In depth comparison and review of Lenovo ThinkPad T590 (20N4) and Lenovo ThinkBook 15 G4 IAP (21DJ). Compare sizes, performance, storage capacities, batteries and other important specifications and features to easily choose the right laptop for you. Our goal is to help you uncover differences between the products and find the laptop that will best fit your needs.
Advantages and disadvantages of Lenovo ThinkPad T590 (20N4) based on its technical characteristics, features, user experience, expert reviews and price level.
robust build quality
excellent keyboard comfort
impressive battery life
solid performance
good security features
heavier than competitors
average display brightness
limited graphics power
noisy under load
Advantages and disadvantages of Lenovo ThinkBook 15 G4 IAP (21DJ) based on its technical characteristics, features, user experience, expert reviews and price level.
robust aluminum design
efficient multitasking performance
comprehensive connectivity options
fast charging support
competitive pricing
average display quality
modest battery life
limited graphics performance
noisy under load
DESIGN AND DIMENSIONS | Lenovo ThinkPad T590 (20N4) | Lenovo ThinkBook 15 G4 IAP (21DJ) |
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Product Type | Notebook | Notebook - 180-degree hinge design |
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Dimensions (WxDxH) | 36.58 cm x 24.8 cm x 1.91 cm | 35.7 cm x 23.5 cm x 1.89 cm |
Weight | 1.75 kg | 1.7 kg |
Case Material | Glass-fibre, polyphenylene sulfide, polyamide | Aluminium (top), polycarbonate ABS (bottom) |
Colour | Black | Dual tone mineral grey |
DISPLAY | Lenovo ThinkPad T590 (20N4) | Lenovo ThinkBook 15 G4 IAP (21DJ) |
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Screen Size (Type) | 15.6" | 15.6" - IPS |
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LCD Backlight Technology | LED backlight | LED backlight |
Screen Resolution | - | 1920 x 1080 (Full HD) |
Widescreen | - | Yes |
Image Aspect Ratio | - | 16:9 |
Image Brightness | - | 300 cd/m² |
Colour Gamut | - | 45% NTSC |
Features | - | Anti-glare, 170° viewing angle |
PROCESSOR | Lenovo ThinkPad T590 (20N4) | Lenovo ThinkBook 15 G4 IAP (21DJ) |
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CPU | No CPU | Intel Core i5 (12th Gen) 1235U / 1.3 GHz |
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Max Turbo Speed | - | 4.4 GHz |
Number of Cores | - | 10-core |
Cache | - | 12 MB |
Features | - | Integrated memory controller |
MEMORY | Lenovo ThinkPad T590 (20N4) | Lenovo ThinkBook 15 G4 IAP (21DJ) |
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RAM | 0 GB | 8 GB (provided memory is soldered) |
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Max RAM Supported | 48 GB | 40 GB |
RAM Type | DDR4 SDRAM | DDR4 SDRAM |
Speed | - | 3200 MHz |
Rated Speed | - | 3200 MHz |
Form Factor | SO-DIMM 260-pin | SO-DIMM 260-pin |
Slots Qty | 1 | 1 |
Empty Slots | 1 | 1 |
STORAGE | Lenovo ThinkPad T590 (20N4) | Lenovo ThinkBook 15 G4 IAP (21DJ) |
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Main Storage Size (HDD/SSD) | - | 256 GB SSD M.2 2242 PCIe 4.0 x4 - NVM Express (NVMe) |
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AUDIO & VIDEO | Lenovo ThinkPad T590 (20N4) | Lenovo ThinkBook 15 G4 IAP (21DJ) |
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Graphics Processor (GPU) | - | Intel Iris Xe Graphics |
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Max Monitors Supported | - | 3 external monitor(s) |
Camera | - | Yes - 1080p |
Camera Features | - | Privacy shutter, fixed focus |
Sound | Stereo speakers, dual array microphone | Stereo speakers, dual array microphone |
Codec | Realtek ALC3287 | Realtek ALC3287 |
Compliant Standards | High Definition Audio, Dolby Audio Premium | High Definition Audio, Dolby Audio |
