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Silver 15.6 inch ThinkPad E15 Gen 4 laptop closed on a plain background

Lenovo

Lenovo ThinkPad E15 Gen 4 laptop i7-1255U 40GB 1TB Silver

SKU CH-RJXH-X0XHG

Business laptop with a 15.6-inch anti-glare FHD display, 12th Gen Intel Core i7-1255U processor, 40GB DDR4 RAM and 1TB PCIe SSD running Windows 11 Pro

  • ColorSilver
  • Operating SystemWindows 11 Pro
  • CPU TypeIntel Core i7 12th Gen
  • Processor NameIntel Core i7-1255U
  • Screen Size15.6"
  • TouchscreenNon-Touch Screen
  • 40GB DDR4 RAM keeps many apps responsive at once
  • 1TB PCIe SSD built from two 512GB drives for fast boot and file access
  • 12th Gen Intel Core i7-1255U with 10 cores and 12 threads handles heavy workloads
  • 6" FHD IPS anti-glare screen at 300 nits gives clear outdoor viewing
  • Thunderbolt 4 port plus HDMI 2.0 and USB-A 3.2 Gen 1 connect docks and displays

Business laptop with 40GB DDR4

The ThinkPad E15 Gen 4 pairs a 12th Gen Intel Core i7-1255U with 40GB of DDR4 memory and a 1TB PCIe SSD built from two 512GB modules. It runs Windows 11 Pro on a 15.6 inch FHD IPS panel rated at 300 nits with an anti-glare finish. A backlit keyboard and fingerprint reader are included for daily office work.

Sustained load behaviour

The 10-core, 12-thread processor operates at a 1.7GHz base and can reach 4.7GHz max turbo, while Intel Iris Xe graphics share system memory. Under continuous multi-threaded workloads the U-series chip will throttle to stay within its thermal envelope, so expect lower clocks than short bursts. The dual SSD layout helps keep storage throughput steady during long file transfers.

Deciding specification

The single figure that determines fit is the 40GB DDR4 capacity; it cannot be expanded beyond the factory configuration. Buyers who need more memory or discrete graphics for heavy rendering should look elsewhere.

Connectivity and ports

One Thunderbolt 4 port, one USB-A 3.2 Gen 1, one USB 2.0, HDMI 2.0, RJ-45 and a headset jack provide the physical interfaces. Wireless-AX and Bluetooth handle wireless links. The 720p webcam with dual-array microphone covers basic video calls.

Highlights

  • 40GB DDR4 RAM keeps many apps responsive at once
  • 1TB PCIe SSD built from two 512GB drives for fast boot and file access
  • 12th Gen Intel Core i7-1255U with 10 cores and 12 threads handles heavy workloads
  • 6" FHD IPS anti-glare screen at 300 nits gives clear outdoor viewing
  • Thunderbolt 4 port plus HDMI 2.0 and USB-A 3.2 Gen 1 connect docks and displays

Specifications

SeriesThinkPad
ColorSilver
Operating SystemWindows 11 Pro
CPU TypeIntel Core i7 12th Gen
Processor NameIntel Core i7-1255U
Screen Size15.6"
TouchscreenNon-Touch Screen
Display TypeFHD
Resolution1920 x 1080
GPU/VPUIntel Iris Xe Graphics
SSD1TB PCIe
HDDNo
Memory40GB
TypeWork / Business

Questions about this item

How loud or hot does the i7-1255U get when the 40GB DDR4 workload runs all day?

The 12th Gen Intel Core i7-1255U has a 15 W base power and can boost to 4.7 GHz, so sustained multi-threaded loads will spin the fans audibly and warm the chassis, but the 15.6" chassis provides enough airflow for typical business use.

Which cables or peripherals must I already own to use the Thunderbolt 4 40Gbps port and the HDMI 2.0 output?

You need a Thunderbolt 4 or USB-C 3.2 Gen 2 cable for the 40 Gbps port and a standard HDMI 2.0 cable for the video output; the box includes only the laptop and its power adapter.

Will my older USB 2.0 flash drives and RJ-45 network cable work with the single USB 2.0 Type-A and the RJ-45 jack on this unit?

Yes, the lone USB 2.0 Type-A port and the RJ-45 Ethernet jack are backward compatible, so legacy flash drives and wired networks connect without adapters.

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