Detailed Specs Comparison

Lenovo ThinkCentre M90a Gen 2 vs. Dell Optiplex 7490 All-in-One

Here is a side by side comparison between Lenovo ThinkCentre M90a Gen 2 and Dell Optiplex 7490 All-in-One 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 ThinkCentre M90a Gen 2 See at Amazon	Compare With Please enter device name or part of it Dell Optiplex 7490 All-in-One See at Amazon
Key Features
What's new	Up to 23.8” FHD Touch Display with optional PrivacyGuard. Intel® Q570 Chipset. Supports 10th Generation Intel® Comet Lake Desktop Processors. Supports 11th Generation Intel® Rocket Lake Desktop Processors. Up to 11th Gen Intel® Core™ i9-11900 8C/16T, 2.50 → 5.20 GHz, 16MB SmartCache, 65W TDP. Up to AMD Radeon™ 630 with 2GB GDDR5 VRAM. Up to 1TB NVMe PCIe Gen 4.0 x4 SSD. Up to 2 x 2TB 2.5” HDD. Up to 64GB dual-channel 3200MHz DDR4 Memory. More Features 2 x 3W stereo speakers with Dolby® Atmos™ support. Up to Wi-Fi 6 and Bluetooth 5.2. Optional 5.0-megapixel front-facing camera. Optional Windows Hello IR camera. MIL-STD-810H military test passed. Toolless cover and stand assembly/removal.	Up to 23.8” FHD with Touch Monitor. New 10th and 11th Gen Intel Core Processors. Up to Intel Core i9-11900 (8 cores/ 16 threads). Up to NVIDIA® GeForce® GTX 1650 Ti, (4GB GDDR6). Up to 64GB 3200MHz DDR4 memory Up to 2 x 2TB PCIe Gen 3 x4 and Gen 4 x4 NVMe SSD. Built-in Infrared Camera for Windows Hello Sign-in.

Availability	Lenovo ThinkCentre M90a Gen 2	Dell Optiplex 7490 All-in-One
Released	2021	2021
Release Info	Announced on October 12, 2021.	Announced on May 11, 2021.
Pricing		10th Gen Intel Processor $2,170.00 i5-10505 16GB 256GB M.2 160W PSU Wi-Fi 6 $2,255.71 i7-10700 16GB 256GB M.2 160W PSU Wi-Fi 6 $2,312.86 i7-10700 16GB 512GB M.2 160W PSU Wi-Fi 6 11th Gen Intel Processor $1,927.14 i5-11500 8GB 256GB M.2 160W PSU Wi-Fi 6 $2,027.14 i5-11500 16GB 256GB M.2 160W PSU Wi-Fi 6 $2,218.00 i7-11700 8GB 128GB M.2 160W PSU Wi-Fi 6 $2,312.86 i7-11700 8GB 128GB M.2 160W PSU Wi-Fi 6 $2,893.00 i7-11700 8GB 512GB M.2 GTX 1650 Ti Touch Enabled 220W PSU Wi-Fi 6
Applicable Models	2021 Lenovo ThinkCentre M90a Lenovo ThinkCentre M90a Gen 2 Lenovo ThinkCentre M90a AIO Gen 2 Lenovo ThinkCentre M90a All-in-One Gen 2
Generations	2021 Lenovo ThinkCentre M90a Gen 2 Current 2020 Lenovo ThinkCentre M90a Compare	Dell Optiplex 7490 All-in-One Current Dell Optiplex 7480 All-in-One Compare

Lenovo ThinkCentre M90a All-in-One Gen 2 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 AIO 24" FHD IPS All-in-One Computer, 13th Gen Intel Processor up to 4.4 GHz, 16GB DDR5 RAM, 512GB PCIe SSD, Wi-Fi 6, USB-C, HDMI in&Out, KB&Mouse, Windows 11 Pro By Lenovo $499.99	See at Amazon
Dell Optiplex 7490 All-in-One Price
	Dell OptiPlex 7000 7490 All-in-One Computer - Intel Core i5 11th Gen i5-11500 Hexa-core (6 Core) 2.70 GHz - 8 GB RAM DDR4 SDRAM - 256 GB M.2 PCI Express NVMe 3.0 x4 SSD - 23.8" Full HD 1920 x 1080 - By Dell $399.00	See at Amazon
	Dell OptiPlex 7490 Home & Business All-in-One (Intel i5-11500 6-Core, 16GB RAM, 256GB PCIe SSD, Intel UHD 750, 23.8" 60 Hz Full HD (1920x1080), WiFi, Bluetooth, Win 11 Pro) Refurbished (Renewed) By Dell $833.99	See at Amazon
	Dell Optiplex 7000 7490 AIO (2021) \| 23.8" FHD \| Core i7-256GB SSD - 8GB RAM \| 8 Cores @ 4.8 GHz - 10th Gen CPU (Renewed) By Dell $795.00	See at Amazon

