Side by side comparison and review of Lenovo ThinkPad E15 Gen 4 (21ED) and ASUS Zenbook 15 OLED (UM3504DA). Compare dimensions, processors, batteries, storage capacities and other key specifications and features to simplify the choice of your perfect laptop. Our goal is to make it easier for you to decide on the laptop that will best meet your expectations by revealing the main differences between the products.
Advantages and disadvantages of Lenovo ThinkPad E15 Gen 4 (21ED) based on its technical characteristics, features, user experience, expert reviews and price level.
robust build quality
efficient performance
comfortable keyboard
good security features
affordable price
average display quality
limited graphics power
moderate battery life
noisy under load
Advantages and disadvantages of ASUS Zenbook 15 OLED (UM3504DA) based on its technical characteristics, features, user experience, expert reviews and price level.
vibrant oled display
lightweight and portable
powerful ryzen processor
ample storage options
good battery life
limited port selection
no dedicated gpu
higher price segment
average speaker quality
| DESIGN AND DIMENSIONS | Lenovo ThinkPad E15 Gen 4 (21ED) | ASUS Zenbook 15 OLED (UM3504DA) |
|---|
| Product Type | Notebook | Notebook - 180-degree hinge design |
|---|---|---|
| Dimensions (WxDxH) | 36.5 cm x 24 cm x 1.89 cm | 35.38 cm x 22.66 cm x 1.58 cm |
| Dimensions (WxDxH) / Weight Details | - | 45.5 cm x 29 cm x 7.3 cm / 3.67 kg |
| Weight | 1.78 kg | 1.4 kg |
| Case Material | Aluminium (top), polycarbonate ABS (bottom) | Aluminum |
| Colour | Black | Ponder blue |
| DISPLAY | Lenovo ThinkPad E15 Gen 4 (21ED) | ASUS Zenbook 15 OLED (UM3504DA) |
|---|
| Screen Size (Type) | 15.6" - IPS | 15.6" OLED |
|---|---|---|
| LCD Backlight Technology | LED backlight | - |
| Screen Resolution | 1920 x 1080 (Full HD) | 2880 x 1620 (2.8K) |
| V-Sync Rate at Max Res. | - | 120 Hz |
| Widescreen | Yes | Yes |
| Image Aspect Ratio | 16:9 | 16:9 |
| Image Brightness | 300 cd/m² | 600 cd/m² |
| Colour Gamut | - | 100% DCI-P3 |
| Colour Support | - | 1.07 billion colours |
| Features | Anti-glare, 170° viewing angle | NanoEdge display, Pantone Validated, 86% screen-to-body ratio, 0.2 ms response rate, HDR 600 True Black, VESA DisplayHDR |
| PROCESSOR | Lenovo ThinkPad E15 Gen 4 (21ED) | ASUS Zenbook 15 OLED (UM3504DA) |
|---|
| CPU | AMD Ryzen 5 5625U / 2.3 GHz | AMD Ryzen 7 7735U / 2.7 GHz |
|---|---|---|
| Max Turbo Speed | 4.3 GHz | 4.75 GHz |
| Number of Cores | 6-core | 8-core |
| Cache | L3 - 16 MB | L3 - 16 MB |
| Features | Integrated memory controller | - |
| MEMORY | Lenovo ThinkPad E15 Gen 4 (21ED) | ASUS Zenbook 15 OLED (UM3504DA) |
|---|
| RAM | 8 GB (provided memory is soldered) | 16 GB (provided memory is soldered) |
|---|---|---|
| Max RAM Supported | 40 GB | - |
| RAM Type | DDR4 SDRAM | LPDDR5 SDRAM |
| Speed | 3200 MHz | - |
| Rated Speed | 3200 MHz | - |
| Form Factor | SO-DIMM 260-pin | - |
| Slots Qty | 1 | - |
| Empty Slots | 1 | - |
| STORAGE | Lenovo ThinkPad E15 Gen 4 (21ED) | ASUS Zenbook 15 OLED (UM3504DA) |
|---|
| Main Storage Size (HDD/SSD) | 256 GB SSD M.2 2242 PCIe 4.0 x4 - TCG Opal Encryption 2, NVM Express (NVMe) | 512 GB SSD M.2 PCIe 4.0 - NVM Express (NVMe) |
|---|
| AUDIO & VIDEO | Lenovo ThinkPad E15 Gen 4 (21ED) | ASUS Zenbook 15 OLED (UM3504DA) |
|---|
| Graphics Processor (GPU) | AMD Radeon Graphics | AMD Radeon 680M |
|---|---|---|
| Max Monitors Supported | 2 external monitor(s) | - |
| Camera | Yes - 1080p | Yes - Full HD |
| Camera Features | Privacy shutter, IR camera, Windows Hello, fixed focus | IR camera, Windows Hello, ASUS AiSense Camera |
