GeForce GTX 780 Rev. 2 and GeForce GTX 645 OEM - video card comparison
GeForce GTX 780 Rev. 2
GeForce GTX 645 OEM
Architecture
Kepler (2012−2018)
Kepler (2012−2018)
GPU code name
GK110B
GK106
Market segment
Desktop
Desktop
Release date
September 2013
April 2013
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
1x 6-pin + 1x 8-pin
None
Boost clock speed
902 MHz
-
Core clock speed
863 MHz
824 MHz
Floating-point performance
4,156 gflops
949.2 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
7,080 million
2,540 million
Pipelines / CUDA cores
2304
576
Power consumption (TDP)
250 Watt
65 Watt
Texture fill rate
173.2
39.55
Memory type
GDDR5
GDDR5
Maximum RAM amount
3 GB
1 GB
Memory bus width
384 Bit
128 Bit
Memory clock speed
6008 MHz
4000 MHz
Memory bandwidth
288.4 GB/s
64 GB/s
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
1x DVI, 1x HDMI, 1x DisplayPort
HDMI
+
+
DirectX
12 (11_1)
12 (11_0)
CUDA
3.5
3.0
OpenCL
1.2
1.2
OpenGL
4.6
4.6
Shader Model
5.1
5.1
Vulkan
1.1.126
1.1.126