Intel Core Ultra 5 235HX vs Intel Xeon 634 Comparison

The Intel Xeon 634 and Intel Core Ultra 5 235HX are both high-performance Intel parts, but they are built for entirely different worlds. The Xeon 634 is a server/workstation processor with a 150 TDP and a massive 48 MB of shared L3 cache, while the Core Ultra 5 235HX is a mobile chip with a 55 TDP and 24 MB of L3 cache. The benchmark data shows a clear split: the Xeon dominates in data compression, integer math, and extended instructions, while the Core Ultra wins in nearly every other test, including all Cinebench scores and most PassMark workloads. The average benchmark scores are close—52,974 for the Xeon versus 52,073 for the Core Ultra—but the workload characteristics are very different.

FAQ

Q: Which processor has the higher average benchmark score?

A: The Intel Xeon 634 has a higher average benchmark score of 52,974, compared to the Intel Core Ultra 5 235HX's 52,073. This is a difference of roughly 1.7%, putting both in the 91st percentile of all CPUs.

Q: How does the Core Ultra 5 235HX perform in single-threaded workloads?

A: The Core Ultra 5 235HX is significantly stronger in single-threaded tests. It scores 4,683 in PassMark single-thread, which is 23.8% higher than the Xeon 634's 3,567. In Cinebench R23 single-core, it scores 4,903 versus the Xeon's 4,510, an 8% advantage.

Q: Where does the Intel Xeon 634 win?

A: The Xeon 634 wins in three specific areas: PassMark data compression (477,924 vs 426,417, a 12.1% lead), PassMark integer math (117,664 vs 97,177, a 21.1% lead), and PassMark extended instructions (38,320 vs 34,808, a 10.1% lead).

Q: What are the core and thread counts for each processor?

A: The Intel Xeon 634 has 12 cores and 24 threads, while the Intel Core Ultra 5 235HX has 14 cores and 14 threads. The Core Ultra has more physical cores but does not support hyper-threading, giving it fewer total threads.

Q: Do both processors support DDR5 memory?

A: Yes, both support DDR5. However, the Xeon 634 uses a quad-channel memory bus with a bandwidth of 204.8 GB/s, while the Core Ultra 5 235HX uses a dual-channel bus with a bandwidth of 102.4 GB/s.

Q: Which processor has a higher boost clock?

A: The Intel Core Ultra 5 235HX has a higher boost clock of 5.10 GHz, compared to the Intel Xeon 634's boost clock of 4.60 GHz. The Core Ultra also has a higher base clock at 2.90 GHz versus 2.70 GHz.

Architecture Differences

The architectural gap between these two chips is substantial. The Intel Xeon 634 is built on Granite Rapids architecture using a 5 nm process node from Intel, while the Core Ultra 5 235HX uses Arrow Lake architecture on a 3 nm node from TSMC. The Xeon is a server-class part on the Intel Socket 4710, whereas the Core Ultra is a mobile chip on Intel BGA 2114.

The Xeon 634 packs 12 cores with 24 threads, relying on hyper-threading to double its thread count. Its cache hierarchy is large: 112 KB of L1 per core, 2 MB of L2 per core, and a shared 48 MB of L3 cache. This is paired with quad-channel DDR5 memory delivering 204.8 GB/s of bandwidth and 80 PCIe Gen 5 lanes. It is designed for heavy data movement and server workloads, with ECC memory support and no integrated graphics.

The Core Ultra 5 235HX takes a different approach. It has 14 cores and 14 threads, meaning no hyper-threading. It uses a smaller 3 nm process and has a die size of 243 mm² with 17,800 million transistors, while the Xeon's die is larger at 598 mm². The Core Ultra has 192 KB of L1 per core and 3 MB of L2 per core, but its shared L3 is halved at 24 MB. Memory bandwidth is also halved at 102.4 GB/s over dual-channel DDR5, and PCIe lanes drop to 20 Gen 5 lanes. It includes integrated Arc Xe-LPG Graphics with 48 EUs, a feature the Xeon lacks entirely. The Core Ultra's TDP is just 55 watts versus the Xeon's 150 watts, reflecting its mobile focus.

Head-to-Head Benchmarks

The benchmark results show a lopsided overall win count, with the Core Ultra 5 235HX taking 14 of 17 tests. The Xeon 634 wins only 3 tests, but they are meaningful ones. In Cinebench R23 multicore, the Core Ultra scores 34,731 versus the Xeon's 31,950, a delta of -8% for the Xeon. The same 8% margin appears in Cinebench R20 multicore (14,587 vs 13,419) and Cinebench R15 multicore (3,500 vs 3,220). Single-core Cinebench results are similar: the Core Ultra wins R23 single-core 4,903 to 4,510, R20 single-core 2,059 to 1,894, and R15 single-core 494 to 454, all with roughly an 8% delta.

