Radeon Sky 900 and Radeon R9 285X - video card comparison
Radeon Sky 900
Radeon R9 285X
Architecture
GCN 1.0 (2012−2020)
GCN 3.0 (2014−2017)
GPU code name
Tahiti
Tonga
Market segment
Desktop
Desktop
Release date
March 2013
-
Bus support
PCIe 3.0
-
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
2x 8-pin
1x 6-pin + 1x 8-pin
Boost clock speed
950 MHz
-
Core clock speed
825 MHz
1002 MHz
Floating-point performance
2x 3,405 gflops
-
Manufacturing process technology
28 nm
28 nm
Number of transistors
4,313 million
5,000 million
Pipelines / CUDA cores
3584
2048
Power consumption (TDP)
300 Watt
200 Watt
Texture fill rate
106.4
128.3
Memory type
GDDR5
GDDR5
Maximum RAM amount
6 GB
3 GB
Memory bus width
384 Bit
384 Bit
Memory clock speed
5000 MHz
5.5 GB/s
Memory bandwidth
480 GB/s
264.0 GB/s
Display Connectors
1x DVI, 1x mini-DisplayPort
2x DVI, 1x HDMI 1.4a, 1x DisplayPort 1.2
Dual-link DVI support
1
-
HDMI
-
+
DirectX
12 (11_1)
12 (12_0)
OpenCL
1.2
2.1
OpenGL
4.6
4.6
Shader Model
5.1
6.5
Vulkan
1.2.131
1.2.170