GeForce GTX 980 and GeForce GTX 660 - video card comparison
Passmark - benchmark score GeForce GTX 980 vs GeForce GTX 660
GeForce GTX 980
11458
GeForce GTX 660
4119
GeForce GTX 980
GeForce GTX 660
Architecture
Maxwell (2014−2018)
Kepler (2012−2018)
GPU code name
GM204
GK106
Market segment
Desktop
Desktop
Release date
September 2014
September 2012
Bus support
PCI Express 3.0
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
One 6-pin
SLI options
+
+
Boost clock speed
1216 MHz
1033 MHz
Core clock speed
1064 MHz
980 MHz
CUDA cores
2048
960
Floating-point performance
4,981 gflops
1,981 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
5,200 million
2,540 million
Pipelines / CUDA cores
2048
960
Power consumption (TDP)
165 Watt
140 Watt
Texture fill rate
144 billion/sec
78.4 billion/sec
Memory type
GDDR5
GDDR5
Maximum RAM amount
4 GB
2 GB
Memory bus width
256 Bit
192-bit GDDR5
Memory clock speed
7.0 GB/s
6.0 GB/s
Memory bandwidth
224 GB/s
144.2 GB/s
Shared memory
-
-
Display Connectors
Dual Link DVI-I, HDMI 2.0, 3x DisplayPort 1.2
One Dual Link DVI-I, One Dual Link DVI-D, One HDMI, One DisplayPort
Multi monitor support
4 displays
4 displays
VGA аnalog display support
+
-
DisplayPort Multimode (DP++) support
+
-
HDMI
+
+
HDCP
+
+
Maximum VGA resolution
2048x1536
2048x1536
G-SYNC support
+
-
Audio input for HDMI
Internal
Internal
DirectX
12 (12_1)
12 (11_0)
CUDA
+
+
OpenCL
1.2
1.2
OpenGL
4.5
4.3
Shader Model
6.4
5.1
Vulkan
1.1.126
1.1.126
3D Blu-Ray
-
+
3D Gaming
-
+
3D Vision
-
+
BatteryBoost
+
-
GameStream
+
-
GameWorks
+
-
GeForce ShadowPlay
+
-
GPU Boost
2.0
-
H.264, VC1, MPEG2 1080p video decoder
+
-
Optimus
+
-