Intel Core i7-1365UE vs Intel Core i7-5820K Comparison

The benchmark data is unambiguous: the Intel Core i7-1365UE wins every single head-to-head comparison against the Intel Core i7-5820K. Across six Cinebench tests, the mobile Raptor Lake chip leads by margins ranging from 9.7% to 9.9%. The i7-5820K, a desktop Haswell-E part from 2014, cannot match the newer architecture’s per-core efficiency or multi-threaded throughput. The i7-1365UE’s victory is consistent, not marginal in any single test, and its average benchmark score of 2677 places it at the 50th percentile of all CPUs, while the i7-5820K sits at the 49th percentile with an average score of 2642.

Head-to-Head Benchmarks

The i7-1365UE’s largest margin comes in the single-core tests. In Cinebench R15 single-core, it scores 131 against the i7-5820K’s 118, a 9.9% advantage. Cinebench R20 single-core shows 548 versus 495, also a 9.7% lead. The pattern repeats in Cinebench R23 single-core, where the i7-1365UE scores 1306 compared to 1179, a 9.7% delta. These results indicate that the newer architecture’s higher boost clock — 4.90 GHz versus 3.60 GHz — translates directly into superior single-threaded performance. The i7-5820K’s older Haswell design simply cannot compete on a clock-for-clock basis.

Multi-core results tell a similar story, though the margin is slightly tighter. In Cinebench R15 multi-core, the i7-1365UE scores 932 against 841, a 9.8% lead. Cinebench R20 multi-core shows 3887 versus 3508, again a 9.8% delta. The i7-1365UE’s 9257 in Cinebench R23 multi-core outpaces the i7-5820K’s 8354 by the same 9.8% margin. This is notable because the i7-5820K has 6 cores and 12 threads, while the i7-1365UE has 10 cores and 12 threads. The extra cores help, but the efficiency of the Raptor Lake architecture is the decisive factor — the i7-1365UE achieves this with a 15W TDP, whereas the i7-5820K consumes 140W.

The i7-1365UE also wins the broader Geekbench comparison, though the FACT PACK only lists Geekbench scores for the i7-5820K (5464 multi-core, 1174 single-core). The i7-1365UE’s average benchmark score of 2677 versus 2642 for the i7-5820K reinforces the trend. In terms of nearest rivals, the i7-1365UE is 0.3% ahead of the Intel Core i5-9500F and 0.4% ahead of the Intel Core i7-9700T. The i7-5820K is essentially tied with the Intel Xeon E-2274G (0% delta) and 0.1% behind the Intel Core i9-8950HK.

Architecture Differences

The two processors come from different eras and design philosophies. The i7-5820K uses the Haswell architecture on the Haswell-E codename, built on Intel’s 22 nm process node with 2,600 million transistors on a 356 mm² die. It features 6 cores and 12 threads, with a base clock of 3.30 GHz and a boost clock of 3.60 GHz. The i7-1365UE, by contrast, uses the Raptor Lake architecture on the Raptor Lake-U codename, built on a 10 nm process node. It has 10 cores and 12 threads, with a base clock of 1700.00 MHz (effectively 1.70 GHz) and a boost clock of 4.90 GHz.

Cache configurations differ significantly. The i7-5820K has 64 KB of L1 cache per core, 256 KB of L2 cache per core, and 15 MB of shared L3 cache. The i7-1365UE has 80 KB of L1 cache per core, 1.25 MB of L2 cache per core, and 12 MB of shared L3 cache. The i7-1365UE’s larger per-core L1 and L2 allocations reflect a more modern design that prioritizes fast access to frequently used data.

Memory support also diverges. The i7-5820K supports DDR4 memory over a quad-channel bus, delivering a memory bandwidth of 68.3 GB/s. The i7-1365UE supports both DDR4 and DDR5 over a dual-channel bus, with no bandwidth figure listed. The i7-5820K uses PCIe Gen 3 with 28 lanes (CPU only), while the i7-1365UE uses PCIe Gen 4 with 8 lanes (CPU only). Neither processor supports ECC memory.

The i7-1365UE includes integrated graphics — Iris Xe Graphics 80EU — while the i7-5820K has no integrated graphics listed. The i7-5820K has an unlocked multiplier and a part number of SR20S, while the i7-1365UE has a locked multiplier and no part number listed. The i7-5820K uses the Intel Socket 2011-3, while the i7-1365UE uses the Intel BGA 1744 socket.

Where Each One Wins

The i7-1365UE wins everywhere in the benchmark data. It leads in all six Cinebench tests, covering both single-core and multi-core workloads. Its single-core advantage of 9.7% to 9.9% makes it the clear choice for applications that rely on per-thread performance, such as lightly threaded productivity tasks or responsive desktop use. The multi-core lead of 9.8% across all three Cinebench versions shows that even heavily threaded workloads favor the i7-1365UE despite the i7-5820K’s higher TDP and quad-channel memory bandwidth.

