AMD EPYC 7643 vs Intel Core i7-9700 Comparison

The Verdict

The data is unambiguous: the AMD EPYC 7643 wins every single benchmark recorded against the Intel Core i7-9700, taking all six head-to-head tests with deltas ranging from 477.1% to 478%. The EPYC 7643 is the choice for any workload where raw multi-threaded throughput or even single-threaded Cinebench performance matters, as it leads by roughly 477% to 478% across all six Cinebench iterations. The Intel Core i7-9700, meanwhile, offers no benchmark victories in this matchup, making it unsuitable for anyone prioritizing compute density, rendering, or server-class workloads based on this data alone.

For a buyer deciding strictly from the recorded results, the EPYC 7643 is the only rational pick for server racks, virtualization hosts, or any environment that can use 48 cores and 96 threads. The i7-9700, with its 8 cores and 8 threads, is a desktop part that trails by enormous margins, so it should only be considered if the workload is extremely light and the platform constraints (Socket 1151, 65 W TDP) are mandatory. The EPYC 7643 also holds a 73rd percentile ranking versus all CPUs, slightly ahead of the i7-9700's 72nd percentile, and its average benchmark score of 18697 versus 18180 confirms a consistent edge.

Architecture Differences

The two processors come from entirely different design philosophies and nodes. The AMD EPYC 7643 is built on TSMC's 7 nm process with 33,200 million transistors spread across eight dies, each die measuring 81 mm². It uses the Zen 3 architecture (codename Milan) and belongs to the EPYC 7003 series. The Intel Core i7-9700, by contrast, is a 14 nm part fabricated by Intel, with a single die of 180.3 mm² and no transistor count provided. Its architecture is Coffee Lake, from the Coffee Lake Refresh generation.

Core and thread counts diverge sharply: the EPYC 7643 features 48 cores and 96 threads, while the i7-9700 has 8 cores and 8 threads (no Hyper-Threading). Cache design differs too, the EPYC 7643 has 64 KB L1 per core, 512 KB L2 per core, and a massive 256 MB shared L3. The i7-9700 has 64 KB L1 per core, 256 KB L2 per core, and only 12 MB shared L3. The EPYC 7643 also provides a much larger memory pipeline: eight-channel DDR4 with 204.8 GB/s peak bandwidth, versus dual-channel DDR4 with 42.7 GB/s on the i7-9700. ECC memory is supported on the EPYC 7643, but not on the i7-9700.

PCIe connectivity is another major split. The EPYC 7643 offers Gen 4 with 128 lanes (CPU only), while the i7-9700 offers Gen 3 with 16 lanes (CPU only). The i7-9700 includes integrated UHD Graphics 630, whereas the EPYC 7643 has no integrated graphics. Socket types differ as well: the EPYC 7643 uses AMD Socket SP3, and the i7-9700 uses Intel Socket 1151. The EPYC 7643 is classified as Active in production status and targets Server/Workstation, while the i7-9700 is End-of-life and targets Desktop. The EPYC 7643 launched on 2021-03-14 with a launch MSRP of $4995. The i7-9700 launched on 2019-04-22 with a launch MSRP of $333.

Head-to-Head Benchmarks

The recorded data shows a complete sweep for the AMD EPYC 7643. In Cinebench R15 multicore, the EPYC 7643 scored 6515 against the i7-9700's 1128, a delta of 477.6%. The single-core R15 test was equally lopsided: 919 versus 159, a 478% delta. Moving to Cinebench R20, the multicore result was 27149 for the EPYC 7643 and 4704 for the i7-9700, a 477.1% gap, while the single-core test showed 3832 versus 664, again 477.1%.

Cinebench R23 repeats the pattern. The EPYC 7643 posted 64642 in multicore, versus 11200 for the i7-9700, a 477.2% delta. The single-core R23 test yielded 9126 for the EPYC 7643 and 1581 for the i7-9700, another 477.2% delta. There are no benchmarks where the i7-9700 wins, so the EPYC 7643 takes all six head-to-head comparisons.

