Radeon R9 285 and Radeon HD 7970 X2 - video card comparison
Radeon R9 285
Radeon HD 7970 X2
Architecture
GCN 3.0 (2014−2017)
GCN 1.0 (2012−2020)
GPU code name
Tonga
New Zealand
Market segment
Desktop
Desktop
Release date
September 2014
August 2012
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
2x 6-pin
3x 8-pin
Core clock speed
918 MHz
925 MHz
Floating-point performance
3,290 gflops
2x 3,789 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
5,000 million
4,313 million
Pipelines / CUDA cores
1792
2048
Power consumption (TDP)
190 Watt
500 Watt
Texture fill rate
102.8
118.4
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
3 GB
Memory bus width
256 Bit
384 Bit
Memory clock speed
5.5 GB/s
5500 MHz
Memory bandwidth
176.0 GB/s
264.0 GB/s
Display Connectors
2x DVI, 1x HDMI 1.4a, 1x DisplayPort 1.2
1x DVI, 4x mini-DisplayPort
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