Intel Core Ultra 7 265F vs Intel Xeon 6515P Comparison

FAQ

Q: How does the Intel Xeon 6515P compare to the Intel Core Ultra 7 265F in average benchmark score?

A: The Xeon 6515P records an average benchmark score of 67006, while the Core Ultra 7 265F averages 64438. Both CPUs sit in the 93rd percentile among all processors in the database.

Q: Which processor has more cores and threads?

A: The Core Ultra 7 265F has 20 cores and 20 threads, while the Xeon 6515P has 16 cores and 32 threads. The Xeon therefore offers more threads despite fewer cores, thanks to simultaneous multithreading.

Q: What are the clock speed differences?

A: The Xeon 6515P has a base clock of 2.30 GHz and a boost clock of 3.80 GHz. The Core Ultra 7 265F runs at 2.40 GHz base and boosts to 5.30 GHz, giving it a substantial frequency advantage.

Q: How much memory bandwidth does each processor support?

A: The Xeon 6515P supports eight-channel DDR5 memory with 409.6 GB/s of bandwidth. The Core Ultra 7 265F uses dual-channel DDR5 with 102.4 GB/s, exactly one quarter of the Xeon's bandwidth.

Q: Which processor wins in single-threaded performance?

A: The Core Ultra 7 265F dominates single-threaded workloads. In PassMark single-thread testing, it scores 4750 against the Xeon's 2855, a 39.9% advantage.

Q: Do both processors support ECC memory?

A: No. The Xeon 6515P supports ECC memory, while the Core Ultra 7 265F does not. This reflects their different market positions, server versus desktop.

Architecture Differences

The Intel Xeon 6515P and Intel Core Ultra 7 265F represent two fundamentally different design philosophies within Intel's current lineup. The Xeon 6515P belongs to the Granite Rapids family, specifically the Granite Rapids-SP generation, built for server and workstation deployments. Its architecture uses a 5 nm process manufactured by Intel. The Core Ultra 7 265F, in contrast, comes from the Arrow Lake family, specifically Arrow Lake-S, targeting desktop systems. It uses a 3 nm process manufactured by TSMC.

The core configurations highlight the divergence. The Xeon 6515P packs 16 cores with 32 threads, relying on simultaneous multithreading to double its thread count. The Core Ultra 7 265F offers 20 cores but only 20 threads, meaning it lacks multithreading entirely. This is a notable design choice, prioritizing raw core count over thread duplication.

Cache hierarchies differ significantly as well. The Xeon 6515P provides 112 KB of L1 cache per core and 2 MB of L2 cache per core, with a large 72 MB shared L3 cache. The Core Ultra 7 265F offers 192 KB of L1 per core and 3 MB of L2 per core, but only 30 MB of shared L3 cache. The Xeon's total L3 capacity is more than double that of the desktop chip, which matters for large working sets common in server workloads.

Memory architecture is another major split. The Xeon 6515P supports eight-channel DDR5 memory, delivering 409.6 GB/s of bandwidth, and includes ECC support for data integrity. The Core Ultra 7 265F uses dual-channel DDR5 with 102.4 GB/s of bandwidth and lacks ECC support. The Xeon also provides 88 PCIe Gen 5 lanes from the CPU, while the Core Ultra 7 265F provides 20 Gen 5 lanes. The Xeon's massive lane count and memory bandwidth position it for multi-device, memory-intensive server tasks, while the Core Ultra targets conventional desktop workloads.

Clock speeds reveal another contrast. The Xeon 6515P operates at 2.30 GHz base and 3.80 GHz boost, with a thermal design power of 150 watts. The Core Ultra 7 265F runs at 2.40 GHz base and 5.30 GHz boost, with a TDP of only 65 watts. The desktop chip achieves a much higher boost clock while consuming less power, a reflection of the newer 3 nm process and its consumer-focused design targets. The Xeon, however, compensates with its wide memory bus and larger cache pool.

Neither processor includes integrated graphics, and both are locked, meaning their multipliers cannot be adjusted. They also use entirely different sockets, the Xeon on Intel Socket 4710 and the Core Ultra 7 265F on Intel Socket 1851, so they are not interchangeable in any platform.

