Acer Aspire 15 A15-51 vs Lenovo IdeaPad Slim 3i 14 Gen 10
Acer Aspire 15 A15-51 wins 8 of the 12 categories we compared, against 3 for Lenovo IdeaPad Slim 3i 14 Gen 10 (1 tied) — including overall score (4.4/10 vs 4.1/10).
Acer Aspire 15 A15-51 vs Lenovo IdeaPad Slim 3i 14 Gen 10: our verdict
IdeaPad Slim 3 is for buyers who want a lighter, more portable laptop with a sleeker design, extra connectivity, and the flexibility to choose from a wider range of CPUs, RAM, and storage options. If you care most about raw performance, battery life, or a brighter screen, skip it. The main reason to hesitate: you give up both speed and battery life for the lower price.
Aspire is built for anyone who wants the best performance, graphics, and battery life in this price range, with a sharper 15.6-inch 1080p panel and a more comfortable keyboard for daily work.
Summarised from our video comparison of these two laptops.
Watch the video comparison
Acer Aspire 15 A15-51 vs Lenovo IdeaPad Slim 3i 14 Gen 10: Overall Score
| Spec |
 Acer Aspire 15 A15-51
|
 Lenovo IdeaPad Slim 3i 14 Gen 10
|
|---|---|---|
| Overall score | 4.4/10 | 4.1/10 |
Acer Aspire 15 A15-51 vs Lenovo IdeaPad Slim 3i 14 Gen 10: Build & Design
| Spec |
Acer Aspire 15 A15-51
|
Lenovo IdeaPad Slim 3i 14 Gen 10
|
|---|---|---|
| Portability score | 7.1/10 | 8.8/10 |
| Weight | 1.77 kg | 1.29 kg |
| Thickness | 17.9 mm | 17.9 mm |
| Fingerprint reader | Yes | No |
| Vapor chamber cooling | No | No |
| Numeric keypad | Yes | No |
| Windows Precision touchpad | Yes | Yes |
| Build material | Aluminum | Aluminum |
| Available colors | Gray | Gray, Blue |
| Keyboard | Backlit, Island | Island |
| Key travel | 1.4 mm | 1.3 mm |
| Cooling system | Active | Active |
| Dimensions | 362.9 x 237.5 x 17.9 mm | 314.4 x 222.1 x 16.9-17.9 mm 12.38 x 8.74 x 0.67-0.7 inches |
| Footprint | 862 cm2 (133.6 inches2) | 698 cm2 (108.2 inches2) |
| Touchpad size | — | 12.0 x 7.5 cm |
| Touchpad surface | Plastic | Plastic |
Acer Aspire 15 A15-51 vs Lenovo IdeaPad Slim 3i 14 Gen 10: Benchmarks
| Spec |
Acer Aspire 15 A15-51
|
Lenovo IdeaPad Slim 3i 14 Gen 10
|
|---|---|---|
| Performance score | 5/10 | 3.2/10 |
| Cinebench (multi-core) | 369 | 214 |
| Cinebench (single-core) | 106 | 59 |
| Geekbench (multi-core) | 6302 | 2914 |
| Geekbench (single-core) | 2436 | 1222 |
Acer Aspire 15 A15-51 vs Lenovo IdeaPad Slim 3i 14 Gen 10: CPU
| Spec |
Acer Aspire 15 A15-51
|
Lenovo IdeaPad Slim 3i 14 Gen 10
|
|---|---|---|
| CPU threads | 8 | 4 |
| CPU | Intel Core 3 100U | Intel Processor N150 |
| CPU cores | 6 (2P + 4E) | 4 (0P + 4E) |
| CPU base frequency | 1.2 GHz | 0 GHz |
| CPU turbo frequency | 4.7 GHz | — |
| CPU L3 cache | 10 MB | 6 MB |
| CPU manufacturing process | 10 nm | 10 nm |