Display	Lenovo ThinkCentre M90a Gen 2	Dell Optiplex 7490 All-in-One
Size	23.8 Inches	23.8 Inches
Info	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.	23.8” FHD Non-Touch 1920 x 1080 92 PPI 16:9 250 nits 1000:1 72% NTSC 60Hz Anti-Glare 12.50W 23.8” FHD with Touch 1920 x 1080 141 PPI 16:9 250 nits 1000:1 72% NTSC 60Hz Anti-Glare 13.48W

Exterior	Lenovo ThinkCentre M90a Gen 2	Dell Optiplex 7490 All-in-One
Size Comparison
Dimensions	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)	21.26” x 13.54” x 2.07” (540.20 x 344 x 52.80 mm)
Weight	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)	Up to 14.46 lb (6.59 kg) Full HD Non-Touch models. Up to 13.87 lb (5.85 kg) Full HD with Touch models.
Colors	Black	Gray
Keyboard and Trackpad	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	Dell Pro Wireless Keyboard and Mouse - KM5221W - English Dell KB522 Business Multimedia Keyboard (US) Dell KB813 Smart Card Keyboard (US) Dell KB216 Wired Keyboard English No Keyboard
Ports	Right 2 x USB-A USB 3.2 Gen 2 (10 Gbps). 1 x USB-C USB 3.2 Gen 2 (10Gbps) 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 1.4b 1 x RJ-45 10/100/1000 Gigabit Ethernet. 1 x Power connector 1 x Kensington Security Slot 1 x Optional Serial port 1 x Optional HDMI 2.1	Side 1 x USB-A USB 3.2 Gen 1 (5 Gbps) with PowerShare. 1 x USB-C USB 3.2 Gen 2x2 (20 Gbps) for 11th Gen Intel Core CPU. USB 3.2 Gen 2x1 (10 Gbps) for 10th Gen Intel Core CPU. 1 x Universal Audio Jack 1 x SD 4.0 Card Slot Optional. Rear 2 x USB-A USB 3.2 Gen 2 (10 Gbps). 2 x USB-A USB 3.2 Gen 2 (10 Gbps) with Smart Power On. 1 x DisplayPort++ DisplayPort 1.4a supports 4K@120Hz and HDCP 2.3. 1 x HDMI-IN 1.4 1 x HDMI-OUT 2.0 1 x RJ-45 Gigabit Ethernet. 1 x Audio Jack Re-tasking Line out/Line in audio port. 1 x Kensington Lock Slot 1 x Power Connector

Chasis	Lenovo ThinkCentre M90a Gen 2	Dell Optiplex 7490 All-in-One
Form Factor	All-in-One	All-in-One
Power Supply	150W Power Adapter 89% efficiency with autosensing, for integrated graphics models. 170W Power Adapter 89% efficiency with autosensing, for discrete graphics models.	160W 80+ Bronze 85% Efficiency 220W 80+ Platinum 92% Efficiency
Bays	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 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.	Stands: Fixed stand Height Adjustable stand Articulating stand Height Adjustable stand with Optical Disk Drive

