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Lenovo IdeaPad Slim 3 15IRH8
Lenovo

Lenovo IdeaPad Slim 3 15IRH8

Expert rating6.7 / 10

View on psref.lenovo.com
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: 2026-10-10

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Lenovo IdeaPad Slim 3 15IRH8 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.

Our verdict

Reviewed by Burooj Alam. Rated by us, not by users.

Expert rating6.7 / 10

The IdeaPad Slim 3 15 has a Core i5-13420H, 8GB of LPDDR5 and a 15.6-inch 1920 x 1080 IPS display at 300 nits. It weighs 1.62 kg and suits students and light users who mainly browse, stream and handle office work.

The 8GB of RAM is fully soldered with a maximum of 8GB, so you cannot add memory later. Storage is a single 256GB SSD, and the 47 Wh battery is modest.

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

Specifications

What these specs mean

Identity and variant

BrandLenovo
SeriesIdeaPad Slim 3
Series IDideapad-slim3-15irh8
SKU NameCore i5-13420H / 8GB LPDDR5 soldered / 256GB
Chassis Code15IRH8
Region SoldGlobal

Class and platform

Laptop ClassBudget Mainstream
Release Year2023
Operating SystemWindows 11 Home
Weight1.62 kg

Processor

CPU BrandIntel
CPU ModelIntel Core i5-13420H
CPU Cores8

Sustained power

Sustained Power SourceNot Measured

Graphics

GPU BrandIntel
GPU ModelIntel UHD Graphics
VRAM0 GB
Graphics SwitchingIntegrated Only

Memory

RAM Capacity8 GB
RAM TypeLPDDR5
RAM Speed4800 MT/s
Memory Form FactorSoldered
Memory SolderedYes
Max RAM Supported8 GB

Upgradability

RAM Slots0
RAM Slots Free0
Storage Slots1
Storage Slots Free0
Storage Form FactorM.2 2242
Storage InterfacePCIe 4.0 x4
SATA Bay PresentNo

Storage as shipped

Storage Capacity256 GB
Storage TypeNVMe SSD

Display

Display Size15.6 inches
Resolution Width1920 px
Resolution Height1080 px
Panel TypeIPS
Brightness300 nits
Brightness ConditionVendor Unstated
TouchscreenNo
Colour Gamut45% NTSC

Battery and ports

Battery Capacity47 Wh
Thunderbolt SupportNone
WiFi StandardWiFi 6

FAQs

Can you upgrade the RAM in the Lenovo IdeaPad Slim 3 15IRH8?

No. The memory (8 GB of LPDDR5) is soldered to the motherboard and there are no memory slots, so it cannot be upgraded after purchase. Choose the capacity you need when you buy.

Can you upgrade the SSD in the Lenovo IdeaPad Slim 3 15IRH8?

Yes. It has 1 M.2 2242 slot (PCIe 4.0 x4). As shipped the slot is in use, so upgrading means replacing the existing drive. It ships with 256 GB NVMe SSD.

What display does the Lenovo IdeaPad Slim 3 15IRH8 have?

The Lenovo IdeaPad Slim 3 15IRH8 has a 15.6-inch, 1920x1080, IPS non-touch display covering 45% NTSC.

Does the Lenovo IdeaPad Slim 3 15IRH8 have Thunderbolt?

No. It does not list Thunderbolt or USB4 support.

How big is the battery in the Lenovo IdeaPad Slim 3 15IRH8?

The Lenovo IdeaPad Slim 3 15IRH8 has a 47 Wh battery.

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