Intel Core i5-12600HE vs Intel Core i9-9820X Comparison

Head-to-Head Benchmarks

The benchmark data shows a clean sweep for the Intel Core i9-9820X, winning all six head-to-head comparisons against the Intel Core i5-12600HE. The margins, however, are remarkably thin across every test, making this a closer contest than the raw win count suggests.

In Cinebench R15 multi-core, the i9-9820X scores 1759 against the i5-12600HE's 1735, a 1.4% advantage. The single-core R15 result tells a similar story: 248 versus 244, a 1.6% edge for the older desktop part. This is the largest single delta in the entire comparison, yet it still represents only a handful of points.

Moving to Cinebench R20, the i9-9820X again leads in multi-core with 7332 versus 7231, and in single-core with 1034 versus 1020. Both deltas sit at 1.4%. The pattern holds in Cinebench R23, where the i9-9820X posts 17459 in multi-core against 17217, and 2464 in single-core against 2430. Each of these four tests shows the same 1.4% margin, indicating a consistent, if modest, performance advantage for the 10-core desktop processor.

Notably, the i5-12600HE never manages to close the gap on any test. The closest result is the R15 single-core run, where the mobile chip trails by just 4 points. The widest gap appears in R23 multi-core, a difference of 242 points. Across the entire benchmark suite, the i9-9820X maintains a narrow but unbroken lead, evidence of the high per-core clocks and thread count of the older Skylake-X design.

Architecture Differences

The two processors come from different eras and target different segments, and the architectural gap is substantial. The Intel Core i9-9820X is built on the Skylake-X architecture, using Intel's 14 nm process, and belongs to the Core i9 X-Series 9th Gen family. It packs 10 cores and 20 threads, a configuration that relies on Hyper-Threading to double its thread count. The i5-12600HE, in contrast, uses the Alder Lake-H architecture on a 10 nm node, part of the Core 12th Gen series, and offers 12 cores but only 16 threads. The hybrid Alder Lake design does not provide the same thread multiplier, leaving the i5 with fewer threads despite more physical cores.

Cache allocations also differ. The i9-9820X provides 64 KB of L1 per core, 1 MB of L2 per core, and a shared 16.5 MB L3 pool. The i5-12600HE counters with 80 KB of L1 per core, 1.25 MB of L2 per core, and a larger 18 MB shared L3. The i5 therefore has a per-core cache advantage and a larger total L3, which helps explain its competitiveness despite the lower thread count and significantly lower TDP.

Clock speeds tell a mixed story. The i9-9820X has a base clock of 3.30 GHz and a boost clock of 4.20 GHz. The i5-12600HE starts lower at 2.50 GHz base but boosts higher to 4.50 GHz. That higher boost ceiling on the mobile chip narrows the single-core performance gap, though the i9 still wins every single-core test by a small margin.

The memory subsystem is a point of clear divergence. The i9-9820X supports DDR4 over a quad-channel bus, delivering a measured memory bandwidth of 85.3 GB/s. The i5-12600HE supports both DDR4 and DDR5 over a dual-channel bus, with no bandwidth figure recorded in the database. The i9's quad-channel design is a workstation-class feature, while the i5's dual-channel configuration is typical of mobile parts.

PCIe support also differs. The i9-9820X provides PCIe Gen 3 with 44 lanes from the CPU, a generous allocation for multi-GPU or expansion-heavy desktop builds. The i5-12600HE offers PCIe Gen 4 with 20 lanes, which doubles the per-lane bandwidth of the older standard but reduces the total lane count. The i9-9820X also includes an unlocked multiplier, while the i5-12600HE is locked, and the i9 has no integrated graphics whereas the i5 includes Iris Xe 80EU. The i9's launch MSRP was $889.

Production status separates them further: the i9-9820X is end-of-life, while the i5-12600HE remains active. The i9 uses the Intel Socket 2066 platform, the i5 uses Intel BGA 1744, meaning the latter is soldered and not upgradeable. The i5's die size is recorded at 217 mm², while no die size is listed for the i9.

FAQ

Q: Which processor wins more benchmarks in the database?

A: The Intel Core i9-9820X wins all six head-to-head tests, covering Cinebench R15, R20, and R23 in both single-core and multi-core modes.

Q: What is the largest performance gap between the two?

A: The largest gap is in Cinebench R15 single-core, where the i9-9820X leads by 1.6%. All other tests show a 1.4% advantage for the i9.

Q: Does the i5-12600HE have more cores than the i9-9820X?

A: Yes, the i5-12600HE has 12 cores against the i9-9820X's 10 cores, but the i9 has 20 threads versus 16 for the i5.

