Intel Core Ultra 7 155U vs Intel Xeon 6325P Comparison

The Verdict

The benchmark data reveals a clear split in workload preferences. The Intel Core Ultra 7 155U wins 10 of the 17 head-to-head comparisons, while the Intel Xeon 6325P takes 7. The Ultra 7 155U dominates in encryption, integer math, and floating-point workloads, while the Xeon 6325P counters with superior single-thread performance and extended instruction handling.

For mobile users and those prioritizing encryption or math-heavy tasks, the Core Ultra 7 155U is the stronger choice. Its 21.7% lead in data encryption and 17.1% advantage in integer math make it particularly suited for security-related or general computational work. The Xeon 6325P, however, delivers a 20% higher single-thread score and a 29.5% edge in Cinebench R23 multicore, making it preferable for workloads that benefit from raw clock speed and sustained multi-core rendering.

The overall database percentile ranking places the Ultra 7 155U at the 75th percentile versus the Xeon 6325P at the 74th, indicating near-identical standing among all tested CPUs. The average benchmark scores tell a similar story: 21,174 for the Ultra 7 155U against 20,821 for the Xeon 6325P, a difference of only 1.7%. Neither processor is a decisive overall winner; the choice depends entirely on the specific workload.

The Xeon 6325P targets server and workstation environments with ECC memory support and PCIe Gen 5 connectivity. The Ultra 7 155U targets mobile platforms with integrated graphics and a 15 W TDP. The data suggests that buyers should select based on platform requirements first and benchmark priorities second.

FAQ

Q: Which processor has the higher single-core score in Cinebench R23?

A: The Intel Xeon 6325P scores 1,936 in Cinebench R23 single-core, which is 13.9% higher than the Core Ultra 7 155U's 1,666.

Q: How do the two processors compare in multi-threaded PassMark performance?

A: The Core Ultra 7 155U scores 16,382 in PassMark multithread, a 1.5% advantage over the Xeon 6325P's 16,138. The difference is marginal in this test.

Q: Does the Xeon 6325P support ECC memory?

A: Yes, the Xeon 6325P supports ECC memory. The Core Ultra 7 155U does not support ECC memory.

Q: Which processor has integrated graphics?

A: The Core Ultra 7 155U includes Arc Xe-LPG 64EU integrated graphics, while the Xeon 6325P has no integrated graphics (N/A).

Q: What is the difference in Cinebench R20 multicore scores?

A: The scores are nearly identical: 5,765 for the Core Ultra 7 155U and 5,761 for the Xeon 6325P, a difference of just 0.1%.

Q: Which processor has the higher boost clock?

A: The Xeon 6325P has a boost clock of 5.20 GHz, compared to the Core Ultra 7 155U's 4.80 GHz.

Architecture Differences

The two processors come from different Intel architecture families. The Core Ultra 7 155U uses Meteor Lake, built on a 7 nm process node. The Xeon 6325P uses Raptor Lake, specifically the Raptor Lake-R variant, built on a 10 nm process node. Both are manufactured by Intel.

The core configurations differ substantially. The Ultra 7 155U packs 12 cores and 14 threads, while the Xeon 6325P has only 4 cores and 8 threads. This core count disparity explains some benchmark patterns: the Ultra 7 155U tends to win in parallel workloads that scale with core count, while the Xeon 6325P leverages its higher clock speeds in single-threaded tests.

Cache hierarchies also differ. The Ultra 7 155U has 112 KB of L1 cache per core and 2 MB of L2 cache per core. The Xeon 6325P has 80 KB of L1 per core and 1.25 MB of L2 per core. Both share 12 MB of L3 cache. The smaller per-core caches on the Xeon 6325P are offset by its higher base clock of 3.50 GHz versus 1.70 GHz on the Ultra 7 155U.

Memory support diverges significantly. The Xeon 6325P supports both DDR4 and DDR5 with ECC memory, reflecting its server/workstation positioning. The Ultra 7 155U supports DDR5 with memory depending on the motherboard, and has a recorded memory bandwidth of 89.6 GB/s. The Xeon 6325P has no recorded memory bandwidth figure.

PCIe capabilities differ as well. The Xeon 6325P offers PCIe Gen 5 with 16 lanes (CPU only), while the Ultra 7 155U provides PCIe Gen 4 with 12 lanes (CPU only). The Xeon 6325P also has a larger die size at 163 mm², while the Ultra 7 155U has no recorded die size.

