Radeon R9 280X and GeForce GTX 660 Rev. 2 - video card comparison
Radeon R9 280X
GeForce GTX 660 Rev. 2
Architecture
GCN (2011−2017)
Kepler (2012−2018)
GPU code name
Thaiti XTL
GK104
Market segment
Desktop
Desktop
Release date
October 2013
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
1x 6-pin
Boost clock speed
1000 MHz
1032 MHz
Core clock speed
-
980 MHz
Floating-point performance
4,096 gflops
1,981 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
4,313 million
3,540 million
Pipelines / CUDA cores
2048
960
Power consumption (TDP)
250 Watt
140 Watt
Texture fill rate
128.0
82.56
Memory type
GDDR5
GDDR5
Maximum RAM amount
3 GB
2 GB
Memory bus width
384 Bit
192 Bit
Memory clock speed
-
6008 MHz
Memory bandwidth
288 GB/s
144.2 GB/s
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
2x DVI, 1x HDMI, 1x DisplayPort
Eyefinity
+
-
HDMI
+
+
DisplayPort support
+
-
DirectX
DirectX® 12
12 (11_0)
CUDA
-
3.0
Mantle
-
-
OpenCL
1.2
1.2
OpenGL
4.6
4.6
Shader Model
5.1
5.1
Vulkan
+
1.1.126
AppAcceleration
+
-
CrossFire
1
-
DDMA audio
+
-
Enduro
-
-
FreeSync
1
-
HD3D
+
-
LiquidVR
1
-
PowerTune
-
-
TressFX
1
-
TrueAudio
+
-
UVD
+
-
ZeroCore
-
-