Q: How do their cache sizes compare?

A: The i9-9820X has 64 KB L1 and 1 MB L2 per core, plus 16.5 MB shared L3. The i5-12600HE has 80 KB L1 and 1.25 MB L2 per core, plus 18 MB shared L3.

Q: Which processor has the higher boost clock?

A: The i5-12600HE boosts to 4.50 GHz, while the i9-9820X boosts to 4.20 GHz. The i9 has the higher base clock at 3.30 GHz versus 2.50 GHz.

Q: What memory configurations do they support?

A: The i9-9820X supports DDR4 over a quad-channel bus with 85.3 GB/s bandwidth. The i5-12600HE supports DDR4 and DDR5 over a dual-channel bus.

The Verdict

The data points to a clear but narrow victory for the Intel Core i9-9820X. It wins every benchmark in the comparison, yet the margin never exceeds 1.6% and sits at 1.4% for five of the six tests. This is not a dominant performance gap; it is a consistent edge that holds across different Cinebench versions and workload types.

The i9-9820X is the better choice for users who need the maximum thread count and quad-channel memory bandwidth. Its 20 threads, unlocked multiplier, and 44 PCIe Gen 3 lanes make it suited to heavily threaded desktop workloads where expansion capability matters. The 85.3 GB/s memory bandwidth is a workstation-oriented feature that the i5 cannot match.

The i5-12600HE, despite losing every head-to-head, remains a viable alternative in the context of its design goals. Its 12 cores, larger L3 cache, higher boost clock, and support for DDR5 all contribute to performance that lands within 1.6% of a much higher-TDP desktop part. It also includes integrated Iris Xe 80EU graphics, a feature entirely absent from the i9.

The verdict depends on platform priorities. For raw benchmark scores alone, the i9-9820X is the winner. For a mobile or embedded platform with lower power draw, the i5-12600HE is the only realistic option of the two, and the performance cost is minimal.

Specification Differences

• Cores: i9-9820X has 10 cores; i5-12600HE has 12 cores
• Threads: i9-9820X has 20 threads; i5-12600HE has 16 threads
• Base clock: 3.30 GHz versus 2.50 GHz
• Boost clock: 4.20 GHz versus 4.50 GHz
• TDP: 165 W versus 45 W
• Socket: Intel Socket 2066 versus Intel BGA 1744
• Architecture: Skylake-X versus Alder Lake-H
• Process node: 14 nm versus 10 nm
• Die size: not recorded versus 217 mm²
• L1 cache: 64 KB per core versus 80 KB per core
• L2 cache: 1 MB per core versus 1.25 MB per core
• L3 cache: 16.5 MB shared versus 18 MB shared
• Memory support: DDR4 versus DDR4, DDR5
• Memory bus: Quad-channel versus Dual-channel
• Memory bandwidth: 85.3 GB/s versus not recorded
• PCIe: Gen 3, 44 lanes versus Gen 4, 20 lanes
• Integrated graphics: none versus Iris Xe 80EU
• Market segment: Desktop versus Mobile
• Production status: End-of-life versus Active
• Multiplier unlocked: yes versus no
• Part number: SREZ8 versus SRLE5

Where Each One Wins

The Intel Core i9-9820X wins every recorded benchmark, so its strengths are straightforward to enumerate. It leads in Cinebench R15 multi-core by 1.4%, R15 single-core by 1.6%, R20 multi-core by 1.4%, R20 single-core by 1.4%, R23 multi-core by 1.4%, and R23 single-core by 1.4%. These are the only measured comparisons in the database, and the i9 takes all of them.

Beyond raw scores, the i9-9820X is positioned for desktop workloads that benefit from its thread count and memory bandwidth. The quad-channel DDR4 interface with 85.3 GB/s bandwidth is a clear advantage for memory-intensive applications. The 44 PCIe Gen 3 lanes support extensive expansion, and the unlocked multiplier allows tuning for users who want to push clocks higher.

The i5-12600HE, while winless in direct comparison, has strengths that are visible in the specification data. Its 12 cores provide more physical cores than the i9, and the larger 18 MB L3 cache combined with 80 KB L1 and 1.25 MB L2 per core gives it a per-core cache advantage. The higher 4.50 GHz boost clock helps it stay within 1.6% of the i9 in single-core tests despite a much lower 45 W TDP. Support for both DDR4 and DDR5 memory adds flexibility, and the integrated Iris Xe 80EU graphics make it a complete package for systems without a discrete GPU. The active production status and mobile BGA socket also make it suitable for compact, power-sensitive designs where the end-of-life i9 cannot fit.