Intel Core i3-13100F vs Intel Core i7-1255U Comparison

Intel Core i7-1255U and Intel Core i3-13100F sit at nearly identical average benchmark scores, with the i7-1255U at 17656 and the i3-13100F at 17653, a delta of 0%. Both hold the 71st percentile among all CPUs. Yet the data shows two completely different performance profiles: the mobile i7-1255U wins 5 of 17 head-to-head tests, while the desktop i3-13100F wins 12. The i3-13100F dominates in sustained multi-core workloads and newer single-thread tests, but the i7-1255U counters with decisive victories in encryption and integer math. The choice is not about overall speed — it is about matching the workload to the right architecture.

Head-to-Head Benchmarks

The largest single victory belongs to the i7-1255U in Cinebench R15 single-core, where it scores 237.5 against the i3-13100F’s 177, a 34.2% advantage. That is a massive gap for a single-threaded test and reflects the i7-1255U’s higher boost clock of 4.70 GHz versus 4.50 GHz on the i3-13100F. The i7-1255U also wins Cinebench R15 multi-core, posting 1387 versus 1255, a 10.5% edge. In PassMark integer math, the i7-1255U scores 48498 against 43038, a 12.7% win, and it leads in random string sorting by a narrow 2.2% (16934 vs 16569). Data encryption goes to the i7-1255U at 9262 versus 8496, a 9% advantage.

The i3-13100F answers with the biggest multi-core win in Cinebench R23, scoring 12458 versus 8285, a 33.5% lead. That is the single largest delta in either direction across the entire benchmark set. In Cinebench R20 multi-core, the i3-13100F scores 5232 against 4635, an 11.4% margin. The desktop chip also wins Cinebench R23 single-core, 1758 versus 1647, a 6.3% edge, and Cinebench R20 single-core by the same 11.4% pattern (738 vs 654). PassMark extended instructions show a 27.8% win for the i3-13100F (11407 vs 8231), and find prime numbers goes to the i3-13100F at 61 versus 40, a 34.4% gap. PassMark physics favors the i3-13100F by 25.2% (1055 vs 789), and PassMark multi-thread shows a 9.9% lead (14687 vs 13234). Floating point math is close, with the i3-13100F ahead only 2.7% (33510 vs 32618). PassMark single-thread and singlethread both go to the i3-13100F at 3609 versus 3192, an 11.6% margin. Data compression also favors the i3-13100F: 168043 versus 147320, a 12.3% win.

The scoreboard is lopsided, but the nature of the wins matters more than the count. The i7-1255U wins where bursts of speed or specific instruction patterns matter, while the i3-13100F wins where sustained throughput dominates.

Where Each One Wins

The i7-1255U is the pick for older single-threaded workloads and encryption-heavy tasks. Its 34.2% lead in Cinebench R15 single-core shows that legacy applications that rely on a single core will see a clear benefit. The 9% win in data encryption suggests that cryptographic operations — often latency-sensitive and dependent on core count plus clock speed — run faster on the mobile chip. Integer math is another strong suit, with a 12.7% advantage, which points to general-purpose arithmetic and database-style integer operations. Random string sorting, a proxy for text processing and sorting algorithms, goes to the i7-1255U by 2.2%, indicating a slight edge in memory-touching workloads.

The i3-13100F wins almost everywhere else. The 33.5% lead in Cinebench R23 multi-core is the headline: rendering, video encoding, and any workload that scales across all cores will favor the desktop chip. Physics simulation is 25.2% faster, which matters for games and scientific computing. Extended instruction sets (AVX, SSE) run 27.8% faster, so vectorized code — common in media processing and scientific libraries — will see a large uplift. Prime number finding is 34.4% faster, indicating superior raw integer throughput in tight loops. The i3-13100F also leads in modern single-threaded tests (Cinebench R23 and R20 single-core), which suggests that newer software that uses current instruction sets will run better on the desktop part. Data compression is 12.3% faster, a win for archiving and file transfers.

