Intel Core 7 251TE vs Intel Core Ultra 5 245KF Comparison

The Intel Core 7 251TE and the Intel Core Ultra 5 245KF occupy different positions in Intel’s desktop lineup, and the recorded data shows a clear performance hierarchy between them. The Core Ultra 5 245KF delivers a dominant victory in nearly every benchmark category, while the Core 7 251TE secures a single, notable win in integer math. This analysis examines the head-to-head results, architectural differences, and the specific workloads where each processor excels.

Head-to-Head Benchmarks

The benchmark data shows a decisive overall victory for the Intel Core Ultra 5 245KF, which wins 16 of the 17 recorded head-to-head tests. The Core 7 251TE manages a single win. The margin of victory for the Core Ultra 5 is substantial and consistent across both multi-threaded and single-threaded workloads.

In the Cinebench suite, the Core Ultra 5 245KF outperforms the Core 7 251TE by a consistent margin of 30.4% across all six tests. This includes multi-core scores of 3693 versus 2572 in R15, 15391 versus 10717 in R20, and 36647 versus 25518 in R23. The single-core results follow the same pattern, with the Core Ultra 5 scoring 521 versus 362 in R15, 2172 versus 1512 in R20, and 5173 versus 3602 in R23. The uniformity of the 30.4% delta across these tests indicates a broad architectural advantage rather than a workload-specific strength.

The Passmark results show a similar trend, though with more variation in the margins. The largest gap appears in the `passmark_find_prime_numbers` test, where the Core Ultra 5 scores 416 versus 140 for the Core 7, a 66.3% advantage. This test is highly sensitive to single-core efficiency and clock speed, and the data reflects the Core Ultra 5’s superior per-thread performance. The `passmark_extended_instructions` test also shows a wide gap, with the Core Ultra 5 scoring 37912 versus 16974, a 55.2% difference, indicating a strong advantage in SIMD and specialized instruction throughput.

Other Passmark tests show the Core Ultra 5 leading by smaller but still significant margins. It wins `passmark_data_encryption` by 33.6% (33381 versus 22176), `passmark_floating_point_math` by 34.9% (131546 versus 85607), and `passmark_physics` by 35.4% (2998 versus 1938). The `passmark_multithread` score shows a 30.4% lead (43110 versus 30022), aligning with the Cinebench multi-core results. The `passmark_single_thread` and `passmark_singlethread` tests, which are identical records, show the Core Ultra 5 ahead by 24.3% (4715 versus 3568).

The Core 7 251TE’s lone victory comes in `passmark_integer_math`, where it scores 125739 against the Core Ultra 5’s 98854, a 27.2% advantage. This is a notable result, as it suggests the Core 7’s higher core count and thread count provide a tangible benefit in pure integer arithmetic workloads that scale well with parallelism. The Core 7 also comes closer in `passmark_random_string_sorting`, though the Core Ultra 5 still wins with a score of 55206 versus 39643, a 28.2% margin.

The average benchmark scores place the two processors far apart. The Core Ultra 5 245KF has an average benchmark score of 55093, while the Core 7 251TE sits at 41650. This places the Core Ultra 5 in the 91st percentile of all CPUs in the database, while the Core 7 lands in the 88th percentile. The nearest rivals for the Core Ultra 5 include the AMD Ryzen 9 9900X3D, which is 0.6% behind, and the Intel Core Ultra 5 245K, which is 1.9% behind. The Core 7’s nearest rivals are much closer in average score, including the Intel Core i7-14700T, which is 0.6% ahead, and the Intel Core i7-12850HX, which is 0.3% behind.

Architecture Differences

The two processors are built on fundamentally different architectures and manufacturing processes. The Intel Core 7 251TE uses the Bartlett Lake architecture, based on a 10 nm process node fabricated by Intel. It features 24 cores and 32 threads, a configuration that emphasizes parallel throughput. The die size is 215 mm². In contrast, the Intel Core Ultra 5 245KF uses the Arrow Lake architecture, specifically Arrow Lake-S, fabricated by TSMC on a 3 nm process node. It has 14 cores and 14 threads, with a die size of 243 mm² and 17,800 million transistors.

