Detailed Specs Comparison

Lenovo IdeaCentre A540 AIO (24”, AMD) vs. Lenovo ThinkCentre M90a

Here is a side by side comparison between Lenovo IdeaCentre A540 AIO (24”, AMD) and Lenovo ThinkCentre M90a specs including price, processors, memory, graphics, storage, ports, and more.

BY Evan Forrest February 25, 2022

Specs Comparison

	Compare With Please enter device name or part of it Lenovo IdeaCentre A540 AIO (24”, AMD) See at Amazon	Compare With Please enter device name or part of it Lenovo ThinkCentre M90a See at Amazon
Key Features
What's new	Up to 23.8” FHD Touch Display. AMD B300 Chipset. Up to AMD Ryzen™ 7 4700GE 8C/16T, 3.10 → 4.30 GHz, 4MB L2 Cache, 8MB L3 Cache, 35W TDP. Up to 512GB NVMe PCIe SSD. Up to 2TB 2.5” HDD. Up to 16GB dual-channel 2666MHz DDR4 Memory. More Features Optional built-in wireless charger. 2 x 3W stereo speakers + 5W Woofer. Up to Wi-Fi 5 and Bluetooth 4.0. Optional 1080p front-facing camera. Optional Windows Hello IR camera.	Up to 23.8” FHD Touch Display with optional PrivacyGuard. Intel® Q470 Chipset. 10th Generation Intel® Comet Lake Desktop Processors. Up to 10th Gen Intel® Core™ i9-10900 10C/20T, 2.80 → 5.20 GHz, 20MB SmartCache, 65W TDP. Up to AMD Radeon™ 625 with 2GB GDDR5 VRAM. Up to 1TB NVMe PCIe SSD. Up to 2 x 2TB 2.5” HDD. Up to 64GB dual-channel 2933MHz DDR4 Memory. More Features 2 x 3W stereo speakers with Dolby® Atmos™ support. Up to Wi-Fi 6 and Bluetooth 5.1. Optional 1080p front-facing camera. Optional Windows Hello IR camera. MIL-STD-810H military test passed. Toolless cover and stand assembly/removal.

Availability	Lenovo IdeaCentre A540 AIO (24”, AMD)	Lenovo ThinkCentre M90a
Released	2019	2020
Release Info	Announced on August 29, 2019 (IFA 2019). Available starting September 2019.	Announced on January 07, 2020 (CES 2020). Available starting June 2020.
Pricing	Starting at €799.00.	Starting at $1,099.
Applicable Models	2019 Lenovo IdeaCentre A540 (AMD) Lenovo IdeaCentre A540 24API Lenovo IdeaCentre A540 AIO (AMD) Lenovo IdeaCentre A540 All-in-One 24in (AMD)	2020 Lenovo ThinkCentre M90a Lenovo ThinkCentre M90a AIO Lenovo ThinkCentre M90a Gen 1 Lenovo ThinkCentre M90a All-in-One
Generations		2021 Lenovo ThinkCentre M90a Gen 2 Compare 2020 Lenovo ThinkCentre M90a Current

