Intel Core 7 251TE vs Intel Core Ultra 3 205 Comparison

Intel Core 7 251TE and Intel Core Ultra 3 205 are both active desktop processors from Intel, but they target very different workloads. The Core 7 251TE is a 24-core Bartlett Lake part on Socket 1700 with a 45 W TDP, while the Core Ultra 3 205 is an 8-core Arrow Lake-S part on Socket 1851 with a 57 W TDP. The benchmark data shows a clear split: the 251TE dominates multi-threaded and integer-heavy tasks, while the 205 wins in single-threaded PassMark tests and certain instruction-heavy workloads. This analysis covers the architectural differences, benchmark results, and practical implications based solely on the recorded data.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Core 7 251TE has 24 cores and 32 threads. The Intel Core Ultra 3 205 has 8 cores and 8 threads.

Q: What are the boost clock speeds of each CPU?

A: The Core 7 251TE boosts to 5.40 GHz, while the Core Ultra 3 205 boosts to 4.90 GHz. The base clocks are 1.40 GHz and 3.80 GHz respectively.

Q: Which CPU has the larger L3 cache?

A: The Core 7 251TE has 36 MB of shared L3 cache. The Core Ultra 3 205 has 15 MB of shared L3 cache.

Q: How much memory bandwidth does each support?

A: The Core 7 251TE supports 89.6 GB/s, and the Core Ultra 3 205 supports 102.4 GB/s. Both use dual-channel memory buses.

Q: Which processor supports ECC memory?

A: The Core 7 251TE supports ECC memory. The Core Ultra 3 205 does not support ECC memory.

Q: What is the average benchmark score difference?

A: The Core 7 251TE has an average benchmark score of 41650, placing it in the 88th percentile. The Core Ultra 3 205 has an average score of 31473, placing it in the 82nd percentile. That is a 32.3% higher average score for the 251TE based on the recorded averages.

Architecture Differences

The two processors come from different Intel families and manufacturing processes. The Core 7 251TE is based on Bartlett Lake, built on a 10 nm process at Intel's foundry, with a die size of 215 mm². The Core Ultra 3 205 uses the Arrow Lake architecture, built on a 3 nm process at TSMC, with a die size of 243 mm² and 17,800 million transistors. The Core Ultra 3 205 is part of the Core Ultra Series 2.

Core configuration differs substantially. The 251TE has 24 cores and 32 threads, indicating a hybrid layout with efficiency cores. The 205 has 8 cores and 8 threads, a simpler configuration without hyper-threading. Cache hierarchies also differ: the 251TE uses 80 KB L1 and 1.25 MB L2 per core, with 36 MB shared L3. The 205 uses larger per-core caches: 192 KB L1 and 3 MB L2, but only 15 MB shared L3.

Memory support diverges. The 251TE supports both DDR4 and DDR5, while the 205 supports only DDR5. ECC memory is available on the 251TE but not on the 205. PCIe lanes also differ: the 251TE has Gen 5 with 16 CPU lanes, while the 205 has Gen 5 with 20 CPU lanes. Integrated graphics differ as well: the 251TE uses UHD Graphics 770, while the 205 uses Arc Xe-LPG Graphics 16EU.

Process node and foundry choices lead to different transistor densities and power characteristics. The 205's 3 nm TSMC process is more advanced than the 251TE's 10 nm Intel process, which may explain the 205's higher base clock of 3.80 GHz versus 1.40 GHz. However, the 251TE achieves a higher boost clock of 5.40 GHz versus 4.90 GHz. The 205 has a higher TDP at 57 W versus 45 W for the 251TE.

The Verdict

The data indicates the Core 7 251TE is the stronger overall performer for multi-threaded workloads. It wins 12 of 17 head-to-head benchmarks, including all Cinebench tests and most PassMark tests. Its 24 cores and 32 threads deliver a 28.5% advantage in Cinebench R23 multi-core, scoring 25518 versus 19856. The 251TE also leads in integer math by 129.6%, scoring 125739 versus 54755. For users running rendering, compilation, or data processing tasks, this processor is the clear choice based on the recorded scores.

The Core Ultra 3 205 wins 5 of 17 benchmarks, concentrated in single-thread and specific instruction tests. It leads in PassMark single-thread with 4575 versus 3568, a 22% advantage. It also wins extended instructions (22578 versus 16974, a 24.8% edge), find prime numbers (268 versus 140, a 47.8% edge), and physics (2016 versus 1938, a 3.9% edge). These wins suggest the 205 handles certain scalar or instruction-heavy tasks more efficiently per core, despite having fewer cores.

For users prioritizing raw multi-threaded throughput, the 251TE is the pick. For users who need strong single-thread performance or specific instruction set efficiency, the 205 has merit. The 205 also offers newer PCIe Gen 5 with 20 lanes and higher memory bandwidth at 102.4 GB/s versus 89.6 GB/s. The choice depends on workload mix: the 251TE for parallel compute, the 205 for single-thread responsiveness.

