Intel Core Ultra 7 266V vs Intel Xeon 6333P Comparison

The Intel Xeon 6333P and Intel Core Ultra 7 266V are both active Intel processors, but they target entirely different segments. The Xeon 6333P is a 65W, 6-core/12-thread Raptor Lake-R part for servers and workstations with ECC memory support, while the Core Ultra 7 266V is a 17W, 8-core/8-thread Lunar Lake mobile chip with integrated Arc 140V graphics. Benchmark data shows the Core Ultra 7 266V wins 15 of 17 head-to-head tests, while the Xeon 6333P takes only two. However, the Xeon’s victories are decisive: a 47.9% lead in integer math and a 6.9% lead in data compression. Both CPUs sit at the 76th percentile among all CPUs, and their average benchmark scores are nearly identical (23,823 vs 23,297), yet their performance profiles are wildly different.

The Verdict

Choose the Intel Core Ultra 7 266V for almost any general-purpose or single-threaded workload. It wins every Cinebench test by a consistent 5.5-5.6% margin, from R15 multicore (1667 vs 1574) to R23 single-core (2335 vs 2204). It also dominates in encryption (13,822 vs 11,025, a 20.2% lead), extended instructions (15,928 vs 13,039, +18.1%), prime number finding (191 vs 83, a massive 56.5% advantage), and floating-point math (56,923 vs 43,801, +23.1%). With 8 cores and a 5.00 GHz boost clock on a 3nm TSMC process, the 266V is the clear all-rounder. Its 17W TDP also makes it the obvious choice for mobile or power-constrained systems.

Pick the Intel Xeon 6333P only if your workload is integer-heavy or compression-bound. Its 47.9% lead in PassMark integer math (61,458 vs 41,558) is the single largest performance gap in this comparison, and its 6.9% edge in data compression (199,886 vs 187,050) is the only other win. The Xeon also offers ECC memory support, which the Core Ultra lacks, making it the safer choice for mission-critical server tasks where data integrity matters more than raw speed. For a server chip, its 5.20 GHz boost clock and 18MB of shared L3 cache are notable, but they don’t translate into wins outside those two specific tests.

The data does not support picking the Xeon for mixed workloads. The Core Ultra 7 266V leads in multithread performance (19,461 vs 18,374, -5.6%), physics (1,608 vs 1,320, -17.9%), and random string sorting (22,905 vs 22,010, -3.9%). The Xeon’s 6 cores with 12 threads versus the 266V’s 8 cores with 8 threads explains part of the gap, but the 266V’s superior single-thread performance (3,943 vs 3,450, +12.5%) gives it the edge in most real-world scenarios. For a workstation user who needs ECC, the Xeon is the only option here; for everyone else, the Core Ultra 7 266V is the better buy.

FAQ

Q: Which CPU has more cores and threads?

A: The Intel Core Ultra 7 266V has 8 cores and 8 threads, while the Intel Xeon 6333P has 6 cores and 12 threads. The Xeon’s Hyper-Threading doubles its thread count, but the 266V has two more physical cores.

Q: What is the performance difference in Cinebench R23?

A: The Core Ultra 7 266V leads in both R23 tests: 16,544 vs 15,617 in multicore and 2,335 vs 2,204 in single-core, a 5.6% margin in each case.

Q: Which CPU supports ECC memory?

A: The Intel Xeon 6333P supports ECC memory. The Intel Core Ultra 7 266V does not, which may be a deciding factor for server or workstation reliability requirements.

Q: How do their average benchmark scores compare?

A: The Xeon 6333P averages 23,823, while the Core Ultra 7 266V averages 23,297. Both sit at the 76th percentile of all CPUs, and the Xeon’s nearest rival is the Intel Core i5-11500 (0.4% ahead), while the 266V’s nearest rival is the AMD Ryzen 7 5800H (0.1% ahead).

Q: Which CPU has the larger L3 cache?

A: The Xeon 6333P has 18MB of shared L3 cache, while the Core Ultra 7 266V has 12MB. However, the 266V has larger per-core L1 (192 KB vs 80 KB) and L2 (2.5 MB vs 1.25 MB) caches.

Q: What is the biggest single benchmark margin between the two?

A: The Xeon 6333P wins PassMark integer math by 47.9% (61,458 vs 41,558). The Core Ultra 7 266V’s largest win is in PassMark find prime numbers, where it leads by 56.5% (191 vs 83).

