Intel Core 5 315 vs Intel Core Ultra 7 265KF Comparison

The Intel Core 5 315 and the Intel Core Ultra 7 265KF occupy distinct positions in Intel’s 3 nm product stack. The Core 5 315 is a 6-core mobile part built on the Wildcat Lake architecture, while the Core Ultra 7 265KF is a 20-core desktop processor from the Arrow Lake-S family. The recorded benchmark data shows the Ultra 7 265KF ahead in every single measured test, with the average benchmark score of the Core 5 315 (18188) sitting at 72 percent of all CPUs, compared to the Ultra 7 265KF’s 94 percent percentile. The gap is substantial across both multi-threaded and single-threaded workloads, though the magnitude of the difference varies considerably by test type.

FAQ

Q: Which processor has the higher average benchmark score?

A: The Intel Core Ultra 7 265KF records an average benchmark score of 71910, while the Intel Core 5 315 records 18188. The Ultra 7 265KF also achieves a 94 percentile versus all CPUs, compared to the Core 5 315’s 72 percentile.

Q: How large is the difference in Cinebench R23 multi-core performance?

A: The Core Ultra 7 265KF scores 49736 in Cinebench R23 multi-core, against 12981 for the Core 5 315. This represents a delta of -73.9 percent for the Core 5 315, meaning the Ultra 7 265KF delivers roughly 3.8 times the multi-core score.

Q: Which chip has the larger single-thread performance advantage?

A: The Core Ultra 7 265KF wins all single-threaded tests. In PassMark single-thread, it scores 4928 versus 4021 for the Core 5 315, a delta of -18.4 percent. The gap is wider in Cinebench R23 single-core, where the Ultra 7 265KF scores 7021 versus 1832, a delta of -73.9 percent.

Q: What are the core and thread counts of each processor?

A: The Intel Core 5 315 has 6 cores and 6 threads. The Intel Core Ultra 7 265KF has 20 cores and 20 threads. Neither processor uses simultaneous multithreading.

Q: Do both processors support the same memory types?

A: No. The Core 5 315 supports DDR5 and LPDDR5X memory with a single-channel bus and 59.7 GB/s bandwidth. The Core Ultra 7 265KF supports DDR5 only, but uses a dual-channel bus with 102.4 GB/s bandwidth.

Q: Which processor has a higher boost clock?

A: The Core Ultra 7 265KF has a boost clock of 5.50 GHz, compared to 4.40 GHz for the Core 5 315. The base clocks are 3.90 GHz and 1.50 GHz, respectively.

Architecture Differences

The two processors are built on the same 3 nm process node but differ in nearly every other architectural aspect. The Core 5 315 uses the Wildcat Lake codename and belongs to the Core 5 generation, while the Core Ultra 7 265KF uses the Arrow Lake-S codename under the Core Ultra Series 2 family. The foundry also differs: the Core 5 315 is manufactured by Intel, whereas the Core Ultra 7 265KF is manufactured by TSMC.

The core configuration is the most obvious divergence. The Core 5 315 packs 6 cores and 6 threads, while the Core Ultra 7 265KF packs 20 cores and 20 threads. Both parts lack hyper-threading, so thread counts equal core counts. The cache hierarchy also scales differently. The Core 5 315 has a 192 KB L1 cache and a 2.5 MB L2 cache, with 6 MB of shared L3. The Core Ultra 7 265KF specifies 192 KB L1 per core and 3 MB L2 per core, with 30 MB of shared L3. The larger per-core L2 on the Ultra 7 265KF, combined with the much larger shared L3, gives it a significant cache capacity advantage for data-heavy workloads.

Memory architecture reinforces the performance tier separation. The Core 5 315 uses a single-channel memory bus with 59.7 GB/s bandwidth and supports both DDR5 and LPDDR5X. The Core Ultra 7 265KF uses a dual-channel bus with 102.4 GB/s bandwidth and supports DDR5 only. The 71 percent higher memory bandwidth of the Ultra 7 265KF aligns with its desktop positioning, where memory throughput is less constrained by power envelopes.

PCIe support also marks a generational and segment split. The Core 5 315 provides PCIe Gen 4 with 6 lanes from the CPU. The Core Ultra 7 265KF provides PCIe Gen 5 with 20 lanes from the CPU. The integrated graphics situation is reversed: the Core 5 315 includes Intel Xe3 Graphics with 2 Xe cores, while the Core Ultra 7 265KF has no integrated graphics, as indicated by its "KF" suffix. The Core Ultra 7 265KF has an unlocked multiplier, while the Core 5 315 does not. The Core Ultra 7 265KF is a desktop part on Intel Socket 1851, whereas the Core 5 315 is a mobile part on Intel BGA 1516.

Head-to-Head Benchmarks

The recorded data shows the Core Ultra 7 265KF winning all 17 head-to-head benchmark comparisons. The Core 5 315 records zero wins. The deltas, however, are not uniform, and the pattern reveals where the architecture differences matter most.

Multi-threaded rendering shows the largest absolute gaps. In Cinebench R15 multi-core, the Core Ultra 7 265KF scores 5013 against 1308 for the Core 5 315, a delta of -73.9 percent. Cinebench R20 multi-core follows the same pattern: 20889 versus 5452, also -73.9 percent. Cinebench R23 multi-core repeats the result with 49736 versus 12981, again -73.9 percent. The consistency of the -73.9 percent delta across all three Cinebench multi-core versions indicates the performance ratio is stable across workload scaling, which points to a pure throughput advantage rather than a test-specific quirk.