The core count difference is significant. The Core 7 251TE has 24 cores and 32 threads, meaning it uses hyper-threading to reach 32 threads from 24 physical cores. The Core Ultra 5 245KF has 14 cores and 14 threads, indicating no hyper-threading support. This explains why the Core 7 wins the integer math test, as it has more than double the thread count to throw at that workload. However, the Core Ultra 5’s higher per-core performance, driven by the newer 3 nm process and Arrow Lake architecture, more than compensates in most other tests.

Cache hierarchies also differ substantially. The Core 7 251TE has 80 KB of L1 cache per core, 1.25 MB of L2 cache per core, and 36 MB of shared L3 cache. The Core Ultra 5 245KF has 192 KB of L1 cache per core, 3 MB of L2 cache per core, and 24 MB of shared L3 cache. The Core Ultra 5 has larger per-core caches, which supports its higher single-thread performance. The Core 7 has more total L3 cache, which can benefit workloads with large shared data sets.

Clock speeds show a trade-off. The Core 7 251TE has a base clock of 1.40 GHz and a boost clock of 5.40 GHz. The Core Ultra 5 245KF has a higher base clock of 4.20 GHz but a slightly lower boost clock of 5.20 GHz. The Core Ultra 5’s much higher base clock is a key factor in its single-thread dominance, as it does not need to ramp up to reach competitive speeds. The Core 7’s lower base clock, paired with a higher boost clock, suggests a design that prioritizes power efficiency at idle and bursts to high frequencies when needed.

Memory support and platform features differ as well. The Core 7 251TE supports both DDR4 and DDR5 memory, while the Core Ultra 5 245KF supports only DDR5. Both use dual-channel memory buses, but the Core Ultra 5 has a higher memory bandwidth rating of 102.4 GB/s versus 89.6 GB/s for the Core 7. The Core 7 supports ECC memory, while the Core Ultra 5 does not. The Core 7 uses the Intel Socket 1700 platform, while the Core Ultra 5 uses the newer Intel Socket 1851. PCIe support also differs, with the Core Ultra 5 offering Gen 5 with 20 lanes (CPU only), while the Core 7 offers Gen 5 with 16 lanes (CPU only).

The integrated graphics situation is a major differentiator. The Core 7 251TE includes UHD Graphics 770, providing a built-in display output. The Core Ultra 5 245KF has no integrated graphics, listed as N/A. This means the Core Ultra 5 requires a discrete graphics card for any display output, while the Core 7 can operate in a headless configuration or with basic display capabilities without a dedicated GPU. The Core 7 has a TDP of 45 watts, while the Core Ultra 5 has a TDP of 125 watts, reflecting the Core Ultra 5’s higher power envelope and performance focus.

The Core Ultra 5 245KF has an unlocked multiplier, allowing for overclocking, while the Core 7 251TE does not. The Core Ultra 5 also has a more recent release date, arriving on 2024-10-23, while the Core 7 came later on 2025-01-12. The launch MSRP for the Core 7 251TE is $384, and for the Core Ultra 5 245KF it is $294.

The Verdict

The data points to a clear conclusion: the Intel Core Ultra 5 245KF is the faster processor in the vast majority of scenarios. Its 30.4% lead across all Cinebench tests, both multi-core and single-core, demonstrates superior rendering and general compute performance. The 24.3% lead in single-thread Passmark tests and the 66.3% lead in prime number finding confirm that its per-core efficiency is far ahead of the Core 7 251TE.

The Core 7 251TE’s 27.2% win in integer math is its only significant advantage. This suggests that workloads which are purely integer-based and scale exceptionally well with thread count may favor the Core 7. However, this single win does not offset the Core Ultra 5’s dominance in 16 other tests, including data compression, encryption, floating-point math, and physics simulations.

For users who require a processor for multi-threaded rendering, content creation, or general productivity, the Core Ultra 5 245KF is the superior choice based on the recorded data. Its higher memory bandwidth, larger per-core caches, and newer 3 nm process node all contribute to its performance lead. The Core 7 251TE, with its 45-watt TDP and integrated graphics, may be more suitable for specific power-constrained or embedded-style use cases, but its performance in the benchmarks is clearly lower.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Core 7 251TE has 24 cores and 32 threads, while the Intel Core Ultra 5 245KF has 14 cores and 14 threads.