Specification Differences

The Core Ultra 7 155U and Xeon 6325P differ across nearly every major specification category. Core count: 12 versus 4. Thread count: 14 versus 8. Base clock: 1.70 GHz versus 3.50 GHz. Boost clock: 4.80 GHz versus 5.20 GHz. Thermal design power: 15 W versus 55 W. These are fundamental differences that shape all performance outcomes.

The sockets differ entirely: Intel BGA 2049 for the Ultra 7 155U versus Intel Socket 1700 for the Xeon 6325P. The market segments are also distinct: Mobile for the Ultra 7 155U, Server/Workstation for the Xeon 6325P.

Release dates show a generation gap. The Ultra 7 155U launched on December 13, 2023, while the Xeon 6325P launched on February 23, 2025. The launch MSRP for the Ultra 7 155U is $490, and for the Xeon 6325P it is $281.

Cache specifications differ in L1 and L2 sizes per core, as detailed above. The L3 cache is identical at 12 MB shared. Memory channels are both dual-channel, but ECC support is exclusive to the Xeon 6325P. Integrated graphics are exclusive to the Ultra 7 155U.

The Ultra 7 155U belongs to the Core Ultra Series 1 generation, while the Xeon 6325P is part of the Xeon 6 (Raptor Lake Refresh) generation. Both processors are locked (multiplier not unlocked) and have active production status. Part numbers are SRN6B for the Ultra 7 155U and SRPLX for the Xeon 6325P.

Head-to-Head Benchmarks

The most striking result is in Cinebench R23 multicore, where the Xeon 6325P scores 13,717 versus 9,674.5 for the Ultra 7 155U, a 29.5% advantage. This is the largest single win for either processor. The Xeon 6325P also wins Cinebench R23 single-core by 13.9% (1,936 versus 1,666).

PassMark single-thread performance follows the same pattern. The Xeon 6325P scores 4,213 in both single-thread tests, 20% ahead of the Ultra 7 155U's 3,372. Extended instructions also favor the Xeon 6325P: 11,645 versus 9,903, a 15% margin.

The Ultra 7 155U counters with a dominant 21.7% win in PassMark data encryption (11,333 versus 9,311). Integer math shows a 17.1% advantage for the Ultra 7 155U (57,564 versus 49,151). Floating-point math goes to the Ultra 7 155U by 8% (40,256 versus 37,265).

Cinebench R15 results favor the Ultra 7 155U: 1,585 versus 1,382 in multicore (14.7%) and 238.5 versus 195 in single-core (22.3%). Cinebench R20 results are essentially tied: 5,765 versus 5,761 in multicore (0.1%) and exactly 813 in single-core (0% difference).

PassMark physics goes to the Ultra 7 155U by 6.3% (1,084 versus 1,020). Random string sorting favors the Ultra 7 155U by 3.4% (19,767 versus 19,113). Data compression is nearly identical, with the Xeon 6325P winning by 0.5% (178,020 versus 177,122). Find prime numbers is a virtual tie: 66 versus 65, a 1.5% edge for the Xeon 6325P.

Where Each One Wins

The Core Ultra 7 155U wins in security-related tasks. Its 21.7% lead in data encryption makes it the clear choice for encryption-heavy workloads. It also excels in integer math with a 17.1% advantage, suggesting strength in general computational tasks that rely on integer operations. Floating-point math shows an 8% edge, indicating solid performance in scientific or simulation workloads that use floating-point calculations.

The Ultra 7 155U also wins in older Cinebench versions. Its 14.7% advantage in Cinebench R15 multicore and 22.3% in R15 single-core indicate that legacy benchmark scenarios favor its architecture. The 6.3% win in PassMark physics and 3.4% in random string sorting round out its portfolio.

The Xeon 6325P wins in rendering and single-thread performance. The 29.5% lead in Cinebench R23 multicore is its most significant victory, suggesting superior sustained multi-core rendering capability despite having fewer cores. The 13.9% single-core advantage in R23 and 20% in PassMark single-thread indicate faster per-thread execution.

Extended instructions favor the Xeon 6325P by 15%, pointing to strength in specialized instruction sets like AVX or similar extensions. Data compression is essentially a tie at 0.5%, so neither processor has a meaningful edge there. Prime number finding is also a tie, with the Xeon 6325P ahead by just 1.5%.

The use case split is clear: choose the Ultra 7 155U for mobile platforms, encryption, integer math, and legacy benchmark workloads. Choose the Xeon 6325P for server/workstation platforms, ECC memory requirements, rendering workloads, and applications that depend on high single-thread clock speeds. The overall benchmark averages are nearly identical, so the decision should rest on specific workload priorities and platform constraints.