Intel Core i5-1345U vs Intel Core i7-11800H Comparison

Head-to-Head Benchmarks

The benchmark data presents a decisive picture: the Intel Core i7-11800H wins 14 of the 17 recorded head-to-head comparisons, while the Intel Core i5-1345U takes only 3. The margin of victory, however, varies dramatically by workload type, revealing two very different processor personalities.

The most striking divergence appears in multi-core rendering. In Cinebench R23 multi-core, the i7-11800H scores 16,663 against the i5-1345U's 7,724, a staggering 115.7% advantage. This is the largest delta in the entire comparison. The gap persists across older Cinebench versions as well: R20 multi-core shows 6,998 versus 4,942 (41.6% ahead), and R15 multi-core shows 1,679 versus 1,311 (28.1% ahead). These results indicate that the i7-11800H's 8 cores and 16 threads provide a substantial throughput advantage over the i5-1345U's 10 cores and 12 threads in heavily threaded workloads.

Single-core performance tells a more nuanced story. The i5-1345U wins PassMark single-thread with 3,415 against 3,043, a 10.9% advantage. It also edges out the i7-11800H in Cinebench R15 single-core, 240 versus 236, though this margin is only 1.7%. However, the i7-11800H strikes back decisively in Cinebench R20 single-core (987 versus 697, a 41.6% win) and Cinebench R23 single-core (2,352 versus 1,724, a 36.4% win). This inconsistency across single-thread tests suggests that the two processors respond differently to the specific instruction mixes used by each benchmark suite.

Integer and floating-point math workloads favor the i7-11800H substantially. PassMark integer math shows 71,423 versus 52,847, a 35.2% lead. Floating-point math shows 42,423 versus 35,939, an 18% advantage. The gap widens further in extended instructions, where the i7-11800H posts 16,068 against 9,178, a 75.1% margin. Prime number finding also favors the i7-11800H by 80.9% (85 versus 47).

Data processing tasks follow a similar pattern. Random string sorting shows the i7-11800H ahead by 50.4% (28,411 versus 18,888). Data compression shows a 45.9% lead (239,304 versus 164,005). Even data encryption, where the margin is smaller, still favors the i7-11800H by 19% (12,241 versus 10,288). The PassMark multithread score confirms the overall trend: 20,012 for the i7-11800H versus 14,511 for the i5-1345U, a 37.9% advantage. Physics simulation also goes to the i7-11800H, 938 versus 818, a 14.7% lead.

Where Each One Wins

The i5-1345U's wins are narrow but meaningful. Its PassMark single-thread score of 3,415 represents a 10.9% improvement over the i7-11800H, making it the better choice for lightly threaded applications that rely on a single core's peak performance. The Cinebench R15 single-core result, while close, also goes to the i5-1345U, suggesting that very short single-thread bursts may favor the newer architecture.

The i7-11800H, by contrast, dominates every multi-threaded and compute-intensive category. Its largest margins come in Cinebench R23 multi-core (115.7%), extended instructions (75.1%), and prime number finding (80.9%). These are workloads that scale with core count and thread count, where the i7-11800H's 8 cores and 16 threads overwhelm the i5-1345U's 10 cores but only 12 threads. The i7-11800H also wins all three Cinebench multi-core tests, all PassMark math tests, data compression, encryption, sorting, and physics.

For content creation workflows that rely on Cinebench-class rendering, the i7-11800H is clearly superior. For data encryption tasks, the i7-11800H's 19% lead is still significant. The i5-1345U's single-thread win in PassMark suggests it may feel snappier in everyday desktop tasks, but the i7-11800H counters with stronger single-thread results in Cinebench R20 and R23, making the overall single-thread picture mixed.

The Verdict

The data directs different users to different processors. The i7-11800H is the choice for multi-threaded productivity, rendering, scientific computing, and any workload that can utilize more than 8 threads. Its 115.7% lead in Cinebench R23 multi-core is the single strongest argument in this comparison, and its consistent 14-to-3 win record across all head-to-head benchmarks makes it the overall performance leader.

