Intel Core Ultra 5 245K

The Intel Core Ultra 5 245K is a 14-core, 14-thread desktop processor built on the Arrow Lake architecture for Intel Socket 1851. Launched on 2024-10-23, it sits in the Core Ultra Series 2 lineup, produced on a 3 nm process at TSMC with 17,800 million transistors on a 243 mm² die. It carries an average benchmark score of 55304, placing it in the 94th percentile of all CPUs tracked, with a launch MSRP of $319.

Platform and Compatibility

The Core Ultra 5 245K uses Intel Socket 1851, which is the platform for Arrow Lake-S desktop processors. This socket is exclusive to the Core Ultra Series 2 generation, meaning the upgrade path is confined to other Arrow Lake-S parts rather than spanning multiple generations. The processor supports DDR5 memory over a dual-channel memory bus, with a memory bandwidth of 102.4 GB/s. ECC memory is supported, which is notable for workstation-oriented builds that require error correction in memory-heavy tasks. The memory controller is integrated, but the fact pack does not specify maximum capacity or speed ratings beyond the dual-channel width.

For expansion, the CPU provides Gen 5, 20 Lanes (CPU only) on the PCIe interface. This means the processor itself supplies 20 PCIe 5.0 lanes for discrete GPUs and NVMe storage, while additional chipset lanes would be available on the motherboard but are not detailed in the fact pack. The integrated graphics are Arc Xe-LPG Graphics 64EU, so the 245K can output to a display without a discrete GPU, though gaming performance from this iGPU is not benchmarked in the data.

The processor has an unlocked multiplier, so overclocking is possible on compatible motherboards with appropriate power delivery. The production status is Active, and the part number is SRQCT. The market segment is Desktop, and the base clock is 4.20 with a boost clock of 5.20 GHz. The cache hierarchy is substantial: 192 KB (per core) L1, 3 MB (per core) L2, and 24 MB (shared) L3. The 14 threads equal the 14 cores, indicating no hyper-threading on this model, which is a design choice that affects multi-threaded scaling.

Power and Thermals

The thermal design power (TDP) is 125 W, which classifies this chip in the mainstream desktop range rather than the high-TDP flagship tier. This TDP figure implies a capable air cooler is sufficient for stock operation, though the unlocked multiplier means that overclocking will demand a stronger cooling solution—likely a high-end tower cooler or a liquid cooler—but the fact pack does not provide cooler size or wattage details, so those remain qualitative suggestions.

The 3 nm process node from TSMC helps with efficiency, but the 14 cores and 5.20 GHz boost clock still generate meaningful heat under load. The data shows no separate power limit (PL1/PL2) values, so the 125 W TDP is the only thermal guideline. In practice, the 245K will run cooler than higher-core-count parts from the same generation, but the boost behavior depends on motherboard power settings, which are not covered in the fact pack. For a typical build, a mid-range tower cooler with a 120mm fan should handle stock loads, while sustained all-core workloads like rendering may push thermals higher—again, without specific figures, this is an inference from the TDP class.

Benchmark Performance

The benchmark results show a processor that excels in single-threaded performance while holding its own in multi-threaded tasks. In Cinebench R23, the multicore score is 37001 and the single-core score is 5223. The single-core figure places it among the fastest desktop CPUs for lightly threaded workloads, and the multicore score reflects the 14 physical cores without hyper-threading.

In Cinebench R20, the multicore score is 15540 and single-core is 2193. The Cinebench R15 results are 3729 for multicore and 526 for single-core. These scores scale consistently across Cinebench versions, indicating a stable performance profile.

Passmark results add more texture. The Passmark single-thread score is 4700, and the multithread score is 43527. The floating point math score is 131107, while integer math is 98850—the floating point advantage suggests strong FPU throughput for scientific and media workloads. Data compression scores 462110, data encryption 33481, and extended instructions 37822. Find prime numbers scores only 423, and random string sorting scores 55882. The physics score is 3348.

Relative to the nearest rivals, the 245K is essentially a dead heat with the Intel Core Ultra 5 245KF, which has an average score of 55421 and a delta of -0.2%—meaning the 245K is 0.2% slower. Against the Intel Core i9-14900T (avg score 55778), the 245K is 0.8% behind. Against AMD options, the 245K leads the AMD Ryzen 9 9900X3D (avg score 54681) by 1.1%, and the AMD Ryzen 9 9900X (avg score 54450) by 1.6%. These deltas are small in real-world terms, but they show the 245K is positioned in the same performance band as high-end chips from both Intel and AMD, despite being a lower-tier SKU.