The scale of the victory is notable. The EPYC 7643's multicore scores are roughly 5.8 times higher than the i7-9700's across every Cinebench test, which is consistent with its core count advantage. Even in single-core tests, where clock speed often dominates, the EPYC 7643's 2.30 GHz base and 3.60 GHz boost are slower than the i7-9700's 3.00 GHz base and 4.70 GHz boost, yet the EPYC 7643 still wins by about 477%. That result indicates the EPYC 7643's per-core efficiency in the recorded Cinebench workloads is vastly superior.

FAQ

Q: Which processor has more cores and threads?

A: The AMD EPYC 7643 has 48 cores and 96 threads, while the Intel Core i7-9700 has 8 cores and 8 threads.

Q: Does the Intel Core i7-9700 win any benchmark?

A: No. The head-to-head data shows zero wins for the i7-9700; the EPYC 7643 wins all six recorded tests.

Q: What is the memory bandwidth difference?

A: The EPYC 7643 supports eight-channel memory with 204.8 GB/s bandwidth, while the i7-9700 supports dual-channel memory with 42.7 GB/s, a substantial gap.

Q: Which processor supports ECC memory?

A: The AMD EPYC 7643 supports ECC memory, the Intel Core i7-9700 does not.

Q: What are the process nodes?

A: The EPYC 7643 is built on TSMC's 7 nm process, and the i7-9700 is built on Intel's 14 nm process.

Q: Does the EPYC 7643 have integrated graphics?

A: No, the EPYC 7643 has no integrated graphics, but the i7-9700 includes UHD Graphics 630.

Where Each One Wins

Based strictly on the benchmarks, the AMD EPYC 7643 wins in every category tested. Its six wins cover both multicore and single-core Cinebench R15, R20, and R23, meaning it is the better choice for rendering, multi-threaded workloads, and even single-threaded performance in those specific tests. The EPYC 7643's 48 cores and 96 threads, combined with its large 256 MB L3 cache and eight-channel memory, make it ideal for server classes, virtualization, heavy compute, and any workload that scales with core count.

The Intel Core i7-9700 has no recorded wins, so there is no benchmark-based use case where it outperforms the EPYC 7643. However, the i7-9700 does have advantages outside the benchmark suite, such as a much lower 65 W TDP, a smaller die, and integrated graphics, but these are not measured in the head-to-head results. Since the data shows no performance win, the i7-9700 is only a choice for a desktop platform that cannot accommodate the EPYC 7643's SP3 socket and 225 W TDP.

Specification Differences

The two processors differ in nearly every specification. The EPYC 7643 has 48 cores, 96 threads, a 2.30 GHz base clock, and a 3.60 GHz boost clock, versus the i7-9700's 8 cores, 8 threads, 3.00 GHz base, and 4.70 GHz boost. TDPs are 225 W for the EPYC 7643 and 65 W for the i7-9700. The EPYC 7643 uses AMD Socket SP3, the i7-9700 uses Intel Socket 1151.

Cache sizes show a large gap: 64 KB L1 per core and 512 KB L2 per core on the EPYC 7643, versus 64 KB L1 and 256 KB L2 on the i7-9700. L3 is 256 MB shared on the EPYC 7643, versus 12 MB shared on the i7-9700. Memory support differs: both support DDR4, but the EPYC 7643 has an eight-channel bus, the i7-9700 has a dual-channel bus. Memory bandwidth is 204.8 GB/s versus 42.7 GB/s. ECC is true on the EPYC 7643, false on the i7-9700. PCIe is Gen 4, 128 lanes on the EPYC, versus Gen 3, 16 lanes on the i7-9700.

The EPYC 7643 has no integrated graphics, while the i7-9700 has UHD Graphics 630. The EPYC 7643 is a server/workstation part, active, with a launch MSRP of $4995. The i7-9700 is a desktop part, end-of-life, with a launch MSRP of $333. The EPYC 7643 is built on 7 nm by TSMC, with 33,200 million transistors and a die size of 8x 81 mm². The i7-9700 is built on 14 nm by Intel, with no transistor count and a die size of 180.3 mm². The EPYC 7643 is an unlocked multiplier, but the i7-9700 is also unlocked, both are locked. The EPYC 7643 has 96 threads, while the i7-9700 has 8 threads, and the i7-9700 is a Coffee Lake part, while the EPYC 7643 is a Milan.