Intel Core i5-1335U vs Intel Core i5-1345U Comparison

Head-to-Head Benchmarks

The data shows a clear split between these two Raptor Lake-U mobile processors. The Intel Core i5-1345U takes the majority of benchmark wins, securing 13 out of 17 head-to-head tests, while the Intel Core i5-1335U wins 4. However, the margin of victory matters more than the count, and the 1335U's wins are substantial in specific workloads.

The most dramatic difference appears in Cinebench R23 multi-core. The 1335U scores 8889.5 versus the 1345U's 7724, a 13.1% advantage. This is the single largest delta in the entire comparison. Cinebench R15 multi-core tells a similar story: the 1335U scores 1464 against 1311, a 10.5% lead. These are not small differences; they represent meaningful performance gaps in heavily threaded rendering workloads.

The 1345U counters in single-core performance. In Cinebench R23 single-core, it scores 1724 versus 1684.5, a 2.3% edge. The Cinebench R15 single-core test shows 240 versus 238, a 0.8% lead, and Cinebench R20 single-core shows 697 versus 696, a 0.1% margin. These are narrow wins, but they are consistent across all three Cinebench single-core iterations.

The PassMark suite favors the 1345U more broadly. In integer math, the 1345U scores 52847 against 51244, a 3.1% advantage. Random string sorting shows 18888 versus 17953, a 5.2% lead, which is the largest PassMark delta. Data compression comes in at 164005 versus 159593, a 2.8% edge, and data encryption shows 10288 versus 10009, also 2.8%. The 1345U also wins floating point math (35939 vs 35176, 2.2%), extended instructions (9178 vs 8974, 2.3%), and multithread (14511 vs 14281, 1.6%).

The 1335U's other wins are smaller. PassMark physics shows 837 versus 818, a 2.3% lead, and find prime numbers shows 48 versus 47, a 2.1% edge. Both chips sit at the 73rd percentile among all CPUs, so neither is a standout in the broader market, but their relative positioning is clear.

Where Each One Wins

The Intel Core i5-1335U is the pick for sustained multi-threaded workloads. Its Cinebench R23 multi-core score of 8889.5, which is 13.1% ahead of the 1345U, points to superior performance in video rendering, 3D modeling, and other tasks that scale across all cores. The R15 multi-core result of 1464, a 10.5% advantage, reinforces this pattern. If a workload keeps all 10 cores busy for extended periods, the 1335U will finish noticeably sooner.

The Intel Core i5-1345U wins the more heterogeneous mix of everyday and professional tasks. Its PassMark integer math score of 52847, 3.1% ahead, matters for general application logic and office productivity. Data compression at 164005, 2.8% ahead, speeds up file archiving and database operations. The 5.2% lead in random string sorting (18888 vs 17953) helps with text processing and log analysis. For single-threaded responsiveness, the 1345U leads in every Cinebench single-core test, with the largest margin being 2.3% in R23.

The 1335U's physics score of 837, 2.3% ahead, suggests a slight edge in certain simulation or gaming physics calculations, but this is a narrow margin. The 1345U's broader PassMark wins, covering encryption, extended instructions, floating point, and multithread, make it the more balanced chip for mixed usage. The database average benchmark scores reflect this: the 1345U averages 19411, while the 1335U averages 18982, a difference of about 2.3%.

Architecture Differences

Both processors are built on the same fundamental design. They share the Raptor Lake architecture with the Raptor Lake-U codename, fabricated on Intel's 10 nm process. Each has 10 cores and 12 threads, arranged in the hybrid configuration typical of this generation. The cache hierarchy is identical: 80 KB of L1 per core, 1.25 MB of L2 per core, and 12 MB of shared L3.

The key architectural difference is clock speed. The 1345U has a base clock of 1600 MHz and a boost clock of 4.70 GHz. The 1335U has a base clock of 1300 MHz and a boost clock of 4.60 GHz. The 1345U's 300 MHz higher base clock likely contributes to its wins in single-threaded and lightly threaded tests, while the 1335U's ability to win multi-core tests despite a lower base clock suggests different power management or binning behavior that allows it to sustain higher all-core operation.

Both chips have a 15 W TDP, use the Intel BGA 1744 socket, and support DDR4 and DDR5 memory in dual-channel configuration. PCIe connectivity is Gen 4 with 8 lanes available from the CPU. Both integrate Iris Xe Graphics with 80 execution units, so integrated graphics capability is identical. Neither supports ECC memory, and both have locked multipliers. The 1345U carries the part number SRMLZ, while the 1335U is SRMEX.

