GeForce GTX 660 Ti and Radeon HD 3850 - video card comparison
Passmark - benchmark score GeForce GTX 660 Ti vs Radeon HD 3850
GeForce GTX 660 Ti
4547
Radeon HD 3850
404
GeForce GTX 660 Ti
Radeon HD 3850
Architecture
Kepler (2012−2018)
TeraScale (2005−2013)
GPU code name
GK104
RV670
Market segment
Desktop
Desktop
Release date
August 2012
November 2007
Bus support
PCI Express 3.0
-
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
Two 6-pin
1x 6-pin
SLI options
+
-
Boost clock speed
980 MHz
-
Core clock speed
915 MHz
668 MHz
CUDA cores
1344
-
Floating-point performance
2,459.5 gflops
427.5 gflops
Manufacturing process technology
28 nm
55 nm
Number of transistors
3,540 million
666 million
Pipelines / CUDA cores
1344
320
Power consumption (TDP)
150 Watt
75 Watt
Texture fill rate
102.5 billion/sec
10.69
Memory type
GDDR5
GDDR3
Maximum RAM amount
2 GB
1 GB
Memory bus width
192-bit GDDR5
256 Bit
Memory clock speed
6.0 GB/s
1660 MHz
Memory bandwidth
144.2 GB/s
53.12 GB/s
Shared memory
-
-
Display Connectors
One Dual Link DVI-I, One Dual Link DVI-D, One HDMI, One DisplayPort
2x DVI, 1x S-Video
Multi monitor support
4 displays
-
HDMI
+
-
HDCP
+
-
Maximum VGA resolution
2048x1536
-
Audio input for HDMI
Internal
-
DirectX
12 (11_0)
10.1 (10_1)
CUDA
+
-
OpenCL
1.2
N/A
OpenGL
4.3
3.3
Shader Model
5.1
4.1
Vulkan
1.1.126
N/A
3D Blu-Ray
+
-
3D Gaming
+
-
3D Vision
+
-