GeForce GTX 660 and GeForce 256 DDR - video card comparison
GeForce GTX 660
GeForce 256 DDR
Architecture
Kepler (2012−2018)
Celsius (1999−2005)
GPU code name
GK106
NV10 A3
Market segment
Desktop
Desktop
Release date
September 2012
December 1999
Bus support
PCI Express 3.0
-
Interface
PCIe 3.0 x16
AGP 4x
Supplementary power connectors
One 6-pin
None
SLI options
+
-
Boost clock speed
1033 MHz
-
Core clock speed
980 MHz
120 MHz
CUDA cores
960
-
Floating-point performance
1,981 gflops
-
Manufacturing process technology
28 nm
220 nm
Number of transistors
2,540 million
17 million
Pipelines / CUDA cores
960
-
Power consumption (TDP)
140 Watt
-
Texture fill rate
78.4 billion/sec
0.48
Memory type
GDDR5
DDR
Maximum RAM amount
2 GB
32 MB
Memory bus width
192-bit GDDR5
128 Bit
Memory clock speed
6.0 GB/s
300 MHz
Memory bandwidth
144.2 GB/s
4.8 GB/s
Display Connectors
One Dual Link DVI-I, One Dual Link DVI-D, One HDMI, One DisplayPort
1x VGA
Multi monitor support
4 displays
-
HDMI
+
-
HDCP
+
-
Maximum VGA resolution
2048x1536
-
Audio input for HDMI
Internal
-
DirectX
12 (11_0)
7.0
CUDA
+
-
OpenCL
1.2
N/A
OpenGL
4.3
1.2
Shader Model
5.1
-
Vulkan
1.1.126
N/A
3D Blu-Ray
+
-
3D Gaming
+
-
3D Vision
+
-