Intel Core Ultra 7 366H vs Intel Xeon 6357P Comparison

The Intel Core Ultra 7 366H and the Intel Xeon 6357P are both active 87th-percentile performers, but they achieve that standing through fundamentally different designs. The Core Ultra 7 366H, a mobile Panther Lake chip, wins 13 of 17 head-to-head benchmarks, while the Xeon 6357P, a Raptor Lake Refresh workstation part, takes 4. The data shows a clear split: the 366H dominates in rendering, encryption, and floating-point workloads, while the 6357P counters in integer math, data compression, and raw single-thread Passmark scores. The choice hinges on whether the workload favors the 366H’s higher core count and newer node, or the 6357P’s higher boost clock and larger L3 cache.

The Verdict

For mobile professionals and creators, the Intel Core Ultra 7 366H is the definitive pick. Its 16-core, 16-thread Panther Lake design on a 3 nm node delivers a 8.9% lead over the Xeon in every Cinebench test, from R15 multicore (2870 vs 2635) to R23 single-core (4020 vs 3691). The 366H also crushes the Xeon in floating-point math (103615 vs 74460, a 39.2% advantage) and physics (2880 vs 2305, up 24.9%). With a 25 W TDP and integrated Xe3 Graphics, it is built for battery-powered systems where the Xeon’s 80 W TDP and lack of iGPU make it impractical.

For a server or workstation with a fixed power budget, the Intel Xeon 6357P is the better choice in specific niches. Its 8 cores and 16 threads run at a 3.00 GHz base and 5.40 GHz boost, enabling a 4.5% win in Passmark single-thread (4233 vs 4043) and a 14% lead in integer math (97375 vs 83695). It also leads in data compression (353521 vs 327455, up 7.4%). Crucially, it supports ECC memory, which the 366H does not, making it the only option here for error-correcting memory in data-critical environments. The Xeon’s launch MSRP is $556.

The tie-breaker is the workload. If the task is multi-threaded rendering or encryption, the 366H wins by double digits. If the task is integer-heavy compression or requires ECC, the 6357P is the only rational choice. The data does not support a single “best” CPU; it supports two distinct usage profiles.

Architecture Differences

The two processors come from different Intel families and process nodes. The Core Ultra 7 366H uses the Panther Lake architecture on a 3 nm process, while the Xeon 6357P uses Raptor Lake on a 10 nm node. This node gap is reflected in power efficiency: the 366H has a 25 W TDP versus 80 W for the Xeon, yet the 366H still wins most benchmarks.

Core counts differ significantly. The 366H has 16 cores and 16 threads, meaning no hyperthreading. The Xeon has 8 cores and 16 threads, using hyperthreading to match thread count. The 366H’s base clock is 2.00 GHz with a boost of 4.80 GHz; the Xeon starts higher at 3.00 GHz and boosts to 5.40 GHz. The Xeon’s higher clocks are its primary asset, but the 366H’s extra physical cores win out in multi-threaded tests.

Cache layouts are also distinct. The 366H has 192 KB of L1 per core, 2.5 MB of L2 per core, and 18 MB of shared L3. The Xeon has 80 KB of L1 per core, 2 MB of L2 per core, and 24 MB of shared L3. The Xeon’s larger L3 (24 MB vs 18 MB) provides a 33% capacity advantage, which likely aids its integer and compression wins. The 366H’s larger per-core L1 and L2, however, may help its floating-point and encryption performance.

Memory support differs as well. The 366H supports DDR5 and LPDDR5X over a dual-channel bus with 115.2 GB/s bandwidth. The Xeon supports both DDR4 and DDR5, also dual-channel, but no bandwidth figure is listed. The Xeon supports ECC memory; the 366H does not. PCIe lanes favor the Xeon: Gen 5 with 16 lanes (CPU only) versus Gen 5 with 12 lanes for the 366H. The 366H has integrated Intel Xe3 Graphics; the Xeon has no integrated graphics. The 366H uses an Intel BGA 2540 socket, while the Xeon uses Intel Socket 1700.

The 366H is a mobile part with a release date of January 2026, while the Xeon is a server/workstation part released in February 2025. Both are currently active in production. The Xeon’s die size is listed as 257 mm²; no die size is given for the 366H.

