Intel Core Ultra 7 265 vs Intel Xeon 6515P Comparison

The Intel Xeon 6515P and the Intel Core Ultra 7 265 target entirely different segments of the processor market, yet their benchmark scores place them in a similar performance tier overall. The Xeon 6515P is a server and workstation part built for sustained throughput across enterprise workloads, while the Core Ultra 7 265 is a desktop processor designed for high single-thread responsiveness and everyday multithreaded tasks. The recorded data shows a split decision: the Core Ultra 7 265 wins 10 of the 17 head-to-head benchmark comparisons, while the Xeon 6515P takes 7. Both processors sit at the 93rd percentile against all CPUs in the database, and their average benchmark scores are close, with the Xeon at 67006 and the Core Ultra 7 at 64640. The choice between them depends almost entirely on the workload type, platform requirements, and whether the user needs server-grade features like eight-channel memory and ECC support.

The Verdict

The Intel Xeon 6515P is the processor to select for server and workstation deployments where memory bandwidth, data compression, extended instruction throughput, and physics simulation are the dominant tasks. It delivers a massive 158.3% lead over the Core Ultra 7 265 in Cinebench R20 multi-core and a 158.5% lead in Cinebench R20 single-core, along with wins in PassMark data compression, extended instructions, integer math, physics, and random string sorting. Its 409.6 GB/s memory bandwidth, enabled by eight-channel DDR5, is a decisive advantage for workloads that move large datasets.

The Intel Core Ultra 7 265 is the better pick for desktop users who prioritize single-thread performance, encryption, floating-point math, and overall multi-threaded responsiveness in consumer applications. It leads by 39.1% in PassMark single-thread, 25.4% in floating-point math, and 24.7% in data encryption. It also wins Cinebench R15 multi-core, R15 single-core, R23 multi-core, and R23 single-core by 8.7% each, plus PassMark find prime numbers by 7.9% and PassMark multithread by 8.7%. The Core Ultra 7 runs on a 65 W TDP with a 5.30 GHz boost clock, making it suited for systems where power efficiency and high clock speeds matter more than raw memory throughput.

For mixed workloads, the database shows the Xeon 6515P holds an edge in server-class tasks, while the Core Ultra 7 265 is superior for desktop-oriented and single-thread-sensitive applications. The Xeon 6515P is the only choice if ECC memory, eight-channel memory support, or 88 PCIe Gen 5 lanes are required. The Core Ultra 7 265 is the only choice if integrated graphics are needed, as it includes Arc Xe-LPG Graphics 32EU while the Xeon has no integrated graphics.

Architecture Differences

The Xeon 6515P is built on Granite Rapids architecture using a 5 nm process node from Intel, while the Core Ultra 7 265 uses Arrow Lake architecture on a 3 nm process node from TSMC. The Xeon belongs to the Xeon 6 generation (Granite Rapids-SP) and is manufactured by Intel, whereas the Core Ultra 7 is part of the Core Ultra Series 2 and the Ultra 7 (Arrow Lake) generation, fabricated by TSMC.

The core and thread configurations differ significantly. The Xeon 6515P has 16 cores and 32 threads, relying on simultaneous multithreading to double its thread count. The Core Ultra 7 265 has 20 cores and 20 threads, meaning it does not use multithreading and each core handles one thread. The Core Ultra 7 therefore has more physical cores but fewer total threads.

Cache hierarchies also diverge. The Xeon 6515P has 112 KB of L1 cache per core, 2 MB of L2 cache per core, and 72 MB of shared L3 cache. The Core Ultra 7 265 has 192 KB of L1 cache per core, 3 MB of L2 cache per core, and only 30 MB of shared L3 cache. The Xeon's 72 MB L3 is more than double the Core Ultra 7's capacity, which helps with large working sets in server workloads.

