Radeon R9 285 and Radeon HD 6990 - video card comparison
Passmark - benchmark score Radeon R9 285 vs Radeon HD 6990
Radeon R9 285
6880
Radeon HD 6990
3103
Radeon R9 285
Radeon HD 6990
Architecture
GCN 3.0 (2014−2017)
TeraScale 3 (2010−2013)
GPU code name
Tonga
Antilles
Market segment
Desktop
Desktop
Release date
September 2014
March 2011
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
2x 6-pin
2x 8-pin
Core clock speed
918 MHz
830 MHz
Floating-point performance
3,290 gflops
2x 2,549.8 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
5,000 million
2,640 million
Pipelines / CUDA cores
1792
1536
Power consumption (TDP)
190 Watt
375 Watt
Texture fill rate
102.8
79.68
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
5000 MHz
Memory bandwidth
176.0 GB/s
160.0 GB/s
Display Connectors
2x DVI, 1x HDMI 1.4a, 1x DisplayPort 1.2
1x DVI, 4x mini-DisplayPort
HDMI
+
-
DirectX
12 (12_0)
11.2 (11_0)
OpenCL
2.1
1.2
OpenGL
4.6
4.4
Shader Model
6.5
5.0
Vulkan
1.2.170
N/A