| Sound | Stereo speakers, dual array microphone | Harman/kardon stereo speakers, array microphone |
| Codec | Realtek ALC3287 | - |
| Compliant Standards | High Definition Audio, Dolby Audio | Dolby Atmos |
| Audio Features | Harman-branded | Output: Smart Amplification technology, Asus Audio Booster; Input: AI noise cancelling |
| COMMUNICATIONS | Lenovo ThinkPad E15 Gen 4 (21ED) | ASUS Zenbook 15 OLED (UM3504DA) |
|---|
| Wireless | 802.11a/b/g/n/ac/ax, Bluetooth 5.2 | 802.11a/b/g/n/ac/ax (Wi-Fi 6E), Bluetooth 5.3 |
|---|---|---|
| Wireless Controller | M.2 Card | - |
| Network Interface | Gigabit Ethernet | - |
| Ethernet Controller | Realtek RTL8111H-CG | - |
| Features | Wake-on-LAN (WOL), dual stream (2x2) | Single stream (1x1) |
| BATTERY | Lenovo ThinkPad E15 Gen 4 (21ED) | ASUS Zenbook 15 OLED (UM3504DA) |
|---|
| Technology | Lithium polymer | 4-cell Lithium Ion |
|---|---|---|
| Battery Capacity (Size) | 57 Wh | 67 Wh |
| Battery Life | Up to 16.5 hours | - |
| AC ADAPTER | Lenovo ThinkPad E15 Gen 4 (21ED) | ASUS Zenbook 15 OLED (UM3504DA) |
|---|
| Input | AC 100-240 V (50/60 Hz) | AC 100-240 V (50/60 Hz) |
|---|---|---|
| Output | 65 Watt | 65 Watt, 20 V, 3.25 A |
| INPUT | Lenovo ThinkPad E15 Gen 4 (21ED) | ASUS Zenbook 15 OLED (UM3504DA) |
|---|
| Type | Keyboard, TrackPoint, UltraNav | Keyboard, touchpad |
|---|---|---|
| Numeric Keypad | Yes | Yes |
| Keyboard Backlight | Yes | Yes |
| Features | Spill-resistant, multi-touch touchpad, Fn keys with Unified Communications controls | Spill-resistant, chiclet keyboard, 1.4mm travel distance, ASUS ErgoSense |
| CONNECTIONS & EXPANSIONS | Lenovo ThinkPad E15 Gen 4 (21ED) | ASUS Zenbook 15 OLED (UM3504DA) |
|---|
| Slots | 2 x M.2 Card (1 free) | - |
|---|---|---|
| Interfaces | USB 2.0 USB 3.2 Gen 1 (Always On) USB-C 3.2 Gen 1 (supports DisplayPort 1.2 Alt Mode) (Power Delivery 3.0) HDMI LAN Headphone/microphone combo jack |
HDMI 2.1 Headphone/microphone combo jack USB-C 4.0 Gen 3/DisplayPort (Power Delivery) USB-C 3.2 Gen 2 (supports DisplayPort Alt Mode) (Power Delivery) USB 3.2 Gen 1 |
| SOFTWARE | Lenovo ThinkPad E15 Gen 4 (21ED) | ASUS Zenbook 15 OLED (UM3504DA) |
|---|
| Operating System (OS) | Windows 11 Pro - English | Windows 11 Home |
|---|---|---|
| Software Included | - | MyASUS, ScreenXpert, GlideX |
| MISCELLANEOUS | Lenovo ThinkPad E15 Gen 4 (21ED) | ASUS Zenbook 15 OLED (UM3504DA) |
|---|
| Included Accessories | USB-C power adapter | USB-C power adapter |
|---|---|---|
| Security | Discrete Trusted Platform Module (TPM 2.0) Security Chip, fingerprint reader | Trusted Platform Module (TPM 2.0) Security Chip |
| Security Slot Type | Kensington security slot | - |
| Theft/Intrusion Protection | Security lock slot (cable lock sold separately) | - |
| Features | Administrator password, power-on password, MIL-STD-810H tested, self-healing BIOS, NVMe password | MIL-STD-810H tested, Cortana support, ASUS Antimicrobial Guard Plus |
| Compliant Standards | RoHS, Energy-Related Products (ErP) Lot 3, TCG Certified, TUV Rheinland Low Blue Light (Software Solution) | RoHS, REACH, ISO 22196, TUV Rheinland Low Blue Light Certification, TUV Rheinland Flicker Free Certification, SGS Eye Care Display Certification, ISO 21702 |
| ENERGY STAR Certified | Yes | - |
| EPEAT Compliant | EPEAT Gold | - |
| Max Operating Temperature | 35 °C | 49 °C |
| Min Operating Temperature | 5 °C | -37 °C |
| Humidity Range Operating | 8 - 95% | 95% RH |
| Manufacturer Warranty | Base warranty - 1 year - pick-up and return Extended warranty - 1 year - on-site |
- |
| Model Number | - | NX015W |
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