Intel Core Ultra 7 255U vs Intel Core i7-12700

Intel Core Ultra 7 255U

The Intel Core Ultra 7 255U is an upper mid-range CPU with 12 cores from the Arrow Lake U series, which was introduced at the beginning of 2025. The chip is similar to the Meteor Lake U series, but the compute part is manufactured using the modern Intel 3 process and therefore offers higher clock rates.

Like its predecessor, the SoC is based on a tile/chiplet design. The smaller compute tile (compared to the H processors) offers 2 performance cores (P cores, Redwood Cove architecture, SMT) and 8 efficiency cores (E cores, Crestmont architecture). The P-cores support hyperthreading (therefore 14 threads together) and clock up to 5.2 GHz. The E-cores clock at a maximum of 4.2 GHz. In addition, there are now two more low-power efficiency cores with up to 2.4 GHz on the low-power island; the compute tile can therefore be completely deactivated when idle and during simple tasks in order to save power.

Performance

Due to the higher clock rates, the Core Ultra 7 255U can clearly distinguish itself from the old top model Core Ultra 7 165U (12 cores, max 4.9 / 3.8 GHz, 12 MB cache). The old Core Ultra 7 155U lags even further behind due to its low clock rates.

Graphics unit

The Core Ultra 7 155U offers a new Arc-based iGPU called Intel Graphics with 4 Xe cores and 64 EUs that reach a maximum of 2.1 GHz. However, the performance is far below the new Arc iGPU in the H series.

Features

Arrow Lake-U has integrated WiFi 6E (WiFi 7 optional). The integrated memory controller now supports LPDDR5/x-8400 or DDR5-6400 (max. 128 GB). A dedicated NPU (2x Gen3 Neural Compute Engines) is now used. The Xe Media Engine supports MPEG-2, AVC, VC-1 Decode, JPEG, VP8 Decode, VP9, HEVC and AV1 Decode up to 8K 10-bit HDR. The chip now supports PCIe-5.0 (x8 for GPU) and PCIe-4.0 (three x12 for SSDs).

Power consumption

The Intel Core Ultra 7 255U is specified with 15 watts TDP (base) and 57 watts (PL2) max. turbo power. Meteor Lake consists of five individual chips, whereby the processor part is manufactured in the new Intel 3 process (5nm). The graphics unit is produced at TSMC in N5 and the SoC and I/O tile in the older N6 process. These 4 chips are then applied to the 22nm base tile using the Foveros process.

Intel Core i7-12700

The Intel Core i7-12700F is a fast eight-core desktop processor based on the Alder Lake architecture, which was introduced in November 2021. The processor offers a base clock of 3.3 GHz and reaches up to 4.9 GHz in Turbo. In the same way, the Intel Core i7-12700K the Core i7-12700F is based on a hybrid architecture of 8P and 4E cores. The innovations of the Alder Lake-S processor compared to Rocket Lake, together with the smaller 10 nm manufacturing process, are clearly noticeable. The Intel Core i7-12700 does not offer a free multiplier, which means that overclocking is not possible.

Performance

Compared to the Intel Core i7-11700 , performance has been increased with a better IPC. The additional e-cores are also clearly noticeable in multi-threaded applications. Overall, this provides a noticeable performance boost, which also has an effect on all application areas. The 4 E-Cores provide the P-Cores with significantly more power. If all requirements are met, Intel Turbo Boost 3.0can increase the clock rate of the P-Cores to up to 4.9 GHz. The E-cores also offer a turbo and clock up to 3.6 GHz.

Graphics unit

The Intel Core i7-12700 is a processor with an integrated graphics unit. However, with the Intel UHD Graphics 770 there is only a simple iGPU which is only suitable for office use.

Power consumption

The TDP of the Intel Core i7-12700 is 65 watts, with the option to consume up to 180 watts in Turbo mode. If all restrictions are deactivated in the BIOS, the PL2 value can be achieved permanently. However, a high-quality and powerful cooling unit should be used for this.