Intel Core Ultra 5 245HX vs Intel Core Ultra 7 265T Comparison

Head-to-Head Benchmarks

The benchmark data presents an unusual split: the Intel Core Ultra 5 245HX wins 15 of 17 head-to-head comparisons, yet the Intel Core Ultra 7 265T claims the two most decisive victories. The most dramatic margin belongs to the Ultra 7 265T in Passmark integer math, where it scores 104,943 against the Ultra 5 245HX’s 92,150 — a 12.2% advantage. Floating point math also favors the Ultra 7 265T, with 129,817 versus 120,735, a 7% lead. These are substantial margins in raw computational throughput, suggesting the Ultra 7’s higher core count translates directly into arithmetic-heavy workloads.

The Ultra 5 245HX, however, dominates nearly everywhere else. In Cinebench R23 multicore, it scores 32,358 versus 31,558 — a 2.5% edge. The same 2.5% delta repeats across Cinebench R15 multicore (3,261 vs 3,180), R20 multicore (13,590 vs 13,254), and R23 singlecore (4,568 vs 4,455). Single-thread performance is consistently in the Ultra 5’s favor, with a 3.3% lead in Passmark single-thread (4,481 vs 4,338) and 2.4–2.5% advantages across all three Cinebench single-core tests. This pattern indicates the Ultra 5 245HX extracts more performance per clock despite having fewer cores.

The largest Ultra 5 wins come in specialized Passmark workloads. Find prime numbers shows an 11.5% gap (359 vs 322), extended instructions a 9.1% gap (31,212 vs 28,609), and random string sorting a 7.2% gap (47,616 vs 44,400). Data compression favors the Ultra 5 by 6.2% (393,071 vs 370,158), while physics and multithread tests show narrower 5.6% and 2.7% advantages respectively. Data encryption is the closest contest, with the Ultra 5 winning by just 1.1% (30,022 vs 29,687).

Overall average benchmark scores reflect this mixed picture: the Ultra 5 245HX averages 48,287 against the Ultra 7 265T’s 47,697, a 1.2% aggregate difference. Both processors sit at the 90th percentile among all CPUs. The Ultra 5’s nearest rivals include the Intel Core Ultra 5 235A (0.2% ahead) and the AMD Ryzen AI Max PRO 380 (0.2% ahead), while the Ultra 7 265T trades positions with the AMD Ryzen 9 7900X3D (0.4% behind) and AMD Ryzen 9 PRO 5945 (0.4% ahead). Neither chip dominates its competitive tier by a wide margin.

Architecture Differences

Both processors share the Arrow Lake architecture, TSMC’s 3 nm process node, 17,800 million transistors, and a 243 mm² die size. They also use identical per-core cache configurations: 192 KB L1 per core and 3 MB L2 per core. The divergence begins with core counts — the Ultra 7 265T packs 20 cores and 20 threads, while the Ultra 5 245HX offers 14 cores and 14 threads. Neither chip uses hyperthreading, so threads equal cores in both cases.

Shared L3 cache differs significantly: the Ultra 7 265T has 30 MB shared, whereas the Ultra 5 245HX has 24 MB shared. This 6 MB difference likely contributes to the Ultra 7’s integer and floating-point advantages, as larger shared caches reduce memory latency for data-intensive loops. Clock speeds also favor the Ultra 7 in boost: 5.30 GHz versus 5.10 GHz, though the Ultra 5 counters with a much higher base clock of 3.10 GHz versus 1.50 GHz. The Ultra 5’s higher base clock explains its consistent single-thread and lightly threaded advantages — it starts at a much higher frequency and only needs to boost modestly.

Socket and market segment diverge sharply. The Ultra 5 245HX uses Intel BGA 2114, a mobile socket, and targets the mobile segment. The Ultra 7 265T uses Intel Socket 1851, a desktop socket, and targets desktops. Thermal design power reflects this: the Ultra 5 draws 55W TDP versus the Ultra 7’s 35W TDP. The Ultra 5’s higher TDP in a mobile package suggests it is tuned for sustained performance in larger laptops, while the Ultra 7’s lower TDP suits desktop cooling constraints.