Internal Specs	Lenovo ThinkCentre M90a Gen 2	Dell Optiplex 7490 All-in-One
Chipset	Intel® Q570 Chipset	Intel® Q570 Chipset
Processor	10th Gen Intel® Celeron® G5905 2C/2T, 3.50 GHz, 4MB SmartCache, 58W 10th Gen Intel® Celeron® G5925 2C/2T, 3.60 GHz, 4MB SmartCache, 58W 10th Gen Intel® Pentium® Gold G6405 2C/4T, 4.10 GHz, 4MB SmartCache, 58W 10th Gen Intel® Pentium® Gold G6505 2C/4T, 4.20 GHz, 4MB SmartCache, 58W 10th Gen Intel® Pentium® Gold G6605 2C/4T, 4.30 GHz, 4MB SmartCache, 58W 10th Gen Intel® Core™ i3-10105 4C/8T, 3.70 → 4.40 GHz, 6MB SmartCache, 65W 10th Gen Intel® Core™ i3-10305 4C/8T, 3.80 → 4.50 GHz, 8MB SmartCache, 65W 10th Gen Intel® Core™ i3-10325 4C/8T, 3.90 → 4.70 GHz, 8MB SmartCache, 65W 11th Gen Intel® Core™ i5-11400 6C/12T, 2.60 → 4.40 GHz, 12MB SmartCache, 65W 11th Gen Intel® Core™ i5-11500 6C/12T, 2.70 → 4.60 GHz, 12MB SmartCache, 65W 11th Gen Intel® Core™ i5-11600 6C/12T, 2.80 → 4.80 GHz, 12MB SmartCache, 65W 11th Gen Intel® Core™ i7-11700 8C/16T, 2.50 → 4.90 GHz, 16MB SmartCache, 65W 11th Gen Intel® Core™ i9-11900 8C/16T, 2.50 → 5.20 GHz, 16MB SmartCache, 65W	10th Gen Intel® Core™ i3-10100 4C/8T, 3.60 → 4.30 GHz, 6MB SmartCache, 65W 10th Gen Intel® Core™ i3-10105 4C/8T, 3.70 → 4.40 GHz, 6MB SmartCache, 65W 10th Gen Intel® Core™ i3-10300 4C/8T, 3.70 → 4.40 GHz, 8MB SmartCache, 65W 10th Gen Intel® Core™ i3-10305 4C/8T, 3.80 → 4.50 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™ i5-10505 6C/12T, 3.20 → 4.60 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 11th Gen Intel® Core™ i5-11400 6C/12T, 2.60 → 4.40 GHz, 12MB SmartCache, 65W 11th Gen Intel® Core™ i5-11500 6C/12T, 2.70 → 4.60 GHz, 12MB SmartCache, 65W 11th Gen Intel® Core™ i5-11600 6C/12T, 2.80 → 4.80 GHz, 12MB SmartCache, 65W 11th Gen Intel® Core™ i7-11700 8C/16T, 2.50 → 4.90 GHz, 16MB SmartCache, 65W 11th Gen Intel® Core™ i9-11900 8C/16T, 2.50 → 5.20 GHz, 16MB SmartCache, 65W
Integrated Graphics	10th Gen Intel® Celeron® G5905 Intel® UHD Graphics 610 350 → 1050 MHz 10th Gen Intel® Celeron® G5925 Intel® UHD Graphics 610 350 → 1050 MHz 10th Gen Intel® Pentium® Gold G6405 Intel® UHD Graphics 610 350 → 1050 MHz 10th Gen Intel® Pentium® Gold G6505 Intel® UHD Graphics 630 350 → 1100 MHz 10th Gen Intel® Pentium® Gold G6605 Intel® UHD Graphics 630 350 → 1100 MHz 10th Gen Intel® Core™ i3-10105 Intel® UHD Graphics 630 23 Execution Units, 350 → 1100 MHz 10th Gen Intel® Core™ i3-10305 Intel® UHD Graphics 630 23 Execution Units, 350 → 1150 MHz 10th Gen Intel® Core™ i3-10325 Intel® UHD Graphics 630 23 Execution Units, 350 → 1150 MHz 11th Gen Intel® Core™ i5-11400 Intel® UHD Graphics 730 24 Execution Units, 350 → 1300 MHz 11th Gen Intel® Core™ i5-11500 Intel® UHD Graphics 750 32 Execution Units, 350 → 1300 MHz 11th Gen Intel® Core™ i5-11600 Intel® UHD Graphics 750 32 Execution Units, 350 → 1300 MHz 11th Gen Intel® Core™ i7-11700 Intel® UHD Graphics 750 32 Execution Units, 350 → 1300 MHz 11th Gen Intel® Core™ i9-11900 Intel® UHD Graphics 750 32 Execution Units, 350 → 1300 MHz	10th Gen Intel® Core™ i3-10100 Intel® UHD Graphics 630 23 Execution Units, 350 → 1100 MHz 10th Gen Intel® Core™ i3-10105 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™ i3-10305 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™ i5-10505 Intel® UHD Graphics 630 24 Execution Units, 350 → 1200 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 11th Gen Intel® Core™ i5-11400 Intel® UHD Graphics 730 24 Execution Units, 350 → 1300 MHz 11th Gen Intel® Core™ i5-11500 Intel® UHD Graphics 750 32 Execution Units, 350 → 1300 MHz 11th Gen Intel® Core™ i5-11600 Intel® UHD Graphics 750 32 Execution Units, 350 → 1300 MHz 11th Gen Intel® Core™ i7-11700 Intel® UHD Graphics 750 32 Execution Units, 350 → 1300 MHz 11th Gen Intel® Core™ i9-11900 Intel® UHD Graphics 750 32 Execution Units, 350 → 1300 MHz
Discrete Graphics	Optional AMD Radeon™ 630 with 2GB GDDR5 VRAM	Optional NVIDIA® GeForce® GTX 1650 Ti - 4GB GDDR6
Memory	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 CPU 3200 MHz for 11th Gen Intel CPU Memory Per Slot: 4GB 8GB 16GB 32GB	Memory Slots: 2 SO-DIMM slots Memory Type: Single or Dual Channel DDR4 Memory Memory Speed: 2666MHz 2933MHz 3200MHz Memory Configurations 4GB 8GB 16GB 32GB 64GB 2666 MHz for 10th Gen Intel Core i3/i5 CPU 2933 MHz for 10th Gen Intel Core i7/i9 CPU 3200 MHz for 11th Gen Intel Core CPU
Storage	128GB 256GB 512GB 1TB M.2 PCIe 3.0 x 4 or 4.0 x 4 NVME SSD. 1TB 2TB 5.4K or 7.2K rpm 2.5” SATA HDD.	256GB 512GB 1TB 2TB M.2 PCIe Gen 3 x4 or Gen 4 x4 NVME SSD 500GB 1TB 2TB 5400 rpm or 7200 rpm 2.5" SATA Hard Drive
Slots	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 PCIe 3.0 x 4 SSD	Expansion Slots No Expansion slot SATA 1 x 2.5” HDD Connector M.2 1 x M.2 2230 slot For WiFi and Bluetooth combo card 2 x M.2 2230/2280 slot For SSD/Intel Optane

