GeForce GTX 780 Ti and GeForce GTX 645 OEM - video card comparison
GeForce GTX 780 Ti
GeForce GTX 645 OEM
Architecture
Kepler (2012−2018)
Kepler (2012−2018)
GPU code name
GK110
GK106
Market segment
Desktop
Desktop
Release date
November 2013
April 2013
Bus support
PCI Express 3.0
-
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
One 8-pin and one 6-pin
None
SLI options
+
-
Boost clock speed
928 MHz
-
Core clock speed
875 MHz
824 MHz
CUDA cores
2880
-
Floating-point performance
5,345 gflops
949.2 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
7,080 million
2,540 million
Pipelines / CUDA cores
2880
576
Power consumption (TDP)
250 Watt
65 Watt
Texture fill rate
210 billion/sec
39.55
Memory type
GDDR5
GDDR5
Maximum RAM amount
3 GB
1 GB
Memory bus width
384 Bit
128 Bit
Memory clock speed
7.0 GB/s
4000 MHz
Memory bandwidth
336 GB/s
64 GB/s
Shared memory
-
-
Display Connectors
One Dual Link DVI-I, One Dual Link DVI-D, One HDMI, One DisplayPort
1x DVI, 1x HDMI, 1x DisplayPort
Multi monitor support
4 displays
-
HDMI
+
+
HDCP
+
-
Maximum VGA resolution
2048x1536
-
Audio input for HDMI
Internal
-
DirectX
12 (11_1)
12 (11_0)
CUDA
+
3.0
OpenCL
1.2
1.2
OpenGL
4.4
4.6
Shader Model
5.1
5.1
Vulkan
1.1.126
1.1.126
3D Gaming
+
-
3D Vision
+
-
3D Vision Live
+
-
Blu Ray 3D
+
-