Lenovo IdeaCentre A540 (24”, AMD) Price
	Lenovo Ideacentre A540 All-in-One, 23.8" FHD Desktop, AMD Ryzen 5 Pro 4650GE, 16GB RAM 512GB PCIe SSD, Webcam, Wi-Fi, Wireless Keyboard & Mouse, Windows 10 Pro, Black By Lenovo $739.99	See at Amazon
	Lenovo IdeaCentre AIO 3 AMD All-in-One Computer, 24" FHD Display, Ryzen 5 5500U, 16GB RAM, 512GB SSD, DVD RW Drive, Windows 11 By Lenovo $599.88 Was: $749.99	See at Amazon
	Lenovo Ideacentre A540 Business All-in-One Desktop, 23.8" FHD Screen, AMD Ryzen 5 Pro 4650GE, 16GB RAM, 512GB SSD, Webcam, HDMI, Wi-Fi, Wireless Keyboard & Mouse, Windows 11 Pro, Black By Lenovo $749.99	See at Amazon
Lenovo ThinkCentre M90a AIO Price
	Lenovo ThinkCentre M90a All-in-one Business Computer, 23.8" FHD IPS Display, Intel Core i5 Processor, 16GB RAM, 256GB SSD + 1TB HDD, Wi-Fi, Webcam, USB-C, SD Card Reader, Windows 11 Pro By Lenovo $500.28 Was: $698.88	See at Amazon
	Lenovo ThinkCentre M90a 23.8" FHD AIO Business All-in-One Desktop, Intel Octa-Core i7-10700 up to 4.8GHz, 16GB DDR4 RAM, 512GB PCIe SSD, WiFi Adapter, Ethernet, Windows 11 Pro, BROAG Mouse Pad By Lenovo $519.00	See at Amazon
	Lenovo ThinkCentre Business All-in-one Computer, 23.8" FHD IPS Display, 13th Gen Intel Core i5-13420H Processor, 32GB RAM, 1TB PCIe SSD, Wi-Fi, Webcam, USB-C, Windows 11 Pro By Lenovo $829.99	See at Amazon

Display	Lenovo IdeaCentre A540 AIO (24”, AMD)	Lenovo ThinkCentre M90a
Size	23.8 Inches	23.8 Inches
Info	23.8” FHD Non-touch Display 23.8” FHD Multi-touch Display All Configurations 1920 x 1080, 16:9, IPS panel, 250 nits brightness, 1000:1 contrast ratio, wide viewing angle, borderless design, anti-glare surface.	23.8” FHD Display 250 nits, non-touch. 23.8” FHD PrivacyGuard Display 350 nits, non-touch. 23.8” FHD Touch Display 250 nits, multi-touch. All Configurations 1920 x 1080, 16:9, IPS panel, 1000:1 contrast ratio, +/- 89° viewing angle, borderless design, low blue light mode, anti-glare surface.

