Radeon R9 280 and Radeon R9 285 - video card comparison
Passmark - benchmark score Radeon R9 280 vs Radeon R9 285
Radeon R9 280
5726
Radeon R9 285
6880
Radeon R9 280
Radeon R9 285
Architecture
GCN 1.0 (2012−2020)
GCN 3.0 (2014−2017)
GPU code name
Tahiti
Tonga
Market segment
Desktop
Desktop
Release date
March 2014
September 2014
Bus support
PCIe 3.0
-
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
1 x 6-pin + 1 x 8-pin
2x 6-pin
Boost clock speed
933 MHz
-
Core clock speed
-
918 MHz
Floating-point performance
3,344 gflops
3,290 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
4,313 million
5,000 million
Pipelines / CUDA cores
1792
1792
Power consumption (TDP)
200 Watt
190 Watt
Texture fill rate
104.5
102.8
Memory type
GDDR5
GDDR5
Maximum RAM amount
3 GB
2 GB
Memory bus width
384 Bit
256 Bit
Memory clock speed
1250 MHz
5.5 GB/s
Memory bandwidth
240 GB/s
176.0 GB/s
Display Connectors
2x DVI, 1x HDMI, 2x mini-DisplayPort
2x DVI, 1x HDMI 1.4a, 1x DisplayPort 1.2
Eyefinity
1
-
HDMI
+
+
DisplayPort support
-
-
DirectX
DirectX® 12
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
-
DDMA audio
+
-
Enduro
-
-
FreeSync
1
-
HD3D
+
-
LiquidVR
1
-
PowerTune
-
-
TressFX
1
-
TrueAudio
+
-
UVD
+
-
ZeroCore
-
-