GeForce GT 645 OEM and GeForce RTX 4090 - video card comparison
GeForce GT 645 OEM
GeForce RTX 4090
Architecture
Fermi 2.0 (2010−2014)
Ada Lovelace
GPU code name
GF114
AD102-300-A1
Market segment
Desktop
Desktop
Release date
April 2012
September 2022
Interface
PCIe 2.0 x16
PCIe 4.0 x16
Supplementary power connectors
-
1x 16-pin
Boost clock speed
-
2520 MHz
Core clock speed
776 MHz
2235 MHz
Floating-point performance
894.0 gflops
-
Manufacturing process technology
40 nm
5 nm
Number of transistors
1,950 million
76,300 million
Pipelines / CUDA cores
288
16384
Power consumption (TDP)
102 Watt
450 Watt
Texture fill rate
37.25
1,290
Memory type
GDDR5
GDDR6X
Maximum RAM amount
1 GB
24 GB
Memory bus width
192 Bit
384 Bit
Memory clock speed
3828 MHz
21000 MHz
Memory bandwidth
91.87 GB/s
1,008 GB/s
Shared memory
-
-
Display Connectors
2x DVI, 1x mini-HDMI
1x HDMI 2.1, 3x DisplayPort 1.4a
HDMI
+
+
DirectX
12 (11_0)
12 Ultimate (12_2)
CUDA
2.1
8.9
OpenCL
1.1
3.0
OpenGL
4.6
4.6
Shader Model
5.1
6.6
Vulkan
N/A
1.3