Intel Celeron 6305 vs Intel Core i3-1125G4

Intel Celeron 6305

The Intel Celeron 6305 (or 6305U) is a power efficient dual-core SoC for laptops and Ultrabooks based on the Tiger Lake-U generation that was announced in the third quarter of 2020. It integrates only two Willow Cove processor cores (2 threads - no Hyper-Threading/SMT). The clock speed is set at 1.8 GHz as the chip does not support Turbo Boost.

Performance

The average 6305 in our database is in the same league as the Celeron N4505, as far as multi-thread benchmark scores are concerned. This is a very poor result, as of late 2022.

Your mileage may vary depending on how high the CPU power limits are.

Another novelty is the integrated Xe graphics фвфзеук based on the completely new Gen 12 architecture. It should offer a significantly higher performance compared to the older UHD Graphics G1 (Ice Lake). In the 6305U Intel calls it just UHD Graphics and it offers 48 EUs.

Other improvements from Ice Lake should be also integrated in Tiger Lake like the AI hardware acceleration and the partial integration of Thunderbolt and Wifi 6 in the chip.

The chip is produced on the improved 10nm+ process (called 10 nm SuperFin) at Intel that should be comparable to the 7nm process at TSMC (e.g. Ryzen 4000 series).

Intel Core i3-1125G4

The Intel Core i3-1125G4 is a 28 W quad-core SoC for laptops and Ultrabooks of the Tiger Lake family (UP3) that was introduced in September 2020. It integrates four Willow Cove processor cores (8 threads thanks to Hyper-Threading). Each core can clock from 2 GHz (guaranteed base speed @ 28 W) to 3.7 GHz (single-core boost). All cores at once can clock at up to 3.3 GHz. The faster Core i7 models offer more Level 3 cache (12 versus 8 MB in the i5) and higher clocked cores.

Another novelty is the integrated Xe GPU based on the completely new Gen 12 architecture. In the i3-1125G4 Intel names the GPU UHD Graphics and offers only 48 of the 96 EUs clocked at 400 - 1250 MHz. The GPU and CPU can together use the 8 MB of L3 cache.

Furthermore, Tiger Lake SoCs add PCIe 4 support (four lanes), AI hardware acceleration, and the partial integration of Thunderbolt 4 / USB 4 and Wi-Fi 6 in the chip.

Performance

While we have not tested a single laptop built around the 1125G4 as of October 2023, we expect the chip's multi-thread performance to be 10% to 20% lower than that of the Core i5-1135G7 (4 cores, 8 threads, somewhat higher clock speeds).

Your mileage may vary depending on how high the CPU power limits are and how competent the cooling solution of your system is.

Power consumption

This Core i3 series chip has a default TDP of 12 W to 28 W, the expectation being that laptop makers will go for a higher value in exchange for higher performance. Either way, that's a little too high to allow for passively cooled designs.

The i3-1125G4 is manufactured on Intel's third-gen 10 nm process marketed as SuperFin for average, as of early 2023, energy efficiency.