Intel Atom x7809C vs Intel Xeon Bronze 3408U Comparison

Head-to-Head Benchmarks

The benchmark data shows a clear split between the Intel Atom x7809C and the Intel Xeon Bronze 3408U. The Xeon Bronze wins the majority of head-to-head tests, taking 13 of 17 recorded comparisons, but the Atom posts decisive victories in several specialized workloads. Overall average benchmark scores favor the Atom, 12607 to 12019, though both processors sit at the 67th percentile among all CPUs tracked in the database.

In Cinebench rendering tests, the Xeon Bronze leads consistently but by a narrow margin. Across Cinebench R15, R20, and R23, both multi-core and single-core scores show the Xeon Bronze ahead by 5.6% to 5.8%. The largest gap appears in Cinebench R15 single-core, where the Xeon Bronze scores 120 against the Atom's 113, a 5.8% advantage. Multi-core results follow the same pattern: Cinebench R23 multi-core shows 8473 for the Xeon Bronze versus 7997 for the Atom, a 5.6% difference. These margins are modest, suggesting the Atom's Gracemont cores are competitive in lightly threaded rendering workloads despite the Xeon's higher power envelope.

The PassMark suite reveals where each chip excels. The Atom x7809C dominates in data compression, scoring 111525 against the Xeon Bronze's 95714, a 16.5% advantage. Data encryption shows an even larger gap: the Atom scores 7832, which is 48.5% higher than the Xeon Bronze's 5274. Integer math also favors the Atom, 28946 versus 22803, a 26.9% lead. Random string sorting completes the Atom's wins with 15728 against 12073, a 30.3% advantage. These four workloads indicate the Atom's strength in scalar integer operations and data manipulation tasks.

The Xeon Bronze responds with dominant wins in other PassMark tests. Extended instructions show the Xeon Bronze at 10387 against the Atom's 5509, a 47% lead. Find prime numbers is even more lopsided: the Xeon Bronze scores 119 versus the Atom's 29, a 75.6% advantage. Floating point math favors the Xeon Bronze by 38.7%, with scores of 29142 and 17856. Physics tests show a 38.4% gap, 1114 to 686. PassMark multi-thread performance goes to the Xeon Bronze at 9969 versus 9409, a 5.6% edge, while single-thread scores show the Xeon Bronze ahead by 3.6% at 1516 to 1462.

The pattern is consistent: the Xeon Bronze wins most tests, but the Atom wins the ones where it wins by large margins. The Atom's four victories come with an average delta of roughly 30%, while the Xeon Bronze's 13 wins include several very large margins in floating point and extended instruction workloads. This makes the choice between the two highly workload dependent, not a simple matter of overall speed.

FAQ

Q: Which processor has the higher average benchmark score?

A: The Intel Atom x7809C records an average benchmark score of 12607, while the Intel Xeon Bronze 3408U averages 12019. Both processors rank at the 67th percentile among all CPUs in the database.

Q: How much faster is the Xeon Bronze in Cinebench R23 multi-core?

A: The Xeon Bronze 3408U scores 8473 in Cinebench R23 multi-core, compared to the Atom x7809C's 7997. This represents a 5.6% advantage for the Xeon Bronze.

Q: What is the biggest single benchmark win for the Atom x7809C?

A: The largest Atom victory is in PassMark data encryption, where it scores 7832 against the Xeon Bronze's 5274, a 48.5% lead. The Atom also wins data compression by 16.5%, integer math by 26.9%, and random string sorting by 30.3%.

Q: What is the biggest single benchmark win for the Xeon Bronze 3408U?

A: The largest Xeon Bronze victory is in PassMark find prime numbers, where it scores 119 versus the Atom's 29, a 75.6% advantage. It also leads extended instructions by 47% and floating point math by 38.7%.

Q: Do both processors have the same number of cores and threads?

A: Yes, both the Intel Atom x7809C and the Intel Xeon Bronze 3408U have 8 cores and 8 threads. The differences lie in architecture, cache, memory support, and power envelope, not core count.

Q: Which processor supports ECC memory?

A: The Intel Xeon Bronze 3408U supports ECC memory. The Intel Atom x7809C does not support ECC memory, according to the recorded specifications.

Architecture Differences

The two processors come from entirely different Intel design families. The Atom x7809C uses the Amston Lake architecture with Gracemont cores, built on a 10 nm process. The Xeon Bronze 3408U uses Sapphire Rapids with Sapphire Rapids-SP cores, also on a 10 nm node. Both are manufactured by Intel, but the design philosophies diverge sharply.

Cache hierarchies reflect the architectural divide. The Atom x7809C has 96 KB of L1 cache per core, 2 MB of L2 cache per module, and 6 MB of shared L3 cache. The Xeon Bronze 3408U has 80 KB of L1 per core, 2 MB of L2 per core (not per module), and a much larger 22.5 MB of L3 cache. The Xeon's per-core L2 allocation and larger shared L3 explain part of its advantage in floating point and extended instruction tests.

Memory support differs fundamentally. The Atom supports both DDR4 and DDR5, but only via a single-channel memory bus, yielding 38.4 GB/s of bandwidth. The Xeon Bronze supports only DDR5, but through an eight-channel memory bus, delivering 256.0 GB/s of bandwidth. That is a massive difference in memory throughput, nearly seven times the Atom's bandwidth. The Xeon also supports ECC memory, while the Atom does not.

PCIe capabilities follow the same pattern. The Atom offers PCIe Gen 3 with 9 lanes (CPU only). The Xeon Bronze provides PCIe Gen 5 with 80 lanes (CPU only). The Xeon's PCIe Gen 5 support and lane count make it suited for high-bandwidth expansion, while the Atom's limited lanes fit its mobile and embedded positioning.

