Radeon R9 285 and Radeon HD 7870 - video card comparison
Passmark - benchmark score Radeon R9 285 vs Radeon HD 7870
Radeon R9 285
6880
Radeon HD 7870
4779
Radeon R9 285
Radeon HD 7870
Architecture
GCN 3.0 (2014−2017)
GCN (2011−2017)
GPU code name
Tonga
Pitcairn XT
Market segment
Desktop
Desktop
Release date
September 2014
March 2012
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
2x 6-pin
2x 6-pin
Core clock speed
918 MHz
1000 MHz
Floating-point performance
3,290 gflops
-
Manufacturing process technology
28 nm
28 nm
Number of transistors
5,000 million
2800 Million
Pipelines / CUDA cores
1792
1280
Power consumption (TDP)
190 Watt
175 Watt
Texture fill rate
102.8
80.00
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
2 GB
Memory bus width
256 Bit
256 Bit
Memory clock speed
5.5 GB/s
4800 MHz
Memory bandwidth
176.0 GB/s
153.6 GB/s
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI 1.4a, 1x DisplayPort 1.2
1x DVI, 1x HDMI, 2x mini-DisplayPort
Eyefinity
-
+
HDMI
+
+
DirectX
12 (12_0)
12 (11_1)
OpenCL
2.1
1.2
OpenGL
4.6
4.6
Shader Model
6.5
5.1
Vulkan
1.2.170
1.2.131