Intel Core i5-1250P vs Intel Core i9-10900 Comparison

The Intel Core i9-10900 and Intel Core i5-1250P present a fascinating generational clash. The former is a 10th Gen desktop flagship from 2020, while the latter is a 12th Gen mobile processor from 2022. The data shows a surprisingly consistent outcome across all shared benchmarks, with the older desktop part taking a narrow but uniform lead, despite the mobile chip’s newer architecture and higher core count.

Head-to-Head Benchmarks

The head-to-head results are remarkably one-sided, with the Intel Core i9-10900 winning all six shared Cinebench tests. In the multi-core tests, the i9-10900 consistently outperforms the i5-1250P by a margin of 3.9%. This pattern holds across Cinebench R15, R20, and R23, with scores of 1634 vs 1573, 6811 vs 6556, and 16219 vs 15610 respectively. The consistency of this 3.9% delta across three different rendering workloads suggests a stable performance gap that scales predictably with thread count.

The single-core results tell a slightly different story. The i9-10900 wins each single-threaded test, but the margin shrinks to 3.6% in Cinebench R15 (230 vs 222) and then returns to 3.9% in both R20 (961 vs 925) and R23 (2289 vs 2203). This is noteworthy because the i5-1250P has a higher boost clock of 4.40 GHz compared to the i9-10900’s 5.20 GHz, yet the newer architecture cannot overcome the raw clock advantage. The i9-10900’s lead in single-core performance defies the expectation that a 2022 mobile part should beat a 2020 desktop part in lightly threaded tasks.

Examining the broader benchmark landscape, the i9-10900 also holds its own in the 3DMark and Geekbench suites. Its 3DMark single-thread score of 815 and Geekbench single-core score of 1651 indicate strong per-core capability. The i5-1250P does not have comparable 3DMark or Geekbench scores in the data, so the head-to-head comparison is limited to Cinebench. However, the average benchmark scores show the i9-10900 at 4614, which places it in the 58th percentile of all CPUs, while the i5-1250P averages 4515, also in the 58th percentile. This near-identical percentile ranking confirms that the two processors occupy the same performance tier overall, despite the i9-10900’s consistent head-to-head wins.

The i9-10900’s nearest rivals provide additional context. It sits between the Intel Core i9-9900KF (averaging 4652, a 0.8% difference) and the Intel Xeon W-2145 (averaging 4576, a 0.8% difference). The i5-1250P, meanwhile, is bracketed by the Intel Core i7-12700TE (averaging 4513, a 0% difference) and the AMD Ryzen Embedded V2748 (averaging 4532, a 0.4% difference). This places the mobile chip in a peer group of efficient, mid-range parts, while the desktop chip competes with older high-end workstation silicon.

The Verdict

The data clearly favors the Intel Core i9-10900 in every shared benchmark, making it the stronger choice for raw compute performance. Users who prioritize maximum threaded throughput for rendering or encoding should select the i9-10900, as it leads the i5-1250P by 3.9% in all multi-core Cinebench tests. The desktop part also wins every single-core test, so there is no scenario in the available data where the i5-1250P outperforms it.

However, the i5-1250P is not without merit. Its 28W TDP versus the i9-10900’s 65W TDP suggests significantly lower power consumption, though the fact pack does not provide direct power efficiency metrics. The mobile chip’s BGA 1744 socket and active production status make it a viable choice for compact, portable systems where the i9-10900’s Socket 1200 and end-of-life status are prohibitive. The i5-1250P also supports DDR5 memory alongside DDR4, whereas the i9-10900 is limited to DDR4.

For a desktop workstation or high-performance tower, the i9-10900 is the clear winner. For a thin-and-light laptop or low-power SFF build, the i5-1250P offers competitive performance in a much smaller power envelope. The data does not indicate any benchmark where the i5-1250P takes the lead, so the decision hinges on platform requirements rather than performance.

Architecture Differences

The two processors come from entirely different design philosophies. The i9-10900 uses Intel’s Comet Lake architecture on a 14 nm process node, while the i5-1250P uses the newer Alder Lake architecture on a 10 nm node. The foundry is Intel in both cases, but the die size differs: the i5-1250P has a 217 mm² die, while the i9-10900’s die size is not listed.

Core counts are a point of divergence. The i9-10900 has 10 cores and 20 threads, while the i5-1250P has 12 cores and 16 threads. This unusual configuration for the mobile chip indicates a hybrid design, though the fact pack does not specify performance versus efficiency cores. The i5-1250P’s higher core count but lower thread count suggests that some cores lack hyper-threading, which could explain its slight multi-core deficit despite having more physical cores.

