Radeon R9 285 and Radeon R9 280X - video card comparison
Passmark - benchmark score Radeon R9 285 vs Radeon R9 280X
Radeon R9 285
6880
Radeon R9 280X
6012
Radeon R9 285
Radeon R9 280X
Architecture
GCN 3.0 (2014−2017)
GCN (2011−2017)
GPU code name
Tonga
Thaiti XTL
Market segment
Desktop
Desktop
Release date
September 2014
October 2013
Bus support
-
PCIe 3.0
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
2x 6-pin
1 x 6-pin + 1 x 8-pin
Boost clock speed
-
1000 MHz
Core clock speed
918 MHz
-
Floating-point performance
3,290 gflops
4,096 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
128.0
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
-
Memory bandwidth
176.0 GB/s
288 GB/s
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI 1.4a, 1x DisplayPort 1.2
2x DVI, 1x HDMI, 1x DisplayPort
Eyefinity
-
+
HDMI
+
+
DisplayPort support
-
+
DirectX
12 (12_0)
DirectX® 12
Mantle
-
-
OpenCL
2.1
1.2
OpenGL
4.6
4.6
Shader Model
6.5
5.1
Vulkan
1.2.170
+
AppAcceleration
-
+
CrossFire
-
1
DDMA audio
-
+
Enduro
-
-
FreeSync
-
1
HD3D
-
+
LiquidVR
-
1
PowerTune
-
-
TressFX
-
1
TrueAudio
-
+
UVD
-
+
ZeroCore
-
-