Intel Core i5-1235U

The Core i5-1235U is a low-power 12th Gen laptop chip, soldered to the motherboard, so you pick it by picking the laptop. It mixes two core types: 2 performance cores and 8 efficient cores, 12 threads in total. The performance cores boost to 4.4 GHz and the efficient cores to 3.3 GHz, with 12 MB of shared cache. It runs at a 15 W base power with up to 55 W in short bursts, is built on Intel 7, and supports up to 64 GB of DDR5-4800, DDR4-3200, LPDDR5-5200 or LPDDR4x-4267 memory in two channels, plus Thunderbolt 4 and PCIe Gen 4.

For browsing, office apps, video calls and streaming, the i5-1235U still feels responsive, and the efficient cores keep background tasks off the performance cores. With only 2 performance cores, long exports, big spreadsheets and code compiles take noticeably longer than on H-series or P-series chips. Laptop makers set their own power limits and cooling, so thin models often run it slower under long loads than thicker ones.

The integrated graphics have 80 execution units running at up to 1.2 GHz. Intel only allows the Iris Xe name when the laptop has dual-channel memory; with a single memory stick the same graphics are labeled Intel UHD and run noticeably slower. The graphics handle 4K video, up to four displays and light photo editing, and older or lighter games run at low settings. There is no NPU for AI features.

The 13th Gen Core i5-1334U and i5-1335U that replaced it keep the same 2P + 8E layout with a slightly higher 4.6 GHz boost and support for faster memory, so the gap is small. The 2024 Core 5 120U pushes the same design to a 5.0 GHz boost. AMD's Ryzen 5 5625U and Ryzen 5 7530U, its direct rivals in the same price range, offer 6 full Zen 3 cores and 12 threads. The comparison pages below show each spec side by side.

Yes, if the laptop is cheap, has 16 GB of dual-channel memory and a good screen, since it still handles everyday work well. At a similar price, a laptop with a 13th Gen chip or a Core 5 120U gives you slightly newer silicon and faster memory support. If you want AI features or better integrated graphics, look at newer Core Ultra or Ryzen laptops instead.