Intel Core 5 221E vs Intel Core Ultra X9 388H Comparison

Where Each One Wins

The benchmark data splits these two processors into clearly different usage profiles. The Intel Core 5 221E wins 4 of the 17 head-to-head tests, while the Intel Core Ultra X9 388H wins 13. That is not a close contest overall, but the individual wins matter more than the total.

The Core 5 221E takes the single-core crown in Cinebench R15 and R23, plus the multi-core R23 test and PassMark integer math. Those wins point toward workloads that rely on high clock speeds and traditional x86 integer throughput. The 221E boosts to 5.20 GHz, which helps explain its R23 single-core score of 3661 against the Ultra X9's 2200.5. It also holds a 37.1% lead in R23 multi-core, a substantial margin that suggests sustained all-core performance on the desktop platform.

The Core Ultra X9 388H dominates everywhere else. It wins both Cinebench R20 tests, both PassMark single-thread tests, and every PassMark workload except integer math. The biggest gaps come in encryption, extended instructions, and prime number finding, where the Ultra X9 leads by 32.6%, 39.2%, and 51.7% respectively. Those are not marginal advantages; they indicate a processor with significantly stronger cryptographic and SIMD-style execution resources.

For a use-case split, the data suggests the Core 5 221E suits single-threaded legacy applications and integer-heavy desktop tasks, especially where older Cinebench versions and high boost clocks matter. The Core Ultra X9 388H suits modern multi-threaded mobile workloads, encryption, compression, floating-point math, and physics simulations. The Ultra X9 also wins the PassMark multithread test by 17.1%, confirming its broader multi-core capability despite having fewer threads.

FAQ

Q: Which processor has the higher average benchmark score?

A: The Intel Core Ultra X9 388H records an average benchmark score of 44466, compared to 40144 for the Intel Core 5 221E. The Ultra X9 sits at the 88th percentile of all CPUs, while the 221E sits at the 87th.

Q: How do the two compare in Cinebench R23 multi-core?

A: The Core 5 221E wins decisively, scoring 25933 against 18911 for the Ultra X9, a 37.1% advantage. This is the largest multi-core gap in the head-to-head data.

Q: What explains the Ultra X9's wins in encryption and extended instructions?

A: The data shows the Ultra X9 scores 28490 in PassMark data encryption versus 19205 for the 221E, a 32.6% lead. In extended instructions, it scores 29943 versus 18216, a 39.2% lead. These results indicate the Ultra X9 has stronger dedicated execution units for these workload types.

Q: Which processor has more cores and threads?

A: The Core Ultra X9 388H has 16 cores and 16 threads. The Core 5 221E has 14 cores and 20 threads. Despite having fewer cores, the 221E has more threads due to Hyper-Threading support.

Q: What are the launch dates for these processors?

A: The Core 5 221E was released on 2025-01-12. The Core Ultra X9 388H was released on 2026-01-04. Both are currently active in production.

Q: How does the single-thread PassMark score compare?

A: The Ultra X9 leads slightly, scoring 4280 versus 4147 for the 221E, a 3.1% difference. This is the closest head-to-head result in the entire comparison.

Head-to-Head Benchmarks

The largest win for the Core 5 221E comes in Cinebench R23 single-core, where it scores 3661 against 2200.5 for the Ultra X9, a 66.4% advantage. That is an enormous gap and indicates the 221E's 5.20 GHz boost clock delivers far stronger single-thread performance in this specific test. The R23 multi-core test also favors the 221E by 37.1%, with scores of 25933 and 18911. In Cinebench R15 single-core, the 221E wins by 18.9%, scoring 368 versus 309.5. The integer math test goes to the 221E by 29.6%, with 117813 against 90882.

The Core Ultra X9 388H answers with several large wins. The biggest is PassMark find prime numbers, where it scores 358 versus 173, a 51.7% lead. Extended instructions show a 39.2% gap, with scores of 29943 and 18216. Data encryption goes to the Ultra X9 by 32.6%, scoring 28490 versus 19205. Floating-point math favors the Ultra X9 by 29.8%, with 112550 against 79028. Physics simulation shows a 30.9% lead, scoring 3226 versus 2230. The R20 multi-core test goes to the Ultra X9 by 16.9%, with 13101 against 10891, and the same 16.9% margin appears in R20 single-core, where the Ultra X9 scores 1849 versus 1537.

The remaining wins are smaller but consistent. PassMark multithread favors the Ultra X9 by 17.1%, with 36811 against 30510. Random string sorting goes to the Ultra X9 by 14.4%, scoring 44010 versus 37686. Data compression shows a 10.4% lead for the Ultra X9, with 361763 against 324285. The single-thread PassMark tests show a narrow 3.1% edge for the Ultra X9, scoring 4280 versus 4147 in both the single_thread and singlethread entries.

The overall pattern is clear. The 221E wins where raw clock speed and integer throughput dominate. The Ultra X9 wins where encryption, SIMD instructions, floating-point math, and multi-threaded throughput matter. The Ultra X9 also wins the two most recent Cinebench versions, R20 and R23, in single-core, which suggests its architecture handles newer instruction mixes better despite the lower boost clock.

