Intel Core Ultra 7 255H vs Intel Xeon 6353P Comparison

The Intel Xeon 6353P and Intel Core Ultra 7 255H occupy opposite ends of the Intel lineup, yet their benchmark averages land surprisingly close. The Xeon 6353P, a server/workstation part on the Raptor Lake architecture, posts a average benchmark score of 33844, while the mobile-focused Core Ultra 7 255H, built on Arrow Lake, scores 33537. Both sit in the low-80s percentile of all CPUs, with the Xeon at 84 and the Ultra 7 at 83. The data reveals a split personality: the Xeon dominates rendering workloads, while the Ultra 7 sweeps nearly every Passmark subtest.

Head-to-Head Benchmarks

The Xeon 6353P’s most decisive victory comes in Cinebench R23 multicore, where it scores 22058 against the Ultra 7’s 9240. That is a 138.7% lead, the largest delta in the entire head-to-head set. The margin is so wide that it dwarfs the Xeon’s other wins. In Cinebench R20 multicore, the Xeon produces 9264 points versus 6381, a 45.2% advantage. Single-core results follow the same pattern, with the Xeon leading Cinebench R15 single-core 313 to 251 (24.7% ahead) and Cinebench R20 single-core 1307 to 900 (also 45.2% ahead). Cinebench R23 single-core gives the Xeon a 69% lead, scoring 3114 against the Ultra 7’s 1843.

The Xeon also wins in Passmark integer math, posting 86836 versus 77975, an 11.4% edge. That brings its total to 7 wins across the 17 benchmark comparisons. But the Ultra 7 takes the remaining 10, often by substantial margins. The biggest reversal is in Passmark find prime numbers, where the Ultra 7 scores 303 against the Xeon’s 127 — a 58.1% difference. Floating point math shows a 35.7% lead for the Ultra 7 (98796 vs 63509), and data encryption favors the Ultra 7 by 34.9% (23395 vs 15228). Extended instructions give the Ultra 7 a 22.9% edge (23755 vs 18311).

Passmark multithread is another clear Ultra 7 win: 30703 versus 25951, a 15.5% gap. Physics follows at 18.1% (2254 vs 1845), and random string sorting is 13.4% better (36058 vs 31226). Data compression is close, with the Ultra 7 ahead 298850 to 285581, just 4.4%. The narrowest margin is Passmark single-thread, where the Ultra 7 wins 4317 to 4226, a 2.1% difference. The Xeon’s Cinebench dominance is offset by the Ultra 7’s breadth in Passmark, making the overall average nearly a tie.

FAQ

Q: Which processor has the higher average benchmark score?

A: The Intel Xeon 6353P has a slightly higher average benchmark score of 33844 compared to the Intel Core Ultra 7 255H’s 33537, a difference of roughly 0.9%. The Xeon also edges out the Ultra 7 in percentile ranking, sitting at 84 versus 83 for all CPUs.

Q: How large is the Xeon’s lead in multi-core rendering?

A: In Cinebench R23 multicore, the Xeon 6353P scores 22058 against the Ultra 7’s 9240, a 138.7% advantage. The R20 multicore test shows a 45.2% lead (9264 vs 6381), and R15 multicore gives the Xeon a 46.7% edge (2223 vs 1515).

Q: Where does the Core Ultra 7 255H perform best relative to the Xeon?

A: The Ultra 7 wins 10 of the 17 head-to-head benchmarks. Its strongest results are in Passmark find prime numbers, where it leads by 58.1%, and floating point math, where it is 35.7% ahead. It also wins data encryption, extended instructions, multithread, physics, and random string sorting.

Q: Are the single-thread scores similar between the two?

A: The Passmark single-thread scores are close: 4317 for the Ultra 7 versus 4226 for the Xeon, a 2.1% difference. However, Cinebench single-core tests show a larger gap, with the Xeon leading R20 single-core by 45.2% and R23 single-core by 69%.

Q: What is the TDP difference?

A: The Xeon 6353P has a 65W TDP, while the Core Ultra 7 255H is rated at 28W. This makes the Ultra 7 a lower-power part, consistent with its mobile market segment, despite having twice the core count.

Q: Which processor has a higher memory bandwidth rating?

A: The Core Ultra 7 255H lists a memory bandwidth of 102.4 GB/s. The Xeon 6353P does not have a memory bandwidth figure listed in the data, though it supports DDR4 and DDR5 memory.

Architecture Differences

The two processors are built on fundamentally different architectures. The Xeon 6353P uses Raptor Lake, specifically the Raptor Lake-R codename, and is part of the Xeon 6 generation (Raptor Lake Refresh). It is fabricated on Intel’s 10 nm process node with a die size of 257 mm². The Core Ultra 7 255H, meanwhile, uses Arrow Lake with the Arrow Lake-H codename, part of the Ultra 7 generation. It is built on a 3 nm process node by TSMC, and no die size is listed.

