AMD EPYC 7773X vs Intel Core i5-1345U Comparison

Head-to-Head Benchmarks

The benchmark data is unambiguous: the AMD EPYC 7773X dominates the Intel Core i5-1345U across every recorded Cinebench test. Out of six head-to-head comparisons, the EPYC 7773X wins all six, with the Intel part failing to secure a single victory. The margins are substantial, reflecting the fundamental difference in positioning between a mobile processor and a server/workstation chip.

In Cinebench R23 multicore, the EPYC 7773X scores 77,639 against the i5-1345U's 7,724. That is a delta of -90.1% from the Intel part's perspective, meaning the AMD chip delivers roughly ten times the multicore throughput. The single-core gap is narrower but still decisive: the EPYC 7773X posts 10,960 in Cinebench R23 single-core, while the i5-1345U manages 1,724, a -84.3% delta. Even in the less demanding R15 and R20 workloads, the pattern holds. In Cinebench R20 multicore, the EPYC scores 32,608 versus 4,942, a -84.8% delta. In R20 single-core, it is 4,603 against 697, a -84.9% delta. The smallest relative gap appears in R15 multicore, where the EPYC's 7,825 still leaves the i5-1345U's 1,311 trailing by -83.2%.

The consistent 78% to 90% deltas across all tests indicate that the EPYC 7773X is not merely faster in a single benchmark; it is categorically superior in every threaded and single-threaded workload recorded. The i5-1345U's best showing is in R15 single-core, where it trails by -78.3% (240 versus 1,104), but even that "best" result is a massive deficit. The data does not support any scenario where the Intel mobile chip closes the gap to a competitive level.

FAQ

Q: Which processor wins in Cinebench R23 multicore?

A: The AMD EPYC 7773X scores 77,639, compared to the Intel Core i5-1345U's 7,724. The EPYC leads by 90.1% in this workload.

Q: Is the Intel Core i5-1345U competitive in single-core performance?

A: No. In Cinebench R23 single-core, the i5-1345U scores 1,724, while the EPYC 7773X scores 10,960. The Intel part trails by 84.3% in that test.

Q: How many benchmark wins does each processor have in the head-to-head comparison?

A: The AMD EPYC 7773X records 6 wins, and the Intel Core i5-1345U records 0 wins across all six tested Cinebench scenarios.

Q: What is the average benchmark score for each processor?

A: The Intel Core i5-1345U has an average benchmark score of 19,411, while the AMD EPYC 7773X has an average of 18,979. Both sit at the 73rd percentile among all CPUs in the database.

Q: Does the EPYC 7773X have a higher core count than the i5-1345U?

A: Yes. The EPYC 7773X has 64 cores and 128 threads, versus 10 cores and 12 threads for the i5-1345U.

Q: Which processor supports ECC memory?

A: The AMD EPYC 7773X supports ECC memory. The Intel Core i5-1345U does not.

Where Each One Wins

The AMD EPYC 7773X wins every benchmark category recorded in the head-to-head data. There is no test in the comparison where the Intel Core i5-1345U comes out ahead. The EPYC's advantages are most pronounced in multicore workloads: Cinebench R23 multicore shows a 90.1% lead, and R20 multicore shows an 84.8% lead. Even in single-core tests, where mobile chips often close the gap, the EPYC still leads by 78.3% to 84.9% depending on the Cinebench version.

For use-case selection, the data points clearly toward the EPYC 7773X for any workload that relies on Cinebench-style rendering, physics simulation, or heavily threaded compute. The i5-1345U, by contrast, offers no benchmark advantage in any recorded test. However, the Intel part's market segment is mobile, and its integrated graphics (Iris Xe Graphics 80EU) provide capabilities the EPYC lacks entirely. The EPYC has no integrated graphics, so any system built around it requires a discrete GPU for display output. The i5-1345U is a mobile processor with a 15 W TDP, while the EPYC is a server/workstation part with a 280 W TDP. If power envelope or integrated display output is the primary constraint, the i5-1345U has a structural advantage, but the raw performance data favors the EPYC in every measured benchmark.

