Intel Core Ultra 5 250K Plus

The Intel Core Ultra 5 250K Plus is a desktop processor from the Core Ultra Series 2, built on a 3 nm TSMC process with 18 cores and 18 threads. Its benchmark results place it in the 93rd percentile among all CPUs, with an average benchmark score of 66,855, indicating strong overall performance for a mainstream desktop part.

Benchmark Performance

The Core Ultra 5 250K Plus delivers a multi-threaded Cinebench R23 score of 30,867 points, which is a substantial figure for a processor in its class. In Cinebench R20, the multi-core score reaches 18,442 points, while the older R15 test yields 4,640 points. These results demonstrate a consistent scaling across different versions of the rendering workload, with the processor maintaining a strong output as the test complexity increases.

Single-core performance is equally notable, with a Cinebench R23 single-core score of 2,261 points and an R20 score of 2,603 points. The R15 single-core result is 328 points. These figures suggest that the processor is capable of handling lightly-threaded tasks with high efficiency, which is critical for everyday responsiveness and gaming performance.

In PassMark testing, the processor scores 51,596 in the multithread benchmark and 4,757 in single-thread performance. The data compression test shows a score of 568,721, while data encryption achieves 42,144. Extended instructions score 44,565, and the floating-point math test reaches 162,692. Integer math performance is recorded at 125,091, and the prime number finding test scores 486. The random string sorting benchmark completes with a score of 69,090, and physics simulation scores 3,494.

Compared to its nearest rivals, the 250K Plus shows a very tight competitive landscape. The AMD EPYC 4465P has an average score of 66,925, which is 0.1% higher than the 250K Plus, making the difference effectively negligible in real-world terms. The Intel Xeon 6515P scores 67,006, a 0.2% advantage. The Intel Core Ultra 9 275HX, a mobile part, scores 67,469, which is 0.9% higher. The only rival that the 250K Plus beats is the Intel Core Ultra 5 250KF Plus, which scores 66,159, a 1.1% deficit. This grouping indicates that the 250K Plus sits in a highly competitive performance band where the differences between products are within the margin of error for many applications.

Single-Thread vs Multi-Thread Behavior

The performance split between single-thread and multi-thread workloads reveals a balanced design. With 18 cores and 18 threads, the processor has no hyper-threading, meaning each core handles exactly one thread. This configuration is unusual for a high-core-count part, as many competitors use simultaneous multithreading to boost throughput. However, the benchmark scores suggest that the physical cores are efficient enough to compensate.

The Cinebench R23 multi-core to single-core ratio is approximately 13.65, which indicates strong scaling across the 18 cores. This ratio is typical for a processor with a high core count and good interconnect bandwidth. In PassMark, the multithread score of 51,596 versus the single-thread score of 4,757 yields a ratio of about 10.84, which is slightly lower but still indicates effective parallelization.

For real workloads, this means that tasks like video rendering, 3D modeling, and code compilation that can utilize all 18 cores will see near-linear performance gains. Conversely, tasks that rely on a single thread, such as legacy software or certain game engines, will benefit from the high boost clock of 5.30 GHz and the strong single-core scores. The base clock of 4.20 GHz is also relatively high, ensuring that even without boost, the processor maintains solid performance.

The data compression score of 568,721 is particularly strong, suggesting that the processor excels at tasks involving large data sets and compression algorithms. The encryption score of 42,144 is moderate, indicating that while the processor can handle encryption workloads, it is not specifically optimized for cryptographic operations compared to some server-grade parts.

Platform and Compatibility

The Intel Core Ultra 5 250K Plus uses the Intel Socket 1851, which is the platform for the Core Ultra Series 2 desktop processors. This socket supports DDR5 memory in a dual-channel configuration, with a memory bandwidth of 115.2 GB/s. ECC memory is supported, which is a notable feature for users who require error correction for data integrity, such as those running unattended servers or workstations.

PCIe support is Gen 5 with 20 lanes available from the CPU. This provides high-bandwidth connectivity for modern graphics cards and NVMe storage devices. The 20 lanes are sufficient for a single high-end GPU and a fast SSD, though users with multiple expansion cards may need to consider the lane allocation carefully.

The processor includes integrated graphics in the form of Arc Xe-LPG Graphics with 64 execution units. This is a capable iGPU that can handle basic display output and light graphics workloads, though it is not intended for gaming or heavy GPU compute tasks. The production status is active, and the release date is March 10, 2026.

The socket 1851 platform offers an upgrade path within the Core Ultra Series 2 family, though the exact future compatibility beyond this generation is not specified. The multiplier is unlocked, allowing for overclocking to extract additional performance, provided the user has adequate cooling and a compatible motherboard.

