Intel Core Ultra 5 135H vs Intel Xeon Phi 7210 Comparison

The Intel Xeon Phi 7210 and Intel Core Ultra 5 135H represent two radically different approaches to processing, separated by nearly a decade of architectural evolution. The Xeon Phi 7210 is a 64-core Knights Landing monster from the server/workstation segment, while the Core Ultra 5 135H is a 14-core Meteor Lake mobile processor. Despite their differences, both CPUs land at the 81st percentile of all CPUs, with average benchmark scores of 29245 and 29093 respectively. This places them within 0.5% of each other overall, yet their performance profiles could not be more divergent. The data reveals a clear split: the Xeon Phi wins in raw data throughput and extended instruction workloads, while the Core Ultra 5 dominates nearly everything else, especially single-threaded and encryption tasks.

Where Each One Wins

The Xeon Phi 7210 is a specialist, not a generalist. Its wins are concentrated in three specific PassMark workloads: data compression (332960 vs 251651, a 32.3% lead), extended instructions (18359 vs 15028, a 22.2% lead), and integer math (84874 vs 73509, a 15.5% lead). These are the workloads that can exploit its 256 threads and massive parallel throughput. If a task involves compressing large datasets, executing AVX-512-style extended instruction sets, or processing integer-heavy algorithms that scale across many cores, the Xeon Phi is the clear choice. The data shows it wins 3 out of 17 head-to-head benchmarks.

The Core Ultra 5 135H is the all-rounder that wins everywhere else. It takes 14 of the 17 head-to-head benchmarks, including every Cinebench test, all single-threaded workloads, and critical system-level tasks. Its most dominant wins are in PassMark physics (1482 vs 198, an 86.6% lead), single-thread performance (3521 vs 460, an 86.9% lead), and prime number finding (89 vs 10, an 88.8% lead). For daily desktop use, gaming, content creation, or any workload that depends on responsive single-core performance, the Core Ultra 5 is overwhelmingly superior. The lesson is simple: pick the Xeon Phi for specialized compute farms, pick the Core Ultra 5 for everything else.

Architecture Differences

These two processors are built on fundamentally different philosophies. The Xeon Phi 7210 uses the Knights Landing architecture on a 14 nm process, packing 64 cores with 256 threads and 8,000 million transistors. Each core has 32 KB of L1 cache and 512 KB of L2 cache, with no L3 cache at all. It supports DDR4 memory with ECC, uses the Intel Socket 3647, and has a 215 W TDP. This is a many-core design where the sheer number of threads compensates for the low 1300 MHz base and 1500 MHz boost clocks.

The Core Ultra 5 135H uses the Meteor Lake architecture on a 7 nm process, a significant node advantage. It has 14 cores and 18 threads, with a much higher base clock of 3.60 GHz and boost clock of 4.60 GHz. Cache is configured differently: 112 KB of L1 per core, 2 MB of L2 per core, and critically, 18 MB of shared L3 cache. It supports DDR5 memory on a dual-channel bus with 89.6 GB/s bandwidth, lacks ECC support, and uses the Intel BGA 2049 socket. It also includes integrated Arc Xe-LPG 96EU graphics, PCIe Gen 5 with 8 CPU lanes, and has a much lower 28 W TDP. The Xeon Phi is a compute accelerator; the Core Ultra 5 is a complete mobile system on a chip.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Xeon Phi 7210 has 64 cores and 256 threads, compared to the Core Ultra 5 135H's 14 cores and 18 threads. The Xeon Phi has over four times the cores and over fourteen times the threads.

Q: Why does the Core Ultra 5 win so many benchmarks despite having fewer cores?

A: The Core Ultra 5 has much higher clock speeds (3.60 GHz base, 4.60 GHz boost vs 1.30 GHz base, 1.50 GHz boost) and a modern 7 nm architecture with 18 MB of shared L3 cache. The Xeon Phi's 14 nm Knights Landing design has no L3 cache and relies on massive thread counts, which only helps in specific parallel workloads.

Q: Which processor supports ECC memory?

A: Only the Intel Xeon Phi 7210 supports ECC memory. The Core Ultra 5 135H does not have ECC support, making the Xeon Phi more suitable for error-sensitive server applications.

Q: What are the memory type differences?

A: The Xeon Phi 7210 supports DDR4 memory, while the Core Ultra 5 135H supports DDR5 memory. The Core Ultra 5 also has a dual-channel memory bus with a specified bandwidth of 89.6 GB/s, whereas the Xeon Phi's memory bus and bandwidth are not specified in the data.

Q: What is the release date gap between these two?