Where Each One Wins

The benchmark data divides these two processors into distinct usage profiles. The Core Ultra 7 265F wins the majority of head-to-head comparisons, taking 12 of the 17 recorded tests. Its victories cluster around single-threaded responsiveness, floating-point math, and multithreaded rendering workloads.

The Core Ultra 7 265F wins every Cinebench test by an identical 8.2% margin, covering both single-core and multi-core variants of R15, R20, and R23. In PassMark testing, it wins single-thread, data encryption, floating-point math, prime number finding, and overall multithread scores. The floating-point math result is particularly strong, with the Core Ultra scoring 173855 against the Xeon's 128954, a 25.8% advantage. Data encryption shows a 22.8% lead, and single-thread performance is a commanding 39.9% ahead.

The Xeon 6515P wins 5 tests, and its victories reveal where server-oriented design pays off. Data compression shows a 16.9% advantage, with the Xeon scoring 592645 versus 507018. Extended instructions yield a 36.1% lead, the largest margin in the entire comparison. Integer math comes in 6.5% ahead, physics simulation is 20.7% ahead, and random string sorting edges out a 3.2% win.

The pattern is clear. The Core Ultra 7 265F excels in tasks that benefit from high clock speeds and modern floating-point execution, such as rendering, encryption, and general desktop responsiveness. The Xeon 6515P wins in data manipulation tasks, extended instruction workloads, and physics simulation, areas where its larger cache, eight-channel memory bandwidth, and server-tuned architecture provide advantages. For compression-heavy pipelines or integer-focused server tasks, the Xeon is the stronger choice. For everything else in this benchmark suite, the Core Ultra 7 265F takes the lead.

Specification Differences

The two processors differ across nearly every specification category. The Xeon 6515P uses 16 cores and 32 threads, while the Core Ultra 7 265F uses 20 cores and 20 threads. Base clocks are close, 2.30 GHz versus 2.40 GHz, but boost clocks diverge sharply, 3.80 GHz versus 5.30 GHz. Thermal design power also contrasts heavily, 150 watts for the Xeon versus 65 watts for the Core Ultra.

The Xeon 6515P is built on a 5 nm Intel process, while the Core Ultra 7 265F uses a 3 nm TSMC process. The Core Ultra has published transistor and die size figures, 17,800 million transistors on a 243 square millimeter die, while the Xeon's figures are not listed in the database. Cache allocations differ per core and in total: the Xeon has 112 KB L1 and 2 MB L2 per core with 72 MB shared L3, while the Core Ultra has 192 KB L1 and 3 MB L2 per core with 30 MB shared L3.

Memory support shows a major gap. The Xeon supports eight-channel DDR5 with 409.6 GB/s bandwidth and ECC memory. The Core Ultra supports dual-channel DDR5 with 102.4 GB/s bandwidth and no ECC. PCIe connectivity also differs, with the Xeon providing 88 Gen 5 lanes from the CPU and the Core Ultra providing 20 Gen 5 lanes.

The socket and market segment differ as expected. The Xeon 6515P uses Intel Socket 4710 and targets the server/workstation segment. The Core Ultra 7 265F uses Intel Socket 1851 and targets the desktop segment. Release dates are close, with the Xeon launching on 2025-02-23 and the Core Ultra on 2025-01-06. The Xeon carries a part number of SRVU6, while the Core Ultra is SRQCV. The Xeon has a launch MSRP of $740, while the Core Ultra has a launch MSRP of $379. Both processors have active production status, and neither includes integrated graphics or an unlocked multiplier.

Head-to-Head Benchmarks

The head-to-head results show a consistent pattern across Cinebench, where the Core Ultra 7 265F wins every test by the same 8.2% margin. In Cinebench R15 multicore, the Core Ultra scores 4231 against the Xeon's 3885. R15 single-core shows 597 versus 548. R20 multicore records 17631 versus 16189, and R20 single-core shows 2488 versus 2285. R23 multicore reaches 41980 versus 38547, while R23 single-core is 5926 versus 5442. The uniformity of the 8.2% delta across all six Cinebench tests suggests a consistent architectural efficiency advantage rather than a workload-specific quirk.