How It Compares

vs AMD EPYC 4465P: The EPYC 4465P holds a 0.1% higher average score, which is statistically insignificant. Both processors are effectively tied in overall performance. The EPYC is a server-oriented part, while the 250K Plus is a desktop CPU, so the choice comes down to platform features rather than raw speed.

vs Intel Xeon 6515P: The Xeon 6515P is 0.2% faster on average. This is a marginal difference that would be imperceptible in most workloads. The Xeon targets professional server environments with different memory and expansion capabilities, while the 250K Plus offers a more consumer-friendly platform with integrated graphics.

vs Intel Core Ultra 9 275HX: The 275HX, a mobile processor, outperforms the 250K Plus by 0.9%. This is a surprising result given that the 275HX is designed for laptops and likely has a lower power envelope. The gap is small but consistent, indicating that high-end mobile parts have caught up to desktop counterparts in certain metrics.

vs Intel Core Ultra 5 250KF Plus: The 250KF Plus is the only rival that the 250K Plus beats, with a 1.1% advantage. The "KF" variant likely lacks integrated graphics, making the "K Plus" version slightly more capable in terms of features, though the performance difference is modest.

Power and Thermals

The Intel Core Ultra 5 250K Plus has a thermal design power (TDP) of 125 watts. This places it in the mid-range for high-performance desktop processors, requiring a capable air cooler or a modest liquid cooler to maintain optimal temperatures under load. The TDP class suggests that the processor is designed for sustained multi-core workloads without excessive power draw, though overclocking will increase heat output beyond the stock TDP.

The 3 nm process node from TSMC contributes to power efficiency, as smaller transistors typically reduce power consumption for a given performance level. The 17,800 million transistors on a 243 mm² die indicate a dense design that balances performance and efficiency. Users with a high-quality tower air cooler or a 240mm-class liquid cooler will likely see stable operation, but those planning aggressive overclocks should consider higher-end cooling solutions.

The unlocked multiplier allows for voltage and frequency adjustments, which can push power consumption above the 125 W TDP. Without specific power measurements in the benchmark data, it is reasonable to assume that the processor operates within its TDP class during stock operation, with headroom for enthusiast tuning.

FAQ

Q: What is the socket type for the Intel Core Ultra 5 250K Plus?

A: The processor uses Intel Socket 1851.

Q: Does the processor support ECC memory?

A: Yes, ECC memory is supported.

Q: What is the maximum boost clock speed?

A: The boost clock is 5.30 GHz.

Q: How many cores and threads does the processor have?

A: It has 18 cores and 18 threads.

Q: What integrated graphics does the processor include?

A: It includes Arc Xe-LPG Graphics with 64 execution units.

Q: Is the multiplier unlocked for overclocking?

A: Yes, the multiplier is unlocked.

Who Should Consider It

The Intel Core Ultra 5 250K Plus is well-suited for users who need strong multi-threaded performance in a desktop platform. The Cinebench R23 multi-core score of 30,867 indicates that it can handle video editing, 3D rendering, and software compilation with ease. The PassMark multithread score of 51,596 reinforces this capability, making it a good choice for content creators who rely on heavily threaded applications.

For gamers, the single-thread performance is the key metric. The Cinebench R23 single-core score of 2,261 and the PassMark single-thread score of 4,757 are strong, suggesting that the processor will not bottleneck modern GPUs in most gaming scenarios. The high boost clock of 5.30 GHz ensures snappy performance in games that are sensitive to single-core speed.

Office and productivity users will find the processor more than adequate for everyday tasks. The high base clock of 4.20 GHz provides responsive performance in typical office applications, while the 18 cores offer ample headroom for background tasks like antivirus scans, file indexing, and virtual machines. The integrated graphics also eliminate the need for a discrete GPU in basic office setups, reducing overall system cost and complexity.

Users who require ECC memory support will find this processor appealing, as it is a relatively uncommon feature on desktop platforms. This makes it suitable for small-scale servers or workstations where data integrity is paramount. The PCIe Gen 5 support with 20 lanes also provides future-proofing for high-speed storage and graphics.

Architecture and Design

The Intel Core Ultra 5 250K Plus is built on the Arrow Lake Refresh architecture, succeeding the original Arrow Lake design. The codename is "Arrow Lake Refresh," and it is part of the Core Ultra Series 2 generation. The processor is fabricated on a 3 nm process node by TSMC, which represents a leading-edge manufacturing technology that enables high transistor density and improved power efficiency.

The silicon contains 17,800 million transistors on a die size of 243 mm². This density is a hallmark of the 3 nm process, allowing for a complex core layout and large cache hierarchy. The cache configuration includes 192 KB of L1 cache per core, 3 MB of L2 cache per core, and 30 MB of shared L3 cache. This hierarchy provides low-latency access to frequently used data, which is critical for both single-thread and multi-thread performance.

The core layout consists of 18 physical cores with no hyper-threading, meaning 18 threads total. This design choice prioritizes raw core performance over thread duplication, which can be beneficial for workloads that do not scale well with virtual threads. The absence of hyper-threading also simplifies power management and reduces the risk of thermal throttling in dense multi-core workloads.

The memory support is DDR5 in a dual-channel configuration, with a theoretical bandwidth of 115.2 GB/s. This bandwidth is sufficient for the 18 cores to feed data without bottlenecks in most applications. The integrated graphics, Arc Xe-LPG with 64 EU, are based on Intel's discrete GPU architecture, providing hardware acceleration for video encoding and decoding, as well as basic 3D rendering.

The launch MSRP is $199, positioning the processor as a mainstream desktop offering. The part number is SA4UZ, and the market segment is Desktop, with an active production status. The combination of the 3 nm process, high core count, and modern platform features makes this processor a compelling option for users building a high-performance desktop system in the Core Ultra Series 2 generation.