AMD EPYC 7D12 vs Intel Core i3-1305U Comparison

Head-to-Head Benchmarks

The benchmark data leaves little room for debate in this matchup. Across all six recorded Cinebench tests, the AMD EPYC 7D12 wins outright, and it does so by a consistent margin. In every single test, the EPYC 7D12 finishes 80.3% ahead of the Intel Core i3-1305U. That uniformity is remarkable, as it suggests the performance gap is structural rather than workload-specific.

Starting with multi-core performance, the EPYC 7D12 scores 3675 in Cinebench R15 multi-core, while the i3-1305U manages only 723. The R20 multi-core test shows a similar story: 15315 versus 3016. In R23 multi-core, the EPYC 7D12 posts 36465, compared to 7183 for the Intel part. These are not close contests. The EPYC 7D12 has 32 cores and 64 threads, which explains why it dominates any workload that scales across cores.

Single-core results are equally one-sided, though the reasons differ. The EPYC 7D12 scores 518 in Cinebench R15 single-core, 2162 in R20 single-core, and 5148 in R23 single-core. The i3-1305U trails with 102, 425, and 1014 respectively. The delta remains exactly 80.3% in each case. This is notable because the i3-1305U has a higher boost clock of 4.50 GHz, while the EPYC 7D12 boosts to only 3.00 GHz. Despite the clock disadvantage, the EPYC 7D12's Zen 2 architecture delivers higher per-thread performance in these tests.

The win tally confirms the sweep: the EPYC 7D12 wins all six head-to-head tests, and the i3-1305U records zero wins. For context, the i3-1305U sits at the 66th percentile among all CPUs in the database, with an average benchmark score of 11200. The EPYC 7D12 also sits at the 66th percentile, with an average score of 10547. The two parts occupy the same overall percentile, yet their benchmark profiles could not be more different. The i3-1305U's closest rivals include the Intel Xeon Gold 6336Y, which scores 11191, and the AMD Ryzen 5 3500U at 11176. The EPYC 7D12's nearest competitors include the Intel Core i7-4790 at 10556 and the AMD EPYC 7502P at 10512.

FAQ

Q: Which processor wins in multi-core workloads?

A: The AMD EPYC 7D12 wins every multi-core test in the database. In Cinebench R23 multi-core, it scores 36465 versus 7183 for the Intel Core i3-1305U, a margin of 80.3%.

Q: Does the Intel Core i3-1305U win in any benchmark?

A: No. The recorded data shows the EPYC 7D12 winning all six head-to-head Cinebench tests, while the i3-1305U has zero wins.

Q: How do their single-core scores compare?

A: The EPYC 7D12 leads in single-core tests as well. In Cinebench R23 single-core, it scores 5148 against 1014 for the i3-1305U, again a difference of 80.3%.

Q: Which processor has more cores and threads?

A: The EPYC 7D12 has 32 cores and 64 threads. The i3-1305U has 5 cores and 6 threads.

Q: What is the thermal design power of each chip?

A: The Intel Core i3-1305U has a TDP of 15 watts, while the AMD EPYC 7D12 has a TDP of 85 watts.

Q: Do both processors support the same memory type?

A: No. The i3-1305U supports DDR4 and DDR5 in a dual-channel configuration. The EPYC 7D12 supports DDR4 only, but across eight channels with a memory bandwidth of 204.8 GB/s.

Architecture Differences

The architectural gap between these two processors is fundamental. The Intel Core i3-1305U is built on Raptor Lake, specifically the Raptor Lake-U mobile variant, using a 10 nm process node fabricated by Intel. The AMD EPYC 7D12 uses Zen 2 architecture under the Rome codename, built on a 7 nm process at TSMC. The process node difference alone explains part of the efficiency and density disparity between the two designs.

The i3-1305U features 5 cores and 6 threads, a configuration that reflects its mobile-oriented design. It uses a hybrid layout typical of Raptor Lake-U parts, with performance and efficiency cores sharing the workload. Its cache hierarchy includes 80 KB of L1 per core, 1.25 MB of L2 per core, and 10 MB of shared L3 cache. The EPYC 7D12, by contrast, packs 32 cores and 64 threads across four chiplets. Each die measures 74 mm², and the processor contains 15,200 million transistors. Its cache design is different as well: 64 KB of L1 per core, 512 KB of L2 per core, 32 MB of L3 per die, and a total of 128 MB of L3 cache. That 128 MB of aggregate L3 is a massive pool for server workloads that benefit from large working sets.

Memory architecture also diverges sharply. The i3-1305U uses a dual-channel memory bus supporting both DDR4 and DDR5. The EPYC 7D12 uses an eight-channel memory bus limited to DDR4, with a recorded memory bandwidth of 204.8 GB/s. The EPYC 7D12 also supports ECC memory, a critical feature for server reliability, while the i3-1305U does not.

PCIe connectivity reflects their intended roles. The i3-1305U provides Gen 4 with 8 lanes from the CPU. The EPYC 7D12 provides Gen 4 with 128 lanes from the CPU, a sixteen-fold difference in lane count that enables massive expansion in server platforms.

