AMD EPYC 7643 vs Intel Core Ultra 5 226V Comparison

Head-to-Head Benchmarks

The benchmark data shows a complete sweep for the AMD EPYC 7643 across all six shared Cinebench tests. The Intel Core Ultra 5 226V does not win a single head-to-head comparison. The margins are substantial in every discipline, but they are largest in multi-core workloads where the EPYC's massive thread count comes into play.

In Cinebench R23 multi-core, the AMD EPYC 7643 scores 64642 against the Intel Core Ultra 5 226V's 9848. That is a delta of -84.8% for the Intel part, meaning the EPYC delivers more than six times the multi-core performance. The gap is similarly stark in Cinebench R20 multi-core: 27149 versus 6381, a -76.5% delta. Cinebench R15 multi-core shows 6515 versus 1501, a -77% delta.

Single-core results are closer in percentage terms, but still favor the EPYC decisively. In Cinebench R23 single-core, the EPYC scores 9126 against the Intel's 1744, a -80.9% delta. Cinebench R20 single-core sees 3832 versus 900, a -76.5% delta. Cinebench R15 single-core shows 919 versus 267, a -70.9% delta. These are not marginal differences; the EPYC leads by roughly three to five times in every single-core test, which is notable given that single-core performance is often considered a strong suit of modern mobile processors.

The Intel Core Ultra 5 226V does have its own benchmark identity outside the head-to-head set. Its Passmark single-thread score is 3754, and its Geekbench single-core score is 1930. Its Cinebench R23 single-core score of 1744 places it well behind the EPYC's 9126, but within its own peer group, it sits at the 73rd percentile of all CPUs. The EPYC also sits at the 73rd percentile, so both parts rank identically in overall CPU percentile despite the enormous raw performance gap.

The average benchmark score for the Intel part is 19368, while the EPYC's average is 18697. This is an interesting inversion: the EPYC wins every head-to-head Cinebench test, yet its average score across its full benchmark suite is slightly lower. This is because the EPYC only has Cinebench data recorded in the database, while the Intel part includes Passmark and Geekbench results, which pull its average upward. The EPYC's nearest rivals are mainstream desktop and mobile parts like the Intel Core i5-12400, Intel Core i7-1355U, and AMD Ryzen AI 5 330, all within 1% of its average score. The Intel Core Ultra 5 226V's nearest rivals include the AMD Ryzen 5 7533HS, Intel Core i5-1345U, Intel Core i7-8700K, and Intel Core i7-10700F, all within 0.7% of its average.

Architecture Differences

The two processors come from completely different design philosophies. The Intel Core Ultra 5 226V is built on Lunar Lake architecture, using a 3 nm process node from TSMC. It is a mobile-focused part with 8 cores and 8 threads, no hyper-threading enabled in the recorded data. The AMD EPYC 7643 is a Zen 3 Milan server processor, built on a 7 nm process node, also from TSMC. It has 48 cores and 96 threads, making it a 6x core count advantage and a 12x thread count advantage over the Intel part.

Cache configurations differ dramatically. The Intel Core Ultra 5 226V has 192 KB of L1 per core, 2.5 MB of L2 per core, and 8 MB of shared L3. The EPYC 7643 has 64 KB of L1 per core, 512 KB of L2 per core, and a massive 256 MB of shared L3. That is 32 times more L3 cache on the EPYC, a critical factor for server workloads that repeatedly access large datasets. The EPYC also lists 33,200 million transistors spread across 8 dies, each 81 mm², while the Intel part does not have transistor or die size data recorded.

Memory support is another major divergence. The Intel Core Ultra 5 226V uses dual-channel memory, with support that the database lists as dependent on the motherboard. The EPYC 7643 uses eight-channel DDR4 memory with a recorded bandwidth of 204.8 GB/s. The EPYC also supports ECC memory, while the Intel part does not. PCIe connectivity is also lopsided: the Intel part offers Gen 5 with 4 CPU-only lanes, while the EPYC offers Gen 4 with 128 CPU-only lanes.

The Intel part includes integrated graphics in the form of Arc 130V, while the EPYC has no integrated graphics recorded. The Intel part is classified as mobile, with a 17 W TDP, while the EPYC is a server and workstation part with a 225 W TDP and a launch MSRP of $4995. The Intel part was released on 2024-09-23, while the EPYC was released on 2021-03-14, making the EPYC older by several years yet still dominant in raw throughput.

The Verdict

The data is unambiguous. The AMD EPYC 7643 wins every single head-to-head benchmark against the Intel Core Ultra 5 226V, with deltas ranging from -70.9% to -84.8% in favor of the EPYC. If the workload is multi-threaded rendering, the EPYC is the only rational choice. Its Cinebench R23 multi-core score of 64642 dwarfs the Intel's 9848, and its 48 cores and 96 threads are simply in a different performance class.

The Intel Core Ultra 5 226V is not without merit, but its merits are not visible in the head-to-head data. It belongs to a mobile segment with a 17 W TDP, integrated Arc 130V graphics, and a 3 nm process node. It is designed for efficiency and portability, not for raw compute throughput. The EPYC's 225 W TDP and server socket make it unsuitable for any mobile application, and its lack of integrated graphics means it requires a discrete GPU for display output.