| CPU configurations available | Intel Core 3 100U Intel Core 5 120U Intel Core 7 150U | Intel Processor N150 Intel Processor N250 Intel Core 3 N355 Intel Core i5 13420H Intel Core i7 13620H Intel Core 5 210H Intel Core 7 240H AMD Ryzen 5 7535HS AMD Ryzen 7 7735HS |
Acer Aspire 15 A15-51 vs Lenovo IdeaPad Slim 3i 14 Gen 10: GPU
| Spec |
Acer Aspire 15 A15-51
|
Lenovo IdeaPad Slim 3i 14 Gen 10
|
|---|---|---|
| GPU compute | 1.3 TFLOPS | 0.4 TFLOPS |
| GPU | Intel UHD Graphics (64 EU) | Intel UHD Graphics 730 |
| GPU type | Integrated | Integrated |
| Integrated GPU | Intel UHD Graphics (64 EU) | Intel UHD Graphics 730 |
| GPU VRAM | System Shared | System Shared |
| GPU memory type | LPDDR5 | DDR5 |
| GPU base clock | 300 MHz | 300 MHz |
| GPU boost clock | 1250 MHz | 1000 MHz |
| GPU power (TGP) | 15 W | 15 W |
| GPU configurations available | Intel UHD Graphics (64 EU) | Intel UHD Graphics 730 |
Acer Aspire 15 A15-51 vs Lenovo IdeaPad Slim 3i 14 Gen 10: Memory
| Spec |
Acer Aspire 15 A15-51
|
Lenovo IdeaPad Slim 3i 14 Gen 10
|
|---|---|---|
| RAM | 8 GB | 8 GB |
| RAM upgradable | No | No |
| RAM type | LPDDR5 | DDR5 |
| RAM clock speed | 6400 MHz | 4800 MHz |
| RAM slots | 1 | 2 |
| RAM channels | 1x8 GB | 1x8 GB |
| RAM configurations available | 8GB|16GB | 8GB|16GB|24GB |
Acer Aspire 15 A15-51 vs Lenovo IdeaPad Slim 3i 14 Gen 10: Storage
| Spec |
Acer Aspire 15 A15-51
|
Lenovo IdeaPad Slim 3i 14 Gen 10
|
|---|---|---|
| Storage | 256 GB | 128 GB |
| NVMe storage | Yes | Yes |
| Storage upgradable | Yes | Yes |
| Storage type | SSD (M2) | NVMe |
| Storage interface | PCI-E Gen 4.0 (4x) | PCI-E Gen 4.0 (4x) |
| Storage configurations available | 256GB, 512GB, 1 TB | 128GB, 256GB, 512GB, 1 TB |
Acer Aspire 15 A15-51 vs Lenovo IdeaPad Slim 3i 14 Gen 10: Display
| Spec |
Acer Aspire 15 A15-51
|
Lenovo IdeaPad Slim 3i 14 Gen 10
|
|---|---|---|
| Display score | 2.4/10 | 2.6/10 |
| Display size | 15.6 in | 14 in |
| Refresh rate | 60 Hz | 60 Hz |
| Brightness | 300 nits | 250 nits |
| Pixel density | 141 ppi | 157 ppi |
| Touchscreen | No | No |
| HDR support | No | No |
| Display type | TN LCD | TN LCD |
| Resolution | 1920 x 1080 | 1920 x 1080 |
| Screen coating | Matte | Matte |
| Aspect ratio | 16:9 | 16:9 |
| Screen-to-body ratio | ~77.9% | ~77.4% |
| Side bezels | 8.8 mm | 2.3 mm |
Acer Aspire 15 A15-51 vs Lenovo IdeaPad Slim 3i 14 Gen 10: Battery
| Spec |
Acer Aspire 15 A15-51
|
Lenovo IdeaPad Slim 3i 14 Gen 10
|
|---|---|---|
| Battery score | 6.4/10 | 6.3/10 |
| Battery capacity | 53 Wh | 47 Wh |
| Charging speed | 65 W | 65 W |
| Wireless charging | No | No |
| Charging port | USB-C | USB-C |
| Proprietary charging | Yes | Yes |
| Battery type | Li-Ion | Li-Po |
| Full charge time | 1:35 hr | — |
Acer Aspire 15 A15-51 vs Lenovo IdeaPad Slim 3i 14 Gen 10: Network & Connectivity
| Spec |
Acer Aspire 15 A15-51
|
Lenovo IdeaPad Slim 3i 14 Gen 10