Exterior	Lenovo IdeaCentre A540 AIO (24”, AMD)	Lenovo ThinkCentre M90a
Size Comparison
Dimensions	17.75 x 7.28 x 17.13 inches (450.9 x 185 x 435.19 mm)	541 x 200 x 414.2-494.2 mm (21.3 x 7.9 x 16.3-19.5 inches) Models (with full function monitor stand, with ODD, with PrivacyGuard, with camera) 541 x 200 x 414.2-494.2 mm (21.3 x 7.9 x 16.3-19.5 inches) Models (with full function monitor stand, with ODD, without PrivacyGuard, with camera) 541 x 200 x 414.2-494.2 mm (21.3 x 7.9 x 16.3-19.5 inches) Models (with full function monitor stand, without ODD, with PrivacyGuard, with camera) 541 x 200 x 414.2-494.2 mm (21.3 x 7.9 x 16.3-19.5 inches) Models (with full function monitor stand, without ODD, without PrivacyGuard, with camera) Lowest in flat mode: 541 x 312.8 x 227.4 mm (21.3 x 12.3 x 9.0 inches) Highest in vertical mode: 541 x 232.7 x 467.7 mm (21.3 x 9.2 x 18.4 inches) Models (with UltraFlex IV stand, with ODD, without PrivacyGuard, with camera) Lowest in flat mode: 541 x 312.8 x 227.4 mm (21.3 x 12.3 x 9.0 inches) Highest in vertical mode: 541 x 232.7 x 467.7 mm (21.3 x 9.2 x 18.4 inches) Models (with UltraFlex IV stand, without ODD, without PrivacyGuard, with camera) 541 x 61.3 x 340.5 mm (21.3 x 2.4 x 13.4 inches) Models (without stand, with ODD, with PrivacyGuard, with camera) 541 x 57.8 x 340.5 mm (21.3 x 2.3 x 13.4 inches) Models (without stand, with ODD, without PrivacyGuard, with camera) 541 x 49.5 x 340.5 mm (21.3 x 1.9 x 13.4 inches) Models (without stand, without ODD, with PrivacyGuard, with camera) 541 x 46 x 340.5 mm (21.3 x 1.8 x 13.4 inches) Models (without stand, without ODD, without PrivacyGuard, with camera)
Weight	23.14 lbs (23.14 lbs)	8.71 kg (19.2 lbs) Models (with full function monitor stand, with ODD, with PrivacyGuard, with camera) 7.84 kg (17.3 lbs) Models (with full function monitor stand, with ODD, without PrivacyGuard, with camera) 8.39 kg (18.5 lbs) Models (with full function monitor stand, without ODD, with PrivacyGuard, with camera) 7.51 kg (16.6 lbs) Models (with full function monitor stand, without ODD, without PrivacyGuard, with camera) 8.58 kg (18.9 lbs) Models (with UltraFlex IV stand, with ODD, without PrivacyGuard, with camera) 8.26 kg (18.2 lbs) Models (with UltraFlex IV stand, without ODD, without PrivacyGuard, with camera) 6.45 kg (14.2 lbs) Models (without stand, with ODD, with PrivacyGuard, with camera) 5.57 kg (12.3 lbs) Models (without stand, with ODD, without PrivacyGuard, with camera) 6.13 kg (13.5 lbs) Models (without stand, without ODD, with PrivacyGuard, with camera) 5.25 kg (11.6 lbs) Models (without stand, without ODD, without PrivacyGuard, with camera)
Colors	Industry Black	Black
Keyboard and Trackpad	Keyboard Lenovo Premium Wireless Keyboard, grey Lenovo Calliope Keyboard (USB connector), black Lenovo Calliope Wireless Keyboard, black Mouse Lenovo Calliope Mouse (USB connector), black Lenovo Calliope Wireless Mouse (2.4GHz via USB receiver), black Lenovo Premium Wireless Mouse, grey	Keyboard Lenovo Calliope Keyboard (USB connector), black Lenovo Calliope Wireless Keyboard (2.4GHz via USB receiver), black Lenovo Traditional Keyboard (USB connector), black No keyboard Mouse Lenovo Calliope Mouse (USB connector), black Lenovo Calliope Wireless Mouse (2.4GHz via USB receiver), black Lenovo Fingerprint Mouse (USB connector), Windows Hello support, black No mouse
Ports	Left 2 x USB-A USB 3.2 Gen 1 (5 Gbps). 1 x Headset jack 3.5mm combo jack. 1 x SD Card Reader Rear 3 x USB-A 2 x USB 2.0 (480 Mbps). 1 x USB 3.2 Gen 1 (5 Gbps). 1 x HDMI-out 1.4 1 x HDMI-in 1 x RJ-45 10/100/1000 Gigabit Ethernet. Bottom 1 x Power connector	Right 2 x USB-A USB 3.2 Gen 2 (10 Gbps). 1 x USB-C USB 3.2 Gen 1 (5Gbps) with 15W (5W/3A) charging. 1 x Headset jack 3.5mm combo jack. 1 x Optional SD Card Reader Rear 4 x USB-A 3 x USB 3.2 Gen 1 (5 Gbps). 1 x USB 3.2 Gen 1 (5 Gbps) with Smart Power On. 1 x DisplayPort 1.2 1 x RJ-45 10/100/1000 Gigabit Ethernet. 1 x Optional Serial port 1 x Power connector 1 x Kensington Security Slot

Chasis	Lenovo IdeaCentre A540 AIO (24”, AMD)	Lenovo ThinkCentre M90a
Form Factor	All-in-One	All-in-One
Power Supply	120W Power Adapter 150W Power Adapter	150W Power Adapter 89% efficiency, for integrated graphics models. 170W Power Adapter 89% efficiency, for discrete graphics models.
Bays	1 x 2.5" disk bay	2 x 2.5" disk bay 2nd 2.5" HDD occupies ODD bay. 1 x slim ODD bay
Optical Drives		Optional slim optical disc drive
Chasis Information	Buttons Power button PC / monitor mode switcher Stand Monitor stand supports -5° to +25° tilt Special Features Optional Wireless charger	Buttons Power button PrivacyGuard on/off button PrivacyGuard model only. Microphone mute button Ease of Use Toolless cover and stand assembly/removal Stand Full function monitor stand, supports -5° to +30° tilt, up to 80mm lift UltraFlex IV stand, supports -5° to +70° tilt, up to 164mm lift (flat mode) / up to 115mm lift (vertical mode) No stand Mounting Supports VESA mount 100mm Mil-Spec Test MIL-STD-810H military test passed Low Pressure [Altitude], High Temperature, Low Temperature, Temperature Shock, Humidity, Sand and Dust, Vibration, Shock, Fungus, Solar Radiation.