For a server, workstation, or heavy rendering environment, the EPYC 7643 is the clear choice. For a thin-and-light laptop or any power-constrained mobile device, the Intel Core Ultra 5 226V is the only viable option of the two, simply because the EPYC cannot physically fit into that use case. The data shows that the EPYC's single-core performance is also superior, which is surprising given the Intel part's newer process node and higher boost clock of 4.50 GHz versus the EPYC's 3.60 GHz. The EPYC's Zen 3 architecture delivers higher single-core scores despite a lower boost clock, which suggests architectural efficiency rather than raw clock speed drives its performance.

Specification Differences

The two processors differ in nearly every specification category. The Intel Core Ultra 5 226V has 8 cores and 8 threads, while the AMD EPYC 7643 has 48 cores and 96 threads. Base clocks are 2.10 GHz for the Intel and 2.30 GHz for the EPYC, but boost clocks favor the Intel at 4.50 GHz versus 3.60 GHz. TDP is drastically different: 17 W for the Intel, 225 W for the EPYC.

Process nodes are 3 nm for the Intel and 7 nm for the EPYC, both from TSMC. The EPYC has 33,200 million transistors across 8x 81 mm² dies, while the Intel has no transistor or die size data. L1 cache is 192 KB per core on the Intel versus 64 KB per core on the EPYC. L2 is 2.5 MB per core on the Intel versus 512 KB per core on the EPYC. L3 is 8 MB shared on the Intel versus 256 MB shared on the EPYC.

Memory channels are dual-channel for the Intel and eight-channel for the EPYC. The EPYC supports DDR4 with 204.8 GB/s bandwidth, while the Intel's memory support is listed as unknown and motherboard-dependent. ECC memory is supported only on the EPYC. PCIe is Gen 5 with 4 lanes on the Intel, Gen 4 with 128 lanes on the EPYC. The Intel has Arc 130V integrated graphics, the EPYC has none. Sockets are Intel BGA 2833 for the Intel and AMD Socket SP3 for the EPYC. Both parts are locked, meaning no unlocked multiplier.

FAQ

Q: Which processor has more cores and threads?

A: The AMD EPYC 7643 has 48 cores and 96 threads, while the Intel Core Ultra 5 226V has 8 cores and 8 threads.

Q: Does the Intel Core Ultra 5 226V win any head-to-head benchmarks against the EPYC 7643?

A: No. The EPYC 7643 wins all six recorded head-to-head tests, with deltas from -70.9% to -84.8% against the Intel part.

Q: Which processor has the higher boost clock?

A: The Intel Core Ultra 5 226V has a boost clock of 4.50 GHz, while the AMD EPYC 7643 has a boost clock of 3.60 GHz. Despite this, the EPYC wins all single-core benchmarks.

Q: What is the L3 cache difference between the two?

A: The Intel Core Ultra 5 226V has 8 MB of shared L3 cache, while the AMD EPYC 7643 has 256 MB of shared L3 cache.

Q: Which processor supports ECC memory?

A: Only the AMD EPYC 7643 supports ECC memory. The Intel Core Ultra 5 226V does not.

Q: What are the market segments for each processor?

A: The Intel Core Ultra 5 226V is classified as a mobile processor, while the AMD EPYC 7643 is classified as a server and workstation processor.

Where Each One Wins

The AMD EPYC 7643 wins in every measured benchmark category. Multi-core rendering is its strongest domain, with Cinebench R23 multi-core showing a 64642 score versus 9848 for the Intel, a -84.8% delta. Cinebench R20 multi-core shows 27149 versus 6381, and Cinebench R15 multi-core shows 6515 versus 1501. Even single-core tests favor the EPYC, with Cinebench R23 single-core at 9126 versus 1744, Cinebench R20 single-core at 3832 versus 900, and Cinebench R15 single-core at 919 versus 267. The EPYC's eight-channel memory and 256 MB L3 cache make it suited for memory-intensive server workloads, and its 128 PCIe Gen 4 lanes provide massive expansion capability.

The Intel Core Ultra 5 226V wins in areas that are not covered by the head-to-head benchmark set. Its 17 W TDP makes it suitable for battery-powered mobile devices, and its integrated Arc 130V graphics eliminate the need for a discrete GPU in basic display scenarios. Its 3 nm process node from TSMC gives it a manufacturing advantage in power efficiency, and its higher boost clock of 4.50 GHz suggests short-burst responsiveness, even though the benchmark data does not reflect a win in any recorded test. The Intel part's Passmark scores, including a single-thread score of 3754 and a floating point math score of 52270, show it is a capable mobile processor, but these results do not appear in the head-to-head comparison.

For a user deciding between these two, the choice comes down to the physical platform. The EPYC 7643 requires a server motherboard with Socket SP3, 225 W cooling, and eight-channel DDR4 memory. It offers no integrated graphics and is built for throughput, not efficiency. The Intel Core Ultra 5 226V is a BGA 2833 mobile chip with dual-channel memory and integrated graphics, designed to fit inside a laptop chassis. The benchmark data gives the EPYC every performance win, but the Intel part is the only one that can exist in a mobile form factor. The recorded data does not support any scenario where the Intel part outperforms the EPYC in compute, so the EPYC is the pick for any performance-first build, while the Intel part is the pick for any power-constrained mobile build.