A: The Xeon Phi 7210 was released on June 19, 2016, while the Core Ultra 5 135H was released on December 13, 2023. The Core Ultra 5 is over seven years newer.

Q: Does the Core Ultra 5 have integrated graphics?

A: Yes, the Core Ultra 5 135H includes integrated Arc Xe-LPG 96EU graphics. The Xeon Phi 7210 has no integrated graphics, which is typical for a server/workstation processor.

Specification Differences

The two processors differ in nearly every measurable specification. The Xeon Phi 7210 has 64 cores and 256 threads, while the Core Ultra 5 135H has 14 cores and 18 threads. Base clocks are 1300.00 MHz versus 3600.00 MHz, and boost clocks are 1500.00 MHz versus 4600.00 MHz. The TDP is drastically different: 215 W for the Xeon Phi versus 28 W for the Core Ultra 5. Sockets differ (Intel Socket 3647 vs Intel BGA 2049), as do architectures (Knights Landing vs Meteor Lake) and process nodes (14 nm vs 7 nm). The Xeon Phi has 8,000 million transistors, while the Core Ultra 5's transistor count is not specified.

Cache configurations are also distinct. The Xeon Phi provides 32 KB L1 and 512 KB L2 per core with no L3, while the Core Ultra 5 provides 112 KB L1, 2 MB L2 per core, and 18 MB of shared L3. Memory support differs (DDR4 vs DDR5), and only the Xeon Phi supports ECC. The Core Ultra 5 has a dual-channel memory bus with 89.6 GB/s bandwidth, PCIe Gen 5 with 8 CPU lanes, and integrated Arc Xe-LPG 96EU graphics; the Xeon Phi lacks PCIe and integrated graphics details. The Core Ultra 5 has a launch MSRP of $342, while the Xeon Phi has no listed MSRP. The production status is "Active" for the Core Ultra 5, while the Xeon Phi's status is not specified.

Head-to-Head Benchmarks

The most striking result is the Cinebench R23 multicore test, where the Core Ultra 5 scores 11875.5 against the Xeon Phi's 6210, a 47.7% lead. This is surprising given the Xeon Phi's 256 threads, but the Core Ultra 5's modern architecture and higher clocks win out. The gap widens in Cinebench R20 multicore (7834 vs 2608, a 66.7% lead) and R15 multicore (1718 vs 625, a 63.6% lead). Single-threaded Cinebench results are even more lopsided: R23 single-core shows 1700 vs 876 (48.5% lead), R20 shows 1105 vs 367 (66.8% lead), and R15 shows 244 vs 88 (63.9% lead).

PassMark results tell a more nuanced story. The Xeon Phi's biggest win is data compression, scoring 332960 against 251651, a 32.3% advantage. It also leads extended instructions (18359 vs 15028, 22.2%) and integer math (84874 vs 73509, 15.5%). However, the Core Ultra 5 dominates PassMark multithread (22422 vs 7306, a 67.4% lead), physics (1482 vs 198, an 86.6% lead), and random string sorting (28980 vs 8956, a 69.1% lead). The single-thread scores are crushing: 3521 vs 460, an 86.9% deficit for the Xeon Phi. Data encryption also heavily favors the Core Ultra 5 (15026 vs 3455, a 77% lead), and floating-point math shows a 46.5% advantage (54867 vs 29356). Prime number finding is nearly a shutout (89 vs 10, an 88.8% lead for the Core Ultra 5).

The Verdict

The data paints a clear picture: the Intel Core Ultra 5 135H is the better processor for virtually every real-world task. It wins 14 of 17 benchmarks, often by massive margins, and does so while consuming a fraction of the power (28 W TDP vs 215 W). Its single-thread performance is nearly eight times better in PassMark single-thread tests, and it leads in all Cinebench multicore tests despite having far fewer cores. For anyone building a general-purpose system, a mobile workstation, or a desktop that needs responsive performance, the Core Ultra 5 135H is the obvious choice.

The Intel Xeon Phi 7210 should only be considered for very specific workloads that match its strengths: data compression, extended instruction sets, and integer math. If a task can fully utilize 256 threads and doesn't require fast single-core response, the Xeon Phi's 32.3% lead in data compression and 22.2% lead in extended instructions could be valuable. However, its 81st percentile ranking is buoyed by these niche wins, and its overall average score of 29245 is essentially tied with the Core Ultra 5's 29093. Given that the Core Ultra 5 achieves parity in average score while winning almost everything else, the Xeon Phi's specialized advantages are hard to justify unless a workload specifically targets its parallel throughput capabilities. For most users, the Core Ultra 5 135H is the pragmatic pick; the Xeon Phi 7210 is a relic for specialized compute tasks.