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

Intel Core 7 251TE and Intel Core Ultra 5 245K represent two distinct approaches to desktop processing, with the former using a high-core-count hybrid design on an older socket and the latter using a newer, more efficient architecture. The benchmark data reveals a clear split between single-threaded legacy performance and modern multi-threaded throughput. The Core Ultra 5 245K wins 13 of 17 head-to-head comparisons, while the Core 7 251TE takes 4 decisive victories, primarily in legacy single-core tests and one integer workload. The following analysis walks through the recorded measurements to determine which processor suits specific workloads.

Head-to-Head Benchmarks

The most striking result in the database is the Cinebench R23 single-core test. The Core 7 251TE scores 3602, which is 68.9% higher than the Core Ultra 5 245K’s 2132. This is the largest margin of victory for the Core 7 in any benchmark. The Core 7 also wins the Cinebench R15 single-core test with 362 versus 322, a 12.4% advantage. These results indicate that the Core 7 251TE retains superior legacy single-thread performance, likely due to its higher boost clock of 5.40 GHz compared to 5.20 GHz on the Core Ultra 5.

The Core Ultra 5 245K dominates the multi-core Cinebench tests. In Cinebench R15 multi-core, the Ultra 5 scores 3850 against the Core 7’s 2572, a 33.2% deficit for the Core 7. The R20 multi-core test shows a similar pattern: 15368 for the Ultra 5 versus 10717 for the Core 7, a 30.3% gap. However, the Cinebench R23 multi-core test flips the script. Here, the Core 7 251TE edges ahead with 25518 versus 25066, a slim 1.8% lead. This suggests that the Core 7’s 24 cores and 32 threads can hold their own in longer, more demanding render workloads, despite losing in the shorter R15 and R20 runs.

PassMark results heavily favor the Core Ultra 5 245K. The data compression test shows the Ultra 5 at 458817 versus 334399 for the Core 7, a 27.1% difference. Data encryption follows suit: 33286 versus 22176, a 33.4% gap. The extended instructions test is a blowout, with the Ultra 5 scoring 37617 against 16974, a 54.9% deficit for the Core 7. Prime number finding shows the largest relative gap: 414 versus 140, a 66.2% difference. Floating-point math also goes to the Ultra 5, 130678 versus 85607, a 34.5% margin.

The Core 7 251TE does win one PassMark workload: integer math. It scores 125739, which is 27.6% higher than the Ultra 5’s 98524. This is the only PassMark test where the Core 7 comes out ahead. The multithread test shows the Ultra 5 winning with 43047 versus 30022, a 30.3% advantage. Physics simulation also favors the Ultra 5, 3081 versus 1938, a 37.1% gap. Random string sorting goes to the Ultra 5, 55098 versus 39643, a 28.1% margin. Single-thread PassMark scores show the Ultra 5 ahead at 4714 versus 3568, a 24.3% lead.

Overall, the average benchmark score tells the story: the Core Ultra 5 245K averages 54053, placing it in the 91st percentile of all CPUs. The Core 7 251TE averages 41650, placing it in the 88th percentile. The nearest rivals for the Core 7 include the Intel Core Ultra 7 265H with a 0.1% lower score and the Intel Core i7-14700T with a 0.6% higher score. The Ultra 5’s nearest rivals include the Intel Xeon 6505P at 0.7% lower and the AMD Ryzen 9 9900X3D at 1.3% higher.

The Verdict

Benchmark results indicate that the Intel Core Ultra 5 245K is the stronger overall processor for modern multi-threaded workloads. It wins 13 of 17 tests and holds a 29.8% higher average benchmark score (54053 versus 41650). The Core Ultra 5 also sits in the 91st percentile versus the 88th for the Core 7, confirming its higher standing in the database. For users running contemporary rendering, compression, encryption, or physics workloads, the data consistently favors the Ultra 5.

The Intel Core 7 251TE is not without merit. Its Cinebench R23 multi-core score of 25518 beats the Ultra 5’s 25066, and its single-core R23 score of 3602 is 68.9% higher. The Core 7 also wins integer math by 27.6%. These wins suggest that the Core 7 excels in specific legacy applications that rely on high clock speeds and older instruction paths. However, the Core 7’s 45 TDP versus the Ultra 5’s 125 TDP indicates a more power-efficient design, though the database does not provide wattage measurements.

The verdict is clear: the Core Ultra 5 245K is the better all-round processor for most users. Its wins in data encryption, extended instructions, and floating-point math show a wider capability range. The Core 7 251TE is a niche pick for those who prioritize legacy single-thread performance and can tolerate lower multi-thread scores in most tests.

Where Each One Wins

The Intel Core Ultra 5 245K wins in every category where modern instruction sets matter. Data compression, encryption, and extended instructions all show the Ultra 5 ahead by 27% to 55%. This makes it the choice for file archiving, secure communication, and scientific computing that uses AVX-512 or similar extensions. Floating-point math and physics simulation also go to the Ultra 5, indicating strength in simulation and 3D modeling. The multithread test result of 43047 versus 30022 shows that the Ultra 5 handles concurrent threads more effectively in PassMark’s aggregate workload.