Internal Specs	Lenovo IdeaCentre A540 AIO (24”, AMD)	Lenovo ThinkCentre M90a
Chipset	AMD B300 Chipset	Intel® Q470 Chipset
Processor	AMD Athlon™ PRO 300GE 2C/4T, 3.40 GHz, 1MB L2, 4MB L3 Cache, 35W AMD Ryzen™ 3 PRO 3200GE 4C/4T, 3.50 → 3.80 GHz, 2MB L2, 4MB L3 Cache, 35W AMD Ryzen™ 3 4300GE 4C/8T, 3.50 → 4.00 GHz, 2MB L2 Cache, 4MB L3 Cache, 35W AMD Ryzen™ 5 PRO 3400GE 4C/8T, 3.30 → 4.00 GHz, 2MB L2, 4MB L3 Cache, 35W AMD Ryzen™ 5 4600GE 6C/12T, 3.30 → 4.20 GHz, 3MB L2 Cache, 8MB L3 Cache, 35W AMD Ryzen™ 5 PRO 4650GE 6C/12T, 3.30 → 4.20 GHz, 3MB L2 Cache, 8MB L3 Cache, 35W AMD Ryzen™ 7 4700GE 8C/16T, 3.10 → 4.30 GHz, 4MB L2 Cache, 8MB L3 Cache, 35W	10th Gen Intel® Celeron® G5900 2C/2T, 3.40 GHz, 2MB SmartCache, 58W 10th Gen Intel® Celeron® G5905 2C/2T, 3.50 GHz, 4MB SmartCache, 58W 10th Gen Intel® Celeron® G5920 2C/2T, 3.50 GHz, 2MB SmartCache, 58W 10th Gen Intel® Celeron® G5925 2C/2T, 3.60 GHz, 4MB SmartCache, 58W 10th Gen Intel® Pentium® Gold G6400 2C/4T, 4.00 GHz, 4MB SmartCache, 58W 10th Gen Intel® Pentium® Gold G6500 2C/4T, 4.10 GHz, 4MB SmartCache, 58W 10th Gen Intel® Pentium® Gold G6600 2C/4T, 4.20 GHz, 4MB SmartCache, 58W 10th Gen Intel® Core™ i3-10100 4C/8T, 3.60 → 4.30 GHz, 6MB SmartCache, 65W 10th Gen Intel® Core™ i3-10300 4C/8T, 3.70 → 4.40 GHz, 8MB SmartCache, 65W 10th Gen Intel® Core™ i3-10320 4C/8T, 3.80 → 4.60 GHz, 8MB SmartCache, 65W 10th Gen Intel® Core™ i5-10400 6C/12T, 2.90 → 4.30 GHz, 12MB SmartCache, 65W 10th Gen Intel® Core™ i5-10500 6C/12T, 3.10 → 4.50 GHz, 12MB SmartCache, 65W 10th Gen Intel® Core™ i5-10600 6C/12T, 3.30 → 4.80 GHz, 12MB SmartCache, 65W 10th Gen Intel® Core™ i7-10700 8C/16T, 2.90 → 4.80 GHz, 16MB SmartCache, 65W 10th Gen Intel® Core™ i9-10900 10C/20T, 2.80 → 5.20 GHz, 20MB SmartCache, 65W
Integrated Graphics	AMD Athlon™ PRO 300GE AMD Radeon™ Vega Graphics 3 Graphics Cores, 1100 MHz AMD Ryzen™ 3 PRO 3200GE AMD Radeon™ RX Vega Graphics 8 Graphics Cores, 1200 MHz AMD Ryzen™ 3 4300GE AMD Radeon™ RX Vega Graphics 6 Graphics Cores, 1700 MHz AMD Ryzen™ 5 PRO 3400GE AMD Radeon™ RX Vega Graphics 11 Graphics Cores, 1300 MHz AMD Ryzen™ 5 4600GE AMD Radeon™ RX Vega Graphics 7 Graphics Cores, 1900 MHz AMD Ryzen™ 5 PRO 4650GE AMD Radeon™ RX Vega Graphics 7 