Single-core Cinebench results show a similar ratio. Cinebench R15 single-core gives 707 for the Ultra 7 265KF versus 184 for the Core 5 315, a -74 percent delta. Cinebench R20 single-core gives 2948 versus 769, at -73.9 percent. Cinebench R23 single-core gives 7021 versus 1832, again at -73.9 percent. The near-identical deltas across single and multi-core Cinebench tests suggest the per-core performance gap is the dominant factor, with the core count multiplying that advantage in multi-threaded runs.

PassMark integer math shows the Core Ultra 7 265KF at 143351 versus 31690 for the Core 5 315, a delta of -77.9 percent. Floating-point math shows 189431 versus 42441, a -77.6 percent delta. Data compression is the widest gap in the PassMark suite: 666589 versus 146143, a -78.1 percent delta. Random string sorting also sits near the wide end at 79735 versus 17551, a -78 percent delta. Data encryption shows 48198 versus 11119, a -76.9 percent delta. Find prime numbers shows 486 versus 112, a -77 percent delta. Extended instructions show 54513 versus 13143, a -75.9 percent delta.

The closest contest is PassMark single-thread. The Core Ultra 7 265KF scores 4928, and the Core 5 315 scores 4021, a delta of only -18.4 percent. This is the only benchmark where the Core 5 315 comes within a narrow margin, and it indicates that the Wildcat Lake core design is competitive on a per-core basis in integer-heavy single-threaded tasks. PassMark physics also shows a relatively smaller gap: 3633 versus 1163, a -68 percent delta, though this still represents a clear win for the Ultra 7 265KF.

Specification Differences

The two processors differ across nearly every specification field in the database. The Core 5 315 has 6 cores and 6 threads, while the Core Ultra 7 265KF has 20 cores and 20 threads. Base clock speeds are 1.50 GHz for the Core 5 315 and 3.90 GHz for the Core Ultra 7 265KF. Boost clocks are 4.40 GHz and 5.50 GHz, respectively. TDP is listed at 15 watts for the Core 5 315 and 125 watts for the Core Ultra 7 265KF.

The socket and market segment differ: Intel BGA 1516 for mobile in the Core 5 315, versus Intel Socket 1851 for desktop in the Core Ultra 7 265KF. The Core Ultra 7 265KF has an unlocked multiplier; the Core 5 315 does not. Process node is 3 nm for both, but the foundry differs: Intel for the Core 5 315, TSMC for the Core Ultra 7 265KF. The Core Ultra 7 265KF also lists 17,800 million transistors and a 243 mm² die size, while the Core 5 315 lists no transistor count or die size.

Cache configurations diverge in structure. The Core 5 315 lists L1 at 192 KB, L2 at 2.5 MB, and L3 at 6 MB shared. The Core Ultra 7 265KF lists L1 at 192 KB per core, L2 at 3 MB per core, and L3 at 30 MB shared. Memory support differs: the Core 5 315 supports DDR5 and LPDDR5X on a single-channel bus with 59.7 GB/s bandwidth, while the Core Ultra 7 265KF supports DDR5 only on a dual-channel bus with 102.4 GB/s bandwidth. PCIe support is Gen 4 with 6 lanes for the Core 5 315, versus Gen 5 with 20 lanes for the Core Ultra 7 265KF. Integrated graphics are present on the Core 5 315 (Intel Xe3 Graphics, 2 Xe cores) and absent on the Core Ultra 7 265KF. Release dates are 2026-04-15 for the Core 5 315 and 2024-10-23 for the Core Ultra 7 265KF. The launch MSRP of the Core Ultra 7 265KF is $379. The launch MSRP of the Core 5 315 is $340.

Where Each One Wins

The head-to-head data leaves no ambiguity about overall performance: the Core Ultra 7 265KF wins every recorded benchmark. The real analytical question is the margin structure, which determines what each part is suited for.

The Core Ultra 7 265KF dominates in multi-threaded throughput. Its 20 cores, combined with 30 MB of shared L3 and dual-channel 102.4 GB/s memory bandwidth, deliver deltas of -73.9 percent to -78.1 percent against the Core 5 315 across Cinebench multi-core and PassMark multi-threaded workloads. This includes the widest gap in the entire dataset, data compression at -78.1 percent, which is a memory-and-cache-sensitive workload. The Ultra 7 265KF also wins every single-core test, though the margin narrows to -18.4 percent in PassMark single-thread. That result suggests the Core 5 315’s Wildcat Lake core is not far behind in basic integer single-thread execution, but the gap expands sharply when the workload scales to multiple cores or uses more complex instruction paths.

The Core 5 315 has no benchmark wins, but its profile is not without distinct advantages. Its 15-watt TDP, single-channel LPDDR5X support, and integrated Xe3 graphics make it a mobile-oriented part, while the Ultra 7 265KF requires a discrete GPU and a desktop platform. The Core 5 315 also carries a $340 launch MSRP versus $379 for the Ultra 7 265KF. In the recorded data, the Core 5 315’s closest relative is the AMD EPYC 9274F, with a delta of 0 percent, and the Intel Core i7-9700, also at 0 percent. The Core Ultra 7 265KF’s nearest rival is the AMD Ryzen 7 8840HX at a 0.2 percent delta, with the Intel Xeon 6517P at -0.6 percent.

The use-case split follows the data. The Core Ultra 7 265KF is the choice for CPU-bound rendering, data compression, encryption, and any workload that can use more than six cores. Its 20 threads and 5.50 GHz boost clock place it in the top 6 percent of all CPUs in the database. The Core 5 315 is a lower-power mobile part whose single-thread score of 4021 in PassMark is within 18.4 percent of the desktop flagship, which means it handles everyday single-threaded tasks with reasonable efficiency, but it cannot match the Ultra 7 265KF in sustained multi-core work. The data supports a clear performance hierarchy, with the Ultra 7 265KF as the higher-tier part across every measured metric.