Q: What is the largest performance gap in the head-to-head tests?

A: The largest gap is in the Passmark find prime numbers test, where the Core Ultra 5 245KF leads by 66.3%, scoring 416 versus 140.

Q: Does the Core 7 251TE win any benchmarks?

A: Yes, the Core 7 251TE wins the Passmark integer math test with a score of 125739, which is 27.2% higher than the Core Ultra 5’s 98854.

Q: Which processor supports ECC memory?

A: The Intel Core 7 251TE supports ECC memory, while the Intel Core Ultra 5 245KF does not.

Q: Do both processors have integrated graphics?

A: No, the Core 7 251TE includes UHD Graphics 770, while the Core Ultra 5 245KF has no integrated graphics (N/A).

Q: What is the difference in memory bandwidth?

A: The Core Ultra 5 245KF has a memory bandwidth of 102.4 GB/s, while the Core 7 251TE has a memory bandwidth of 89.6 GB/s.

Where Each One Wins

The Intel Core Ultra 5 245KF wins in rendering, encoding, and general compute tasks. Its Cinebench R23 multi-core score of 36647 is 30.4% higher than the Core 7’s 25518, indicating faster performance in 3D rendering and video encoding. Its single-core advantage is equally pronounced, with a 30.4% lead in Cinebench R23 single-core, making it the better option for applications with heavy single-threaded dependencies, such as older games or legacy software.

The Core Ultra 5 also dominates in data processing and security-related workloads. Its 33.6% lead in data encryption (33381 versus 22176) and 27.3% lead in data compression (460123 versus 334399) show that it handles common productivity tasks more efficiently. The 55.2% lead in extended instructions (37912 versus 16974) indicates strong performance in SIMD-heavy applications like scientific computing and multimedia processing.

The Intel Core 7 251TE wins in pure integer math, scoring 125739 versus 98854, a 27.2% advantage. This makes it the better choice for specific workloads that are heavily integer-based and scale well with high thread counts, such as certain types of financial modeling, integer-heavy cryptography, or specialized simulation software. Its higher thread count of 32 versus 14 is the likely reason for this win.

The Core 7 251TE also holds an advantage in power efficiency, with a TDP of 45 watts versus 125 watts for the Core Ultra 5. This makes it more suitable for systems where thermal output and power consumption are primary constraints. Additionally, the Core 7’s integrated UHD Graphics 770 provides a display output without a discrete GPU, which is a practical advantage for basic systems or troubleshooting scenarios, while the Core Ultra 5 requires a separate graphics card.

Specification Differences

The two processors differ in several key specifications. The Core 7 251TE uses the Bartlett Lake architecture on a 10 nm process node, while the Core Ultra 5 245KF uses the Arrow Lake architecture on a 3 nm process node. The Core 7 has 24 cores and 32 threads, while the Core Ultra 5 has 14 cores and 14 threads. The Core 7 has a base clock of 1.40 GHz and a boost clock of 5.40 GHz, while the Core Ultra 5 has a base clock of 4.20 GHz and a boost clock of 5.20 GHz.

The cache configurations differ, with the Core 7 offering 80 KB L1 and 1.25 MB L2 per core, and 36 MB shared L3, while the Core Ultra 5 offers 192 KB L1 and 3 MB L2 per core, and 24 MB shared L3. The Core 7 supports DDR4 and DDR5 memory, while the Core Ultra 5 supports only DDR5. The Core 7 has a memory bandwidth of 89.6 GB/s and supports ECC, while the Core Ultra 5 has 102.4 GB/s and does not support ECC. The Core 7 uses Socket 1700 and has 16 PCIe Gen 5 lanes, while the Core Ultra 5 uses Socket 1851 and has 20 PCIe Gen 5 lanes. The Core 7 includes UHD Graphics 770, while the Core Ultra 5 has no integrated graphics. The Core 7 has a TDP of 45 watts and is not multiplier unlocked, while the Core Ultra 5 has a TDP of 125 watts and is multiplier unlocked.