Detailed comparison and review of Acer Extensa 15 (EX215-51) and Lenovo ThinkPad X1 Extreme Gen 5 (21DE). 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 Acer Extensa 15 (EX215-51) based on its technical characteristics, features, user experience, expert reviews and price level.
affordable price
solid build quality
decent battery life
adequate performance
lightweight design
average display quality
limited storage capacity
no backlit keyboard
basic graphics capabilities
Advantages and disadvantages of Lenovo ThinkPad X1 Extreme Gen 5 (21DE) based on its technical characteristics, features, user experience, expert reviews and price level.
powerful intel processors
robust build quality
excellent 4k display
advanced security features
wide connectivity options
high price point
heavier than competitors
average battery life
loud under load
| DESIGN AND DIMENSIONS | Acer Extensa 15 (EX215-51) | Lenovo ThinkPad X1 Extreme Gen 5 (21DE) |
|---|
| Product Type | Notebook | Notebook |
|---|---|---|
| Dimensions (WxDxH) | 36.34 cm x 25.05 cm x 1.99 cm | 35.95 cm x 25.38 cm x 1.79 cm |
| Weight | 1.9 kg | 1.88 kg |
| Case Material | - | Aluminium (bottom), carbon fibre (top) |
| Colour | Shale black | Black paint |
| DISPLAY | Acer Extensa 15 (EX215-51) | Lenovo ThinkPad X1 Extreme Gen 5 (21DE) |
|---|
| Screen Size (Type) | 15.6" | 16" - IPS |
|---|---|---|
| LCD Backlight Technology | LED backlight | LED backlight |
| Screen Resolution | 1920 x 1080 (Full HD) | 2560 x 1600 (WQXGA) |
| V-Sync Rate at Max Res. | - | 165 Hz |
| Widescreen | Yes | Yes |
| Image Aspect Ratio | 16:9 | 16:10 |
| Image Brightness | 220 cd/m² | 500 cd/m² |
| Colour Gamut | - | 100% sRGB |
| Features | Anti-glare, ComfyView, 8 ms response rate, Narrow Border Display | Anti-glare, 178° viewing angle, Low Blue Light technology, X-Rite Pantone factory color calibration |
| PROCESSOR | Acer Extensa 15 (EX215-51) | Lenovo ThinkPad X1 Extreme Gen 5 (21DE) |
|---|
| CPU | Intel Core i3 (10th Gen) 10110U / 2.1 GHz | Intel Core i7 (12th Gen) 12700H / 2.3 GHz |
|---|---|---|
| Max Turbo Speed | 4.1 GHz | 4.7 GHz |
| Number of Cores | Dual-Core | 14-core |
| Cache | 4 MB | 24 MB |
| 64-bit Computing | Yes | - |
| Features | Intel Turbo Boost Technology 2.0 | Integrated memory controller |
| MEMORY | Acer Extensa 15 (EX215-51) | Lenovo ThinkPad X1 Extreme Gen 5 (21DE) |
|---|
| RAM | 4 GB (4 GB (soldered)) | 16 GB (1 x 16 GB) |
|---|---|---|
| Max RAM Supported | 12 GB | 64 GB |
| RAM Type | DDR4 SDRAM | DDR5 SDRAM |
| Speed | - | 4800 MHz |
| Rated Speed | - | 4800 MHz |
| Form Factor | SO-DIMM 260-pin | SO-DIMM 262-pin |
| Slots Qty | 1 | 2 |
| Empty Slots | 1 | 1 |
| STORAGE | Acer Extensa 15 (EX215-51) | Lenovo ThinkPad X1 Extreme Gen 5 (21DE) |
|---|
| Main Storage Size (HDD/SSD) | 128 GB SSD - Kingston | 512 GB SSD M.2 2280 PCIe 4.0 x4 - TCG Opal Encryption 2, NVM Express (NVMe), Performance |
|---|
| AUDIO & VIDEO | Acer Extensa 15 (EX215-51) | Lenovo ThinkPad X1 Extreme Gen 5 (21DE) |
|---|
| Multi-GPU Configuration | - | 1 single GPU card / integrated GPU |
|---|---|---|
| Graphics Processor (GPU) | Intel UHD Graphics | NVIDIA GeForce RTX 3050 Ti / Intel Iris Xe Graphics |
| Memory Allocation Technology | Shared Video Memory (UMA) | - |
| Max Monitors Supported | - | 4 external monitor(s) |
| Video Memory | - | 4 GB GDDR6 SDRAM |
| Camera | Yes - HD | Yes - 1080p |
