Detailed comparison and review of Lenovo ThinkPad L15 Gen 3 (21C4) and ASUS R521JA (EJ974T). With our comprehensive overview, you can simply compare dimensions, performance, storage, functions, but also other key features of both laptops and easily decide which one is the right choice for you. Our goal is to help you identify the main differences between products and find the laptop that best fits your needs and expectations.
Advantages and disadvantages of Lenovo ThinkPad L15 Gen 3 (21C4) based on its technical characteristics, features, user experience, expert reviews and price level.
robust build quality
excellent keyboard comfort
good battery life
solid performance
adequate port selection
average display brightness
heavier than competitors
limited graphics performance
no thunderbolt support
Advantages and disadvantages of ASUS R521JA (EJ974T) based on its technical characteristics, features, user experience, expert reviews and price level.
affordable price
solid build quality
lightweight design
decent battery life
adequate performance
average display quality
limited storage capacity
no backlit keyboard
basic graphics card
| DESIGN AND DIMENSIONS | Lenovo ThinkPad L15 Gen 3 (21C4) | ASUS R521JA (EJ974T) |
|---|
| Product Type | Notebook - 180-degree hinge design | Notebook |
|---|---|---|
| Dimensions (WxDxH) | 36.02 cm x 23.7 cm x 1.993 cm | 36 cm x 23.5 cm x 2.29 cm |
| Weight | 1.76 kg | 1.9 kg |
| Case Material | Polycarbonate ABS (bottom), polycarbonate ABS (top) | - |
| Colour | Thunder black | Transparent silver |
| DISPLAY | Lenovo ThinkPad L15 Gen 3 (21C4) | ASUS R521JA (EJ974T) |
|---|
| Screen Size (Type) | 15.6" - IPS | 15.6" |
|---|---|---|
| LCD Backlight Technology | LED backlight | - |
| Screen Resolution | 1920 x 1080 (Full HD) | 1920 x 1080 (Full HD) |
| V-Sync Rate at Max Res. | - | 60 Hz |
| Widescreen | Yes | Yes |
| Image Aspect Ratio | 16:9 | 16:9 |
| Image Brightness | 250 cd/m² | 200 cd/m² |
| Colour Gamut | 45% NTSC | 45% NTSC |
| Features | Anti-glare, 170° viewing angle | Anti-glare, 83% screen-to-body ratio |
| PROCESSOR | Lenovo ThinkPad L15 Gen 3 (21C4) | ASUS R521JA (EJ974T) |
|---|
| CPU | Intel Core i5 (12th Gen) 1235U / 1.3 GHz | Intel Core i5 (10th Gen) 1035G1 / 1 GHz |
|---|---|---|
| Max Turbo Speed | 4.4 GHz | 3.6 GHz |
| Number of Cores | 10-core | Quad-Core |
| Cache | 12 MB | 6 MB |
| Features | Integrated memory controller | - |
| MEMORY | Lenovo ThinkPad L15 Gen 3 (21C4) | ASUS R521JA (EJ974T) |
|---|
| RAM | 16 GB (1 x 16 GB) | 4 GB (provided memory is soldered) |
|---|---|---|
| Max RAM Supported | 64 GB | - |
| RAM Type | DDR4 SDRAM | DDR4 SDRAM |
| Speed | 3200 MHz | - |
| Rated Speed | 3200 MHz | - |
| Form Factor | SO-DIMM 260-pin | - |
| Slots Qty | 2 | - |
| Empty Slots | 1 | - |
| STORAGE | Lenovo ThinkPad L15 Gen 3 (21C4) | ASUS R521JA (EJ974T) |
|---|
| Main Storage Size (HDD/SSD) | 512 GB SSD M.2 2242 PCIe 4.0 x4 - TCG Opal Encryption - Kioxia | 512 GB SSD M.2 PCIe 3.0 - NVM Express (NVMe) |
|---|
| AUDIO & VIDEO | Lenovo ThinkPad L15 Gen 3 (21C4) | ASUS R521JA (EJ974T) |
|---|
| Graphics Processor (GPU) | Intel Iris Xe Graphics | Intel UHD Graphics |