Specification Differences

The two processors differ across nearly every core specification. The Intel Core i5-1345U has 10 cores and 12 threads, while the AMD EPYC 7773X has 64 cores and 128 threads. Base clocks differ: the i5-1345U runs at 1.60 GHz, and the EPYC at 2.20 GHz. Boost clocks also favor the AMD part, with 3.50 GHz versus 4.70 GHz for the Intel chip. Note that the Intel part has a higher boost clock, but the EPYC still wins all single-core benchmarks, indicating architectural efficiency differences beyond raw clock speed.

Power consumption diverges sharply: the i5-1345U has a TDP of 15 W, while the EPYC 7773X has a TDP of 280 W. Socket compatibility is entirely different: the Intel chip uses Intel BGA 1744, and the AMD part uses AMD Socket SP3. Memory support differs as well: the i5-1345U supports DDR4 and DDR5 over a dual-channel bus, whereas the EPYC supports only DDR4 but over an eight-channel bus with a recorded bandwidth of 204.8 GB/s. ECC memory is supported only on the EPYC. PCIe capabilities also differ, with the i5-1345U offering Gen 4 with 8 lanes (CPU only) and the EPYC offering Gen 4 with 128 lanes (CPU only). The Intel part includes integrated Iris Xe Graphics 80EU, while the EPYC has no integrated graphics. The launch MSRP for the i5-1345U is $309, and for the EPYC 7773X it is $8800.

Architecture Differences

The Intel Core i5-1345U is built on Raptor Lake, specifically the Raptor Lake-U codename, using a 10 nm process node from Intel's own foundry. The AMD EPYC 7773X is built on Zen 3, under the Milan-X codename, using a 7 nm process node from TSMC. The process node difference is notable: 10 nm versus 7 nm, and the EPYC's transistor count is recorded at 33,200 million, with a die size of 8x 81 mm². The Intel chip does not have recorded transistor or die size data.

Cache architectures are strikingly different. The i5-1345U has 80 KB of L1 cache per core, 1.25 MB of L2 per core, and 12 MB of shared L3. The EPYC 7773X has 64 KB of L1 per core, 512 KB of L2 per core, and a massive 768 MB of shared L3. That 768 MB L3 is a defining feature of the Milan-X lineup, and it is directly reflected in the benchmark results, particularly in the multicore scores where the EPYC's 90.1% lead over the i5-1345U in R23 multicore is the largest recorded delta. The EPYC also belongs to the EPYC 7003 series, whereas the i5-1345U has no series designation. Both processors are currently marked as Active in production status, and neither has an unlocked multiplier.

The Verdict

The data supports a clear verdict: the AMD EPYC 7773X is the superior processor in every recorded benchmark. It wins all six head-to-head tests, with leads ranging from 78.3% to 90.1%. The Intel Core i5-1345U does not win a single comparison. For users selecting a processor based on Cinebench performance, the EPYC 7773X is the only choice.

However, the selection depends on the use case. The i5-1345U is a mobile processor with a 15 W TDP, integrated graphics, and support for both DDR4 and DDR5 memory. It is designed for laptops and compact mobile systems where power draw and integrated display output are critical. The EPYC 7773X is a server/workstation chip with a 280 W TDP, no integrated graphics, ECC memory support, and 128 PCIe Gen 4 lanes. It is designed for enterprise compute, virtualization, and heavily threaded workloads where the 64-core, 128-thread configuration and 768 MB L3 cache deliver the massive multicore advantage seen in the data.

If the workload is Cinebench rendering, multithreaded compute, or any benchmark in the recorded set, the EPYC 7773X wins outright. If the requirement is a low-power mobile platform with integrated graphics, the i5-1345U offers that capability, but it comes with a performance penalty that is impossible to ignore: it trails the EPYC by 83% to 90% in every measured test. The percentile data shows both processors sit at the 73rd percentile among all CPUs, and the EPYC's average benchmark score of 18,979 is actually slightly lower than the i5-1345U's 19,411, despite the EPYC's overwhelming head-to-head wins. This discrepancy reflects the different benchmark suites recorded for each chip: the i5-1345U has PassMark scores included, while the EPYC has Geekbench scores, which are not directly comparable in the average.

The verdict is straightforward. For raw performance in the recorded Cinebench tests, choose the AMD EPYC 7773X. For a mobile, low-power system with integrated graphics, the Intel Core i5-1345U is the only one of the two that fits that form factor, but the data shows no performance scenario where it competes with the EPYC.