Cache hierarchies also differ significantly. The i9-10900 has 64 KB of L1 cache per core, 256 KB of L2 per core, and a 20 MB shared L3 cache. The i5-1250P has 80 KB of L1 per core, a much larger 1.25 MB of L2 per core, but only 12 MB of shared L3. The smaller L3 cache on the mobile part may contribute to its performance gap in rendering workloads. The i5-1250P’s larger L2 cache is a hallmark of the newer architecture, but it does not compensate for the reduced L3 capacity.

Memory support diverges as well. The i9-10900 supports DDR4 only, with a memory bandwidth of 46.9 GB/s, while the i5-1250P supports both DDR4 and DDR5, though its bandwidth is not listed. PCIe capabilities differ, with the i9-10900 offering Gen 3 with 16 lanes (CPU only) versus the i5-1250P’s Gen 4 with 20 lanes (CPU only). The integrated graphics also differ, with the i9-10900 featuring UHD Graphics 630 and the i5-1250P featuring Iris Xe 80EU.

FAQ

Q: Which processor has a higher boost clock?

A: The Intel Core i9-10900 has a boost clock of 5.20 GHz, while the Intel Core i5-1250P boosts to 4.40 GHz.

Q: Does the i5-1250P support DDR5 memory?

A: Yes, the i5-1250P supports both DDR4 and DDR5, while the i9-10900 supports only DDR4.

Q: What is the difference in average benchmark scores?

A: The i9-10900 averages 4614, and the i5-1250P averages 4515, a difference of approximately 99 points in favor of the desktop chip.

Q: Are both processors in the same performance percentile?

A: Yes, both the i9-10900 and the i5-1250P are in the 58th percentile of all CPUs.

Q: Which processor has more cores and threads?

A: The i9-10900 has 10 cores and 20 threads, while the i5-1250P has 12 cores and 16 threads.

Q: Is the i9-10900 still in production?

A: No, the i9-10900 is end-of-life, while the i5-1250P is active.

Where Each One Wins

The i9-10900 wins every benchmark category present in the head-to-head data. In multi-core rendering, it takes Cinebench R15, R20, and R23 by 3.9% each. In single-core rendering, it wins R15 by 3.6% and R20/R23 by 3.9%. For users running CPU-bound tasks like video encoding, 3D rendering, or scientific computation, the i9-10900 is the superior choice based on these scores.

The i5-1250P does not win any of the six shared benchmarks, but its design points to different strengths. Its 28W TDP and BGA 1744 socket make it suitable for laptops and other power-constrained environments. The mobile chip’s support for DDR5 memory and Gen 4 PCIe lanes could provide system-level advantages in newer platforms, even if the CPU itself is slightly slower. The i5-1250P’s 12 cores, despite having fewer threads, may offer better parallel efficiency in certain workloads that benefit from more physical cores, though the data does not confirm this.

The i9-10900’s 20 MB L3 cache versus the i5-1250P’s 12 MB could also make it better for workloads with large working sets, such as database operations or complex simulations. However, the i5-1250P’s larger L2 cache (1.25 MB per core) might improve performance for latency-sensitive tasks that fit within that cache level.

Specification Differences

The two processors differ in nearly every major specification category. The i9-10900 has 10 cores and 20 threads, while the i5-1250P has 12 cores and 16 threads. The base clock is listed as 2.80 GHz for the i9-10900 and 1700.00 MHz for the i5-1250P, though this appears to be a formatting difference; the boost clocks are 5.20 GHz and 4.40 GHz respectively. The TDP is a major split: 65W for the desktop chip versus 28W for the mobile chip.

The sockets are incompatible: the i9-10900 uses Intel Socket 1200, and the i5-1250P uses Intel BGA 1744. Process nodes differ, with the i9-10900 on 14 nm and the i5-1250P on 10 nm. The i5-1250P has a die size of 217 mm², while the i9-10900’s is not listed. Cache configurations are distinct: the i9-10900 has 64 KB L1 per core, 256 KB L2 per core, and 20 MB shared L3; the i5-1250P has 80 KB L1 per core, 1.25 MB L2 per core, and 12 MB shared L3.

Memory support splits between DDR4-only (i9-10900) and DDR4/DDR5 (i5-1250P). The i9-10900 has a listed memory bandwidth of 46.9 GB/s, while the i5-1250P has none. PCIe capabilities differ, with Gen 3 16 lanes versus Gen 4 20 lanes. Integrated graphics are UHD Graphics 630 for the i9-10900 and Iris Xe 80EU for the i5-1250P. The market segments are Desktop versus Mobile, production statuses are End-of-life versus Active, and release dates are April 2020 versus February 2022. The i9-10900 has a launch MSRP of $483, while the i5-1250P has no listed launch MSRP. Both lack an unlocked multiplier.