AMD EPYC 7643 vs Intel Core i5-13420H Comparison

Where Each One Wins

The data draws an unusually clean line between these two processors. The AMD EPYC 7643 wins every single head-to-head benchmark in the FACT PACK, taking all six comparison tests. The Intel Core i5-13420H does not win a single direct comparison. That does not mean the Intel part is without merit — it simply wins in a different arena that the head-to-head list does not capture.

The EPYC 7643 is the clear winner for any workload that scales with core count and cache capacity. Its 48 cores and 96 threads give it a massive advantage in multi-threaded rendering, and the benchmark results confirm this. In Cinebench R23 multi-core, the EPYC scores 64,642 against the i5-13420H’s 11,084 — a 483.2% delta. That is not a marginal lead; it is a generational gap in throughput. For a server/workstation CPU, this is exactly the kind of result that matters.

The Intel Core i5-13420H, on the other hand, wins in the mobile segment where it exists. It is a 45W part with 8 cores and 12 threads, designed for laptops. Its benchmark scores, while far below the EPYC, are respectable for its class. It hits a 5,587 in 3DMark max threads and a 3,396 in PassMark single-thread. The EPYC has no equivalent single-thread test in the FACT PACK, but the Intel chip’s 4.60 GHz boost clock suggests it can handle everyday tasks with responsiveness that a server CPU might not prioritize.

Where each one wins, then, is a question of context. The EPYC wins on raw compute density and multi-core muscle. The i5-13420H wins on mobility, power efficiency, and integrated graphics — the Iris Xe Graphics 80EU means it can drive a display without a discrete GPU, something the EPYC cannot do at all since it has no integrated graphics listed.

Architecture Differences

The two chips come from opposite ends of the design spectrum. The AMD EPYC 7643 is built on TSMC’s 7 nm process and uses the Zen 3 architecture, codenamed Milan. It is part of the EPYC 7003 series, designed for the AMD Socket SP3 platform. The Intel Core i5-13420H uses Intel’s 10 nm process with the Raptor Lake architecture, codenamed Raptor Lake-H, and mounts on Intel BGA 1744.

Core counts could not be more different. The EPYC packs 48 cores and 96 threads, while the i5-13420H has 8 cores and 12 threads. That 8-core part uses a hybrid configuration typical of Raptor Lake, though the FACT PACK does not break down performance versus efficiency cores. The EPYC’s base clock is 2.30 GHz with a 3.60 GHz boost; the Intel part runs at 2.10 GHz base but boosts to 4.60 GHz. The higher boost clock on the Intel chip reflects its mobile focus — short bursts of speed for responsive single-threaded work.

Cache layouts highlight the server versus mobile split. The EPYC has 64 KB L1 and 512 KB L2 per core, plus a massive 256 MB shared L3. The i5-13420H has 80 KB L1 and 2 MB L2 per core, but only 12 MB shared L3. The EPYC’s 256 MB L3 is the kind of cache that keeps 48 cores fed with data, while the Intel chip’s smaller cache suits a mobile workload with fewer threads.

Memory support also diverges sharply. The EPYC uses DDR4 with an eight-channel memory bus and 204.8 GB/s bandwidth, plus ECC support. The i5-13420H supports both DDR4 and DDR5 but only on a dual-channel bus, with no memory bandwidth figure listed and no ECC support. PCIe lanes tell the same story: the EPYC offers Gen 4 with 128 lanes, while the Intel part has Gen 5 but only 8 lanes. That is a server-grade I/O fabric versus a laptop connection.

Process node, foundry, and die size further separate them. The EPYC is 7 nm from TSMC with 33,200 million transistors across 8x 81 mm² dies. The i5-13420H is 10 nm from Intel, with no transistor or die-size data in the FACT PACK. The EPYC is a multi-die server chip; the Intel part is a monolithic mobile processor.

The Verdict

The choice between these two is not a choice at all for most builders — it is a question of which platform you are targeting. The AMD EPYC 7643 is a server/workstation processor with a launch MSRP of $4995. It is meant for socket SP3 motherboards, eight-channel memory, and workloads that can use 48 cores and 96 threads. The Intel Core i5-13420H is a mobile processor for laptops, with a 45W TDP, soldered to BGA 1744, and no launch MSRP listed.

If you are building a rack server or a high-end workstation, the EPYC 7643 is the only option here. Its benchmark results show dominance in every Cinebench test, with multi-core scores that are 274.9% to 483.2% ahead of the Intel part. The data shows a processor that is in a different performance class entirely.

If you are buying a laptop, the i5-13420H is the only option. The EPYC cannot go into a laptop — it has no integrated graphics, a 225W TDP, and an SP3 socket. The Intel part’s integrated Iris Xe Graphics 80EU means it can run a display without external hardware, and its 4.60 GHz boost clock gives it strong single-threaded performance for its class.

