GeForce GTX 970 and GeForce GTX 660 OEM - video card comparison
GeForce GTX 970
GeForce GTX 660 OEM
Architecture
Maxwell (2014−2018)
Kepler (2012−2018)
GPU code name
GM204
GK104
Market segment
Desktop
Desktop
Release date
September 2014
August 2012
Bus support
PCI Express 3.0
-
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Recommended system power (PSU)
500 Watt
-
Supplementary power connectors
2x 6-pins
1x 6-pin
SLI options
+
-
Boost clock speed
1178 MHz
888 MHz
Core clock speed
1050 MHz
823 MHz
CUDA cores
1664
-
Floating-point performance
3,920 gflops
2,046 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
5,200 million
3,540 million
Pipelines / CUDA cores
1664
1152
Power consumption (TDP)
145 Watt
130 Watt
Maximum GPU temperature
98 °C
-
Texture fill rate
109 billion/sec
85.25
Memory type
GDDR5
GDDR5
Maximum RAM amount
4 GB
2 GB
Memory bus width
256 Bit
256 Bit
Memory clock speed
7.0 GB/s
5600 MHz
Memory bandwidth
224 GB/s
179.2 GB/s
Shared memory
-
-
Display Connectors
Dual Link DVI-I, HDMI 2.0, 3x DisplayPort 1.2
2x DVI, 1x HDMI, 1x DisplayPort
Multi monitor support
4 displays
-
HDMI
+
+
HDCP
+
-
Maximum VGA resolution
2048x1536
-
G-SYNC support
+
-
Audio input for HDMI
Internal
-
DirectX
12 (12_1)
12 (11_0)
CUDA
+
3.0
OpenCL
1.2
1.2
OpenGL
4.4
4.6
Shader Model
6.4
5.1
Vulkan
1.1.126
1.1.126
GameStream
+
-
GameWorks
+
-
GeForce ShadowPlay
+
-
GPU Boost
2.0
-