GeForce 7800 GT and GeForce GTX 645 OEM - video card comparison
GeForce 7800 GT
GeForce GTX 645 OEM
Architecture
Curie (2003−2013)
Kepler (2012−2018)
GPU code name
G70
GK106
Market segment
Desktop
Desktop
Release date
August 2005
April 2013
Interface
PCIe 1.0 x16
PCIe 3.0 x16
Supplementary power connectors
1x 6-pin
None
Core clock speed
400 MHz
824 MHz
Floating-point performance
-
949.2 gflops
Manufacturing process technology
110 nm
28 nm
Number of transistors
302 million
2,540 million
Pipelines / CUDA cores
-
576
Power consumption (TDP)
65 Watt
65 Watt
Texture fill rate
8.000
39.55
Memory type
GDDR3
GDDR5
Maximum RAM amount
256 MB
1 GB
Memory bus width
256 Bit
128 Bit
Memory clock speed
1000 MHz
4000 MHz
Memory bandwidth
32 GB/s
64 GB/s
Display Connectors
2x DVI, 1x S-Video
1x DVI, 1x HDMI, 1x DisplayPort
HDMI
-
+
DirectX
9.0c (9_3)
12 (11_0)
CUDA
-
3.0
OpenCL
N/A
1.2
OpenGL
2.1
4.6
Shader Model
3.0
5.1
Vulkan
N/A
1.1.126