GeForce GT 645 OEM and Radeon RX 6600 - video card comparison
GeForce GT 645 OEM
Radeon RX 6600
Architecture
Fermi 2.0 (2010−2014)
Navi / RDNA2 (2020−2022)
GPU code name
GF114
Navi 23
Market segment
Desktop
Desktop
Release date
April 2012
October 2021
Interface
PCIe 2.0 x16
PCIe 4.0 x8
Supplementary power connectors
-
1x 8-pin
Boost clock speed
-
2491 MHz
Core clock speed
776 MHz
2044 MHz
Floating-point performance
894.0 gflops
-
Manufacturing process technology
40 nm
7 nm
Number of transistors
1,950 million
11,060 million
Pipelines / CUDA cores
288
1792
Power consumption (TDP)
102 Watt
132 Watt
Texture fill rate
37.25
279.0
Memory type
GDDR5
GDDR6
Maximum RAM amount
1 GB
8 GB
Memory bus width
192 Bit
128 Bit
Memory clock speed
3828 MHz
14500 MHz
Memory bandwidth
91.87 GB/s
224.0 GB/s
Shared memory
-
-
Display Connectors
2x DVI, 1x mini-HDMI
1x HDMI, 3x DisplayPort
HDMI
+
+
DirectX
12 (11_0)
12.0 Ultimate (12_2)
CUDA
2.1
-
OpenCL
1.1
2.1
OpenGL
4.6
4.6
Shader Model
5.1
6.5
Vulkan
N/A
1.2