Specification Differences

The two processors differ across nearly every major specification field. The Core 5 221E uses 14 cores and 20 threads, while the Core Ultra X9 388H uses 16 cores and 16 threads. The 221E has a base clock of 2.70 GHz and a boost clock of 5.20 GHz. The Ultra X9 has a base clock of 2.10 GHz and a boost clock of 5.10 GHz.

Thermal design power differs sharply. The 221E carries a 65 W TDP, while the Ultra X9 carries a 25 W TDP. That is a 40 W difference, reflecting the desktop versus mobile market split.

The socket types are incompatible: the 221E uses Intel Socket 1700, and the Ultra X9 uses Intel BGA 2540. The 221E supports DDR4 and DDR5 memory with dual-channel access and 89.6 GB/s bandwidth. The Ultra X9 supports only LPDDR5X with dual-channel access and 153.6 GB/s bandwidth. The Ultra X9 has significantly higher memory bandwidth despite the lower TDP.

ECC memory support is present on the 221E but absent on the Ultra X9. PCIe lanes also differ: the 221E provides Gen 5 with 16 lanes (CPU only), while the Ultra X9 provides Gen 5 with 4 lanes (CPU only). The integrated graphics differ as well, with the 221E using UHD Graphics 730 and the Ultra X9 using Arc B390.

The launch MSRP for the 221E is $232. The Ultra X9 has no recorded launch MSRP in the database. The 221E has a die size of 257 mm², while the Ultra X9 has no recorded die size.

Architecture Differences

The Core 5 221E belongs to the Bartlett Lake generation and uses the Bartlett Lake codename. It is built on a 10 nm process node at Intel's foundry. The Core Ultra X9 388H belongs to the Core Ultra Series 3 and uses the Panther Lake architecture with the Panther Lake-H generation. It is built on a 3 nm process node, also at Intel's foundry.

The cache hierarchies differ substantially. The 221E has 80 KB of L1 per core, 2 MB of L2 per core, and 24 MB of shared L3 cache. The Ultra X9 has 192 KB of L1 per core, 3 MB of L2 per core, and 18 MB of shared L3 cache. The Ultra X9 has larger per-core caches, but the 221E has more total L3 cache.

The process node difference is notable: 10 nm versus 3 nm. That explains the Ultra X9's ability to deliver higher memory bandwidth (153.6 GB/s versus 89.6 GB/s) and more cores (16 versus 14) while maintaining a much lower 25 W TDP. The 221E compensates with a higher boost clock of 5.20 GHz versus 5.10 GHz.

The market segments differ, with the 221E marked as Desktop and the Ultra X9 marked as Mobile. The 221E supports ECC memory, which the Ultra X9 does not. The PCIe lane counts reflect their platforms, with 16 lanes for the desktop part and 4 lanes for the mobile part.

Neither processor has an unlocked multiplier. The 221E has a part number of SRQDVQ659, and the Ultra X9 has a part number of SA4QWQ9EK.

The Verdict

The benchmark data supports a clear division of roles. The Intel Core 5 221E should be chosen for desktop workloads that favor high single-core clock speeds and integer math. Its 66.4% lead in Cinebench R23 single-core and 29.6% lead in integer math are decisive. It also offers ECC memory support, DDR4 and DDR5 compatibility, and a 16-lane Gen 5 PCIe connection, making it suitable for desktop systems that need reliability features and expandability. Its 24 MB of shared L3 cache and 20 threads provide strong multi-threaded performance in older Cinebench versions, though it loses the R20 multi-core test.

The Intel Core Ultra X9 388H should be chosen for mobile platforms where power efficiency and modern workload acceleration matter. Its 25 W TDP and 3 nm process node deliver 16 cores and 153.6 GB/s memory bandwidth in a mobile package. The data shows it wins 13 of 17 benchmarks, including all PassMark workloads except integer math, plus both R20 tests and the R15 multi-core test. Its 51.7% lead in prime number finding and 39.2% lead in extended instructions indicate strong execution resources for encryption and SIMD workloads. The Arc B390 integrated graphics and LPDDR5X memory support align with mobile usage.

The average benchmark scores confirm the overall hierarchy: the Ultra X9 records 44466 against 40144 for the 221E, a difference of roughly 10.8%. Both processors sit near the top of the database, at the 87th and 88th percentiles respectively. The nearest rivals for the 221E include the AMD Ryzen 7 7700 with a 0.2% higher average score, while the Ultra X9's closest rival is the AMD Ryzen 5 7500X3D, which leads by 0.2%.

For users who prioritize single-thread legacy performance, integer math, and desktop expandability, the Core 5 221E is the data-backed choice. For users who prioritize multi-threaded throughput, encryption, floating-point math, and mobile efficiency, the Core Ultra X9 388H is the clear winner. The 17 benchmark results show no ambiguity: the Ultra X9 dominates the modern workload profile, while the 221E holds specific niches.