Lenovo IdeaPad Slim 3 i5-12450H Review: Is the 16GB/512GB Model Right for You?

The Lenovo IdeaPad Slim 3 83ER008DIN pairs a Core i5-12450H with 16GB RAM, a 512GB SSD and a 15.6-inch IPS screen. Here is who it suits, its limits and what to check before buying.

By Gadget Soch·17 Oct 2026·Updated 19 Oct 2026·10 min read

The Lenovo IdeaPad Slim 3 with the Intel Core i5-12450H (model 83ER008DIN) is a 15.6-inch everyday laptop that pairs a 45W H-series processor with 16GB of LPDDR5 RAM, a 512GB PCIe 4.0 SSD and a Full HD IPS screen. It is a sensible pick for students and office users who want a large screen, a number pad and more processor headroom than typical thin laptops, but not for gaming or creative work, because it relies on Intel UHD graphics and a basic 45% NTSC display.

The variant behind our Amazon.in link, as listed on 17 October 2026, comes in grey with Windows 11, Microsoft Office 2021, a backlit keyboard and a free one-year Accidental Damage Protection (ADP) offer mentioned in the listing title. Its memory is soldered to the motherboard, so 16GB is what you will use for the life of the laptop.

Note: this article is based on Lenovo’s official PSREF specifications, Intel’s processor data and published spec listings and review summaries, checked on 17 October 2026. It is not a hands-on review, and no figures below come from our own testing.

Quick verdict

Best for: students, home users and office workers who want a 15.6-inch screen with a number pad and a capable CPU for multitasking, spreadsheets and coding
Skip if: you want to play recent games, edit colour-critical photos or video, or need a very light laptop to carry all day
Key strengths: 8-core, 12-thread Core i5-12450H, 16GB dual-channel LPDDR5-4800, PCIe 4.0 SSD slot, 300-nit IPS panel, backlit keyboard with numeric keypad, webcam privacy shutter, Office 2021 bundled as per the listing
Key limitations: RAM cannot be upgraded, basic Intel UHD graphics, 45% NTSC colour coverage, HDMI 1.4 limited to 4K at 30Hz, a fairly small 47Wh battery and an all-plastic body

Lenovo IdeaPad Slim 3 (83ER008DIN) key specifications

Lenovo IdeaPad Slim 3 key specs at a glance — Lenovo IdeaPad Slim 3 key specifications, summarised from the table in this review.

Specification	Details
Processor	Intel Core i5-12450H, 8 cores (4P + 4E), 12 threads, up to 4.4GHz, 12MB cache
Processor base power	45W (maximum turbo power 95W, per Intel)
Graphics	Intel UHD Graphics (integrated, shared memory)
Memory	16GB LPDDR5-4800, soldered, dual-channel, not upgradeable
Storage	512GB SSD in one M.2 2242 PCIe 4.0 x4 slot (supports up to 1TB)
Display	15.6-inch Full HD (1920 x 1080) IPS, 300 nits, 800:1 contrast, 45% NTSC, anti-glare
Keyboard	Backlit (as per listing), 6-row with numeric keypad
Webcam	720p or 1080p depending on configuration, with privacy shutter
Audio	2 x 1.5W stereo speakers with Dolby Audio, dual microphones
Battery	47Wh with Rapid Charge Boost
Charger	65W round-tip AC adapter
Ports	2 x USB-A 5Gbps, 1 x USB-C 5Gbps (data, Power Delivery, DisplayPort 1.2), HDMI 1.4, SD card reader, 3.5mm combo jack
Wireless	Wi-Fi 5 with Bluetooth 5.1 or Wi-Fi 6 with Bluetooth 5.2 (depends on configuration)
Build	PC-ABS plastic top and bottom, MIL-STD-810H (21 test items, per Lenovo)
Dimensions	359.3 x 235 x 17.9 mm
Weight	From 1.62kg (listing title says 1.6kg)
Software	Windows 11 and MS Office 2021 (as per the Amazon listing)

Specs are from Lenovo PSREF and Intel, with variant details from the Amazon.in listing title. Check the current price of the Lenovo IdeaPad Slim 3 i5-12450H on Amazon.in.