Core counts differ sharply. The Xeon has 8 cores and 16 threads, while the Ultra 7 has 16 cores and 16 threads. This means the Xeon relies on Hyper-Threading to reach 16 threads, whereas the Ultra 7 has one thread per core. Cache layouts also differ: the Xeon provides 80 KB of L1 per core and 2 MB of L2 per core, while the Ultra 7 offers 192 KB of L1 per core and 3 MB of L2 per core. Both share 24 MB of L3 cache. The process node difference is significant — 10 nm for Intel versus 3 nm for TSMC — which likely contributes to the Ultra 7’s efficiency advantage.

Memory support diverges as well. The Xeon supports DDR4 and DDR5, while the Ultra 7 supports DDR5 and LPDDR5X. Both have dual-channel memory buses and ECC memory support. Integrated graphics are absent on the Xeon (N/A), but the Ultra 7 includes Arc Graphics 140T. PCIe lanes also differ: the Xeon provides 16 Gen 5 lanes (CPU only), while the Ultra 7 offers 20 Gen 5 lanes (CPU only). The Xeon is a server/workstation part, whereas the Ultra 7 targets mobile devices.

Specification Differences

The most obvious spec gap is core and thread count. The Xeon 6353P has 8 cores and 16 threads; the Core Ultra 7 255H has 16 cores and 16 threads. Base clocks differ, with the Xeon at 2.70 GHz and the Ultra 7 at 2.00 GHz. Boost clocks are closer: 5.40 GHz for the Xeon versus 5.10 GHz for the Ultra 7. TDP is a major differentiator — the Xeon runs at 65W, the Ultra 7 at 28W.

Sockets are incompatible: the Xeon uses Intel Socket 1700, while the Ultra 7 uses Intel BGA 2049. Process node and foundry differ, with the Xeon on Intel’s 10 nm and the Ultra 7 on TSMC’s 3 nm. Memory support is another split: DDR4/DDR5 for the Xeon versus DDR5/LPDDR5X for the Ultra 7. The Ultra 7 lists a memory bandwidth of 102.4 GB/s, while the Xeon has no figure. Integrated graphics are absent on the Xeon but present as Arc Graphics 140T on the Ultra 7. PCIe lanes differ (16 vs 20, both Gen 5). Release dates are close but distinct: the Xeon launched on 2025-02-23, while the Ultra 7 launched earlier on 2025-01-12. The Xeon has a launch MSRP of $426; the Ultra 7 has no listed MSRP. Die size is only given for the Xeon (257 mm²).

Where Each One Wins

The Xeon 6353P is the clear choice for heavily threaded rendering workloads. Its Cinebench R23 multicore score of 22058 is more than double the Ultra 7’s 9240, and it holds similarly large leads in R15 and R20 multicore. Single-core Cinebench performance also favors the Xeon, making it stronger for latency-sensitive tasks that rely on one or two threads. The Xeon’s integer math win (86836 vs 77975) suggests an edge in general arithmetic-heavy integer operations. Its server/workstation market segment and 65W TDP position it for sustained all-core workloads, though the data does not include thermal or power measurements to confirm sustained performance.

The Core Ultra 7 255H wins in Passmark’s floating-point and encryption-heavy tests. Floating point math shows a 35.7% lead, and data encryption is 34.9% better. The prime number test, which stresses branch prediction and integer logic, gives the Ultra 7 a 58.1% advantage, indicating a different performance profile than the Xeon’s Cinebench dominance. Passmark multithread also favors the Ultra 7 (30703 vs 25951), despite the Xeon’s multicore Cinebench wins. The Ultra 7’s wins in physics, random string sorting, and extended instructions point to a more balanced general-purpose performer. Its 16 physical cores, 3 nm process, and 28W TDP make it a mobile-appropriate part that still leads in aggregate Passmark threading tests.

The data shows a split based on workload type. Cinebench — which stresses sustained multi-core and single-core rendering — belongs to the Xeon. Passmark’s diverse subtests, which include encryption, compression, and prime number generation, belong to the Ultra 7. For users choosing between the two, the Xeon 6353P suits rendering servers or workstation tasks with heavy Cinebench-style loads. The Core Ultra 7 255H fits mobile devices requiring low power (28W) with strong floating-point, encryption, and general multithread performance. The Ultra 7’s 16 cores and 3 nm process deliver a 15.5% multithread lead in Passmark, but the Xeon’s 8 cores and higher clock speeds (5.40 GHz boost) dominate Cinebench R23 multicore by 138.7%. Each processor wins where its architecture is strongest, and the average scores reflect that near-tie: 33844 versus 33537.