COMMUNICATIONS | Lenovo ThinkPad T590 (20N4) | Lenovo ThinkBook 15 G4 IAP (21DJ) |
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Wireless | - | 802.11a/b/g/n/ac/ax, Bluetooth 5.2 |
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Wireless Controller | - | M.2 Card |
Network Interface | Gigabit Ethernet | Gigabit Ethernet |
Ethernet Controller | - | Intel I219-V |
Features | - | Wake-on-LAN (WOL), dual stream (2x2) |
BATTERY | Lenovo ThinkPad T590 (20N4) | Lenovo ThinkBook 15 G4 IAP (21DJ) |
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Technology | Lithium Ion | Lithium polymer |
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Battery Capacity (Size) | 57 Wh | 45 Wh |
Battery Life | - | Up to 8 hours |
Battery Run Time | - | Local video (1080p) playback time (150 nits): up to 8 hours |
AC ADAPTER | Lenovo ThinkPad T590 (20N4) | Lenovo ThinkBook 15 G4 IAP (21DJ) |
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Input | AC 120/230 V (50/60 Hz) | AC 100-240 V (50/60 Hz) |
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Output | - | 65 Watt |
INPUT | Lenovo ThinkPad T590 (20N4) | Lenovo ThinkBook 15 G4 IAP (21DJ) |
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Type | Keyboard, TrackPoint, UltraNav | Keyboard, touchpad |
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Numeric Keypad | Yes | Yes |
Keyboard Backlight | - | Yes |
Features | Spill-resistant, multi-touch touchpad, buttonless touchpad | Spill-resistant, multi-touch touchpad, buttonless touchpad, precision touchpad |
CONNECTIONS & EXPANSIONS | Lenovo ThinkPad T590 (20N4) | Lenovo ThinkBook 15 G4 IAP (21DJ) |
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Interfaces | USB 3.1 Gen 1 USB 3.1 Gen 1 (Always On) USB-C 3.1 Gen 1 (supports DisplayPort Alt Mode) (Power Delivery) USB-C 3.1 Gen 2 (supports Thunderbolt 3, DisplayPort Alt Mode) HDMI LAN Headphone/microphone combo jack Dock |
2 x USB-C 3.2 Gen 2 (supports DisplayPort 1.4 Alt Mode) (Power Delivery 3.0) USB 3.2 Gen 1 (Always On) USB 3.2 Gen 1 USB4 (supports Thunderbolt 4, DisplayPort 1.4 Alt Mode) (Power Delivery 3.0) HDMI LAN Headphone/microphone combo jack |
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Memory Card Reader | Yes (microSD) | 4 in 1 (SD Card, MultiMediaCard, SDHC Card, SDXC Card) |
SOFTWARE | Lenovo ThinkPad T590 (20N4) | Lenovo ThinkBook 15 G4 IAP (21DJ) |
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Operating System (OS) | No operating system | Windows 11 Pro - English |
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Software Included | - | Microsoft Office (Trial) |
MISCELLANEOUS | Lenovo ThinkPad T590 (20N4) | Lenovo ThinkBook 15 G4 IAP (21DJ) |
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Dockable | Yes | - |
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Included Accessories | USB-C power adapter | USB-C slim wall mount power adapter |
Security | Trusted Platform Module (TPM 2.0) Security Chip | Firmware Trusted Platform Module (TPM 2.0) Security Chip, fingerprint reader |
Security Slot Type | Kensington security slot | Kensington nano security slot |
Theft/Intrusion Protection | Security lock slot (cable lock sold separately) | Security lock slot (cable lock sold separately) |
Features | Administrator password, hard drive password, power-on password, RapidCharge, MIL-STD-810G tested | Administrator password, hard drive password, power-on password, MIL-STD-810H tested, Rapid Charge Pro |
Compliant Standards | RoHS | RoHS, Energy-Related Products (ErP) Lot 3, TUV Rheinland Low Blue Light (Software Solution) |
ENERGY STAR Certified | Yes | Yes |
EPEAT Compliant | EPEAT Gold | EPEAT Gold |
Max Operating Temperature | - | 35 °C |
Min Operating Temperature | - | 5 °C |
Humidity Range Operating | - | 8 - 95% |
Manufacturer Warranty | - | Limited warranty - 1 year - pick-up and return |