CPU Comparison

The Intel Xeon 6515P and Intel Core 9 273PQE are both active Intel processors, but they target fundamentally different segments: the Xeon is a server/workstation part built for Granite Rapids-SP, while the Core 9 is a desktop chip based on Bartlett Lake. The benchmark data reveals a stark split: the Core 9 dominates in raw single-thread and integer workloads, while the Xeon counterattacks with massive wins in extended instructions, prime number finding, and physics simulations. With the Core 9 taking 10 of 17 head-to-head benchmarks and the Xeon winning 7, the choice hinges entirely on workload type rather than overall superiority.

Head-to-Head Benchmarks

The most lopsided victory belongs to the Xeon 6515P in the PassMark find prime numbers test, where it scores 385 versus the Core 9's 198, a 94.4% advantage. This is the single largest delta in the entire comparison, and it highlights the Xeon's server-grade integer throughput capabilities in a specific mathematical workload. Similarly, the Xeon dominates in extended instructions, posting 53,383 against 38,743, a 37.8% lead. The physics test also favors the Xeon heavily: 3,829 versus 2,754, a 39% margin. These three wins are not marginal; they represent categories where the Xeon's architecture provides a decisive functional advantage.

The Core 9 273PQE, however, strikes back in the most visible consumer benchmark categories. In Cinebench R23 multicore, the Core 9 scores 39,190 against the Xeon's 38,547, a 1.6% edge. The same 1.6% delta repeats across every Cinebench test (R15, R20, R23, both single and multicore), indicating a consistent architectural efficiency advantage. The single-thread PassMark test is where the Core 9 truly separates itself: 4,573 versus 2,855, a 37.6% lead. This is the second-largest delta in the comparison and underscores the Core 9's superior per-core performance, driven by its higher boost clock of 5.90 GHz versus the Xeon's 3.80 GHz.

The integer math test shows another Core 9 win, but with a twist. The Core 9 scores 164,629 against the Xeon's 147,047, a 10.7% advantage. This is notable because the Xeon has more cores (16 versus 12) and more threads (32 versus 24), yet still loses in integer throughput. The PassMark multithread test also goes to the Core 9: 46,107 versus 45,350, a 1.6% margin. The data compression test is close, with the Xeon winning 592,645 versus 585,752, a 1.2% edge. Data encryption similarly goes to the Xeon: 30,476 versus 29,636, a 2.8% win. Floating point math is another narrow Xeon victory: 128,954 versus 125,546, a 2.7% margin. Finally, random string sorting goes to the Xeon decisively: 64,425 versus 53,167, a 21.2% lead.

The pattern is clear. The Core 9 wins every Cinebench test and the single-thread/integer PassMark tests. The Xeon wins every other PassMark test, often by large margins. The average benchmark scores tell a similar story: the Xeon's average is 67,006, while the Core 9's is 66,099. The Xeon sits at the 93rd percentile of all CPUs, as does the Core 9, meaning both are top-tier performers overall. The Xeon's nearest rival is the AMD EPYC 4465P, which scores 66,925, a 0.1% delta. The Core 9's nearest rival is the Intel Core Ultra 5 250KF Plus at 66,159, a -0.1% delta. Both chips are effectively tied in aggregate performance, but the composition of that performance could not be more different.

The Verdict

The data does not support a single "better" processor. Instead, it defines two distinct personas. For workloads that rely on single-thread performance, integer math, and Cinebench-style rendering, the Core 9 273PQE is the clear choice. Its 37.6% lead in single-thread PassMark, 10.7% lead in integer math, and consistent 1.6% lead across all Cinebench versions make it the go-to for desktop productivity, general application responsiveness, and lightly-threaded tasks. The Core 9 also wins the PassMark multithread test, indicating that its 12 cores and 24 threads are more efficiently utilized than the Xeon's 16 cores and 32 threads in this particular benchmark.

For specialized server and workstation workloads, the Xeon 6515P is the only rational pick. Its 94.4% win in find prime numbers, 39% win in physics, and 37.8% win in extended instructions are not incremental improvements; they are category-level advantages. The Xeon also wins data compression, encryption, floating point math, and random string sorting, making it a superior choice for cryptographic tasks, scientific computing, and large-scale data manipulation. The Xeon's eight-channel memory bus (409.6 GB/s) versus the Core 9's dual-channel bus (89.6 GB/s) is a fundamental architectural difference that the benchmark results reflect in these memory-intensive workloads.

