Intel Core Ultra 9 285K vs Intel Xeon w7-2575X Comparison

The Intel Xeon w7-2575X and Intel Core Ultra 9 285K represent two fundamentally different Intel platforms aimed at distinct workloads, yet their benchmark overlap is substantial. The Xeon w7-2575X is a Sapphire Rapids-based workstation processor with 22 cores and 44 threads, while the Core Ultra 9 285K is an Arrow Lake desktop chip with 24 cores and 24 threads. The benchmark data shows a clear split: the Core Ultra 9 dominates in most multi-threaded and single-threaded tests, while the Xeon takes narrow but decisive wins in specific integer and legacy rendering workloads. The Xeon w7-2575X holds a 96th percentile ranking among all CPUs, as does the Core Ultra 9 285K, placing both at the top tier of the database. However, their average benchmark scores differ notably, with the Xeon at 88172 and the Core Ultra 9 at 83807, a gap that reflects the Xeon's stronger aggregate performance across the full test suite.

Head-to-Head Benchmarks

The Core Ultra 9 285K wins 12 of the 17 head-to-head comparisons, and several of these victories are substantial. In Cinebench R15 multi-core, the Core Ultra 9 scores 6494 against the Xeon's 4463, a 31.3% advantage. The gap narrows in Cinebench R20 multi-core, where the Core Ultra 9 leads with 24003 versus 18596, a 22.5% delta. Curiously, the Xeon fights back in Cinebench R23 multi-core, scoring 44277 against the Core Ultra 9's 42522, a 4.1% win for the Xeon. This inconsistency across Cinebench versions suggests the Xeon's 44 threads scale better in the R23 workload, while the Core Ultra 9's higher clock speeds and newer architecture win in R15 and R20.

Single-core results are bizarre and favor the Xeon decisively. In Cinebench R15 single-core, the Xeon scores 630 against the Core Ultra 9's 359, a 75.5% lead. The Xeon repeats this in Cinebench R23 single-core with 6250 versus 2377, a staggering 162.9% advantage. However, the Core Ultra 9 wins Cinebench R20 single-core with 3388 versus 2625, a 22.5% delta. This reversal is unusual; the data suggests the Xeon's older architecture handles certain single-threaded Cinebench versions far better, while the Core Ultra 9's Arrow Lake design excels in others. Passmark single-thread results show the Core Ultra 9 ahead with 5087 versus 3300, a 35.1% margin, indicating the Core Ultra 9 is generally faster per core in synthetic tests.

In Passmark multi-thread, the Core Ultra 9 leads with 67260 versus 52091, a 22.6% advantage. The Core Ultra 9 also dominates in floating-point math, scoring 224324 against 171427, a 23.6% win. Integer math flips to the Xeon, which scores 219924 versus 172379, a 27.6% margin. Data compression is essentially tied, with the Core Ultra 9 at 790052 and the Xeon at 789817, a 0% delta. Data encryption heavily favors the Core Ultra 9, which scores 57745 versus 39295, a 32% advantage. Prime number finding is another Core Ultra 9 win, with 541 versus 218, a 59.7% margin. Physics simulation goes to the Core Ultra 9 at 3938 versus 2222, a 43.6% lead. Random string sorting favors the Core Ultra 9 at 94927 versus 77986, a 17.8% edge. Extended instructions are nearly identical, with the Xeon at 62498 and the Core Ultra 9 at 62277, a 0.4% Xeon win.

Architecture Differences

The two processors are built on different process nodes and foundries. The Xeon w7-2575X uses Intel's 10 nm process at Intel foundries, while the Core Ultra 9 285K uses TSMC's 3 nm process. This node advantage likely explains the Core Ultra 9's higher boost clock of 5.70 GHz versus the Xeon's 4.80 GHz. The Core Ultra 9 also has a higher base clock at 3.70 GHz versus 3.00 GHz. Core counts differ: the Xeon has 22 cores and 44 threads, while the Core Ultra 9 has 24 cores and 24 threads, meaning the Xeon relies on Hyper-Threading for its thread advantage. The Core Ultra 9's Arrow Lake architecture uses a hybrid design, though the fact pack does not specify P-core/E-core counts. The Xeon's Sapphire Rapids architecture is a server/workstation design with a 250 W TDP, while the Core Ultra 9 has a 125 W TDP, making it far more power-efficient on paper.

Cache hierarchies diverge significantly. The Xeon has 80 KB of L1 per core, 2 MB of L2 per core, and 45 MB of L3 cache. The Core Ultra 9 has 192 KB of L1 per core, 3 MB of L2 per core, and 36 MB of shared L3. The Xeon's larger L3 (45 MB vs 36 MB) may help in large working sets, but the Core Ultra 9's larger per-core L1 and L2 caches benefit single-threaded performance. Memory support is DDR5 for both, but the Xeon uses quad-channel memory with 153.6 GB/s bandwidth, while the Core Ultra 9 is dual-channel with 102.4 GB/s. Both support ECC memory. PCIe lanes differ drastically: the Xeon offers 64 Gen 5 lanes (CPU only), while the Core Ultra 9 provides 20 Gen 5 lanes. The Xeon has no integrated graphics, while the Core Ultra 9 includes Arc Xe-LPG Graphics 64EU. The Xeon is on Intel Socket 4677, while the Core Ultra 9 uses Intel Socket 1851. Both have unlocked multipliers. The Xeon's launch MSRP is $1689, while the Core Ultra 9's is $589.

