Radeon R9 270X and GeForce GTX 660M - video card comparison
Passmark - benchmark score Radeon R9 270X vs GeForce GTX 660M
Radeon R9 270X
5036
GeForce GTX 660M
1478
Radeon R9 270X
GeForce GTX 660M
Architecture
GCN (2011−2017)
Kepler (2012−2018)
GPU code name
Curacao XT
N13E-GE
Market segment
Desktop
Laptop
Release date
October 2013
March 2012
Bus support
PCIe 3.0
PCI Express 2.0, PCI Express 3.0
Interface
PCIe 3.0 x16
MXM-B (3.0)
Supplementary power connectors
2 x 6-pin
-
SLI options
-
+
Boost clock speed
1050 MHz
950 MHz
Core clock speed
-
835 MHz
CUDA cores
-
384
Floating-point performance
2,688 gflops
729.6 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
2,800 million
1,270 million
Pipelines / CUDA cores
1280
384
Power consumption (TDP)
180 Watt
50 Watt
Texture fill rate
84.00
30.4 billion/sec
Memory type
GDDR5
GDDR5
Maximum RAM amount
4 GB
2 GB
Memory bus width
256 Bit
128bit
Memory clock speed
-
2000 MHz
Memory bandwidth
179.2 GB/s
64.0 GB/s
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
No outputs
Eyefinity
+
-
HDMI
+
+
HDCP
-
+
Maximum VGA resolution
-
Up to 2048x1536
DisplayPort support
+
-
DirectX
DirectX® 12
12 API
CUDA
-
+
Mantle
-
-
OpenCL
1.2
1.1
OpenGL
4.6
4.5
Shader Model
5.1
5.1
Vulkan
+
1.1.126
AppAcceleration
+
-
CrossFire
1
-
DDMA audio
+
-
Enduro
-
-
FreeSync
1
-
HD3D
+
-
LiquidVR
1
-
Optimus
-
+
PowerTune
-
-
TressFX
1
-
TrueAudio
+
-
UVD
+
-
ZeroCore
-
-