Architecture Differences

The i7-1255U uses Alder Lake-U architecture on a 10 nm process, while the i3-13100F uses Raptor Lake-S, also on 10 nm, but with a different design philosophy. The i7-1255U is a 10-core, 12-thread hybrid design with a base clock of 1700 MHz and boost of 4.70 GHz. The i3-13100F is a 4-core, 8-thread chip with a higher base clock of 3.40 GHz and a boost of 4.50 GHz. Both share the same L1 cache (80 KB per core) and L2 cache (1.25 MB per core), and both have 12 MB of shared L3 cache. The process node is identical, but the die size differs: the i3-13100F measures 163 mm², while the i7-1255U’s die size is not listed. The i3-13100F belongs to the Raptor Lake generation, while the i7-1255U is from the Alder Lake generation — a one-generation gap that explains the newer single-thread performance of the desktop chip despite its lower boost clock. The i3-13100F supports PCIe Gen 5 with 20 lanes, while the i7-1255U is limited to PCIe Gen 4 with 20 lanes — a significant difference for storage and GPU bandwidth. Both use the same Intel foundry and 10 nm process, but the i3-13100F’s larger die suggests higher power delivery capability, reflected in its 58W TDP versus 15W on the i7-1255U.

Specification Differences

The two CPUs differ in nearly every headline specification. The i7-1255U has 10 cores and 12 threads versus 4 cores and 8 threads on the i3-13100F. Base clocks are 1700 MHz versus 3400 MHz — the i3-13100F runs more than twice as fast at idle. Boost clocks are closer, with 4.70 GHz on the i7-1255U versus 4.50 GHz on the i3-13100F. TDP is a massive split: 15W on the mobile part versus 58W on the desktop part. Sockets differ: Intel BGA 1744 for the i7-1255U, Intel Socket 1700 for the i3-13100F. The i7-1255U includes integrated Iris Xe graphics with 96 execution units, while the i3-13100F has no integrated graphics at all, requiring a discrete GPU. The i3-13100F has a launch MSRP of $109; the i7-1255U has no listed launch MSRP. Memory support is identical (DDR4 and DDR5, dual-channel), and neither supports ECC memory. The i3-13100F has a larger die (163 mm²) and a newer release date (2023-01-03) versus the i7-1255U’s release on 2022-02-22. Both are locked (multiplier not unlocked), and both are currently active in production. The i3-13100F is part of the Core 13th Gen series; the i7-1255U has no series listed.

FAQ

Q: Which CPU has more cores?

A: The Intel Core i7-1255U has 10 cores and 12 threads, compared to the Intel Core i3-13100F’s 4 cores and 8 threads.

Q: Why does the i3-13100F win Cinebench R23 multi-core by so much?

A: The i3-13100F scores 12458 versus 8285, a 33.5% lead. Despite fewer cores, its higher base clock (3.40 GHz vs 1.70 GHz) and desktop power envelope (58W vs 15W) allow sustained multi-core performance that the mobile chip cannot match.

Q: Does the i7-1255U have integrated graphics?

A: Yes, the i7-1255U includes Iris Xe graphics with 96 execution units. The i3-13100F has no integrated graphics, so it requires a separate GPU.

Q: Which CPU is faster in single-threaded tests?

A: It depends on the test. The i7-1255U wins Cinebench R15 single-core by 34.2% (237.5 vs 177), but the i3-13100F wins Cinebench R23 single-core by 6.3% (1758 vs 1647) and PassMark single-thread by 11.6% (3609 vs 3192).

Q: What is the TDP difference?

A: The i7-1255U has a TDP of 15W, while the i3-13100F has a TDP of 58W. This reflects the mobile versus desktop design targets.

Q: Do both CPUs support the same memory?

A: Yes, both support DDR4 and DDR5 memory in dual-channel mode, and neither supports ECC memory.

The Verdict

The data points to a clear split. Choose the Intel Core i7-1255U if the workload is dominated by legacy single-threaded applications (Cinebench R15 single-core win of 34.2%), data encryption (9% faster), integer math (12.7% faster), or if integrated graphics are required — the Iris Xe 96EU eliminates the need for a discrete GPU. The i7-1255U is also the pick for space- and power-constrained systems, given its 15W TDP versus 58W on the i3-13100F.

Choose the Intel Core i3-13100F for almost everything else. The 33.5% lead in Cinebench R23 multi-core makes it the obvious choice for rendering and video work. The 27.8% edge in extended instructions and 34.4% lead in prime number finding show superior vectorized and tight-loop performance. The i3-13100F also wins modern single-threaded benchmarks (Cinebench R23 and R20 single-core), meaning newer software will run faster. The PCIe Gen 5 support with 20 lanes provides a bandwidth advantage for future storage and GPUs. With a launch MSRP of $109, the i3-13100F offers a desktop-oriented feature set that the mobile i7-1255U cannot match in sustained workloads, despite the nearly identical average benchmark scores. The verdict from the data is direct: the i3-13100F is the performance pick for desktop users, while the i7-1255U serves mobile and power-conscious systems with specific single-thread and encryption strengths.