Intel Core Ultra 5 245K vs Intel Xeon 6505P Comparison

The Intel Core Ultra 5 245K and Intel Xeon 6505P occupy opposite ends of the hardware spectrum, yet their average benchmark scores sit remarkably close. The Core Ultra 5 245K averages 54,053 points, while the Xeon 6505P averages 53,701, a gap of just 0.7%. This near-parity is deceptive, as a granular look at the head-to-head results reveals two very different performance profiles that favor each processor in distinct workloads.

Head-to-Head Benchmarks

The Core Ultra 5 245K secures 12 wins out of 17 head-to-head tests, but the Xeon 6505P's victories are decisive in their own right. The most striking single-core result appears in Cinebench R23, where the Xeon 6505P scores 4,614 versus the Core Ultra's 2,132, a 53.8% advantage. This pattern repeats in Cinebench R15 single-core, where the Xeon leads 464 to 322, a 30.6% margin. The PassMark single-thread test tells the opposite story, however, with the Core Ultra winning 4,714 to 3,187, a 47.9% lead. The data suggests these processors were optimized for different interpretations of single-threaded performance.

In multi-core workloads, the results are split along generation lines. The Core Ultra 5 245K wins Cinebench R15 multicore with 3,850 versus 3,294 (16.9% lead) and Cinebench R20 multicore with 15,368 versus 13,728 (11.9% lead). Yet the Xeon 6505P dominates Cinebench R23 multicore, posting 32,687 against 25,066, a 23.3% advantage. This inversion across Cinebench versions highlights how the Xeon's 24 threads can overwhelm the Core Ultra's 14 threads in sustained rendering workloads, even as the Core Ultra handles shorter multi-core bursts more effectively.

The PassMark suite further clarifies the divide. The Core Ultra 5 245K crushes the Xeon in floating-point math, scoring 130,678 versus 92,992, a 40.5% margin, and in find prime numbers, 414 versus 217, a 90.8% blowout. Data encryption also favors the Core Ultra by 36.1% (33,286 versus 24,458). Meanwhile, the Xeon 6505P wins integer math decisively, 120,456 to 98,524 (18.2% lead), and data compression by 4.5% (480,368 versus 458,817). The Xeon's eight-channel memory subsystem likely explains its compression and integer strength, but the Core Ultra's newer architecture handles encryption and floating-point operations with far greater efficiency.

FAQ

Q: Which processor has the higher average benchmark score?

A: The Intel Core Ultra 5 245K averages 54,053 points, while the Intel Xeon 6505P averages 53,701 points. The Core Ultra leads by 0.7%, placing both in the 91st percentile of all CPUs.

Q: Why does the Xeon 6505P win Cinebench R23 multicore but lose Cinebench R15 multicore?

A: The Xeon 6505P scores 32,687 in Cinebench R23 multicore versus 25,066 for the Core Ultra 5 245K, a 23.3% advantage. However, in Cinebench R15 multicore, the Core Ultra wins 3,850 to 3,294, a 16.9% lead. The Xeon's 24 threads outperform in the longer, more demanding R23 workload, while the Core Ultra's 14 faster cores handle the shorter R15 test better.

Q: Is the Xeon 6505P faster in every single-core test?

A: No. The Xeon 6505P wins Cinebench R15 single-core (464 versus 322, up 30.6%) and Cinebench R23 single-core (4,614 versus 2,132, up 53.8%). However, in PassMark single-thread, the Core Ultra 5 245K wins decisively with 4,714 versus 3,187, a 47.9% advantage.

Q: How do the two processors compare in memory bandwidth?

A: The Xeon 6505P features an eight-channel memory bus delivering 409.6 GB/s of bandwidth, versus the Core Ultra 5 245K's dual-channel 102.4 GB/s. This fourfold difference likely drives the Xeon's wins in data compression and integer math.

Q: Which processor offers better integrated graphics?

A: The Core Ultra 5 245K includes Arc Xe-LPG Graphics with 64 execution units, while the Xeon 6505P has no integrated graphics (N/A). The Core Ultra is therefore suitable for systems without a discrete GPU, whereas the Xeon requires one.

Q: What are the TDP differences between the two?

A: The Core Ultra 5 245K has a TDP of 125 watts, while the Xeon 6505P has a TDP of 150 watts. The Xeon draws more power despite having fewer cores, reflecting its server-oriented design and higher memory bandwidth.

Architecture Differences

The Core Ultra 5 245K uses Intel's Arrow Lake architecture on a 3nm process node fabricated by TSMC, while the Xeon 6505P relies on Granite Rapids on Intel's 5nm node. This process gap explains why the Core Ultra achieves higher clock speeds—5.20 GHz boost versus 4.10 GHz—while consuming less power. The Core Ultra's die size measures 243 mm² with 17,800 million transistors, whereas the Xeon's die dimensions and transistor count are not listed in the data.