Design and build: practical rather than premium

The IdeaPad Slim 3 15IAH8 uses a PC-ABS plastic shell for both the lid and the base, according to Lenovo’s PSREF sheet. At 17.9mm thick and 1.62kg, it is reasonably portable for a 15.6-inch machine. Lenovo says it passed 21 MIL-STD-810H test items, a manufacturer test of selected procedures rather than a promise it will survive drops or spills, which is where the listed ADP offer may help.

The keyboard is a 6-row layout with a dedicated numeric keypad, handy for Excel or accounting software, and the Amazon title confirms this variant is backlit. The webcam has a physical privacy shutter and TPM 2.0 is built in for Windows 11 security features. A fingerprint reader is optional on the 15IAH8 series, and third-party listings show 83ER008DIN without one.

Display: a proper IPS panel, but not for colour work

Lenovo sells the 15IAH8 with either a TN or an IPS panel, and this variant uses the better IPS option, as stated in the Amazon title. Per PSREF, the IPS panel is Full HD, rated at 300 nits with 800:1 contrast, an anti-glare finish and 85-degree viewing angles in every direction. IPS keeps text and colours consistent at an angle, something budget TN panels handle poorly.

The weak point is colour coverage. A 45% NTSC gamut is basic, so photos look less vivid than on 100% sRGB screens, and it is a poor choice for photo or design work. Notebookcheck lists a 60Hz refresh rate, normal for office laptops. 300 nits suits indoor use but may feel dim near a bright window.

Performance: what the Core i5-12450H brings

The Intel Core i5-12450H is a 12th-generation H-series chip with 4 performance cores and 4 efficient cores (12 threads in total), boosting to 4.4GHz on the performance cores. Intel rates its base power at 45W and maximum turbo power at 95W. That is a higher power class than the 15W U-series chips in many thin laptops, giving more room for sustained multi-core work such as compiling code or running many browser tabs alongside Office. How much headroom you actually get depends on Lenovo’s cooling in this slim chassis, and we found no independent lab test of this exact model to quote.

Graphics are the limiting factor. The i5-12450H uses Intel UHD Graphics rather than Intel Iris Xe, and Notebookcheck’s page for this laptop describes the integrated GPU as suitable for casual gaming at low settings. Office, streaming and light older games are fine, but recent AAA titles are not. On the plus side, the 16GB runs in dual-channel mode (Lenovo notes 8GB versions are single-channel), which helps because the integrated GPU shares memory bandwidth.

Memory and storage: plan ahead

The RAM is soldered with no expansion slot, so this variant’s 16GB cannot be increased later. For office, coding and student work, 16GB is comfortable for several years.

Storage is more flexible. There is a single M.2 slot that, per Lenovo, accepts PCIe 4.0 x4 NVMe drives up to 1TB. It is the shorter M.2 2242 size, not the common 2280, so buy a 2242 drive if you upgrade. With no second slot, an external drive is the simpler route to more space. A portable SSD such as the SanDisk Extreme Portable SSD works, though the 5Gbps USB ports cap its transfer speed.

Battery and charging

Lenovo fits a 47Wh battery and rates it at up to 7.6 hours in the MobileMark 2018 test at 200 nits, and up to 12 hours of local 1080p video playback at 150 nits. These are lab figures, and real-world runtime with Wi-Fi on and a 45W processor working hard will usually be lower. For an H-series laptop, 47Wh is on the small side, so carry the charger for a full day out.

The laptop ships with a 65W round-tip charger. Lenovo’s Rapid Charge Boost is rated to give about 2 hours of use from a 15-minute charge. The USB-C port lists Power Delivery, but Lenovo does not state a USB-C charging wattage for this model, so treat the round-tip adapter as the main charger.

Ports and connectivity

You get two USB-A ports and one USB-C port, all at 5Gbps, plus HDMI 1.4, a full-size SD card reader and a 3.5mm headphone and microphone combo jack. The USB-C port carries DisplayPort 1.2, which Lenovo says can drive up to 4K at 60Hz, while HDMI 1.4 tops out at 4K at 30Hz. For a 4K monitor, use USB-C. There is no Ethernet port.

Wireless depends on configuration: Lenovo offers the 15IAH8 with either Wi-Fi 5 and Bluetooth 5.1 or Wi-Fi 6 and Bluetooth 5.2. Third-party listings for 83ER008DIN mention Wi-Fi 6, but the Amazon title does not state it, so check the listing if it matters.