The i5-1345U, with a 73rd percentile versus the i7-11800H's 74th percentile among all CPUs, is only slightly behind in overall standing. Its 10.9% PassMark single-thread advantage and its lower thermal design power of 15 watts against 35 watts suggest it is optimized for efficiency and light-duty tasks. The i5-1345U also supports DDR5 memory, while the i7-11800H is limited to DDR4, which may matter for platform longevity.

For users who prioritize raw compute throughput, the i7-11800H is the clear winner. For users who prioritize single-thread responsiveness and power efficiency, the i5-1345U has a legitimate case, though the i7-11800H's single-thread results in Cinebench R20 and R23 complicate that narrative. The average benchmark scores are close (19,998 for the i7-11800H versus 19,411 for the i5-1345U), placing both in the same performance tier, but the distribution of wins strongly favors the i7-11800H.

FAQ

Q: Which processor is faster in multi-core workloads?

A: The Intel Core i7-11800H wins every multi-core benchmark in the comparison. Its largest margin is in Cinebench R23 multi-core, where it scores 16,663 against the i5-1345U's 7,724, a 115.7% advantage.

Q: Does the i5-1345U win any benchmarks?

A: Yes, the i5-1345U wins 3 of 17 head-to-head tests: PassMark single-thread (3,415 versus 3,043, a 10.9% lead), PassMark singlethread (same scores), and Cinebench R15 single-core (240 versus 236, a 1.7% lead).

Q: How do the core counts compare?

A: The i7-11800H has 8 cores and 16 threads, while the i5-1345U has 10 cores and 12 threads. Despite fewer cores, the i7-11800H wins all multi-threaded tests, indicating its thread count advantage is more significant than the raw core count difference.

Q: What is the thermal design power difference?

A: The i7-11800H has a TDP of 35 watts, while the i5-1345U has a TDP of 15 watts. This indicates the i5-1345U is designed for lower power consumption, though the i7-11800H delivers substantially higher multi-threaded performance.

Q: Which processor has better single-thread performance?

A: The results are mixed. The i5-1345U wins PassMark single-thread by 10.9% and Cinebench R15 single-core by 1.7%, but the i7-11800H wins Cinebench R20 single-core by 41.6% and Cinebench R23 single-core by 36.4%.

Q: How do these processors rank among all CPUs?

A: The i7-11800H sits at the 74th percentile, while the i5-1345U sits at the 73rd percentile. Their average benchmark scores are 19,998 and 19,411 respectively, placing them in nearly the same overall performance tier.

Architecture Differences

The two processors come from different generations and target different market segments. The i7-11800H is based on Tiger Lake-H architecture, released in May 2021, while the i5-1345U uses Raptor Lake-U architecture, released in January 2023. Both are manufactured on Intel's 10 nm process node.

The core configurations differ significantly. The i7-11800H uses 8 cores and 16 threads, while the i5-1345U uses 10 cores and 12 threads. This suggests the i5-1345U employs a hybrid core arrangement, likely combining performance and efficiency cores, though the exact mix is not specified in the data. The i7-11800H has a base clock of 1900 MHz and a boost clock of 4.60 GHz, while the i5-1345U has a base clock of 1600 MHz and a boost clock of 4.70 GHz.

Cache allocations are notably different. The i7-11800H features 24 MB of shared L3 cache, while the i5-1345U has only 12 MB of shared L3 cache. Both processors have identical L1 and L2 cache configurations: 80 KB per core for L1 and 1.25 MB per core for L2.

Memory support diverges as well. The i7-11800H supports DDR4 with dual-channel memory and a bandwidth of 51.2 GB/s. The i5-1345U supports both DDR4 and DDR5, also dual-channel, though its bandwidth figure is not recorded. The i7-11800H has 20 PCIe Gen 4 lanes from the CPU, while the i5-1345U has only 8 PCIe Gen 4 lanes.

Integrated graphics differ between the two. The i7-11800H pairs with UHD Graphics 750, while the i5-1345U includes Iris Xe Graphics 80EU. Both processors are mobile-market parts with active production status, use different sockets (Intel BGA 1787 for the i7-11800H, Intel BGA 1744 for the i5-1345U), and neither has an unlocked multiplier. The i7-11800H has a die size of 190 mm², while the i5-1345U's die size is not recorded. The i7-11800H launched at an MSRP of $395, while the i5-1345U launched at $309.