Architecture Differences

The two processors come from different Intel design philosophies. The Xeon 6333P uses Raptor Lake architecture on a 10nm Intel process node, with a die size of 163 mm². It is part of the Xeon 6 generation (Raptor Lake Refresh), a server/workstation line. The Core Ultra 7 266V uses Lunar Lake architecture on a 3nm TSMC process node, part of the Core Ultra Series 2 for mobile devices.

Cache organization differs significantly. The Xeon 6333P allocates 80 KB of L1 and 1.25 MB of L2 per core, plus 18MB of shared L3. The Core Ultra 7 266V has 192 KB of L1 and 2.5 MB of L2 per core, but only 12MB of shared L3. The 266V’s larger per-core caches likely contribute to its single-thread advantage, while the Xeon’s larger L3 helps in shared-data workloads.

Memory support also diverges. The Xeon 6333P supports both DDR4 and DDR5 in a dual-channel configuration, with ECC memory enabled. The Core Ultra 7 266V supports LPDDR5X (dependent on the motherboard) in dual-channel, with a memory bandwidth of 136.5 GB/s, but no ECC. PCIe lanes differ as well: the Xeon offers Gen 5 with 16 CPU-only lanes, while the 266V offers Gen 5 with just 4 CPU-only lanes.

Integrated graphics tell a clear story. The Xeon 6333P has no integrated GPU (N/A), while the Core Ultra 7 266V includes Arc 140V graphics. This makes the 266V a self-contained mobile solution, while the Xeon requires a discrete GPU.

Specification Differences

| Specification | Intel Xeon 6333P | Intel Core Ultra 7 266V |

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

| Cores | 6 | 8 |

| Threads | 12 | 8 |

| Base Clock | 3.10 GHz | 2.20 GHz |

| Boost Clock | 5.20 GHz | 5.00 GHz |

| TDP | 65W | 17W |

| Socket | Intel Socket 1700 | Intel BGA 2833 |

| Process Node | 10 nm (Intel) | 3 nm (TSMC) |

| L1 Cache | 80 KB (per core) | 192 KB (per core) |

| L2 Cache | 1.25 MB (per core) | 2.5 MB (per core) |

| L3 Cache | 18 MB (shared) | 12 MB (shared) |

| Memory Support | DDR4, DDR5 | LPDDR5X (depends on motherboard) |

| Memory Bandwidth | Not specified | 136.5 GB/s |

| ECC Memory | Yes | No |

| PCIe | Gen 5, 16 Lanes (CPU only) | Gen 5, 4 Lanes (CPU only) |

| Integrated Graphics | N/A | Arc 140V |

| Market Segment | Server/Workstation | Mobile |

| Release Date | 2025-02-23 | 2024-09-23 |

| Launch MSRP | $319 | Not specified |

Head-to-Head Benchmarks

The Core Ultra 7 266V dominates the Cinebench suite with a uniform 5.6% advantage across all tests. In R15 multicore, it scores 1667 vs 1574; in R15 single-core, 235 vs 222. R20 results show 6948 vs 6559 (multicore) and 980 vs 925 (single-core). R23 continues the trend: 16,544 vs 15,617 multicore and 2,335 vs 2,204 single-core. This consistency suggests the 266V’s architectural efficiency, not just its extra cores, drives the win.

PassMark results are more mixed and reveal distinct strengths. The Xeon 6333P’s 47.9% integer math win (61,458 vs 41,558) is its most dramatic victory, likely reflecting its server-oriented design. Its data compression win is smaller but still solid: 199,886 vs 187,050, a 6.9% margin. The Core Ultra 7 266V counters with a 56.5% blowout in find prime numbers (191 vs 83) and a 23.1% lead in floating-point math (56,923 vs 43,801).

Encryption and extended instructions favor the 266V heavily. The Core Ultra scores 13,822 vs 11,025 in data encryption (+20.2%) and 15,928 vs 13,039 in extended instructions (+18.1%). These gaps point to modern instruction-set advantages in the Lunar Lake design. The 266V also wins physics (1,608 vs 1,320, +17.9%), single-thread (3,943 vs 3,450, +12.5%), and multithread (19,461 vs 18,374, +5.6%) tests.

Random string sorting is a near-miss for the Xeon: 22,905 vs 22,010, a 3.9% win for the 266V. The Xeon’s only other close call is data compression, where it leads by 6.9%. Overall, the 266V’s 15 wins versus the Xeon’s 2 wins makes the head-to-head lopsided, but the Xeon’s integer math and compression dominance shows it is not without specialized merit.