Graphics Cores, 1900 MHz AMD Ryzen™ 7 4700GE AMD Radeon™ RX Vega Graphics 8 Graphics Cores, 2000 MHz	10th Gen Intel® Celeron® G5900 Intel® UHD Graphics 610 350 → 1050 MHz 10th Gen Intel® Celeron® G5905 Intel® UHD Graphics 610 350 → 1050 MHz 10th Gen Intel® Celeron® G5920 Intel® UHD Graphics 610 350 → 1050 MHz 10th Gen Intel® Celeron® G5925 Intel® UHD Graphics 610 350 → 1050 MHz 10th Gen Intel® Pentium® Gold G6400 Intel® UHD Graphics 610 350 → 1050 MHz 10th Gen Intel® Pentium® Gold G6500 Intel® UHD Graphics 630 350 → 1100 MHz 10th Gen Intel® Pentium® Gold G6600 Intel® UHD Graphics 630 350 → 1100 MHz 10th Gen Intel® Core™ i3-10100 Intel® UHD Graphics 630 23 Execution Units, 350 → 1100 MHz 10th Gen Intel® Core™ i3-10300 Intel® UHD Graphics 630 23 Execution Units, 350 → 1150 MHz 10th Gen Intel® Core™ i3-10320 Intel® UHD Graphics 630 23 Execution Units, 350 → 1150 MHz 10th Gen Intel® Core™ i5-10400 Intel® UHD Graphics 630 24 Execution Units, 350 → 1100 MHz 10th Gen Intel® Core™ i5-10500 Intel® UHD Graphics 630 24 Execution Units, 350 → 1150 MHz 10th Gen Intel® Core™ i5-10600 Intel® UHD Graphics 630 24 Execution Units, 350 → 1200 MHz 10th Gen Intel® Core™ i7-10700 Intel® UHD Graphics 630 24 Execution Units, 350 → 1200 MHz 10th Gen Intel® Core™ i9-10900 Intel® UHD Graphics 630 24 Execution Units, 350 → 1200 MHz
Discrete Graphics		Optional AMD Radeon™ 625 with 2GB GDDR5 VRAM
Memory	4GB 8GB 16GB Memory Slots: 2 x SO-DIMM slots Memory Type: Single or Dual Channel Non-ECC DDR4 Memory Memory Speed: 2666 MHz Memory Per Slot: 4GB 8GB	4GB 8GB 16GB 32GB 64GB Memory Slots: 2 x SO-DIMM slots Memory Type: Single or Dual Channel Non-ECC DDR4 Memory Memory Speed: 2666 MHz for 10th Gen Intel Core i3/i5 CPU 2933 MHz for 10th Gen Intel Core i7/i9 CPU Memory Per Slot: 4GB 8GB 16GB 32GB
Storage	128GB 256GB 512GB M.2 PCIe 3.0 x4 NVME SSD. 1TB 2TB 5.4K rpm 2.5” SATA Hard Drive.	128GB 256GB 512GB 1TB M.2 PCIe 3.0 x4 NVME SSD. 1TB 2TB 7200 rpm 2.5” SATA Hard Drive.
Slots	1 x M.2 2230 slot For WiFi and Bluetooth combo card 1 x M.2 2242/2080 slot For SSD	Expansion Slots No Expansion Slot SATA 2 x SATA slots For 2.5-inch HDD/SSD/ODD. M.2 1 x M.2 2230 slot For WiFi and Bluetooth combo card 1 x M.2 2242/2080 slot For SSD