|
|---|---|---|
| Connectivity score | 6.1/10 | 6.2/10 |
| Wi-Fi generation | 6 | 7 |
| Bluetooth version | 5.3 | 5.4 |
| Thunderbolt | No | No |
| Ethernet port | No | No |
| HDMI port | Yes | Yes |
| DisplayPort | No | No |
| SD card reader | No | Yes |
| USB-A ports | 2x USB 3.2 | 2x USB 3.2 |
| USB-C ports | 1x USB 4.0 | 1x USB 3.2 |
Acer Aspire 15 A15-51 vs Lenovo IdeaPad Slim 3i 14 Gen 10: Audio
| Spec |
Acer Aspire 15 A15-51
|
Lenovo IdeaPad Slim 3i 14 Gen 10
|
|---|---|---|
| Dolby Atmos | No | Yes |
| Speaker configuration | 2.0 | 2.0 |
| Speaker power | — | 2x2W |
Acer Aspire 15 A15-51 vs Lenovo IdeaPad Slim 3i 14 Gen 10: OS & Software
| Spec |
Acer Aspire 15 A15-51
|
Lenovo IdeaPad Slim 3i 14 Gen 10
|
|---|---|---|
| Operating system | Windows 11 | Windows 11 |
Acer Aspire 15 A15-51 vs Lenovo IdeaPad Slim 3i 14 Gen 10: Extras & Features
| Spec |
Acer Aspire 15 A15-51
|
Lenovo IdeaPad Slim 3i 14 Gen 10
|
|---|---|---|
| 2-in-1 convertible | No | No |
| Webcam | 1080p FHD | 1080p FHD |
| Webcam position | Above the display | Above the display |
Where each laptop wins
Acer Aspire 15 A15-51
- Overall score: 4.4/10 (vs 4.1/10)
- Performance score: 5/10 (vs 3.2/10)
- Battery score: 6.4/10 (vs 6.3/10)
- Cinebench (multi-core): 369 (vs 214)
- Cinebench (single-core): 106 (vs 59)
- Geekbench (multi-core): 6302 (vs 2914)
- Geekbench (single-core): 2436 (vs 1222)
- CPU threads: 8 (vs 4)
- GPU compute: 1.3 TFLOPS (vs 0.4 TFLOPS)
- Storage: 256 GB (vs 128 GB)
- Display size: 15.6 in (vs 14 in)
- Brightness: 300 nits (vs 250 nits)
- Battery capacity: 53 Wh (vs 47 Wh)
- Fingerprint reader
- Numeric keypad
Lenovo IdeaPad Slim 3i 14 Gen 10
- Portability score: 8.8/10 (vs 7.1/10)
- Display score: 2.6/10 (vs 2.4/10)
- Connectivity score: 6.2/10 (vs 6.1/10)
- Pixel density: 157 ppi (vs 141 ppi)
- Weight: 1.29 kg (vs 1.77 kg)
- Wi-Fi generation: 7 (vs 6)
- Bluetooth version: 5.4 (vs 5.3)
- SD card reader
- Dolby Atmos
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Frequently Asked Questions
Which is better, the Acer Aspire 15 A15-51 or the Lenovo IdeaPad Slim 3i 14 Gen 10?
Acer Aspire 15 A15-51 wins 8 of the 12 categories we compared, against 3 for Lenovo IdeaPad Slim 3i 14 Gen 10 (1 tied) — including overall score (4.4/10 vs 4.1/10).
Which is cheaper, the Acer Aspire 15 A15-51 or the Lenovo IdeaPad Slim 3i 14 Gen 10?
The Lenovo IdeaPad Slim 3i 14 Gen 10 costs around $619, $80 less than the Acer Aspire 15 A15-51 at around $699.
What are the main differences between the Acer Aspire 15 A15-51 and the Lenovo IdeaPad Slim 3i 14 Gen 10?
The biggest gaps are in overall score (4.4/10 on the Acer Aspire 15 A15-51 vs 4.1/10); performance score (5/10 on the Acer Aspire 15 A15-51 vs 3.2/10); portability score (8.8/10 on the Lenovo IdeaPad Slim 3i 14 Gen 10 vs 7.1/10).