FAQ

Q: Does the Core Ultra 5 245K support ECC memory?

A: Yes, ECC memory is supported, which is valuable for systems that need data integrity in compute tasks.

Q: What is the PCIe version and lane count from the CPU?

A: The CPU provides Gen 5, 20 Lanes (CPU only), so you get PCIe 5.0 bandwidth for a GPU and one or two NVMe drives directly from the processor.

Q: How does the 245K compare to the Core Ultra 5 245KF?

A: The 245K is 0.2% slower than the 245KF in average benchmark score, with the 245KF at 55421 and the 245K at 55304. The difference is negligible in practice.

Q: What is the boost clock of this processor?

A: The boost clock is 5.20 GHz, while the base clock is 4.20 GHz.

Q: Is the multiplier unlocked for overclocking?

A: Yes, the multiplier is unlocked, allowing manual overclocking on compatible Intel Socket 1851 motherboards.

Q: How many threads does the 245K have?

A: It has 14 threads, equal to its 14 cores, meaning no simultaneous multi-threading is enabled on this model.

How It Compares

Intel Core Ultra 5 245KF: This is the closest rival, essentially the same chip without integrated graphics. The 245K trails by a mere 0.2% in average score (55304 vs 55421). For users who need the Arc Xe-LPG Graphics 64EU for troubleshooting or basic display output, the 245K is the safer pick; otherwise, the 245KF may offer a tiny performance edge, though the difference is within run-to-run variance.

Intel Core i9-14900T: The 14900T is a lower-power variant of the previous generation’s flagship, with an average score of 55778. The 245K is 0.8% behind. The 14900T likely draws less power (though its TDP is not in the fact pack), but the 245K brings newer architecture and PCIe Gen 5 support, which the 14900T may not have. For a new build, the 245K’s platform advantages outweigh the slight score deficit.

AMD Ryzen 9 9900X3D: The 3D V-Cache model from AMD scores 54681 on average, which is 1.1% lower than the 245K. The 9900X3D is known for gaming cache advantages, but the fact pack data shows the 245K holds a lead in aggregate benchmarks. For productivity workloads, the 245K is competitive, though gaming-specific tests are not in the data.

AMD Ryzen 9 9900X: The non-X3D 9900X scores 54450, putting the 245K 1.6% ahead. The 9900X is a 12-core part (cores not specified in the fact pack, but the name implies it), so the 245K’s 14 cores likely help in multi-threaded tasks. The delta is small, but it shows Intel’s mid-range offering can outpace AMD’s high-end mainstream chip in average performance.

Single-Thread vs Multi-Thread Behavior

The 245K demonstrates a pronounced strength in single-threaded performance. The Cinebench R23 single-core score of 5223 is within striking distance of the best desktop CPUs, and the Passmark single-thread score of 4700 confirms this. The boost clock of 5.20 GHz drives this, and the lack of hyper-threading means each core is dedicated to one thread, which can reduce contention in lightly threaded workloads. For tasks like web browsing, office applications, or older games that rely on one or two cores, the 245K will feel exceptionally responsive.

In multi-threaded workloads, the picture is more nuanced. The Cinebench R23 multicore score of 37001 is strong for a 14-core part, but the absence of SMT means that 14 threads are the maximum. Compare that to rivals with similar core counts but hyper-threading—the fact pack does not specify those rivals’ thread counts, but the 245K’s multicore scores are only slightly behind the i9-14900T (which likely has more threads). The Passmark multithread score of 43527 is respectable, but the find prime numbers score of 423 is notably low, suggesting that integer-heavy, branch-dependent workloads may not scale as well. Conversely, floating point math at 131107 is excellent, indicating strong FPU throughput for scientific simulations, rendering, and code compilation.

For real-world use, this split means the 245K shines in hybrid workloads: fast single-thread for UI responsiveness and everyday apps, plus solid multi-core for content creation. The data compression score of 462110 and random string sorting at 55882 show good memory and cache utilization, which benefits database and file-archive tasks. However, for heavily threaded all-core loads like video encoding, the 245K will trail chips with more threads—the data shows it is only 0.8% behind the i9-14900T in average score, so the difference is modest. The key takeaway is that the 245K is a balanced desktop CPU, not a pure multi-thread monster, and its single-thread prowess makes it a strong choice for gamers and professionals who need both speed and responsiveness.