GeForce GTX 660 OEM and Radeon R9 M275X - video card comparison
GeForce GTX 660 OEM
Radeon R9 M275X
Architecture
Kepler (2012−2018)
GCN 1.0 (2012−2020)
GPU code name
GK104
Venus
Market segment
Desktop
Desktop
Release date
August 2012
January 2014
Bus support
-
PCIe 3.0 x16
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
1x 6-pin
-
Boost clock speed
888 MHz
925 MHz
Compute units
-
10
Core clock speed
823 MHz
900 MHz
Floating-point performance
2,046 gflops
1,184 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
3,540 million
1,500 million
Pipelines / CUDA cores
1152
640
Power consumption (TDP)
130 Watt
-
Texture fill rate
85.25
37.00
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
4 GB
Memory bus width
256 Bit
128 Bit
Memory clock speed
5600 MHz
1125 MHz
Memory bandwidth
179.2 GB/s
72 GB/s
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
No outputs
Eyefinity
-
1
HDMI
+
-
DirectX
12 (11_0)
DirectX® 11
CUDA
3.0
-
Mantle
-
+
OpenCL
1.2
Not Listed
OpenGL
4.6
4.4
Shader Model
5.1
5.1
Vulkan
1.1.126
-
AppAcceleration
-
-
DualGraphics
-
1
Enduro
-
-
FreeSync
-
1
HD3D
-
+
PowerTune
-
+
Switchable graphics
-
1
TrueAudio
-
-
ZeroCore
-
+