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Grey 15.6 inch Lenovo IdeaPad Slim 3i laptop closed lid smooth finish

Lenovo

Lenovo IdeaPad Slim 3i 15.6" FHD i5-1335U 12GB DDR5 1TB NVMe Windows 11 Pro Grey DVD Office Lifetime

SKU CH-H5C9-0H1XD

15.6" FHD laptop with i5-1335U up to 4.6GHz, 12GB DDR5, 1TB NVMe, Windows 11 Pro and lifetime Office

  • ColorGray
  • Operating SystemWindows 11 Pro
  • Screen Size15.0"
  • TouchscreenNon-Touch Screen
  • Display TypeFHD
  • Resolution1920 x 1080
  • Sharp 15.6" Full HD display at 1920 x 1080 resolution
  • Responsive 13th Gen Intel Core i5-1335U up to 4.6GHz
  • Smooth multitasking with 12GB DDR5 memory
  • Fast 1TB NVMe solid-state storage
  • Windows 11 Pro plus lifetime Microsoft Office licence

Lenovo IdeaPad Slim 3i 15.6" FHD

The Lenovo IdeaPad Slim 3i is a 15.6 inch Full HD laptop built for students and office workers who need a reliable Windows 11 Pro machine. It ships with a 13th Gen Intel Core i5-1335U processor, 12GB of DDR5 memory and a 1TB NVMe SSD. A lifetime Microsoft Office licence is included, making it ready for document work straight away. The non-touch display runs at 60 Hz and the chassis comes in grey with an internal DVD drive.

Thermals noise and power in daily use

Lenovo describes intelligent thermals that keep the system cool and whisper-quiet during typical workloads such as web browsing, video calls and document editing. The 15.0 inch form factor provides space for airflow without requiring aggressive fan curves. Integrated graphics and the efficient 1335U processor help maintain low power draw when the screen is at 1080p resolution. No backlit keyboard means one less component drawing battery in normal indoor lighting.

Behaviour under sustained load

Under prolonged multi-core tasks the i5-1335U can reach 4.6 GHz turbo frequencies, but the slim chassis limits how long peak speeds are held before thermal throttling reduces clocks. The 12GB DDR5 configuration is soldered and cannot be expanded, so memory-heavy workloads may hit capacity limits. The single HDMI output supports one external monitor at 60 Hz. Buyers who need more storage, a second drive bay or user-upgradable RAM should consider other form factors.

Highlights

  • Sharp 15.6" Full HD display at 1920 x 1080 resolution
  • Responsive 13th Gen Intel Core i5-1335U up to 4.6GHz
  • Smooth multitasking with 12GB DDR5 memory
  • Fast 1TB NVMe solid-state storage
  • Windows 11 Pro plus lifetime Microsoft Office licence

Specifications

BrandLenovo
SeriesIdeaPad Slim 3i
ColorGray
Operating SystemWindows 11 Pro
Screen Size15.0"
TouchscreenNon-Touch Screen
Display TypeFHD
Resolution1920 x 1080
Refresh Rate60 Hz
SSD1 TB
Memory12GB DDR5
HDMI1 x HDMI
AudioIntegrated Sound card
SpeakerInternal Speakers
TouchpadYes
KeyboardStandard
Backlit KeyboardNon-backlit
WebcamYes
Card Reader3-in-1
StyleStandard
TypeHome / Personal
UsageBusiness
Battery3-cell Lithium Ion
Battery LifeUp to 10 Hours
Weight3 - 3.9 lbs.
Software IncludedLifetime Microsoft Office

Questions about this item

How is the 12GB DDR5 memory installed and what step do people get wrong?

The 12GB DDR5 memory is soldered to the mainboard and cannot be upgraded or replaced by the user. The common mistake is trying to open the laptop to add a module, which risks damage and voids the factory seal.

What maintenance or replacement will the 1TB NVMe SSD need later?

The 1TB NVMe SSD has no moving parts and requires no scheduled maintenance. If capacity runs low, the drive can be replaced with a larger NVMe module, but this involves removing the bottom cover and reinstalling Windows 11 Pro.

What limit shows up first on the i5-1335U during sustained loads?

The i5-1335U will hit its thermal ceiling before reaching the 4.6 GHz maximum turbo. The cooling system throttles clocks to keep temperatures safe, so sustained performance settles below the peak frequency.

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