The Core Ultra's largest wins come in specific PassMark tests. It crushes the Xeon in find prime numbers, scoring 361 versus 196, a 45.7% lead. Floating point math is another big win: 129,819 versus 93,564, a 27.9% margin. Data encryption also favors the Core Ultra at 32,697 versus 23,451, a 28.3% advantage. PassMark multithread goes to the Core Ultra at 40,849 versus 37,589, an 8% lead, and physics follows at 2,550 versus 2,250, an 11.8% lead.

The Xeon 634's wins are concentrated in data-intensive tasks. Its biggest margin is in integer math, where it scores 117,664 versus 97,177, a 21.1% lead. Data compression is also a strong suit: 477,924 versus 426,417, a 12.1% advantage. Extended instructions go to the Xeon at 38,320 versus 34,808, a 10.1% lead. The Xeon also wins PassMark random string sorting? No, that goes to the Core Ultra at 50,929 versus 47,016, a 7.7% margin. The Xeon's only other win is in the two PassMark single-thread tests? No, those go to the Core Ultra at 4,683 versus 3,567, a 23.8% margin.

Specification Differences

The key specification differences are stark. The Xeon 634 has 12 cores and 24 threads, while the Core Ultra 5 235HX has 14 cores and 14 threads. Base clocks differ: 2.70 GHz for the Xeon versus 2.90 GHz for the Core Ultra. Boost clocks also differ: 4.60 GHz versus 5.10 GHz. TDP is a major split, with the Xeon at 150 watts and the Core Ultra at 55 watts.

The process nodes are different: the Xeon uses Intel's 5 nm process, while the Core Ultra uses TSMC's 3 nm process. The die sizes reflect this: 598 mm² for the Xeon versus 243 mm² for the Core Ultra. The Core Ultra has a listed transistor count of 17,800 million, while the Xeon's is not specified. Cache configurations differ across the board: L1 is 112 KB per core for the Xeon versus 192 KB per core for the Core Ultra; L2 is 2 MB per core versus 3 MB per core; and L3 is 48 MB shared versus 24 MB shared.

Memory support is DDR5 for both, but the Xeon uses a quad-channel bus with 204.8 GB/s bandwidth and supports ECC memory, while the Core Ultra uses a dual-channel bus with 102.4 GB/s bandwidth and no ECC support. PCIe lanes are 80 Gen 5 for the Xeon versus 20 Gen 5 for the Core Ultra. The Xeon has no integrated graphics, while the Core Ultra includes Arc Xe-LPG Graphics with 48 EUs. The Xeon has a launch MSRP of $499; the Core Ultra has no listed launch MSRP. Both have unlocked multipliers. The Xeon was released on 2026-02-01, while the Core Ultra was released on 2025-01-12.

The Verdict

The data supports a clear split based on use case. The Intel Core Ultra 5 235HX is the better all-around performer for general and single-threaded workloads. It wins every Cinebench test by about 8%, and its PassMark single-thread score is 23.8% higher. It also dominates in encryption, floating point math, and find prime numbers, with margins between 27.9% and 45.7%. For anyone running typical desktop or mobile applications, this is the faster chip.

The Intel Xeon 634 is the specialist. Its wins in data compression, integer math, and extended instructions—by 12.1%, 21.1%, and 10.1% respectively—point to strength in specific server and workstation tasks. The 48 MB of L3 cache and quad-channel memory bandwidth of 204.8 GB/s reinforce this, as does the 80-lane PCIe Gen 5 support. It also has ECC memory support, which is absent on the Core Ultra. The Xeon's higher TDP of 150 watts is a trade-off for that capability.

The Core Ultra 5 235HX scores 52,073 on average, sitting just below the Xeon's 52,974, but it achieves this with a fraction of the power draw. Its nearest rivals include the AMD EPYC 8124P and AMD Ryzen 9 5950X, with scores of 52,121 and 51,947 respectively, showing it competes at a high level. The Xeon's nearest rivals include the AMD Ryzen AI Embedded P164 and AMD Ryzen 5 9500F, which are within 0.2% of its score. Both chips sit in the 91st percentile of all CPUs.

Where Each One Wins

Choose the Intel Core Ultra 5 235HX for most workloads. It wins in all Cinebench R15, R20, and R23 tests, both single-core and multicore, by approximately 8%. It also wins PassMark multithread (40,849 vs 37,589), physics (2,550 vs 2,250), and random string sorting (50,929 vs 47,016). Its biggest advantages are in find prime numbers (45.7% ahead), floating point math (27.9% ahead), and data encryption (28.3% ahead). For mobile or power-conscious systems, its 55-watt TDP is a decisive factor.

Choose the Intel Xeon 634 for data-heavy server or workstation tasks. It wins PassMark data compression with a score of 477,924, which is 12.1% higher than the Core Ultra's 426,417. It also wins integer math at 117,664 versus 97,177, a 21.1% margin, and extended instructions at 38,320 versus 34,808, a 10.1% margin. The quad-channel memory bus and 80 PCIe Gen 5 lanes make it the choice for systems that move large amounts of data. ECC memory support is another point in its favor for reliability-focused builds. Its 150-watt TDP and larger die size reflect its workstation-class design, but the benchmark data shows where that power is being spent.