PassMark results show more variety. The Xeon's biggest win comes in extended instructions, where it scores 53383 against 39235, a 36.1% lead. This is the largest margin in either direction across the entire comparison. Data compression also favors the Xeon, 592645 versus 507018, a 16.9% advantage. Physics simulation goes to the Xeon at 3829 versus 3172, a 20.7% win. Integer math favors the Xeon at 147047 versus 138078, a 6.5% margin. Random string sorting is closer, with the Xeon winning 64425 versus 62439, just 3.2% ahead.

The Core Ultra 7 265F claims the remaining PassMark tests. Single-thread performance shows the largest gap, 4750 versus 2855, a 39.9% advantage. Floating-point math goes to the Core Ultra at 173855 versus 128954, a 25.8% win. Data encryption favors the Core Ultra at 39468 versus 30476, a 22.8% margin. Prime number finding is closer, 416 versus 385, a 7.5% edge. The overall multithread score goes to the Core Ultra at 49410 versus 45350, an 8.2% win.

The overall benchmark count favors the Core Ultra 7 265F, which wins 12 tests to the Xeon's 5. However, the average benchmark scores tell a slightly different story. The Xeon 6515P averages 67006, while the Core Ultra 7 265F averages 64438. This places the Xeon slightly ahead in overall average, despite losing most individual comparisons. The Xeon's nearest rival, the AMD EPYC 4465P, averages 66925, a 0.1% difference. The Core Ultra's closest competitor, the Intel Core Ultra 7 265, averages 64640, a 0.3% difference. Both processors sit in the same performance tier, with the Xeon marginally higher on aggregate.

The data also shows the Xeon 6515P sitting near the Intel Core Ultra 9 275HX, which averages 67469, a 0.7% difference, and the Intel Xeon w5-3525 at 67673, a 1% difference. The Core Ultra 7 265F sits near the AMD EPYC 7343 at 64202, a 0.4% difference, and the Intel Core i9-13900KS at 64051, a 0.6% difference. These rival positions confirm that both chips occupy the upper mid-range of the database's performance distribution.

The Verdict

The choice between these two processors depends entirely on workload priorities, and the benchmark data provides clear guidance. The Intel Core Ultra 7 265F is the better option for users who need strong single-threaded performance, high boost clocks, and efficiency. It wins all Cinebench tests, dominates floating-point math, encryption, and prime number finding, and does so with a 65 watt TDP. For desktop applications, rendering tasks, and general-purpose computing, the data consistently favors this chip.

The Intel Xeon 6515P is the better option for server and workstation environments where memory bandwidth, cache capacity, and specific instruction workloads matter more than raw clock speed. Its eight-channel memory support, 72 MB L3 cache, and ECC capability make it suited for data-heavy workloads. The benchmark results confirm this, with wins in extended instructions, data compression, physics simulation, and integer math. The 36.1% margin in extended instructions is the single largest performance gap recorded in this comparison, indicating a significant advantage for workloads that leverage those instructions.

The average benchmark scores show the Xeon 6515P slightly ahead overall, 67006 versus 64438, despite losing more individual tests. This suggests that the Xeon's wins come in tests that carry more weight in the aggregate scoring, or that its margin of victory in certain areas compensates for its losses. The Core Ultra 7 265F wins more tests, but the Xeon's wins in data compression and extended instructions are substantial enough to push its average higher.

For a desktop user, the Core Ultra 7 265F is the clear choice. Its 5.30 GHz boost clock, 20 cores, and superior single-thread score of 4750 versus 2855 make it more responsive in everyday applications. For a server administrator running compression pipelines, physics simulations, or integer-heavy workloads, the Xeon 6515P offers advantages that the desktop chip cannot match, particularly its 409.6 GB/s memory bandwidth and 88 PCIe Gen 5 lanes. The database records both processors at the 93rd percentile, but they serve different masters. The Core Ultra 7 265F wins the frequency race, while the Xeon 6515P wins the bandwidth and cache race.