Memory support is a major architectural divide. Both support DDR5, but the Xeon 6515P uses an eight-channel memory bus with 409.6 GB/s bandwidth, while the Core Ultra 7 265 uses a dual-channel bus with 102.4 GB/s bandwidth. The Xeon supports ECC memory; the Core Ultra 7 does not. PCIe connectivity also differs: the Xeon provides Gen 5 with 88 lanes (CPU only), while the Core Ultra 7 provides Gen 5 with 20 lanes (CPU only).

Clock speeds are another key difference. The Xeon 6515P has a base clock of 2.30 GHz and a boost clock of 3.80 GHz. The Core Ultra 7 265 has a base clock of 2.40 GHz and a boost clock of 5.30 GHz. The Core Ultra 7's substantially higher boost clock explains its single-thread advantages. The Xeon's TDP is 150 W, while the Core Ultra 7's TDP is 65 W.

The Core Ultra 7 265 includes integrated graphics with Arc Xe-LPG Graphics 32EU, while the Xeon 6515P lists integrated graphics as N/A. The Xeon uses Intel Socket 4710 and the Core Ultra 7 uses Intel Socket 1851. The Core Ultra 7 has a transistor count of 17,800 million and a die size of 243 mm², figures not recorded for the Xeon.

Head-to-Head Benchmarks

The most dramatic result in the head-to-head data is the Cinebench R20 split. The Xeon 6515P scores 16189 in multi-core versus 6268 for the Core Ultra 7 265, a 158.3% advantage. In R20 single-core, the Xeon scores 2285 versus 884, a 158.5% lead. These are the largest margins in either direction across all tests.

The Core Ultra 7 265 counters in the Cinebench R15 and R23 tests. It wins R15 multi-core with 4255 versus 3885, R15 single-core with 600 versus 548, R23 multi-core with 42216 versus 38547, and R23 single-core with 5960 versus 5442. Each of these wins is by 8.7%.

PassMark results are more varied. The Xeon 6515P wins data compression with 592645 versus 522983, a 13.3% margin. It wins extended instructions with 53383 versus 41478, a 28.7% margin. It wins integer math with 147047 versus 134773, a 9.1% margin. It wins physics with 3829 versus 2923, a 31% margin. It wins random string sorting with 64425 versus 63833, a narrow 0.9% margin.

The Core Ultra 7 265 wins data encryption with 40456 versus 30476, a 24.7% margin. It wins find prime numbers with 418 versus 385, a 7.9% margin. It wins floating-point math with 172776 versus 128954, a 25.4% margin. It wins multithread with 49682 versus 45350, an 8.7% margin. It wins single-thread with 4689 versus 2855, a 39.1% margin, and the same 39.1% margin in the duplicate singlethread test.

The pattern is consistent: the Xeon 6515P dominates in server-related workloads like compression, extended instructions, integer math, and physics, while the Core Ultra 7 265 dominates in latency-sensitive and consumer workloads like single-thread performance, encryption, and floating-point math.

FAQ

Q: Which processor has more cores?

A: The Intel Core Ultra 7 265 has 20 cores, while the Intel Xeon 6515P has 16 cores. However, the Xeon has 32 threads due to multithreading, while the Core Ultra 7 has 20 threads.

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

A: The Intel Core Ultra 7 265 is faster, winning PassMark single-thread with a score of 4689 versus 2855, a 39.1% lead. It also wins Cinebench R15, R20, and R23 single-core tests by 8.7%, 158.5%, and 8.7% respectively, though the R20 result is anomalous because the Xeon wins that specific test.

Q: Does the Xeon 6515P support ECC memory?

A: Yes, the Intel Xeon 6515P supports ECC memory. The Intel Core Ultra 7 265 does not support ECC memory.

Q: What is the memory bandwidth difference?

A: The Intel Xeon 6515P has an eight-channel memory bus with 409.6 GB/s bandwidth. The Intel Core Ultra 7 265 has a dual-channel memory bus with 102.4 GB/s bandwidth. The Xeon offers four times the memory bandwidth.

Q: Which processor includes integrated graphics?

A: The Intel Core Ultra 7 265 includes Arc Xe-LPG Graphics 32EU. The Intel Xeon 6515P has no integrated graphics, listed as N/A.

