Lenovo IdeaPad Slim 3 15IRH8
- CPU:
- Core i5-13420H
- RAM:
- 8GB LPDDR5 soldered
- Storage:
- 256GB NVMe (0 slots free)
- Display:
- 15.6" FHD IPS
- Class:
- Budget Mainstream
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Manufacturer: Lenovo Last updated: 2026-09-21
Lenovo IdeaPad Slim 3 15IRH8 (Core i5-13420H, 8GB soldered) Review
Lenovo IdeaPad Slim 3 15IRH8 budget laptop, Intel Core i5-13420H, 8GB LPDDR5 soldered memory, 256GB M.2 2242 NVMe SSD, 15.6 inch FHD IPS display, Wi-Fi 6, not upgradeable.
A budget mainstream IdeaPad where the memory decision is already made for you: 8GB of LPDDR5 soldered directly to the board, with a single small-form-factor SSD slot that ships full.
Performance
Intel Core i5-13420H (8 cores, up to 4.6GHz) with integrated Intel UHD Graphics — no discrete GPU. This tier of the chassis is aimed at browsing, office work and light multitasking rather than creative or gaming workloads.
Upgradability
This is a fully soldered-memory configuration: 8GB of LPDDR5 is fixed to the board with zero RAM slots, so 8GB is this machine's ceiling for its lifetime. Storage is a single M.2 2242 PCIe 4.0x4 slot already filled by the 256GB drive — replacing it means removing the original, not adding to it.
Battery life
47Wh battery. Lenovo does not publish a light-load runtime figure for this configuration on the source spec sheet.
Display
15.6-inch 1920x1080 IPS panel at 300 nits (a lower-cost 250-nit TN option also exists in this chassis; this record covers the IPS variant). Refresh rate is not stated by Lenovo.
Design and ports
1.62kg starting weight. Wi-Fi options span 802.11ac (Wi-Fi 5) to 802.11ax (Wi-Fi 6) depending on the wireless card fitted; this record uses the Wi-Fi 6 option.
Specifications
Identity and variant
| Brand | Lenovo |
|---|---|
| Series | IdeaPad Slim 3 |
| Series ID | ideapad-slim3-15irh8 |
| SKU Name | Core i5-13420H / 8GB LPDDR5 soldered / 256GB |
| Chassis Code | 15IRH8 |
| Region Sold | Global |
Class and platform
| Laptop Class | Budget Mainstream |
|---|---|
| Release Year | 2025 |
| Operating System | Windows 11 Home |
| Weight | 1.62 kg |
Processor
| CPU Brand | Intel |
|---|---|
| CPU Model | Intel Core i5-13420H |
| CPU Cores | 8 |
Sustained power
| Sustained Power Source | Not Measured |
|---|
Graphics
| GPU Brand | Intel |
|---|---|
| GPU Model | Intel UHD Graphics |
| VRAM | 0 GB |
| Graphics Switching | Integrated Only |
Memory
| RAM Capacity | 8 GB |
|---|---|
| RAM Type | LPDDR5 |
| RAM Speed | 4800 MT/s |
| Memory Form Factor | Soldered |
| Memory Soldered | Yes |
| Max RAM Supported | 8 GB |
Upgradability
| RAM Slots | 0 |
|---|---|
| RAM Slots Free | 0 |
| Storage Slots | 1 |
| Storage Slots Free | 0 |
| Storage Form Factor | M.2 2242 |
| Storage Interface | PCIe 4.0 x4 |
| SATA Bay Present | No |
Storage as shipped
| Storage Capacity | 256 GB |
|---|---|
| Storage Type | NVMe SSD |
Display
| Display Size | 15.6 inches |
|---|---|
| Resolution Width | 1920 px |
| Resolution Height | 1080 px |
| Panel Type | IPS |
| Brightness | 300 nits |
| Brightness Condition | Vendor Unstated |
| Touchscreen | No |
Battery and ports
| Battery Capacity | 47 Wh |
|---|---|
| Thunderbolt Support | None |
| WiFi Standard | WiFi 6 |
Provenance
| Source URL | https://psref.lenovo.com/syspool/Sys/PDF/IdeaPad/IdeaPad_Slim_3_15IRH8/IdeaPad_Slim_3_15IRH8_Spec.PDF |
|---|
Expert Review
Reviewed by Burooj Alam. Rated by us, not by users.
Best for
- Students and light users who mainly browse, stream and do office work
- Buyers who want a name-brand 15.6-inch laptop at a low price
- Anyone who won't need more than 8GB of RAM for the machine's life
Not for
- Anyone hoping to add RAM later — this configuration is fully soldered
- Multitaskers who regularly run many browser tabs plus other apps
- Buyers wanting to swap in a second, larger SSD alongside the original