Integrated graphics differ in execution unit count: the Ultra 5 245HX carries Arc Xe-LPG Graphics with 48 EU, while the Ultra 7 265T has 64 EU. Both support DDR5 memory on a dual-channel bus with 102.4 GB/s bandwidth and PCIe Gen 5 with 20 CPU lanes. Neither supports ECC memory. The Ultra 5 has an unlocked multiplier; the Ultra 7 does not. Release dates are close, with the Ultra 7 launching on 2025-01-06 and the Ultra 5 on 2025-01-12. The Ultra 7 265T has a launch MSRP of $384.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Core Ultra 7 265T has 20 cores and 20 threads, while the Intel Core Ultra 5 245HX has 14 cores and 14 threads. Neither supports hyperthreading.

Q: Why does the Ultra 5 245HX win most benchmarks despite having fewer cores?

A: The Ultra 5 245HX has a 3.10 GHz base clock versus the Ultra 7 265T’s 1.50 GHz. Its single-thread benchmark wins (2.4–3.3% across Cinebench and Passmark) indicate higher per-core efficiency, likely driven by this base clock advantage.

Q: In which workloads does the Ultra 7 265T outperform the Ultra 5 245HX?

A: The Ultra 7 265T wins Passmark integer math by 12.2% and floating-point math by 7%. These are the only two head-to-head tests it wins, out of 17 total.

Q: How do their shared caches compare?

A: The Ultra 7 265T has 30 MB shared L3 cache, while the Ultra 5 245HX has 24 MB. Both have 192 KB L1 per core and 3 MB L2 per core.

Q: Are these processors built on the same manufacturing process?

A: Yes, both use TSMC’s 3 nm process node with 17,800 million transistors on a 243 mm² die. They share the same Arrow Lake architecture and foundry.

Q: What is the TDP difference and what does it imply?

A: The Ultra 5 245HX has a 55W TDP, while the Ultra 7 265T has a 35W TDP. The Ultra 5’s higher TDP likely enables its higher base clock, while the Ultra 7’s lower TDP suits its desktop socket design.

Specification Differences

| Field | Intel Core Ultra 5 245HX | Intel Core Ultra 7 265T |

|-------|--------------------------|--------------------------|

| Cores | 14 | 20 |

| Threads | 14 | 20 |

| Base Clock | 3.10 GHz | 1.50 GHz |

| Boost Clock | 5.10 GHz | 5.30 GHz |

| TDP | 55W | 35W |

| Socket | Intel BGA 2114 | Intel Socket 1851 |

| Codename | Arrow Lake-HX | Arrow Lake-S |

| Generation | Ultra 5 (Arrow Lake-HX) | Ultra 7 (Arrow Lake) |

| L3 Cache | 24 MB shared | 30 MB shared |

| Integrated Graphics | Arc Xe-LPG 48EU | Arc Xe-LPG 64EU |

| Market Segment | Mobile | Desktop |

| Release Date | 2025-01-12 | 2025-01-06 |

| Multiplier Unlocked | Yes | No |

| Part Number | SRVFM | SRQCS |

| Launch MSRP | Not available | $384 |

The Verdict

The data paints two distinct profiles. The Intel Core Ultra 5 245HX is the better all-round performer, winning 15 of 17 benchmarks and holding a 1.2% average score advantage. Its strengths are broad: single-thread work (3.3% ahead in Passmark single-thread), compression (6.2%), extended instructions (9.1%), and prime number finding (11.5%). For users running Cinebench-style rendering, encryption, or general productivity tasks, the Ultra 5 245HX is the data-backed choice.

The Intel Core Ultra 7 265T, despite losing most comparisons, wins precisely where core count matters most: integer math (12.2% ahead) and floating-point math (7% ahead). These are the workloads that scale with parallel execution units and large shared caches. Its 30 MB L3 cache and 20 cores provide a structural advantage for heavily parallel arithmetic, even though its 1.50 GHz base clock drags down single-thread and lightly threaded scores.

The market segments reinforce this split. The Ultra 5 245HX, with its 55W TDP and mobile BGA socket, targets high-performance laptops where sustained multi-thread throughput and strong single-core response are both required. The Ultra 7 265T, at 35W TDP and desktop Socket 1851, fits compact desktop builds where power efficiency matters more than peak frequency. Its locked multiplier also signals a mainstream, non-overclocking audience.

Neither processor is a clear winner for all workloads. The Ultra 5 245HX is the safer pick for general use, offering better single-thread performance, higher base frequency, and wins across 15 of 17 tests. The Ultra 7 265T is the specialized choice for integer- and floating-point-heavy computations, where its 20 cores and larger L3 cache deliver decisive margins despite losing everywhere else. The 90th-percentile ranking for both confirms that either chip sits comfortably above most CPUs, but users should match the workload to the silicon.