Socket and platform also separate the two. The Atom uses Intel BGA 1264, a soldered mobile socket. The Xeon Bronze uses Intel Socket 4677, a server platform socket. The Atom is classified as a mobile market segment part, while the Xeon Bronze targets server and workstation use. The Atom has no integrated graphics, and the Xeon Bronze also has no integrated graphics listed.

Power and thermal design are starkly different. The Atom x7809C has a TDP of 25 watts. The Xeon Bronze 3408U has a TDP of 125 watts, five times higher. This explains the Xeon's higher performance in many tests, but also frames the Atom as a low-power alternative with competitive results in specific workloads.

The Verdict

The data points to a clear verdict for general-purpose compute: the Intel Xeon Bronze 3408U is the faster processor. It wins 13 of 17 head-to-head benchmarks, including all Cinebench rendering tests, PassMark multi-thread, single-thread, physics, floating point math, extended instructions, and prime number finding. The margins in rendering are consistent at 5.6% to 5.8%, and the margins in specialized compute can be enormous, up to 75.6% in prime number finding.

However, the Intel Atom x7809C is not simply a weaker chip. It wins decisively in data compression, encryption, integer math, and random string sorting. These are real workloads, and the Atom's advantages range from 16.5% to 48.5%. For tasks that rely on integer throughput and data manipulation, the Atom is the better choice despite its lower power draw and simpler memory subsystem.

The choice depends on the workload profile. If the task involves rendering, floating point calculations, extended instruction sets, or physics simulations, the Xeon Bronze is the clear pick. If the task involves data compression, encryption, integer math, or string sorting, the Atom wins. For mixed workloads, the Xeon Bronze's broader win count and consistent rendering performance give it the overall edge.

The Atom's 25 watt TDP and mobile socket make it suitable for power-constrained embedded or mobile applications. The Xeon Bronze's 125 watt TDP, eight-channel memory, ECC support, and PCIe Gen 5 lanes make it a server-class part. Neither is a universal winner, but the Xeon Bronze is the safer general-purpose choice.

Specification Differences

The following fields differ between the Intel Atom x7809C and the Intel Xeon Bronze 3408U:

• Base clock: 2.00 GHz (Atom) versus 1800.00 MHz (Xeon Bronze)
• Boost clock: 3.60 GHz (Atom) versus 1900.00 MHz (Xeon Bronze)
• TDP: 25 watts (Atom) versus 125 watts (Xeon Bronze)
• Socket: Intel BGA 1264 (Atom) versus Intel Socket 4677 (Xeon Bronze)
• Architecture: Amston Lake (Atom) versus Sapphire Rapids (Xeon Bronze)
• Codename: Amston Lake (Atom) versus Sapphire Rapids (Xeon Bronze)
• Generation: Atom (Gracemont) (Atom) versus Xeon Bronze (Sapphire Rapids-SP) (Xeon Bronze)
• L1 cache: 96 KB per core (Atom) versus 80 KB per core (Xeon Bronze)
• L2 cache: 2 MB per module (Atom) versus 2 MB per core (Xeon Bronze)
• L3 cache: 6 MB shared (Atom) versus 22.5 MB (Xeon Bronze)
• Memory support: DDR4, DDR5 (Atom) versus DDR5 (Xeon Bronze)
• Memory bus: Single-channel (Atom) versus Eight-channel (Xeon Bronze)
• Memory bandwidth: 38.4 GB/s (Atom) versus 256.0 GB/s (Xeon Bronze)
• ECC memory: False (Atom) versus True (Xeon Bronze)
• PCIe: Gen 3, 9 lanes (Atom) versus Gen 5, 80 lanes (Xeon Bronze)
• Market segment: Mobile (Atom) versus Server/Workstation (Xeon Bronze)
• Release date: 2024-04-07 (Atom) versus 2023-01-09 (Xeon Bronze)
• Launch MSRP: $117 (Atom) versus $425 (Xeon Bronze)
• Part number: SRNEN (Atom) versus SRMGB (Xeon Bronze)

Identical fields include cores (8), threads (8), process node (10 nm), foundry (Intel), integrated graphics (N/A or null), multiplier unlock (false for both), and production status (Active for both).

Where Each One Wins

The Intel Atom x7809C wins in four benchmark categories. Data compression shows the Atom at 111525 versus 95714, a 16.5% margin. Data encryption is its strongest win at 48.5% ahead. Integer math gives the Atom a 26.9% edge, and random string sorting shows a 30.3% lead. These wins point to workloads involving compression algorithms, encryption/decryption, integer arithmetic, and sorting operations. The Atom's Gracemont architecture appears optimized for these scalar integer tasks.

The Intel Xeon Bronze 3408U wins in the remaining 13 categories. All six Cinebench tests (R15, R20, R23, both multi-core and single-core) go to the Xeon Bronze with margins around 5.6%. PassMark multi-thread and single-thread tests also favor the Xeon Bronze, with multi-thread at 5.6% and single-thread at 3.6%. Physics tests show a 38.4% advantage for the Xeon. Floating point math is 38.7% higher. Extended instructions are 47% higher. The largest win is in prime number finding, where the Xeon Bronze leads by 75.6%.

For rendering workloads, the Xeon Bronze is the pick. For floating point heavy computation, extended instruction sets, physics simulation, and prime number calculation, the Xeon Bronze dominates. For data compression, encryption, integer math, and string sorting, the Atom is the winner. The Xeon Bronze also holds the edge in memory bandwidth, PCIe connectivity, and ECC support, making it the more capable platform for server environments. The Atom's advantages are narrower but pronounced in its winning categories, suggesting specialized use cases where its efficiency and integer throughput matter most.