Does the Dell OptiPlex 7420 Plus All-In-One PC come with a built-in webcam?

Yes, it includes an FHD webcam.

What is the maximum speed of the Intel Core i7-14700 processor in the Dell OptiPlex 7420 Plus All-In-One PC?

The Intel Core i7-14700 processor can reach speeds up to 5.40GHz.

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Disclaimer: Product with upgraded specifications The manufacturer box is opened for Professional installation and testing
Dell OptiPlex 7420 Plus 24" Inch All-In-One PC
Powerful 14th Gen Intel Core i7-14700 Processor 20 cores and 28 threads deliver high performance for multitasking, business productivity, and everyday computing.
24-Inch Full HD Display (1920 × 1080) Crisp visuals with thin bezels and wide viewing angles, ideal for office or home workspace.
DDR5 Memory & SSD Storage Enjoy faster boot times, responsive apps, and efficient file handling for professional workloads.
Next-Gen Wi-Fi 6 & Bluetooth 5.2 Reliable high-speed wireless connectivity for smooth video calls and online collaboration.
All-in-One Space-Saving Design Combines monitor and computer in a sleek, clutter-free chassis for a clean desk setup.
Business-Class Security & Manageability Features TPM 2.0, BIOS management, and enterprise-grade reliability built for professionals.
5 x USB 3.2
1 x USB Type-C 3.2
DisplayPort, HDMI
1 x RJ-45 Ethernet
HD Webcam
SD Card Reader
Windows 11 Pro