| Camera Features | - | Privacy shutter, IR camera, Windows Hello, fixed focus |
| Sound | Stereo speakers, two microphones | Stereo speakers, dual array microphone |
| Codec | - | Realtek ALC3306 |
| Compliant Standards | - | High Definition Audio, Dolby Audio Premium, Dolby Voice |
| COMMUNICATIONS | Acer Extensa 15 (EX215-51) | Lenovo ThinkPad X1 Extreme Gen 5 (21DE) |
|---|
| Wireless | Bluetooth, 802.11a/b/g/n/ac | NFC, Bluetooth 5.2, 802.11a/b/g/n/ac/ax (Wi-Fi 6E) |
|---|---|---|
| Wireless Controller | - | Intel Wi-Fi 6E AX 211 |
| Network Interface | Gigabit Ethernet | - |
| Features | Wake-on-LAN (WOL) | Dual stream (2x2) |
| BATTERY | Acer Extensa 15 (EX215-51) | Lenovo ThinkPad X1 Extreme Gen 5 (21DE) |
|---|
| Technology | Lithium Ion | Lithium polymer |
|---|---|---|
| Battery Capacity (Size) | 48 Wh | 90 Wh |
| AC ADAPTER | Acer Extensa 15 (EX215-51) | Lenovo ThinkPad X1 Extreme Gen 5 (21DE) |
|---|
| Input | AC 120/230 V (50/60 Hz) | AC 100-240 V (50/60 Hz) |
|---|---|---|
| Output | 45 Watt, 19 V | 170 Watt |
| INPUT | Acer Extensa 15 (EX215-51) | Lenovo ThinkPad X1 Extreme Gen 5 (21DE) |
|---|
| Type | Keyboard, touchpad | Keyboard, TrackPoint, UltraNav |
|---|---|---|
| Numeric Keypad | Yes | - |
| Keyboard Backlight | - | Yes |
| Features | Multi-gesture touch pad, Acer FineTip keyboard, precision touchpad | Spill-resistant, multi-touch touchpad, Fn keys with Unified Communications controls, glass touchpad |
| CONNECTIONS & EXPANSIONS | Acer Extensa 15 (EX215-51) | Lenovo ThinkPad X1 Extreme Gen 5 (21DE) |
|---|
| Slots | - | 2 x M.2 (PCI Express 4.0 x4) (1 free) |
|---|---|---|
| Interfaces | HDMI USB 3.1 Gen 1 2 x USB 2.0 LAN Headphone/microphone combo jack |
USB 3.2 Gen 1 USB 3.2 Gen 1 (Always On) 2 x USB4 (supports Thunderbolt 4, DisplayPort 1.4 Alt Mode) (Power Delivery 3.0) HDMI Headphone/microphone combo jack |
| Memory Card Reader | - | Yes (SD Express Card) |
| SOFTWARE | Acer Extensa 15 (EX215-51) | Lenovo ThinkPad X1 Extreme Gen 5 (21DE) |
|---|
| Operating System (OS) | Windows 10 Home 64-bit Edition in S mode | Windows 10 Pro 64-bit Edition (available through downgrade rights from Windows 11 Pro) + Windows 11 Pro Licence - German |
|---|---|---|
| Software Included | - | Glance by Mirametrix |
| MISCELLANEOUS | Acer Extensa 15 (EX215-51) | Lenovo ThinkPad X1 Extreme Gen 5 (21DE) |
|---|
| Included Accessories | Power adapter, HDD kit | Power adapter |
|---|---|---|
| Security | - | Discrete 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 | MU-MIMO technology | Administrator password, system password, power-on password, RapidCharge, MIL-STD-810H tested, NVMe password, USB FIDO (Fast Identity Online) device integration, Firmware Resiliency 3.0, certificate based BIOS authentication |
| Compliant Standards | - | RoHS, Energy-Related Products (ErP) Lot 3, TCG Certified, TÜV Rheinland Low Blue Light Method 2 |
| ENERGY STAR Certified | - | Yes |
| EPEAT Compliant | - | EPEAT Gold |
| TCO Certified | - | TCO Certified Notebooks 9 |
| Max Operating Temperature | - | 35 °C |
| Min Operating Temperature | - | 5 °C |
| Humidity Range Operating | - | 8 - 95% |
| Manufacturer Warranty | Limited warranty - 1 year - carry-in International travellers warranty - 1 year |
Base warranty - 3 years - pick-up and return Base warranty - battery - 1 year Extended warranty - 3 years - on-site |
| Model Number | 39SK | - |
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