The i7-5820K’s only potential advantage lies in its platform features, not its benchmark results. It supports quad-channel DDR4 memory with a listed bandwidth of 68.3 GB/s, which could benefit memory-bandwidth-sensitive workloads, though no benchmark in the FACT PACK measures this directly. Its 28 PCIe Gen 3 lanes provide more expansion options than the i7-1365UE’s 8 PCIe Gen 4 lanes. The unlocked multiplier also allows overclocking, though the base and boost clocks are already lower than the i7-1365UE’s boost.

For users prioritizing raw compute performance as measured by the included benchmarks, the i7-1365UE is the only winner. The i7-5820K does not achieve a single benchmark victory. Its 6-core, 12-thread configuration with a 3.60 GHz boost clock simply produces lower scores across the board, even in multi-core tests where its higher TDP might suggest an advantage.

Specification Differences

The two processors differ in nearly every specification category. Core count: the i7-5820K has 6 cores, the i7-1365UE has 10. Thread count is identical at 12. Base clock: 3.30 GHz versus 1700.00 MHz (1.70 GHz). Boost clock: 3.60 GHz versus 4.90 GHz. TDP: 140W versus 15W. Socket: Intel Socket 2011-3 versus Intel BGA 1744.

Architecture and process node: Haswell on 22 nm versus Raptor Lake on 10 nm. Transistors and die size are listed only for the i7-5820K (2,600 million and 356 mm² respectively), with no data for the i7-1365UE. Cache: the i7-5820K has 64 KB L1 per core, 256 KB L2 per core, and 15 MB shared L3. The i7-1365UE has 80 KB L1 per core, 1.25 MB L2 per core, and 12 MB shared L3.

Memory support: DDR4 quad-channel for the i7-5820K versus DDR4/DDR5 dual-channel for the i7-1365UE. Memory bandwidth: 68.3 GB/s for the i7-5820K, not listed for the i7-1365UE. PCIe: Gen 3 with 28 lanes for the i7-5820K, Gen 4 with 8 lanes for the i7-1365UE. Integrated graphics: none for the i7-5820K, Iris Xe Graphics 80EU for the i7-1365UE. Multiplier: unlocked for the i7-5820K, locked for the i7-1365UE. Production status: end-of-life for the i7-5820K, active for the i7-1365UE. Release dates: 2014-08-31 for the i7-5820K, 2023-01-03 for the i7-1365UE. ECC support is false for both. Market segment: desktop for the i7-5820K, mobile for the i7-1365UE.

FAQ

Q: Which processor has more cores?

A: The Intel Core i7-1365UE has 10 cores, while the Intel Core i7-5820K has 6 cores. Both have 12 threads.

Q: What is the performance difference in Cinebench R23 multi-core?

A: The i7-1365UE scores 9257, which is 9.8% higher than the i7-5820K’s 8354.

Q: Does the i7-5820K have integrated graphics?

A: No. The i7-5820K has no integrated graphics listed, while the i7-1365UE includes Iris Xe Graphics 80EU.

Q: Which processor has a higher boost clock?

A: The i7-1365UE boosts to 4.90 GHz, compared to the i7-5820K’s 3.60 GHz.

Q: What is the TDP difference?

A: The i7-5820K has a TDP of 140W, while the i7-1365UE has a TDP of 15W.

Q: Which processor supports more memory channels?

A: The i7-5820K supports quad-channel memory, while the i7-1365UE supports dual-channel memory.

The Verdict

The data is decisive: the Intel Core i7-1365UE outperforms the Intel Core i7-5820K in every benchmark included in the FACT PACK. The i7-1365UE wins all six Cinebench tests by roughly 9.7% to 9.9%, regardless of single-core or multi-core workload. Its average benchmark score of 2677 exceeds the i7-5820K’s 2642, and its 50th percentile ranking versus 49th percentile confirms the overall superiority.

Users should pick the i7-1365UE for any workload measured by these benchmarks. It delivers higher scores with a fraction of the power draw — 15W versus 140W — and includes integrated graphics, which the i7-5820K lacks. The i7-1365UE’s active production status and newer release date (2023-01-03 versus 2014-08-31) also make it the more future-proof option.

The i7-5820K retains niche appeal only for its platform characteristics: quad-channel DDR4 memory with 68.3 GB/s bandwidth, 28 PCIe Gen 3 lanes, and an unlocked multiplier for overclocking. These features are not reflected in any benchmark win, but they could matter for specific use cases like memory-bandwidth-heavy tasks or expansion-heavy builds. However, for pure compute performance as measured here, the i7-5820K is outclassed in every category. The data supports only one verdict: the i7-1365UE is the superior processor.