The Verdict

The data points to the Core Ultra 9 285K as the faster processor for most workloads, particularly those involving floating-point math, encryption, physics, and general multi-threading. Its 22.6% lead in Passmark multi-thread and 23.6% lead in floating-point math are decisive. The Core Ultra 9 also wins in Passmark single-thread by 35.1%, indicating better per-core performance for everyday tasks. The Xeon w7-2575X, however, holds specific advantages in Cinebench R23 multi-core (4.1% win), integer math (27.6% win), and Cinebench R23 single-core (162.9% win). The Xeon also has a higher average benchmark score of 88172 versus 83807, suggesting that across the full database, the Xeon edges out the Core Ultra 9 in aggregate performance. This is likely due to the Xeon's massive thread count and larger memory bandwidth, which help in sustained server-style workloads. For a desktop user or workstation focused on rendering, the Core Ultra 9's wins in Cinebench R15 and R20 multi-core are compelling. For integer-heavy or legacy Cinebench R23 workloads, the Xeon is preferable. The Xeon's 64 PCIe lanes and quad-channel memory make it the choice for high-bandwidth I/O and multi-GPU setups, though the Core Ultra 9's integrated graphics and lower TDP (125 W vs 250 W) make it more accessible for standard desktop builds.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Xeon w7-2575X has 22 cores and 44 threads, while the Intel Core Ultra 9 285K has 24 cores and 24 threads. The Xeon uses Hyper-Threading to double its thread count.

Q: What is the single-thread performance difference?

A: In Passmark single-thread, the Core Ultra 9 scores 5087 versus the Xeon's 3300, a 35.1% advantage. However, in Cinebench R23 single-core, the Xeon wins with 6250 versus 2377, a 162.9% lead, showing workload-dependent results.

Q: Which processor has faster memory bandwidth?

A: The Xeon w7-2575X offers quad-channel memory with 153.6 GB/s bandwidth, while the Core Ultra 9 285K uses dual-channel memory with 102.4 GB/s bandwidth. Both support DDR5 and ECC.

Q: How do they compare in multi-threaded rendering?

A: The Core Ultra 9 wins Cinebench R15 multi-core by 31.3% and Cinebench R20 multi-core by 22.5%, but the Xeon wins Cinebench R23 multi-core by 4.1%. In Passmark multi-thread, the Core Ultra 9 leads by 22.6%.

Q: What are the process node differences?

A: The Xeon w7-2575X uses Intel's 10 nm process at Intel foundries, while the Core Ultra 9 285K uses TSMC's 3 nm process. The Core Ultra 9's smaller node likely contributes to its higher boost clock of 5.70 GHz.

Q: Which processor has better PCIe connectivity?

A: The Xeon w7-2575X has 64 Gen 5 lanes (CPU only), while the Core Ultra 9 285K has 20 Gen 5 lanes. This makes the Xeon far more suitable for multi-GPU or high-speed storage configurations.

Where Each One Wins

The Intel Core Ultra 9 285K is the clear winner in most general-purpose and workstation benchmarks. It dominates in Passmark multi-thread (67260 vs 52091), floating-point math (224324 vs 171427), data encryption (57745 vs 39295), and physics (3938 vs 2222). It also wins in prime number finding (541 vs 218) and random string sorting (94927 vs 77986), indicating strengths in algorithmic and data-processing tasks. The Core Ultra 9's Passmark single-thread score of 5087 versus 3300 makes it the better choice for interactive applications and lightly threaded software. Its higher boost clock of 5.70 GHz and TSMC 3 nm node suggest superior per-core efficiency, and its integrated Arc Xe-LPG Graphics 64EU provides a built-in display output, which the Xeon lacks.

The Intel Xeon w7-2575X wins in specific, often integer-heavy or legacy workloads. Its Cinebench R23 multi-core victory (44277 vs 42522) and massive Cinebench R23 single-core lead (6250 vs 2377) are notable. The Xeon's integer math score of 219924 versus 172379 shows a 27.6% edge, making it better for integer-intensive computations. Extended instructions are nearly equal, with the Xeon ahead by 0.4%. The Xeon's higher average benchmark score of 88172 versus 83807 indicates that across all tested benchmarks, the Xeon performs better on aggregate. This is likely due to its 44 threads, quad-channel memory with 153.6 GB/s bandwidth, and larger 45 MB L3 cache. The Xeon's 64 PCIe Gen 5 lanes make it the superior platform for high-bandwidth I/O, such as multiple GPUs or NVMe storage arrays. For users running Cinebench R23 or integer-heavy server workloads, the Xeon w7-2575X is the data-backed pick.