Radeon R9 285 and Radeon HD 7970 GHz Edition - video card comparison
Radeon R9 285
Radeon HD 7970 GHz Edition
Architecture
GCN 3.0 (2014−2017)
GCN 1.0 (2012−2020)
GPU code name
Tonga
Tahiti
Market segment
Desktop
Desktop
Release date
September 2014
June 2012
Bus support
-
PCIe 2.1 x16
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
2x 6-pin
1x 6-pin + 1x 8-pin
Boost clock speed
-
1050 MHz
Core clock speed
918 MHz
-
Floating-point performance
3,290 gflops
4,301 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
250 Watt
Texture fill rate
102.8
134.4
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
1500 MHz
Memory bandwidth
176.0 GB/s
288 GB/s
Display Connectors
2x DVI, 1x HDMI 1.4a, 1x DisplayPort 1.2
1x DVI, 1x HDMI, 2x mini-DisplayPort
Eyefinity
-
1
HDMI
+
+
DisplayPort support
-
-
DirectX
12 (12_0)
DirectX® 11
Mantle
-
-
OpenCL
2.1
1.2
OpenGL
4.6
4.6
Shader Model
6.5
5.1
Vulkan
1.2.170
-
AppAcceleration
-
-
CrossFire
-
1
Enduro
-
-
FreeSync
-
1
HD3D
-
-
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-