The i3-1305U includes integrated graphics in the form of UHD Graphics 64EU, while the EPYC 7D12 has no integrated graphics at all, relying on a discrete GPU or other display solution in the host system. The market segments reinforce this: the i3-1305U is a mobile processor, while the EPYC 7D12 is aimed at server and workstation deployments.

Specification Differences

The two processors differ in nearly every specification field recorded in the database. The i3-1305U has 5 cores and 6 threads, while the EPYC 7D12 has 32 cores and 64 threads. Base clocks are 1600 MHz for the Intel part and 1100 MHz for the AMD part. Boost clocks are 4.50 GHz and 3.00 GHz respectively. The i3-1305U carries a 15 watt TDP, the EPYC 7D12 an 85 watt TDP.

Sockets are incompatible: Intel BGA 1744 for the i3-1305U, AMD Socket SP3 for the EPYC 7D12. The process nodes differ at 10 nm for Intel and 7 nm for the EPYC 7D12, with foundries listed as Intel and TSMC respectively. The EPYC 7D12 lists 15,200 million transistors and a 4x 74 mm² die size, while the i3-1305U has no recorded transistor count or die size.

Cache configurations differ in both allocation and total size. The i3-1305U has 80 KB of L1 per core, 1.25 MB of L2 per core, and 10 MB of shared L3. The EPYC 7D12 has 64 KB of L1 per core, 512 KB of L2 per core, 32 MB of L3 per die, and 128 MB of total L3.

Memory support is another point of divergence. The i3-1305U supports DDR4 and DDR5 over a dual-channel bus. The EPYC 7D12 supports DDR4 only over an eight-channel bus, with a memory bandwidth of 204.8 GB/s. ECC memory support is present on the EPYC 7D12 but absent on the i3-1305U.

PCIe capability differs by an order of magnitude: Gen 4 with 8 lanes on the Intel part, Gen 4 with 128 lanes on the AMD part. The i3-1305U includes UHD Graphics 64EU, while the EPYC 7D12 has no integrated graphics. The Intel part launched on 2023-01-03 with a launch MSRP of $309. The EPYC 7D12 launched on 2020-04-13 with no recorded launch MSRP. Both parts remain in active production.

Where Each One Wins

The AMD EPYC 7D12 wins in every benchmark category recorded in the database. In multi-core Cinebench tests, its advantage is overwhelming, driven by 32 cores and 64 threads. Any workload that can use more than a handful of threads will see massive gains on the EPYC 7D12. The 128 MB of total L3 cache and eight-channel DDR4 memory with 204.8 GB/s bandwidth make it suited for data-heavy server tasks, virtualization, and large-scale compute. ECC memory support adds reliability for long-running server environments. The 128 PCIe Gen 4 lanes allow extensive expansion for storage controllers, network cards, and accelerators.

The Intel Core i3-1305U does not win any recorded benchmark, but it occupies a different role entirely. Its 15 watt TDP and integrated UHD Graphics 64EU make it suitable for compact mobile systems. The dual-channel memory bus and support for both DDR4 and DDR5 give platform flexibility in thin laptops and mini PCs. Its higher boost clock of 4.50 GHz suggests strong burst responsiveness for light tasks, even if the recorded Cinebench single-core scores do not reflect a win over the EPYC 7D12. The 8 PCIe Gen 4 lanes are sufficient for a modest GPU or NVMe storage in a mobile chassis.

The use-case split is clear. The EPYC 7D12 is a server processor built for throughput, memory capacity, and I/O expansion. The i3-1305U is a low-power mobile processor built for everyday computing in battery-powered devices. Their benchmark results reflect those design goals, even though the EPYC 7D12 also wins in single-core tests.

The Verdict

The data points to a simple conclusion: if the workload is compute-heavy and can use many threads, the AMD EPYC 7D12 is the only choice between these two. It wins all six head-to-head tests by 80.3%, and its 32-core, 64-thread configuration dwarfs the 5-core, 6-thread layout of the Intel Core i3-1305U. The EPYC 7D12 also brings 128 MB of total L3 cache, eight-channel DDR4 memory with 204.8 GB/s bandwidth, ECC support, and 128 PCIe Gen 4 lanes. These are server-grade features that the i3-1305U simply does not offer.

The Intel Core i3-1305U is not without a purpose. Its 15 watt TDP, integrated graphics, and dual-channel DDR4/DDR5 support make it a practical mobile processor. It launched with a $309 MSRP and targets a completely different market segment. For a laptop or compact system where power draw matters and heavy multi-threaded throughput is unnecessary, the i3-1305U fits. But it cannot compete with the EPYC 7D12 on any recorded metric.

Buyers should choose based on platform and workload. Server and workstation deployments that need massive core counts, large cache, ECC memory, and extensive PCIe lanes should use the EPYC 7D12. Mobile systems that need low power consumption and integrated graphics should use the i3-1305U. The benchmark results leave no ambiguity about which processor is faster; they only leave the question of which type of machine you are building.