The Intel Core 7 251TE wins in Cinebench R23 multi-core by 1.8%, which is a narrow but notable margin. This suggests that in sustained render workloads lasting minutes, the Core 7’s higher core count (24 versus 14) and thread count (32 versus 14) can overcome the Ultra 5’s architectural advantages. The Core 7 also wins integer math by 27.6%, indicating strength in arithmetic-heavy applications that use integer operations. Legacy single-core tests (Cinebench R15 and R23) are clear wins for the Core 7, with margins of 12.4% and 68.9% respectively.

For users who run older software optimized for single high-frequency cores, the Core 7 251TE is the better option. For users who run modern multi-threaded applications, the Core Ultra 5 245K is superior. The data does not support the Core 7 for mixed workloads, as it loses in 13 of 17 tests.

FAQ

Q: Which processor has the higher boost clock?

A: The Intel Core 7 251TE has a boost clock of 5.40 GHz, while the Intel Core Ultra 5 245K has a boost clock of 5.20 GHz.

Q: What is the core and thread count difference?

A: The Core 7 251TE has 24 cores and 32 threads, while the Core Ultra 5 245K has 14 cores and 14 threads. The Core 7 has no hyperthreading advantage per core, but its physical core count is higher.

Q: Which processor wins the Cinebench R23 single-core test?

A: The Core 7 251TE wins with a score of 3602, which is 68.9% higher than the Core Ultra 5 245K’s 2132.

Q: How does the average benchmark score compare?

A: The Core Ultra 5 245K averages 54053, while the Core 7 251TE averages 41650. The Ultra 5 is 29.8% higher.

Q: Which processor has higher memory bandwidth?

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

Q: Does the Core 7 251TE support DDR4 memory?

A: Yes, the Core 7 251TE supports both DDR4 and DDR5, while the Core Ultra 5 245K supports only DDR5.

Architecture Differences

The two processors use fundamentally different manufacturing and design approaches. The Intel Core 7 251TE is built on a 10 nm process node at Intel’s foundry, with a die size of 215 mm². Its codename is Bartlett Lake, and it belongs to the Core 7 generation. The Core Ultra 5 245K uses a 3 nm process node at TSMC, with a die size of 243 mm². Its architecture is Arrow Lake, with the codename Arrow Lake-S, part of the Core Ultra Series 2. The process node difference is significant: 10 nm versus 3 nm, which explains the Ultra 5’s higher transistor density despite a larger die.

The Core Ultra 5 245K has 17,800 million transistors, while the Core 7 251TE does not list a transistor count in the database. Cache hierarchies differ substantially. The Core 7 has 80 KB of L1 cache per core, 1.25 MB of L2 per core, and 36 MB of shared L3. The Core Ultra 5 has 192 KB of L1 per core, 3 MB of L2 per core, and 24 MB of shared L3. The Ultra 5’s larger per-core caches likely contribute to its single-thread PassMark win (4714 versus 3568), despite its lower boost clock.

Integrated graphics differ as well. The Core 7 uses UHD Graphics 770, while the Core Ultra 5 uses Arc Xe-LPG Graphics 64EU. The Ultra 5 also has an unlocked multiplier, allowing overclocking, while the Core 7 does not. The sockets are incompatible: the Core 7 uses Intel Socket 1700, and the Ultra 5 uses Intel Socket 1851.

Specification Differences

The launch MSRP for the Core 7 251TE is $384, and for the Core Ultra 5 245K it is $319. The Core 7 has a base clock of 1.40 GHz and a boost clock of 5.40 GHz, while the Ultra 5 has a base clock of 4.20 GHz and a boost clock of 5.20 GHz. The Core 7 has a TDP of 45 watts, and the Ultra 5 has a TDP of 125 watts.

Memory support differs: the Core 7 supports DDR4 and DDR5, while the Ultra 5 supports only DDR5. Both use dual-channel memory, but memory bandwidth is higher on the Ultra 5 (102.4 GB/s versus 89.6 GB/s). Both support ECC memory. PCIe lanes differ: the Core 7 has Gen 5 with 16 lanes (CPU only), while the Ultra 5 has Gen 5 with 20 lanes (CPU only).

The Core 7 251TE has a part number of SRQAXQ5ZG and a release date of 2025-01-12. The Core Ultra 5 245K has a part number of SRQCT and a release date of 2024-10-23. Both are active production parts for the desktop market. The Core 7 has 24 cores and 32 threads, while the Ultra 5 has 14 cores and 14 threads, meaning the Ultra 5 does not use hyperthreading. The Core 7’s lower TDP and higher core count make it a power-efficient choice, while the Ultra 5’s higher TDP and newer process node deliver greater multi-threaded performance in most tests.