Cache configurations differ substantially. The Core Ultra 5 245K allocates 192 KB of L1 per core, 3 MB of L2 per core, and 24 MB of shared L3 cache. The Xeon 6505P provides 112 KB of L1 per core, 2 MB of L2 per core, and 48 MB of shared L3. The Xeon's L3 cache is double the Core Ultra's, which aids in server workloads with large working sets, though the Core Ultra's per-core L1 and L2 are larger.

The processors also diverge in socket and platform. The Core Ultra 5 245K fits Intel Socket 1851 with 20 PCIe Gen 5 lanes, while the Xeon 6505P uses Intel Socket 4710 with 88 PCIe Gen 5 lanes. This makes the Xeon far more suitable for multi-GPU or high-expansion server configurations. The Core Ultra 5 245K has an unlocked multiplier, enabling overclocking, whereas the Xeon 6505P is locked. The Core Ultra also integrates graphics, which the Xeon lacks entirely.

Specification Differences

| Specification | Intel Core Ultra 5 245K | Intel Xeon 6505P |

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

| Cores | 14 | 12 |

| Threads | 14 | 24 |

| Base Clock | 4.20 GHz | 2.20 GHz |

| Boost Clock | 5.20 GHz | 4.10 GHz |

| TDP | 125 W | 150 W |

| Socket | Intel Socket 1851 | Intel Socket 4710 |

| Process Node | 3 nm (TSMC) | 5 nm (Intel) |

| L1 Cache | 192 KB per core | 112 KB per core |

| L2 Cache | 3 MB per core | 2 MB per core |

| L3 Cache | 24 MB shared | 48 MB shared |

| Memory Bus | Dual-channel | Eight-channel |

| Memory Bandwidth | 102.4 GB/s | 409.6 GB/s |

| PCIe Lanes | 20 (Gen 5) | 88 (Gen 5) |

| Integrated Graphics | Arc Xe-LPG 64EU | N/A |

| Market Segment | Desktop | Server/Workstation |

| Launch MSRP | $319 | $563 |

| Multiplier | Unlocked | Locked |

The Verdict

The data presents a clear choice based on workload type. The Core Ultra 5 245K wins 12 of 17 head-to-head tests, including all PassMark tests except data compression and integer math. It excels in floating-point math (40.5% ahead), data encryption (36.1% ahead), and find prime numbers (90.8% ahead). For desktop users, content creators, and general computing, the Core Ultra 5 245K offers superior single-thread performance in PassMark (4,714 versus 3,187) and a lower TDP of 125 watts versus 150 watts.

The Xeon 6505P, despite losing most head-to-head battles, wins where it matters for server workloads. Its 48 MB of L3 cache and 409.6 GB/s memory bandwidth deliver dominance in Cinebench R23 multicore (32,687 versus 25,066) and integer math (120,456 versus 98,524). The Xeon's 24 threads outperform the Core Ultra's 14 in sustained multi-threaded rendering, and its 88 PCIe lanes enable massive expansion. The Xeon also launched at $563, versus $319 for the Core Ultra, reflecting its enterprise positioning.

Neither processor is universally superior. The Core Ultra 5 245K is the better choice for desktop workloads, overclocking, and tasks that favor floating-point or encryption. The Xeon 6505P is the better choice for server environments, memory-bandwidth-intensive applications, and workloads that leverage high thread counts.

Where Each One Wins

Intel Core Ultra 5 245K wins in:

• Floating-point math (130,678 versus 92,992, up 40.5%)
• Data encryption (33,286 versus 24,458, up 36.1%)
• Find prime numbers (414 versus 217, up 90.8%)
• PassMark single-thread (4,714 versus 3,187, up 47.9%)
• Cinebench R15 multicore (3,850 versus 3,294, up 16.9%)
• Cinebench R20 multicore (15,368 versus 13,728, up 11.9%)
• PassMark multithread (43,047 versus 38,456, up 11.9%)
• Extended instructions (37,617 versus 37,515, up 0.3%)
• Random string sorting (55,098 versus 52,372, up 5.2%)
• Physics (3,081 versus 2,991, up 3%)

Intel Xeon 6505P wins in:

• Cinebench R23 multicore (32,687 versus 25,066, up 23.3%)
• Cinebench R23 single-core (4,614 versus 2,132, up 53.8%)
• Cinebench R15 single-core (464 versus 322, up 30.6%)
• Integer math (120,456 versus 98,524, up 18.2%)
• Data compression (480,368 versus 458,817, up 4.5%)

The Xeon's single-core wins in Cinebench are puzzling given its lower boost clock of 4.10 GHz versus 5.20 GHz. The data implies the Xeon's architecture prioritizes sustained single-thread performance under load, while the Core Ultra's PassMark single-thread victory indicates better burst performance. Users should choose based on the specific benchmark suite that mirrors their applications. The Core Ultra 5 245K is a desktop powerhouse, while the Xeon 6505P is a server workhorse with specialized strengths.