GeForce GT 645M and Radeon RX 6600 XT - video card comparison
Passmark - benchmark score GeForce GT 645M vs Radeon RX 6600 XT
GeForce GT 645M
957
Radeon RX 6600 XT
16985
GeForce GT 645M
Radeon RX 6600 XT
Architecture
Kepler (2012−2018)
Navi / RDNA2 (2020−2022)
GPU code name
N13P-GS
Navi 23
Market segment
Laptop
Desktop
Release date
March 2012
July 2021
Bus support
PCI Express 2.0, PCI Express 3.0
-
Interface
PCIe 3.0 x16
PCIe 4.0 x8
Supplementary power connectors
-
1x 8-pin
Boost clock speed
-
2589 MHz
Core clock speed
Up to 710 MHz
1968 MHz
CUDA cores
384
-
Floating-point performance
544.5 gflops
-
Manufacturing process technology
28 nm
7 nm
Number of transistors
1,270 million
11,060 million
Pipelines / CUDA cores
384
2048
Power consumption (TDP)
32 Watt
160 (TGP) Watt
Texture fill rate
22.7 billion/sec
331.4
Memory type
DDR3\GDDR5
GDDR6
Maximum RAM amount
2 GB
8 GB
Memory bus width
128bit
128 Bit
Memory clock speed
1800 MHz
16000 MHz
Memory bandwidth
Up to 64.0 GB/s
256.0 GB/s
Shared memory
-
-
Display Connectors
No outputs
1x HDMI, 2x DisplayPort
HDMI
+
+
HDCP
+
-
Maximum VGA resolution
Up to 2048x1536
-
DirectX
12 API
12.0 Ultimate (12_2)
CUDA
+
-
OpenCL
1.1
2.1
OpenGL
4.5
4.6
Shader Model
5.1
6.5
Vulkan
1.1.126
1.2
3D Blu-Ray
+
-
Optimus
+
-