Radeon R9 270X and GeForce GTX 660 OEM - video card comparison
Radeon R9 270X
GeForce GTX 660 OEM
Architecture
GCN (2011−2017)
Kepler (2012−2018)
GPU code name
Curacao XT
GK104
Market segment
Desktop
Desktop
Release date
October 2013
August 2012
Bus support
PCIe 3.0
-
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
2 x 6-pin
1x 6-pin
Boost clock speed
1050 MHz
888 MHz
Core clock speed
-
823 MHz
Floating-point performance
2,688 gflops
2,046 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
2,800 million
3,540 million
Pipelines / CUDA cores
1280
1152
Power consumption (TDP)
180 Watt
130 Watt
Texture fill rate
84.00
85.25
Memory type
GDDR5
GDDR5
Maximum RAM amount
4 GB
2 GB
Memory bus width
256 Bit
256 Bit
Memory clock speed
-
5600 MHz
Memory bandwidth
179.2 GB/s
179.2 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
-
-