Intel Core i9-14900T vs Intel Xeon 6505P Comparison

The Intel Xeon 6505P and the Intel Core i9-14900T represent two very different design philosophies from the same manufacturer. The Xeon 6505P is a Granite Rapids server/workstation processor built on a 5 nm process, while the i9-14900T is a Raptor Lake desktop chip on a 10 nm process. The recorded data shows the Xeon winning 13 of 17 head-to-head benchmarks, but the i9-14900T taking decisive victories in single-thread performance, integer math, and data encryption. The Xeon 6505P sits at the 91st percentile of all CPUs in the database with an average benchmark score of 53701, while the i9-14900T sits at the 90th percentile with an average score of 51015.

The Verdict

The data points to a clear split: the Xeon 6505P is the stronger choice for multi-threaded, compute-heavy server and workstation workloads, while the i9-14900T is better suited for single-threaded desktop tasks and workloads that favor high clock speeds. The Xeon leads in 13 of the 17 recorded head-to-head benchmarks, including every Cinebench test, with a consistent 6.1% advantage in Cinebench R23 multi-core (32687 vs 30803) and single-core (4614 vs 4348). Its biggest wins come in extended instructions (37515 vs 23660, a 58.6% lead), physics (2991 vs 2245, a 33.2% lead), and prime number finding (217 vs 164, a 32.3% lead).

The i9-14900T is not a weak competitor. It wins single-thread performance decisively (4016 vs 3187, a 20.6% lead), integer math (138149 vs 120456, a 12.8% lead), and data encryption (27062 vs 24458, a 9.6% lead). These are meaningful wins for desktop users who rely on single-threaded applications, integer-heavy code, or encryption workloads. The i9 also does this with a 35 W TDP compared to the Xeon's 150 W TDP, making it far more power-efficient for desktop use.

For a server or workstation buyer, the Xeon is the obvious pick: it wins the vast majority of benchmarks, offers eight-channel DDR5 memory with 409.6 GB/s bandwidth, and supports ECC memory. For a desktop user who needs strong single-thread performance, the i9 is the better fit.

Architecture Differences

The two processors differ fundamentally in architecture. The Xeon uses the Granite Rapids architecture on a 5 nm process, while the i9 uses Raptor Lake on a 10 nm process. The Xeon has 12 cores and 24 threads, while the i9 has 24 cores and 32 threads. Despite having half the cores, the Xeon still wins most multi-threaded benchmarks, which points to architectural efficiency and memory bandwidth advantages.

Cache configurations differ as well. The Xeon has 112 KB of L1 cache per core and 2 MB of L2 cache per core, with 48 MB of shared L3 cache. The i9 has 80 KB of L1 per core and 2 MB of L2 per core, with 36 MB of shared L3 cache. The Xeon's larger L1 and L3 caches contribute to its lead in cache-sensitive workloads.

Memory support is a major differentiator. The Xeon supports DDR5 with an eight-channel memory bus and 409.6 GB/s of memory bandwidth. The i9 supports both DDR4 and DDR5 with a dual-channel memory bus, and no memory bandwidth figure is recorded in the database. The Xeon's eight-channel memory subsystem is a server-class feature that explains its strong performance in memory-intensive workloads.

PCIe connectivity also differs sharply. The Xeon provides Gen 5 with 88 lanes (CPU only), while the i9 provides Gen 5 with 16 lanes (CPU only). This makes the Xeon far more suitable for systems with many expansion cards, GPUs, or NVMe drives. The i9 includes integrated UHD Graphics 770, while the Xeon has no integrated graphics, meaning the Xeon requires a discrete GPU for any display output.

The i9 has a die size of 257 mm², while no die size is recorded for the Xeon. The i9 has a base clock of 1.10 GHz and a boost clock of 5.50 GHz, while the Xeon has a base clock of 2.20 GHz and a boost clock of 4.10 GHz. The i9's much higher boost clock explains its single-thread advantage. The i9 has a 35 W TDP, the Xeon a 150 W TDP. Both support ECC memory. Neither is multiplier unlocked. The Xeon uses Intel Socket 4710, the i9 uses Intel Socket 1700. The Xeon was released on 2025-02-23, the i9 on 2024-01-07. The Xeon's launch MSRP is $563, the i9's is $549.