The aggregate scores are nearly identical: 67,006 for the Xeon versus 66,099 for the Core 9, a difference of less than 1.4%. The percentile ranking is identical at 93. If a buyer cannot define their workload, the data says either chip will perform at a similar overall level. But the moment the workload is specified, the decision becomes trivial. The Core 9's launch MSRP is $589; the Xeon's is $740. The Core 9 also runs at a lower TDP of 125 watts versus the Xeon's 150 watts, and it draws on a more mature 10 nm process versus the Xeon's 5 nm node.

Where Each One Wins

Intel Core 9 273PQE wins in: all Cinebench tests (R15, R20, R23, single and multicore, each by 1.6%), PassMark single-thread (4,573 vs 2,855, a 37.6% lead), PassMark integer math (164,629 vs 147,047, a 10.7% lead), and PassMark multithread (46,107 vs 45,350, a 1.6% lead). These wins map to desktop use cases: interactive applications, code compilation, office productivity, and any software that is not explicitly optimized for massive parallel execution. The Core 9's 5.90 GHz boost clock is the highest in this comparison and explains its single-thread supremacy.

Intel Xeon 6515P wins in: PassMark find prime numbers (385 vs 198, a 94.4% lead), PassMark extended instructions (53,383 vs 38,743, a 37.8% lead), PassMark physics (3,829 vs 2,754, a 39% lead), PassMark random string sorting (64,425 vs 53,167, a 21.2% lead), PassMark data encryption (30,476 vs 29,636, a 2.8% lead), PassMark floating point math (128,954 vs 125,546, a 2.7% lead), and PassMark data compression (592,645 vs 585,752, a 1.2% lead). These wins align with server workloads: encryption, compression, scientific simulation, and database operations. The Xeon's 72 MB of shared L3 cache (versus 36 MB on the Core 9) and 88 PCIe Gen 5 lanes (versus 16) support its server positioning.

FAQ

Q: Which processor has a higher single-thread score?

A: The Intel Core 9 273PQE, with a PassMark single-thread score of 4,573 versus the Xeon 6515P's 2,855, a 37.6% advantage. The Core 9 also wins every Cinebench single-core test by 1.6%.

Q: Is the Xeon 6515P better at encryption?

A: Yes. The Xeon scores 30,476 in PassMark data encryption, while the Core 9 scores 29,636, a 2.8% lead for the Xeon.

Q: What is the biggest performance gap in the comparison?

A: The PassMark find prime numbers test, where the Xeon 6515P scores 385 versus the Core 9's 198, a 94.4% difference in favor of the Xeon.

Q: Do both processors have the same overall performance percentile?

A: Yes, both are at the 93rd percentile of all CPUs. The Xeon has an average benchmark score of 67,006, and the Core 9 has 66,099.

Q: Which chip supports more memory bandwidth?

A: The Xeon 6515P supports DDR5 with an eight-channel memory bus delivering 409.6 GB/s. The Core 9 273PQE supports DDR4 and DDR5 with a dual-channel bus delivering 89.6 GB/s.

Q: Does the Core 9 have integrated graphics?

A: Yes, the Core 9 273PQE includes UHD Graphics 770. The Xeon 6515P has no integrated graphics (N/A).

Architecture Differences

The two processors are built on fundamentally different platforms. The Xeon 6515P uses the Granite Rapids architecture on a 5 nm Intel process, while the Core 9 273PQE uses the Bartlett Lake architecture on a 10 nm Intel process. The Xeon has 16 cores and 32 threads, compared to the Core 9's 12 cores and 24 threads. Core clocks differ significantly: the Xeon runs at a 2.30 GHz base and 3.80 GHz boost, while the Core 9 runs at 3.40 GHz base and 5.90 GHz boost. Cache hierarchies are also distinct: the Xeon has 112 KB L1 per core, 2 MB L2 per core, and 72 MB shared L3; the Core 9 has 80 KB L1 per core, 2 MB L2 per core, and 36 MB shared L3.

Memory support is a major differentiator. The Xeon uses DDR5 exclusively with an eight-channel memory bus and 409.6 GB/s bandwidth, while the Core 9 supports both DDR4 and DDR5 over a dual-channel bus with 89.6 GB/s bandwidth. Both support ECC memory. PCIe connectivity is dramatically different: the Xeon provides 88 Gen 5 lanes (CPU only), while the Core 9 provides 16 Gen 5 lanes. The Xeon targets the Intel Socket 4710 and is classified as a Server/Workstation part, whereas the Core 9 uses Intel Socket 1700 and is a Desktop part. The Xeon is from the Xeon 6 (Granite Rapids-SP) generation and was released on 2025-02-23; the Core 9 is from the Core 9 (Bartlett Lake) generation and was released on 2026-03-08. Neither processor has an unlocked multiplier. The Xeon's part number is SRVU6, and the Core 9's is SA4Q9.