i5-1335U vs i5-13420H
i5-1335U vs i5-13420H
I purchased a Lenovo V15 G4 IRU laptop equipped with 16 GB of RAM and a 512 GB SSD. It was supposed to include an i5-1335U processor, but it came with an i5-13420H instead. I’m curious about the distinctions between these two CPUs.
Some points to consider:
They were released around the same time (Q1’23) and had similar pricing (around 340 dollars each). It seems unlikely they were positioned to compete directly, otherwise marketing both wouldn’t make sense.
GPU: Reports suggest the i5-1335U’s Iris Xe (80 EU) performs better than the i5-13420H’s Intel UHD 13th (48 EU). However, on 3DMark results appear to favor the 13420H, which makes me confused. (https://www.notebookcheck.net/i5-13420H-...596.0.html)
PassMark overall CPU scores show the 13420H slightly outperforms in multi-core tests and is nearly equal in single-core performance. This raises the question—why would someone choose the 1335U at the same price?
PCIe: The 1335U uses PCIe version 4.0 with 20 lanes, whereas the 13420H uses PCIe version 5.0 with 28 lanes. Could this difference affect performance?
Power consumption: Both chips have significantly different TDPs—15 watts for the 1335U and 45 watts for the 13420H. Given similar manufacturing processes (around 10 nm) and age, efficiency should be comparable. Lower power settings might not drastically change performance, so battery life shouldn’t differ much. Am I misunderstanding?
U is simple, slow, and not very powerful.
H is full-featured but uses more battery. You can adjust it to remove extra features when you don’t need them.
PCIe 5 makes most internal parts run faster and more efficiently than PCIe 4, which explains the extra speed in some tests.
I’d choose H every time—it’s a good deal compared to U at the same cost.
U tends to be more affordable, but it doesn't usually compete directly with H. The cost difference or performance gap is too significant. If the CPU performs better, it also boosts the GPU's speed (similar with RAM). Considering the PCIe 5 specifications offer higher bandwidth, it's clear the H would match or exceed the Iris in the U CPU in speed.