Specification Differences

The following fields differ between the two processors, based on the recorded data:

• Cores: 24 (251TE) vs 8 (205)
• Threads: 32 (251TE) vs 8 (205)
• Base clock: 1.40 GHz (251TE) vs 3.80 GHz (205)
• Boost clock: 5.40 GHz (251TE) vs 4.90 GHz (205)
• TDP: 45 W (251TE) vs 57 W (205)
• Socket: Intel Socket 1700 (251TE) vs Intel Socket 1851 (205)
• Codename: Bartlett Lake (251TE) vs Arrow Lake-S (205)
• Process node: 10 nm (251TE) vs 3 nm (205)
• Foundry: Intel (251TE) vs TSMC (205)
• Die size: 215 mm² (251TE) vs 243 mm² (205)
• Transistors: not listed (251TE) vs 17,800 million (205)
• L1 cache: 80 KB per core (251TE) vs 192 KB per core (205)
• L2 cache: 1.25 MB per core (251TE) vs 3 MB per core (205)
• L3 cache: 36 MB shared (251TE) vs 15 MB shared (205)
• Memory support: DDR4, DDR5 (251TE) vs DDR5 (205)
• Memory bandwidth: 89.6 GB/s (251TE) vs 102.4 GB/s (205)
• ECC memory: true (251TE) vs false (205)
• PCIe: Gen 5, 16 Lanes (251TE) vs Gen 5, 20 Lanes (205)
• Integrated graphics: UHD Graphics 770 (251TE) vs Arc Xe-LPG Graphics 16EU (205)
• Release date: 2025-01-12 (251TE) vs 2025-07-31 (205)
• Launch MSRP: $384 (251TE) vs $140 (205)
• Part number: SRQAXQ5ZG (251TE) vs SRVFC (205)

Head-to-Head Benchmarks

The Core 7 251TE dominates the Cinebench suite. In Cinebench R15 multi-core, it scores 2572 versus 2001, a 28.5% lead. Single-core R15 shows 362 versus 282, also 28.4% ahead. R20 multi-core is 10717 versus 8339, a 28.5% edge, and R20 single-core is 1512 versus 1177, again 28.5%. R23 multi-core delivers 25518 versus 19856, and R23 single-core is 3602 versus 2803, both 28.5% ahead. These consistent margins indicate the 251TE has a broad clock and core advantage in Cinebench workloads.

PassMark tests show a mixed picture. The 251TE wins data compression with 334399 versus 260651, a 28.3% edge. Data encryption also favors the 251TE: 22176 versus 18772, an 18.1% lead. Integer math is the largest win for the 251TE at 129.6% (125739 versus 54755). Floating point math goes to the 251TE with 85607 versus 75136, a 13.9% margin. Multithread score is 30022 versus 26167, a 14.7% win. Random string sorting is 39643 versus 31083, a 27.5% edge.

The Core Ultra 3 205 wins in specific PassMark categories. Extended instructions show 22578 versus 16974, a 24.8% advantage for the 205. Find prime numbers is 268 versus 140, a 47.8% lead. Physics is close: 2016 versus 1938, a 3.9% edge. Single-thread and singlethread tests both show 4575 versus 3568, a 22% win for the 205.

The win count is lopsided: 12 for the 251TE, 5 for the 205. However, the 205's wins are notable for their magnitude in single-thread and instruction-specific tasks. The 251TE's wins in integer math and multi-thread tests are larger in absolute delta, indicating its core count is decisive for parallel workloads.

Where Each One Wins

The Core 7 251TE wins in all multi-threaded rendering benchmarks. Cinebench R15, R20, and R23 multi-core all show a 28.5% advantage. This confirms the 251TE is the better choice for CPU-bound rendering, video encoding, and other tasks that scale with core count. Its 24 cores and 32 threads provide substantial parallelism that the 205's 8 cores cannot match.

The 251TE also wins in integer math by a massive 129.6% margin. This indicates strong performance for integer-heavy compute, such as database operations or certain scientific calculations. Data compression and encryption also favor the 251TE, with 28.3% and 18.1% leads respectively. These are common server or workstation tasks where the 251TE's thread count helps.

Random string sorting goes to the 251TE by 27.5%, and floating point math by 13.9%. The multithread PassMark score confirms the overall parallel advantage at 14.7%. For users running multiple virtual machines, compiling code, or processing large datasets, the 251TE is the stronger part.

The Core Ultra 3 205 wins in single-thread PassMark tests by 22%, scoring 4575 versus 3568. This indicates better per-core single-thread performance, useful for lightly threaded applications like older games or single-threaded scripts. The 205 also wins find prime numbers by 47.8%, a specific instruction-heavy test that shows its efficiency with certain algorithms.

Extended instructions favor the 205 by 24.8%, suggesting better support for modern instruction sets like AVX-512 or similar extensions. Physics simulation also edges toward the 205 with a 3.9% lead, though this margin is small. For users running physics-based simulations or single-threaded workloads, the 205 offers a measurable advantage.

The 205 also has a higher memory bandwidth at 102.4 GB/s versus 89.6 GB/s, and more PCIe lanes at 20 versus 16. These features may benefit memory-intensive or I/O-heavy tasks, even though the core count is lower. The 205's newer 3 nm process and higher base clock of 3.80 GHz contribute to its single-thread efficiency.

In summary, the 251TE is the winner for multi-threaded throughput and integer-heavy workloads. The 205 is the winner for single-thread performance and certain instruction-specific tasks. The choice comes down to whether the workload is parallel or scalar in nature.