Should you buy it?

Who should buy the Lenovo IdeaPad Slim 3 — Who the Lenovo IdeaPad Slim 3 suits, summarised from this review.

A good fit if you

mainly run Office, browsers, video calls and coding tools
want a 15.6-inch screen and a numeric keypad
value a backlit keyboard, privacy shutter and bundled Office 2021 (as per the listing)
want H-series CPU headroom without paying for a graphics card

Better to skip if you

want to play recent games or use GPU-heavy editing software
need a colour-accurate screen for photography or design
carry your laptop everywhere and want a lighter body with longer battery life
want the option to add more RAM later

Alternatives worth comparing

Lenovo IdeaPad Slim 3 Ryzen 5 7520U (15AMN8): the same 15.6-inch family with a 47Wh battery and the same 1.62kg starting weight, but with AMD’s 4-core, 8-thread Ryzen 5 7520U and Radeon 610M graphics. Lenovo rates it higher for battery (11 hours in MobileMark 2018), while the i5-12450H has twice the cores. See our IdeaPad Slim 3 Ryzen 5 7520U review.

Lenovo IdeaPad Slim 5 14IAH8: the same Core i5-12450H in a 14-inch body with a 16:10 1920 x 1200 display, an aluminium top cover, a larger 56.6Wh battery and USB-C charging, starting at 1.46kg. Choose it if portability matters more than screen size.

Lenovo LOQ 15IAX9 (Core i5-12450HX, RTX 3050): for gaming, this adds an RTX 3050 6GB GPU rated at 95W and a 144Hz panel, but it starts at 2.38kg.

What to check before you order

Lenovo IdeaPad Slim 3 buying checklist — What to check before you buy the Lenovo IdeaPad Slim 3.

Confirm the model number 83ER008DIN and the configuration (i5-12450H, 16GB, 512GB, IPS) in the listing’s technical details, as Amazon pages can switch variants
Check the listing still mentions MS Office 2021 and the 1-year ADP, and how the ADP is activated
Lenovo’s standard warranty for this series is 1 year, so check warranty status on Lenovo India’s support site with the serial number
Make sure the 65W round-tip charger is in the box
If you need a fingerprint reader or Wi-Fi 6, verify it on the listing, as both vary by configuration
Keep the GST invoice for warranty or ADP claims

Once you have confirmed the details, see the IdeaPad Slim 3 83ER008DIN (16GB/512GB) on Amazon.in.

Frequently asked questions

Is the Lenovo IdeaPad Slim 3 i5-12450H good for students?

Yes, for most students. The Core i5-12450H, 16GB RAM and 512GB SSD suit Office, online classes and programming. The compromises are a 47Wh battery and integrated graphics, so it is not ideal for gaming or design courses.

Can I upgrade the RAM on the 83ER008DIN?

No. Lenovo’s PSREF lists the memory as soldered LPDDR5-4800 with no slots. The SSD can be replaced with an M.2 2242 NVMe drive of up to 1TB.

Can the IdeaPad Slim 3 i5-12450H run games?

Only light ones. It uses Intel UHD integrated graphics, which Notebookcheck describes as suited to casual gaming at low settings.

Can I connect a 4K monitor?

Yes, but use the USB-C port. Lenovo rates the USB-C output (DisplayPort 1.2) at up to 4K 60Hz, while the HDMI 1.4 port is limited to 4K 30Hz.

How long does the battery last?

Lenovo rates the 47Wh battery at up to 7.6 hours in MobileMark 2018 and up to 12 hours of local video playback at low brightness. Mixed daily use will usually be shorter.

Does this variant include Microsoft Office?

The Amazon.in listing title observed on 17 October 2026 mentions MS Office 2021. Bundles can change, so confirm it on the product page before ordering.

Final word

The Lenovo IdeaPad Slim 3 83ER008DIN suits buyers who want a big-screen, number-pad laptop with an H-series Core i5 and 16GB RAM, and do not need strong graphics or an accurate screen. Soldered RAM, a plastic body and a modest battery are the trade-offs. If that balance suits you, check the latest price and offers for the Lenovo IdeaPad Slim 3 on Amazon.in.

Sources

All sources were checked on 17 October 2026.