Connectivity	Lenovo ThinkCentre M90a Gen 2	Dell Optiplex 7490 All-in-One
Wi-Fi	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 5.1, Intel vPro technology support, M.2 card Intel Wireless-AC 9560, 802.11ac Dual Band 2x2 Wi-Fi + Bluetooth 5.1, M.2 card Intel Wi-Fi 6 AX201, 802.11ax 2x2 Wi-Fi + Bluetooth 5.2, Intel vPro technology support, M.2 Card Intel Wi-Fi 6 AX201, 802.11ax 2x2 Wi-Fi + Bluetooth 5.2, M.2 Card No WLAN and Bluetooth	Qualcomm QCA61x4a Up to 867 Mbps Dual band 2.4 GHz/5 GHz WiFi-5 (802.11ac) Bluetooth 5.0 Intel AX201 Up to 2400 Mbps Dual band 2.4 GHz/5 GHz WiFi-6 (802.11ax) Bluetooth 5.1
Bluetooth	Bluetooth 5.0 Bluetooth 5.1 Bluetooth 5.2 Optional.	Bluetooth 5.0 Bluetooth 5.1
Ethernet	Intel I219-LM Gigabit Ethernet controller 10/100/1000 Mbps, support Wake-on-LAN.	Intel i219LM Gigabit Ethernet controller Speed: 10/100/1000 Mbps.

Software	Lenovo ThinkCentre M90a Gen 2	Dell Optiplex 7490 All-in-One
OS	Windows 10 Home \| Pro \| IoT Enterprise Ubuntu Linux No operating system	Windows 10 Home Windows 10 Pro Upgradable to Windows 11 Ubuntu Linux 20.04 LTS NeoKylin 7.0 (China only)
Built-in Apps		Microsoft Office 30 Day Trial

Camera & Audio	Lenovo ThinkCentre M90a Gen 2	Dell Optiplex 7490 All-in-One
Camera	Optional Front-facing camera. 5.0-megapixel, with ThinkShutter (physical switch on/off). Optional Windows Hello IR support.	Full HD Webcam Top-mount front camera with fixed focus lens, 2.07 Megapixels (1920 x 1080 HD) at 30 fps. Windows Hello Infrared Camera 0.30 Megapixels (640 x 480) at 30 fps.
Audio	High Definition (HD) Audio, Realtek® ALC233 codec 2 x 3W stereo speakers. Dolby® Atmos® Speaker System. Dual array microphone.	2 x 5W Speakers 2 x Microphones Audio controller: Realtek ALC3289 Amplifier: Realtek Amplifier ALC1302 External Ports 1 x Universal Audio Jack Front 1 x Audio port Line-out audio port with re-tasking to Line-in (Rear).