|---|---|---|
| Max Monitors Supported | 3 external monitor(s) | - |
| Camera | Yes - 1080p | Yes - VGA |
| Camera Features | Privacy shutter, IR camera, Windows Hello, fixed focus | - |
| Sound | Stereo speakers, dual array microphone | Speaker, microphone |
| Codec | Realtek ALC3287 | - |
| Compliant Standards | High Definition Audio, Dolby Audio | - |
| Audio Features | - | Output: ASUS SonicMaster |
| COMMUNICATIONS | Lenovo ThinkPad L15 Gen 3 (21C4) | ASUS R521JA (EJ974T) |
|---|
| Wireless | 802.11a/b/g/n/ac/ax, Bluetooth 5.2 | 802.11a/b/g/n/ac, Bluetooth 4.1 |
|---|---|---|
| Wireless Controller | Intel Wi-Fi 6 AX 201 | - |
| Network Interface | Gigabit Ethernet | - |
| Features | - | Single stream (1x1) |
| BATTERY | Lenovo ThinkPad L15 Gen 3 (21C4) | ASUS R521JA (EJ974T) |
|---|
| Technology | 3-cell lithium polymer | 2-cell Lithium Ion |
|---|---|---|
| Battery Capacity (Size) | 57 Wh | 32 Wh |
| AC ADAPTER | Lenovo ThinkPad L15 Gen 3 (21C4) | ASUS R521JA (EJ974T) |
|---|
| Input | AC 100-240 V (50/60 Hz) | AC 100-240 V (50/60 Hz) |
|---|---|---|
| Output | 65 Watt, 5 / 9 / 15 / 20 V | 45 Watt, 19 V, 2.37 A |
| INPUT | Lenovo ThinkPad L15 Gen 3 (21C4) | ASUS R521JA (EJ974T) |
|---|
| Type | Keyboard, TrackPoint, UltraNav | Keyboard, touchpad |
|---|---|---|
| Numeric Keypad | Yes | Yes |
| Keyboard Backlight | Yes | - |
| Features | Spill-resistant, multi-touch touchpad, Fn keys with Unified Communications controls | Chiclet keyboard |
| CONNECTIONS & EXPANSIONS | Lenovo ThinkPad L15 Gen 3 (21C4) | ASUS R521JA (EJ974T) |
|---|
| Interfaces | USB 3.2 Gen 1 USB 3.2 Gen 1 (Always On) USB-C 3.2 Gen 1 (supports DisplayPort 1.4 Alt Mode) (Power Delivery 3.0) USB4 (supports Thunderbolt 4, DisplayPort 1.4 Alt Mode) (Power Delivery 3.0) Headphone/microphone combo jack LAN |
USB 3.2 Gen 1 USB-C 3.2 Gen 1 2 x USB 2.0 HDMI Headphone/microphone combo jack |
|---|---|---|
| Memory Card Reader | Yes (microSD) | Yes (microSD) |
| SOFTWARE | Lenovo ThinkPad L15 Gen 3 (21C4) | ASUS R521JA (EJ974T) |
|---|
| Operating System (OS) | Windows 10 Pro 64-bit Edition (available through downgrade rights from Windows 11 Pro) + Windows 11 Pro Licence | Windows 10 Home |
|---|
| MISCELLANEOUS | Lenovo ThinkPad L15 Gen 3 (21C4) | ASUS R521JA (EJ974T) |
|---|
| Included Accessories | USB-C power adapter | Power adapter |
|---|---|---|
| Security | Discrete Trusted Platform Module (TPM 2.0) Security Chip, fingerprint reader | Firmware Trusted Platform Module (TPM) Security Chip |
| Security Slot Type | Kensington nano security slot | - |
| Theft/Intrusion Protection | Security lock slot (cable lock sold separately) | - |
| Features | Administrator password, power-on password, RapidCharge, MIL-STD-810H tested, self-healing BIOS, NVMe password | - |
| Compliant Standards | RoHS, Energy-Related Products (ErP) Lot 3, TCG Certified | - |
| ENERGY STAR Certified | Yes | - |
| EPEAT Compliant | EPEAT Gold | - |
| Max Operating Temperature | 35 °C | - |
| Min Operating Temperature | 5 °C | - |
| Humidity Range Operating | 8 - 95% | - |
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