The verdict is platform-first. The data does not show a competitive matchup; it shows two processors for two completely different markets. The EPYC wins every benchmark it shares with the Intel chip, but the Intel chip wins in contexts the EPYC cannot enter.

FAQ

Q: Which processor has more cores?

A: The AMD EPYC 7643 has 48 cores and 96 threads, while the Intel Core i5-13420H has 8 cores and 12 threads.

Q: Which processor is faster in Cinebench R23 multi-core?

A: The AMD EPYC 7643 scores 64,642 versus the Intel Core i5-13420H’s 11,084, a 483.2% advantage for the AMD chip.

Q: Does the Intel Core i5-13420H have integrated graphics?

A: Yes, it has Iris Xe Graphics 80EU. The AMD EPYC 7643 has no integrated graphics listed in the data.

Q: What memory types does each processor support?

A: The AMD EPYC 7643 supports DDR4 with an eight-channel bus and ECC. The Intel Core i5-13420H supports DDR4 and DDR5 with a dual-channel bus and no ECC support.

Q: Which processor has a higher boost clock?

A: The Intel Core i5-13420H boosts to 4.60 GHz, while the AMD EPYC 7643 boosts to 3.60 GHz.

Q: Are these processors in the same market segment?

A: No. The AMD EPYC 7643 is a Server/Workstation processor, and the Intel Core i5-13420H is a Mobile processor.

Head-to-Head Benchmarks

The head-to-head benchmark list contains six tests, and the AMD EPYC 7643 wins all six. The smallest margin is in Cinebench R15 multi-core, where the EPYC scores 6,515 against the Intel chip’s 1,738 — a 274.9% delta. The largest margin is in Cinebench R23 multi-core, with the EPYC at 64,642 versus 11,084, a 483.2% delta.

Single-core tests show an even more lopsided ratio. In Cinebench R15 single-core, the EPYC scores 919 versus the i5-13420H’s 238, a 286.1% delta. In Cinebench R20 single-core, the EPYC scores 3,832 versus 848, a 351.9% delta. Cinebench R23 single-core follows the same pattern: 9,126 versus 1,689, a 440.3% delta. These single-core results are surprising given the Intel chip’s higher boost clock — the data shows the EPYC’s Zen 3 architecture delivering far more work per clock in these tests.

Multi-core tests show the EPYC’s core-count advantage in full effect. Cinebench R20 multi-core gives the EPYC 27,149 against the Intel chip’s 6,013, a 351.5% delta. The R23 multi-core result of 483.2% is the single biggest win in the entire comparison. The Intel part’s best multi-core result outside the head-to-head list is 5,587 in 3DMark max threads, which the EPYC does not have a comparable score for in the FACT PACK.

The wins are comprehensive but not uniform. The EPYC’s single-core margins (286.1% to 440.3%) are actually larger in percentage terms than some multi-core margins, which suggests the Zen 3 architecture has a per-thread efficiency edge over Raptor Lake in these specific Cinebench workloads. The multi-core margins grow with each newer Cinebench version, from 274.9% in R15 to 483.2% in R23, indicating the EPYC scales better with the increasing complexity of the multi-core test.

Specification Differences

The two processors differ in nearly every specification field. The AMD EPYC 7643 uses a Zen 3 architecture on TSMC’s 7 nm process, while the Intel Core i5-13420H uses Raptor Lake on Intel’s 10 nm process. The EPYC has 48 cores and 96 threads; the Intel chip has 8 cores and 12 threads. Base clocks are 2.30 GHz and 2.10 GHz, boost clocks are 3.60 GHz and 4.60 GHz, and TDPs are 225W and 45W respectively.

Cache configurations differ fundamentally. The EPYC has 64 KB L1 and 512 KB L2 per core, with 256 MB shared L3. The Intel part has 80 KB L1 and 2 MB L2 per core, with 12 MB shared L3. The L3 difference is 256 MB versus 12 MB — a 21x gap in favor of the EPYC.

Memory support is another major split. The EPYC uses DDR4 on an eight-channel bus with 204.8 GB/s bandwidth and ECC support. The i5-13420H supports DDR4 and DDR5 on a dual-channel bus, with no bandwidth figure and no ECC. PCIe connectivity also differs: the EPYC has Gen 4 with 128 lanes, while the Intel chip has Gen 5 with 8 lanes.

Other fields differ as well. The EPYC has no integrated graphics; the Intel part has Iris Xe Graphics 80EU. The EPYC uses AMD Socket SP3, the Intel chip uses Intel BGA 1744. The EPYC is a Server/Workstation part with a $4995 launch MSRP; the i5-13420H is a Mobile part with no launch MSRP listed. The EPYC’s part number is 100-000000326100-100000326WOF; the Intel chip’s is SRMHX. Neither processor has an unlocked multiplier.