FAQ

Q: Which processor is faster in multi-core Cinebench tests?

A: The Intel Core i5-1335U wins decisively. It scores 8889.5 in Cinebench R23 multi-core versus 7724 for the 1345U, a 13.1% advantage, and 1464 versus 1311 in R15 multi-core, a 10.5% lead.

Q: Does the Intel Core i5-1345U have any single-core advantage?

A: Yes, consistently but modestly. It leads in all three Cinebench single-core tests: 240 vs 238 in R15, 697 vs 696 in R20, and 1724 vs 1684.5 in R23. The largest margin is 2.3% in R23.

Q: How do the two chips compare in PassMark integer math performance?

A: The 1345U scores 52847 against 51244 for the 1335U, a 3.1% edge. This is the largest PassMark delta between the two in integer operations.

Q: Are these processors on the same socket and platform?

A: Yes. Both use the Intel BGA 1744 socket, have a 15 W TDP, support DDR4 and DDR5 memory, and use PCIe Gen 4 with 8 CPU lanes. They are both Raptor Lake-U parts on Intel's 10 nm process.

Q: Which chip has a higher boost clock?

A: The Intel Core i5-1345U has a boost clock of 4.70 GHz, while the 1335U boosts to 4.60 GHz. The 1345U also has a higher base clock at 1600 MHz versus 1300 MHz.

Q: Is the integrated graphics different between the two?

A: No. Both integrate Iris Xe Graphics with 80 execution units. There is no difference in iGPU capability based on the recorded data.

Specification Differences

The two processors differ in only a few documented fields. The base clock is 1600 MHz for the 1345U and 1300 MHz for the 1335U. The boost clock is 4.70 GHz for the 1345U and 4.60 GHz for the 1335U. The launch MSRP is $309 for the 1345U and $340 for the 1335U. The part numbers differ: SRMLZ for the 1345U and SRMEX for the 1335U.

All other core specifications are identical: 10 cores, 12 threads, 15 W TDP, Intel BGA 1744 socket, Raptor Lake architecture with Raptor Lake-U codename, 10 nm process, 80 KB L1 per core, 1.25 MB L2 per core, 12 MB shared L3, DDR4 and DDR5 support, dual-channel memory bus, no ECC, PCIe Gen 4 with 8 lanes, Iris Xe Graphics 80EU, mobile market segment, active production status, and a release date of January 3, 2023. Both are locked multipliers.

The average benchmark scores also differ: the 1345U averages 19411, while the 1335U averages 18982. Both sit at the 73rd percentile among all CPUs.

The Verdict

The choice between these two comes down to workload type, and the data is unambiguous. If the priority is multi-threaded rendering or all-core compute, the Intel Core i5-1335U is the stronger option. Its 13.1% lead in Cinebench R23 multi-core and 10.5% lead in R15 multi-core are substantial margins that translate directly into shorter render times. The 1335U also has a slight edge in physics and prime number finding, though those deltas are small.

If the priority is a more balanced mix of single-threaded responsiveness and diverse multi-threaded tasks, the Intel Core i5-1345U is the better choice. It wins 13 of 17 benchmark comparisons, including all single-core tests and the majority of PassMark workloads. Its 5.2% lead in random string sorting and 3.1% lead in integer math indicate strengths in data processing and general application performance. The 1345U also has a higher base clock (1600 MHz vs 1300 MHz) and higher boost clock (4.70 GHz vs 4.60 GHz), which aligns with its single-thread wins.

The 1345U's average benchmark score of 19411 versus 18982 for the 1335U gives it a narrow overall edge. However, the 1335U's multi-core dominance in Cinebench is the single most decisive result in this comparison. For a laptop used primarily for rendering, video encoding, or other fully threaded tasks, that 13.1% advantage will be felt on every job. For a general-purpose machine handling varied workloads, the 1345U's broader set of wins and higher average score make it the safer all-rounder.

The 1335U costs more at launch MSRP ($340 vs $309), but the database records no performance-per-dollar metric, so any purchasing decision must weigh the multi-core advantage against that higher launch price. Both processors share the same architecture, cache, and graphics, so the decision is purely about which benchmark pattern matches the intended use case.