Connectivity	Lenovo IdeaCentre A540 AIO (24”, AMD)	Lenovo ThinkCentre M90a
Wi-Fi	Wi-Fi 5 (802.11ac) M.2 card.	Realtek RTL8822CE, 802.11ac Dual Band 2x2 Wi-Fi® + Bluetooth 5.0, M.2 card Intel Wireless-AC 9560, 802.11ac Dual Band 2x2 Wi-Fi + Bluetooth 5.0, M.2 card Intel Wi-Fi 6 AX201, 802.11ax 2x2 Wi-Fi + Bluetooth 5.1, Intel vPro technology support, M.2 Card No WLAN and Bluetooth
Bluetooth	Bluetooth 4.0 Optional.	Bluetooth 5.0 Bluetooth 5.1 Optional.
Ethernet	Gigabit Ethernet controller Speed: 10/100/1000 Mbps.	Intel I219-LM Gigabit Ethernet controller 10/100/1000 Mbps, support Wake-on-LAN.

Software	Lenovo IdeaCentre A540 AIO (24”, AMD)	Lenovo ThinkCentre M90a
OS	Windows 10 Home \| Pro No operating system	Windows 10 Home \| Pro \| IoT Enterprise Ubuntu Linux No operating system
Built-in Apps	Lenovo Vantage Microsoft Office 2016

Camera & Audio	Lenovo IdeaCentre A540 AIO (24”, AMD)	Lenovo ThinkCentre M90a
Camera	HD Front-facing camera. 720p with fixed focus. Optional FHD Front-facing camera. 1080p with fixed focus. Optional Windows Hello IR support.	Optional Front-facing camera. 1080p, with ThinkShutter (physical switch on/off). Optional Windows Hello IR support.
Audio	High Definition (HD) Audio 2 x 3W stereo speakers. 1 x 5W woofer. Dual array microphone.	High Definition (HD) Audio, Realtek® ALC233 codec 2 x 3W stereo speakers. Dolby® Atmos® Speaker System. Dual array microphone.

Misc	Lenovo IdeaCentre A540 AIO (24”, AMD)	Lenovo ThinkCentre M90a
Sensors	IR Camera	IR Camera
Security	BIOS Security Administrator password Power-on password Windows Hello Facial Authentication	Security Chip Discrete TPM 2.0, TCG certified Physical Locks Kensington® Security Slot Chassis Intrusion Switch Chassis intrusion switch No chassis intrusion switch Fingerprint Reader Touch style fingerprint reader on mouse No fingerprint reader Other Security Optional ThinkShutter camera cover BIOS Security Administrator password Power-on password Hard disk password Boot sequence control Boot without keyboard and mouse Self-healing BIOS Smart USB protection (allows keyboard/mouse only, blocks all storage devices) Individual USB port disablement
Warranty	1-year mail-in service 1-year depot service 2-year depot service	1-year depot service 1-year limited onsite service 3-year limited onsite service No base warranty

Lenovo IdeaCentre A540 AIO (24”, AMD) vs. Lenovo ThinkCentre M90a

The Lenovo ThinkCentre M90a is a newer system that was released in 2020, while the Lenovo IdeaCentre A540 AIO (24”, AMD) was released years earlier in 2019. Both systems share the same all-in-one form factor that combines all components and a built-in monitor into one package.

Processor

The Central Processing Unit (CPU) is like the brains of your desktop computer. Its performance determines how fast and responsive your PC is. Generally, a processor with newer architecture, more CPU cores, higher TDP (measured in W), and faster clock speed (measured in GHz) tends to be more expensive and run faster than others with older architecture, fewer CPU cores, lower TDP, and lower clock speed.

For Lenovo IdeaCentre A540 AIO (24”, AMD), you have options to configure it with a 35W AMD Athlon™ Desktop dual-core AMD Athlon 300GE up to a 35W 8-core AMD Ryzen7 4700GE with a boost speed up to 4.30 GHz.