Misc	Lenovo ThinkCentre M90a Gen 2	Dell Optiplex 7490 All-in-One
Sensors	IR Camera
Security	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	Kensington lock Dell Lockable port cover (optional) Chassis lock slot support Noble Custom AIO Plate Lock (optional) Supply chain tamper alerts Chassis intrusion switch Trusted Platform Module (Discrete TPM Enabled) SafeBIOS including Dell Off-host BIOS Verification BIOS Resilience BIOS Recovery, and additional BIOS Controls SafeID including Trusted Platform Module (TPM) 2.0 Self-Encrypting Drives (SED) Smart card keyboard (FIPS) D-Pedigree (Secure Supply Chain Functionality) Dell wired mouse with fingerprinter reader
Warranty	1-year limited onsite service 3-year limited onsite service No base warranty	3-Year Basic Onsite Service

Lenovo ThinkCentre M90a Gen 2 vs. Dell Optiplex 7490 All-in-One

The Lenovo ThinkCentre M90a Gen 2 and the Dell Optiplex 7490 All-in-One were released in the same year, 2021. 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 ThinkCentre M90a Gen 2, you have options to configure it with a 58W 10th Generation Intel Comet Lake dual-core Intel Celeron G5905 up to a 65W 8-core Intel Core i9-11900 with a boost speed up to 5.20 GHz.

While Dell Optiplex 7490 All-in-One has configurations with a 65W 10th Generation Intel Comet Lake quad-core Intel Core i3-10100 up to a 65W 8-core Intel Core i9-11900 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 both systems up to 64GB of 3200MHz 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 7 USB ports available on the Lenovo ThinkCentre M90a Gen 2, one more than the Dell Optiplex 7490 All-in-One that has only 6 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 ThinkCentre M90a Gen 2 has six USB Type-A ports and one USB Type-C port. It has four ports that support USB 3.2 Gen 1 (5 Gbps) and three ports that support USB 3.2 Gen 2 (10 Gbps).

For Dell Optiplex 7490 All-in-One, it has five USB Type-A ports and one USB Type-C port. The PC has two ports that support USB 2.0 (480 Mbps), one port that supports USB 3.2 Gen 1 (5 Gbps), four ports that support USB 3.2 Gen 2 (10 Gbps), and one port that supports USB 3.2 Gen 2x2 (20 Gbps).

Pricing

Lenovo ThinkCentre M90a All-in-One Gen 2 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 AIO 24" FHD IPS All-in-One Computer, 13th Gen Intel Processor up to 4.4 GHz, 16GB DDR5 RAM, 512GB PCIe SSD, Wi-Fi 6, USB-C, HDMI in&Out, KB&Mouse, Windows 11 Pro By Lenovo $499.99	See at Amazon
Dell Optiplex 7490 All-in-One Price
	Dell OptiPlex 7000 7490 All-in-One Computer - Intel Core i5 11th Gen i5-11500 Hexa-core (6 Core) 2.70 GHz - 8 GB RAM DDR4 SDRAM - 256 GB M.2 PCI Express NVMe 3.0 x4 SSD - 23.8" Full HD 1920 x 1080 - By Dell $399.00	See at Amazon
	Dell OptiPlex 7490 Home & Business All-in-One (Intel i5-11500 6-Core, 16GB RAM, 256GB PCIe SSD, Intel UHD 750, 23.8" 60 Hz Full HD (1920x1080), WiFi, Bluetooth, Win 11 Pro) Refurbished (Renewed) By Dell $833.99	See at Amazon
	Dell Optiplex 7000 7490 AIO (2021) \| 23.8" FHD \| Core i7-256GB SSD - 8GB RAM \| 8 Cores @ 4.8 GHz - 10th Gen CPU (Renewed) By Dell $795.00	See at Amazon