XPS 8960, loud hmmm noise

Just bought a new XPS 8960 on black Friday, and this one overall is great. But I keep hearing the noise from it. It is not loud but annoying, like hmmm sound. I contacted customer service, and they sent me a technician but the technician just said the sound was normal and pretty quiet. I am just wondering if is it normal or not. I have an Optiplex in my office, that one is completely quiet though.  I am a newbie to computer:(

below is my specification:

• Cable

  US Power Cord

  Item number: 450-AAGO

• CD ROM/DVD ROM

  No Optical Drive

  Item number: 429-AAXO

• Chassis Options

  750W Platinum

  Item number: 321-BKXC

• Cooling Option

  Standard CPU air cooling

  Item number: 321-BHGJ

• Documentation/Disks

  Documentation, English w/ QR Code

  Item number: 340-DFJM

• Driver

  Killer 1675 wireless driver

  Item number: 555-BIJK

• FGA Module

  Custom Configuration

  Item number: 817-BBBB

• Graphics

  NVIDIA(R) GeForce RTX(TM) 4060 Ti 8GB GDDR6

  Item number: 490-BJRV

• Home and Small Business Security Solutions

  McAfee+ Premium 1-year

  Item number: 525-0036
  McAfee+ Premium 30-day trial

  Item number: 658-BCCO

• Keyboard

  Dell Wired Keyboard KB216 Black (English)

  Item number: 580-AILI

• Label

  Regulatory Label

  Item number: 389-FCHP

• Memory

  64GB, 2X32GB, DDR5, 5600MT/s

  Item number: 370-BBSK

• Microsoft Office

  Activate Your Microsoft 365 For A 30 Day Trial

  Item number: 658-BCSB

• Monitor

  If accessories are purchased, they may ship separately

  Item number: 480-AACF

• Mouse

  Dell Wired Mouse BLK

  Item number: 570-AATH

• Non-Microsoft Application Software

  Additional Software

  Item number: 658-BCUJ

• Operating System

  Windows 11 Home, English, French, Spanish

  Item number: 619-AQKD

• Optical Software

  Not selected in this configuration

  Item number: 817-BBBC

• Packaging

  Shipping Material

  Item number: 328-BFKK

• Processor

  14th Gen Intel® Core™ i9-14900 processor (24 cores, 32 threads, 2.0GHz to 5.4GHz)

  Item number: 338-CNHF

• Processor Branding

  Intel Core i9 Processor Label

  Item number: 389-DYKH

• Retail Information

  Dell.com Order

  Item number: 332-1530

• Speakers

  No speakers

  Item number: 520-AAAO

• Standard Hardware Support Service

  Onsite/In-Home Service After Remote Diagnosis, 1 Year

  Item number: 801-1849
  Dell Limited Hardware Warranty Initial Year

  Item number: 801-1802

• Storage

  1TB M.2 PCIe NVME SSD (Boot) + 2TB SATA 7200RPM HDD (Storage)

  Item number: 400-BOSN

• Systems Management

  Windows System Driver

  Item number: 631-ADQC

• Wireless

  Intel(R) Killer(TM) Wi-Fi 6E AX1675, 2x2, 802.11ax, Bluetooth(R) wireless card

  Item number: 555-BIHW