AMD EPYC 7451 vs Intel Atom x7433RE Comparison

Head-to-Head Benchmarks

The comparison between the AMD EPYC 7451 and the Intel Atom x7433RE is not a close contest in any shared benchmark. Across five Cinebench tests, the EPYC 7451 wins every round, and the margin is consistently massive. The data shows a pattern where the EPYC 7451 delivers roughly 4.8 times the performance of the Atom x7433RE in every test they share.

In Cinebench R15 multi-core, the EPYC 7451 scores 2061 against 356 for the Atom x7433RE, a delta of 478.9 percent. The R20 multi-core test shows the same story: 8589 versus 1484, a 478.8 percent advantage. Even in single-core workloads, where the Atom's higher boost clock might suggest some competitiveness, the EPYC 7451 dominates. Cinebench R20 single-core shows 1212 versus 209, a 479.9 percent delta. Cinebench R23 multi-core mirrors this with 20450 versus 3535 (478.5 percent), and R23 single-core shows 2887 versus 499 (478.6 percent).

The consistency of the delta across all five tests is striking. Whether the workload is single-threaded or multi-threaded, the relative gap remains nearly identical, hovering around 478 to 480 percent. This indicates a fundamental difference in per-core capability, not just a core-count advantage. The Atom x7433RE does have a higher boost clock (3.40 GHz versus 3.20 GHz), but the EPYC 7451's Zen architecture delivers far more instructions per clock, making the clock speed advantage irrelevant in practice.

The Atom x7433RE does not appear in the head-to-head list for Cinebench R15 single-core, which is absent from the shared benchmark set. However, the pattern from the other tests is unambiguous. The EPYC 7451 wins all five head-to-head benchmarks, with zero wins for the Atom x7433RE.

FAQ

Q: Which processor is faster in multi-threaded workloads?

A: The AMD EPYC 7451 is dramatically faster. In Cinebench R23 multi-core, it scores 20450 versus 3535 for the Intel Atom x7433RE, a 478.5 percent advantage. The R20 multi-core test shows 8589 versus 1484, and R15 multi-core shows 2061 versus 356.

Q: Does the Atom x7433RE's higher boost clock help it win any benchmarks?

A: No. Despite a 3.40 GHz boost clock versus 3.20 GHz for the EPYC 7451, the Atom loses every single-core test. Cinebench R23 single-core shows 2887 for the EPYC versus 499 for the Atom, a 478.6 percent gap. The R20 single-core test shows 1212 versus 209.

Q: How do these processors compare in their average benchmark scores?

A: The EPYC 7451 has an average benchmark score of 5915, while the Atom x7433RE averages 5601. Interestingly, both sit at the 61st percentile among all CPUs in the database, despite the huge performance difference in their shared tests.

Q: What are the closest rivals for each processor according to the database?

A: The EPYC 7451's nearest rival is the Intel Core i9-9920X with an average score of 5917 (0 percent delta), followed by the Intel Xeon W-2170B at 5985 (-1.2 percent), the AMD EPYC 7401P at 5814 (1.7 percent), and the Intel Xeon E-2388G at 5805 (1.9 percent). The Atom x7433RE's nearest rival is the Intel Core i7-12700T at 5606 (-0.1 percent), followed by the AMD Ryzen 7 PRO 3700 at 5610 (-0.2 percent), the Intel Core i9-11900KB at 5587 (0.3 percent), and the Intel Celeron G6900 at 5561 (0.7 percent).

Q: Does the Atom x7433RE have any benchmark results that the EPYC 7451 lacks?

A: Yes. The Atom x7433RE has PassMark results for data compression (43671), data encryption (3029), extended instructions (2157), find prime numbers (19), floating point math (8582), integer math (13054), multithread (4159), physics (323), random string sorting (5399), and single thread (1568). The EPYC 7451 has no PassMark results in the database.

Q: Which processor has more cores and threads?

A: The AMD EPYC 7451 has 24 cores and 48 threads, while the Intel Atom x7433RE has 4 cores and 4 threads. This is a six-fold difference in core count and a twelve-fold difference in thread count.

Architecture Differences

The architectural divide between these two processors is fundamental. The AMD EPYC 7451 uses the Zen architecture with the Naples codename, built on a 14 nm process at GlobalFoundries. It belongs to the EPYC 7001 series and the EPYC (Zen (Naples)) generation. The chip contains 4,800 million transistors on a 213 mm² die. Each core has 96 KB of L1 cache and 512 KB of L2 cache, with a shared 64 MB L3 cache.

The Intel Atom x7433RE uses the Amston Lake architecture with the Gracemont microarchitecture, built on a 10 nm process at Intel. It belongs to the Atom (Gracemont) generation. Each core has 96 KB of L1 cache, but the L2 cache is 2 MB shared across all cores, and the L3 cache is 6 MB shared. The transistor count and die size are not recorded in the database.

Memory architecture differs substantially. The EPYC 7451 supports DDR4 memory with an eight-channel memory bus and a memory bandwidth of 170.6 GB/s. The Atom x7433RE supports both DDR4 and DDR5, but with a single-channel memory bus and a memory bandwidth of only 38.4 GB/s. The EPYC 7451 supports ECC memory; the Atom x7433RE does not.

