012
June 2016
Interface
PCIe 3.0 x16
-
Supplementary power connectors
2x 6-pin
-
Boost clock speed
-
600 MHz
Core clock speed
1000 MHz
-
Manufacturing process technology
28 nm
28 nm
Number of transistors
2800 Million
3100 Million
Pipelines / CUDA cores
1280
128
Power consumption (TDP)
175 Watt
15 Watt
Texture fill rate
80.00
-
Memory type
GDDR5
-
Maximum RAM amount
2 GB
-
Memory bus width
256 Bit
64 Bit
Memory clock speed
4800 MHz
-
Memory bandwidth
153.6 GB/s
-
Shared memory
-
+
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
-
Eyefinity
+
-
HDMI
+
-
DirectX
12 (11_1)
12 (FL 12_0)
OpenCL
1.2
-
OpenGL
4.6
-
Shader Model
5.1
-
Vulkan
1.2.131
+