Head-to-Head Benchmarks

The Xeon wins every Cinebench test. In Cinebench R15 multi-core, it scores 3294 against the i9's 3104, a 6.1% lead. In R15 single-core, it scores 464 against 438, a 5.9% lead. In R20 multi-core, 13728 vs 12937, a 6.1% lead. In R20 single-core, 1937 vs 1826, a 6.1% lead. In R23 multi-core, 32687 vs 30803, a 6.1% lead. In R23 single-core, 4614 vs 4348, a 6.1% lead.

The Xeon's largest win is in Passmark extended instructions, where it scores 37515 against the i9's 23660, a 58.6% lead. This is a massive gap and indicates the Xeon's Granite Rapids architecture is significantly stronger at SIMD and extended instruction set workloads. The Xeon also wins Passmark physics by 33.2% (2991 vs 2245) and Passmark find prime numbers by 32.3% (217 vs 164).

In Passmark data compression, the Xeon scores 480368 against 436066, a 10.2% lead. In random string sorting, the Xeon wins 52372 vs 49484, a 5.8% lead. In floating point math, the Xeon wins narrowly, 92992 vs 92699, a 0.3% lead. In Passmark multithread, the Xeon wins 38456 vs 36239, a 6.1% lead.

The i9 wins four benchmarks. Its biggest win is in Passmark single-thread, where it scores 4016 against the Xeon's 3187, a 20.6% lead. This is a decisive margin and reflects the i9's 5.50 GHz boost clock against the Xeon's 4.10 GHz. The i9 also wins Passmark integer math, 138149 vs 120456, a 12.8% lead. In data encryption, the i9 scores 27062 against 24458, a 9.6% lead. These three wins, plus the duplicate single-thread entry, give the i9 four wins out of seventeen.

FAQ

Q: Which processor is faster in single-threaded workloads?

A: The answer depends on the benchmark. The Xeon wins all three Cinebench single-core tests (R15, R20, R23) by 6.1%, scoring 4614 in R23 single-core against the i9's 4348. However, the i9 wins Passmark single-thread by a wide margin, 4016 vs 3187, a 20.6% lead. The i9's higher boost clock of 5.50 GHz likely explains its Passmark advantage, while the Xeon's architecture wins in Cinebench.

Q: Which processor has more cores and threads?

A: The i9 has 24 cores and 32 threads, while the Xeon has 12 cores and 24 threads. Despite having half the cores, the Xeon still wins most multi-threaded benchmarks, including Cinebench R23 multi-core (32687 vs 30803) and Passmark multithread (38456 vs 36239).

Q: Do both processors support ECC memory?

A: Yes, both the Xeon and the i9 support ECC memory. However, the Xeon supports DDR5 with an eight-channel memory bus and 409.6 GB/s bandwidth, while the i9 supports both DDR4 and DDR5 with a dual-channel memory bus.

Q: Which processor is better for data encryption?

A: The i9 wins in data encryption, scoring 27062 in Passmark data encryption against the Xeon's 24458, a 9.6% lead. This is one of the four benchmarks the i9 wins.

Q: What are the TDP differences?

A: The Xeon has a 150 W TDP, while the i9 has a 35 W TDP. The i9 is far more power-efficient, which makes it suitable for desktop systems with limited cooling, while the Xeon's higher TDP reflects its server-class performance and memory subsystem.

Where Each One Wins

The Xeon wins in 13 of 17 benchmarks, making it the dominant processor for most compute workloads. Its biggest wins are in extended instructions (58.6% lead), physics (33.2% lead), and prime number finding (32.3% lead). It also wins all Cinebench tests by 6.1%, data compression by 10.2%, random string sorting by 5.8%, floating point math by 0.3%, and Passmark multithread by 6.1%. The Xeon is the clear choice for server and workstation deployments where multi-threaded compute, memory bandwidth, and PCIe expansion are critical. Its eight-channel DDR5 memory with 409.6 GB/s bandwidth and 88 PCIe Gen 5 lanes make it suitable for high-performance computing, large-scale virtualization, and data-intensive applications.

The i9 wins in four benchmarks: Passmark single-thread (20.6% lead), integer math (12.8% lead), data encryption (9.6% lead), and the duplicate single-thread entry. These wins make it the better choice for desktop users who prioritize single-threaded application performance, integer-heavy code, and encryption workloads. Its 35 W TDP and integrated UHD Graphics 770 make it suitable for compact desktop systems and office workstations where power efficiency and integrated display output matter. The i9 also supports both DDR4 and DDR5 memory, giving desktop builders flexibility in memory selection.