PCIe capabilities also diverge. The EPYC 7451 uses PCIe Gen 3, while the Atom x7433RE also uses PCIe Gen 3 but with only 9 lanes from the CPU. The EPYC 7451 has no integrated graphics; the Atom x7433RE includes UHD Graphics 32EU. The market segments reflect this: the EPYC 7451 is a Server/Workstation part, while the Atom x7433RE is a Mobile part.

Specification Differences

The specification sheet shows several direct differences between the two processors. The EPYC 7451 has 24 cores and 48 threads; the Atom x7433RE has 4 cores and 4 threads. Base clocks differ: 2.30 GHz for the EPYC versus 1.50 GHz for the Atom. Boost clocks are closer: 3.20 GHz versus 3.40 GHz. The TDP is dramatically different: 180 watts for the EPYC versus 9 watts for the Atom.

Sockets are incompatible: AMD Socket SP3 for the EPYC versus Intel BGA 1264 for the Atom. The EPYC 7451 has an unlocked multiplier; the Atom x7433RE does not. The process node differs: 14 nm for the EPYC versus 10 nm for the Atom. The EPYC 7451 uses DDR4 memory with eight channels and 170.6 GB/s bandwidth; the Atom uses DDR4 and DDR5 with a single channel and 38.4 GB/s bandwidth. The EPYC supports ECC memory; the Atom does not. The EPYC has no integrated graphics; the Atom has UHD Graphics 32EU.

Release dates differ significantly: the EPYC 7451 launched on 2017-06-28, while the Atom x7433RE launched on 2024-04-07. The EPYC 7451 has a part number of PS7451BDVHCAF; the Atom x7433RE has a part number of SRNEQ. The Atom has a launch MSRP of $63; the EPYC has no recorded launch MSRP.

The Verdict

The benchmark data makes the choice straightforward for raw performance. The AMD EPYC 7451 outperforms the Intel Atom x7433RE by roughly 479 percent in every shared Cinebench test. If the workload is CPU-intensive and the system can accommodate a 180-watt processor, the EPYC 7451 is the clear choice. Its 24 cores and 48 threads, combined with 64 MB of L3 cache and eight-channel memory, position it for server and workstation tasks.

The Intel Atom x7433RE serves a completely different purpose. Its 9-watt TDP, single-channel memory, and mobile market segment suggest it is designed for low-power embedded or edge applications where performance is secondary to efficiency. The data shows it is not competitive with the EPYC 7451 in any shared benchmark, but it does have PassMark results that the EPYC lacks, covering data compression, encryption, and other specialized workloads.

Both processors sit at the 61st percentile among all CPUs in the database, but this is misleading. The EPYC 7451's percentile reflects its standing among server-class parts, while the Atom's percentile reflects its standing among all parts including low-power mobile chips. The average benchmark scores tell a similar story: 5915 for the EPYC versus 5601 for the Atom, a gap that is surprisingly small given the head-to-head results. This is because the Atom's PassMark scores, particularly data compression at 43671, pull its average up.

The verdict depends entirely on the use case. For multi-threaded compute, the EPYC 7451 is overwhelmingly superior. For low-power, fanless, or battery-operated systems, the Atom x7433RE has no direct competitor in this comparison. The EPYC 7451 is a server workhorse; the Atom is an embedded efficiency part.

Where Each One Wins

The AMD EPYC 7451 wins every benchmark that both processors share. That includes all five Cinebench tests: R15 multi-core (2061 versus 356), R20 multi-core (8589 versus 1484), R20 single-core (1212 versus 209), R23 multi-core (20450 versus 3535), and R23 single-core (2887 versus 499). These results cover both single-threaded and multi-threaded workloads, indicating that the EPYC's architecture is superior in every measured dimension.

The Intel Atom x7433RE wins in areas where the EPYC 7451 has no recorded data. The Atom has PassMark results for data compression (43671), data encryption (3029), extended instructions (2157), find prime numbers (19), floating point math (8582), integer math (13054), multithread (4159), physics (323), random string sorting (5399), and single thread (1568). These results suggest the Atom can handle specific workloads, but there is no basis for comparison with the EPYC.

The Atom also wins on power efficiency. Its 9-watt TDP versus the EPYC's 180-watt TDP represents a twenty-fold difference in power consumption. For applications where heat dissipation and power draw are critical constraints, the Atom is the only viable choice. The Atom also includes integrated graphics, which the EPYC lacks, making it suitable for systems that need display output without a discrete GPU.

The EPYC 7451 wins on memory bandwidth. Its 170.6 GB/s versus the Atom's 38.4 GB/s is a 4.4-fold advantage, which matters for memory-intensive workloads. The EPYC also supports ECC memory, which the Atom does not, making it suitable for error-sensitive server applications. The EPYC's 24 cores and 48 threads versus the Atom's 4 cores and 4 threads gives it a massive advantage in highly parallel workloads.

For a builder choosing between these two, the decision comes down to the system's purpose. A server or workstation that needs maximum compute throughput should use the EPYC 7451. A low-power embedded system or a fanless industrial PC should use the Atom x7433RE. There is no middle ground in the data; these processors occupy opposite ends of the performance and efficiency spectrum.