Head-to-Head Benchmarks

The Core Ultra 7 366H wins all six Cinebench tests by a uniform 8.9%. In R15 multicore, it scores 2870 against 2635; in R15 single-core, 405 against 372. R20 multicore shows 11960 vs 10980, and R20 single-core 1688 vs 1550. R23 multicore is 28477 vs 26145, and R23 single-core 4020 vs 3691. This consistent delta suggests a per-clock IPC advantage for the 366H, despite the Xeon’s higher boost clock.

The largest single win for the 366H is in Passmark find prime numbers, where it scores 326 against 149 – a 118.8% advantage. This indicates a massive lead in integer-heavy, latency-sensitive workloads that benefit from the 366H’s core count. Data encryption also favors the 366H heavily: 25845 vs 18324, a 41% lead. Floating-point math shows a 39.2% win (103615 vs 74460), and physics follows with a 24.9% edge (2880 vs 2305). Extended instructions go to the 366H at 26901 vs 24490 (9.8% up), and random string sorting at 39814 vs 35495 (12.2% up). The multithread score is 33429 vs 30759, an 8.7% win for the 366H.

The Xeon 6357P’s wins are fewer but notable. Its biggest is integer math: 97375 vs 83695, a 14% lead. Data compression follows at 353521 vs 327455, a 7.4% advantage. In single-thread Passmark, the Xeon wins 4233 vs 4043, a 4.5% edge. That single-thread win is consistent with its 5.40 GHz boost clock, which is 0.60 GHz higher than the 366H’s 4.80 GHz.

The pattern is clear: the 366H wins all multi-threaded and most throughput tests, while the Xeon wins in specific integer and compression tasks where its higher clock and larger L3 cache dominate. The 366H’s 13 wins versus the Xeon’s 4 wins are not close, but the Xeon’s victories are in workloads that many server applications rely on daily.

FAQ

Q: Which CPU is faster in Cinebench R23 multi-core?

A: The Intel Core Ultra 7 366H scores 28477 compared to the Xeon 6357P’s 26145, a 8.9% advantage.

Q: Does the Intel Xeon 6357P support ECC memory?

A: Yes, the Xeon 6357P supports ECC memory. The Core Ultra 7 366H does not support ECC.

Q: Which processor has a higher boost clock?

A: The Intel Xeon 6357P has a boost clock of 5.40 GHz, while the Core Ultra 7 366H boosts to 4.80 GHz.

Q: How much faster is the Core Ultra 7 366H in data encryption?

A: The 366H scores 25845 in Passmark data encryption versus 18324 for the Xeon, a 41% lead.

Q: What is the process node for each chip?

A: The Core Ultra 7 366H is built on a 3 nm process, while the Xeon 6357P uses a 10 nm process.

Q: Which CPU has more cores?

A: The Core Ultra 7 366H has 16 cores, while the Xeon 6357P has 8 cores. Both have 16 threads.

Where Each One Wins

The Core Ultra 7 366H wins in all rendering and synthetic multi-threaded workloads. Cinebench R15, R20, and R23 multicore scores are all 8.9% higher, making it the clear choice for 3D rendering, video encoding, and any software that scales with physical cores. It also wins Passmark multithread (33429 vs 30759) by 8.7%. The 366H is the pick for floating-point math (103615 vs 74460, up 39.2%), which benefits scientific computing and physics simulations. Its 41% lead in data encryption (25845 vs 18324) makes it superior for security-related workloads. The 118.8% win in find prime numbers (326 vs 149) suggests a strong advantage in integer-heavy single-threaded calculations that are not clock-bound.

The Xeon 6357P wins in three specific Passmark sub-tests. Integer math is its strongest showing: 97375 vs 83695, a 14% lead, which indicates better performance in general-purpose arithmetic that does not rely on floating-point units. Data compression is another win at 353521 vs 327455 (7.4% higher), likely aided by its larger 24 MB L3 cache. The Xeon also takes Passmark single-thread (4233 vs 4043, 4.5% higher), which benefits applications with poor multi-threading that depend on maximum clock speed. Additionally, the Xeon’s 16 PCIe Gen 5 lanes (versus 12) and ECC support make it the only choice for memory-critical server roles.

The 366H’s integrated Xe3 Graphics gives it an edge for systems that need display output without a discrete GPU, whereas the Xeon requires a separate graphics card. The 366H’s 25 W TDP versus the Xeon’s 80 W TDP makes it suitable for thin-and-light laptops, while the Xeon is confined to desktop or rack-mounted platforms. For a mobile workstation, the 366H is the only viable option. For a headless server prioritizing integer throughput and data compression with ECC, the Xeon 6357P is the data-backed choice.