Q: How do the average benchmark scores compare?

A: The Intel Xeon 6515P has an average benchmark score of 67006, while the Intel Core Ultra 7 265 has an average of 64640. Both are at the 93rd percentile against all CPUs.

Where Each One Wins

The Intel Xeon 6515P wins in workloads that benefit from large shared cache, high memory bandwidth, and multithreaded server execution. Its 72 MB of L3 cache and 409.6 GB/s memory bandwidth support data compression, where it scores 592645 versus 522983. Extended instructions, a measure of SIMD and specialized instruction throughput, favor the Xeon at 53383 versus 41478. Integer math also goes to the Xeon at 147047 versus 134773. Physics simulation is a strong Xeon area, with 3829 versus 2923, a 31% lead. Random string sorting goes to the Xeon by a slim 0.9% margin, 64425 versus 63833. The Cinebench R20 results are also Xeon wins, with 16189 versus 6268 in multi-core and 2285 versus 884 in single-core, though these R20 numbers are outliers compared to the R15 and R23 results.

The Intel Core Ultra 7 265 wins in consumer desktop workloads and single-thread-sensitive tasks. Its 5.30 GHz boost clock drives a 39.1% lead in PassMark single-thread, 4689 versus 2855. Floating-point math is a clear Core Ultra 7 win at 172776 versus 128954, a 25.4% margin. Data encryption favors the Core Ultra 7 at 40456 versus 30476, a 24.7% lead. Find prime numbers goes to the Core Ultra 7 at 418 versus 385. Multithread performance in PassMark goes to the Core Ultra 7 at 49682 versus 45350. The Cinebench R15 and R23 tests all go to the Core Ultra 7 by 8.7%, including both multi-core and single-core variants.

The use-case split is straightforward. For server racks, data centers, and workstation builds that process large datasets, compress files, run physics simulations, or need ECC memory, the Xeon 6515P is the appropriate part. For desktop systems focused on responsiveness, encryption, floating-point math, and general consumer multithreading, the Core Ultra 7 265 is the better fit.

Specification Differences

The two processors differ in nearly every major specification category. The Xeon 6515P has 16 cores and 32 threads, while the Core Ultra 7 265 has 20 cores and 20 threads. Base clocks are close, with the Xeon at 2.30 GHz and the Core Ultra 7 at 2.40 GHz, but boost clocks diverge sharply: 3.80 GHz for the Xeon versus 5.30 GHz for the Core Ultra 7. TDP also differs, with the Xeon at 150 W and the Core Ultra 7 at 65 W.

Sockets are different: the Xeon 6515P uses Intel Socket 4710, while the Core Ultra 7 265 uses Intel Socket 1851. The Xeon is built on Granite Rapids architecture with a 5 nm Intel process node, while the Core Ultra 7 uses Arrow Lake architecture with a 3 nm TSMC process node. The Core Ultra 7 has a recorded transistor count of 17,800 million and a die size of 243 mm², while the Xeon has no recorded transistor or die size data.

Cache configurations differ per core and in total. The Xeon 6515P has 112 KB of L1 per core, 2 MB of L2 per core, and 72 MB of shared L3. The Core Ultra 7 265 has 192 KB of L1 per core, 3 MB of L2 per core, and 30 MB of shared L3. Memory support is DDR5 for both, but the Xeon uses eight channels with 409.6 GB/s bandwidth, while the Core Ultra 7 uses dual channels with 102.4 GB/s. ECC memory is supported only on the Xeon. PCIe lanes are Gen 5 for both, but the Xeon provides 88 lanes versus 20 lanes for the Core Ultra 7. Integrated graphics are absent on the Xeon, while the Core Ultra 7 includes Arc Xe-LPG Graphics 32EU. The Xeon is a server and workstation part, while the Core Ultra 7 is a desktop part. Both are active production parts, and neither has an unlocked multiplier. Launch MSRP for the Xeon is $740, and launch MSRP for the Core Ultra 7 is $394.