Radeon HD 7970 and Radeon R9 285X - video card comparison
Radeon HD 7970
Radeon R9 285X
Architecture
GCN (2011−2017)
GCN 3.0 (2014−2017)
GPU code name
Tahiti XT
Tonga
Market segment
Desktop
Desktop
Release date
December 2011
-
Bus support
PCIe 2.1 x16
-
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
1x 6-pin + 1x 8-pin
1x 6-pin + 1x 8-pin
Boost clock speed
925 MHz
-
Core clock speed
-
1002 MHz
Floating-point performance
3,789 gflops
-
Manufacturing process technology
28 nm
28 nm
Number of transistors
4,313 million
5,000 million
Pipelines / CUDA cores
2048
2048
Power consumption (TDP)
300 Watt
200 Watt
Texture fill rate
118.4
128.3
Memory type
GDDR5
GDDR5
Maximum RAM amount
6 GB
3 GB
Memory bus width
384 Bit
384 Bit
Memory clock speed
1375 MHz
5.5 GB/s
Memory bandwidth
264 GB/s
264.0 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
2x DVI, 1x HDMI 1.4a, 1x DisplayPort 1.2
Eyefinity
+
-
HDMI
+
+
DisplayPort support
-
-
DirectX
DirectX® 11
12 (12_0)
Mantle
-
-
OpenCL
1.2
2.1
OpenGL
4.6
4.6
Shader Model
5.1
6.5
Vulkan
-
1.2.170
AppAcceleration
-
-
CrossFire
1
-
Enduro
-
-
FreeSync
1
-
HD3D
-
-
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-