While Lenovo ThinkCentre M90a has configurations with a 58W 10th Generation Intel Comet Lake dual-core Intel Celeron G5900 up to a 65W 10-core Intel Core i9-10900 with a boost speed up to 5.20 GHz.

Memory

The Random Access Memory or RAM is the super-fast and temporary storage used to handle all active tasks, apps, and games that will go away when your PC turns off. The more memory your PC has, the better multitasking your PC can handle without having to reload data from slower permanent storage that includes the hard disk drive or solid-state drive.

Both PCs have the same amount of two RAM slots meaning that you upgrade later if you are unsatisfied with the amount of memory on your PC. You can upgrade memory on Lenovo IdeaCentre A540 AIO (24”, AMD) up to 16GB of 2666MHz dual-channel DDR4 memory. For Lenovo ThinkCentre M90a, it supports up to 64GB of 2933MHz dual-channel DDR4 memory.

Ports

Computer ports are the interface for connecting your PC to its peripheral devices or other PCs. The most common peripherals are keyboard, mouse, monitor, flash drive, speaker, and printer. Most of them use Universal Serial Bus (USB) as their connection to your computer. So the PC with more USB ports can connect to more peripherals at the same time.

There is a total number of 5 USB ports available on the Lenovo IdeaCentre A540 AIO (24”, AMD), two less than the Lenovo ThinkCentre M90a that has 7 USB ports. On top of the number of USB ports, the type and version of each USB port are also necessary for determining how fast it is.

The Lenovo IdeaCentre A540 AIO (24”, AMD) has five USB ports USB ports that all of them are Type-A port. It has two ports that support USB 2.0 (480 Mbps) and three ports that support USB 3.2 Gen 1 (5 Gbps).

For Lenovo ThinkCentre M90a, it has six USB Type-A ports and one USB Type-C port. The PC has five ports that support USB 3.2 Gen 1 (5 Gbps) and two ports that support USB 3.2 Gen 2 (10 Gbps).

Pricing

Lenovo IdeaCentre A540 (24”, AMD) Price
	Lenovo Ideacentre A540 All-in-One, 23.8" FHD Desktop, AMD Ryzen 5 Pro 4650GE, 16GB RAM 512GB PCIe SSD, Webcam, Wi-Fi, Wireless Keyboard & Mouse, Windows 10 Pro, Black By Lenovo $739.99	See at Amazon
	Lenovo IdeaCentre AIO 3 AMD All-in-One Computer, 24" FHD Display, Ryzen 5 5500U, 16GB RAM, 512GB SSD, DVD RW Drive, Windows 11 By Lenovo $599.88 Was: $749.99	See at Amazon
	Lenovo Ideacentre A540 Business All-in-One Desktop, 23.8" FHD Screen, AMD Ryzen 5 Pro 4650GE, 16GB RAM, 512GB SSD, Webcam, HDMI, Wi-Fi, Wireless Keyboard & Mouse, Windows 11 Pro, Black By Lenovo $749.99	See at Amazon
Lenovo ThinkCentre M90a AIO Price
	Lenovo ThinkCentre M90a All-in-one Business Computer, 23.8" FHD IPS Display, Intel Core i5 Processor, 16GB RAM, 256GB SSD + 1TB HDD, Wi-Fi, Webcam, USB-C, SD Card Reader, Windows 11 Pro By Lenovo $500.28 Was: $698.88	See at Amazon
	Lenovo ThinkCentre M90a 23.8" FHD AIO Business All-in-One Desktop, Intel Octa-Core i7-10700 up to 4.8GHz, 16GB DDR4 RAM, 512GB PCIe SSD, WiFi Adapter, Ethernet, Windows 11 Pro, BROAG Mouse Pad By Lenovo $519.00	See at Amazon
	Lenovo ThinkCentre Business All-in-one Computer, 23.8" FHD IPS Display, 13th Gen Intel Core i5-13420H Processor, 32GB RAM, 1TB PCIe SSD, Wi-Fi, Webcam, USB-C, Windows 11 Pro By Lenovo $829.99	See at Amazon