Intel Xeon Bronze 3408U

The Intel Xeon Bronze 3408U is an 8-core, 8-thread Sapphire Rapids-SP processor built on Intel’s 10 nm process for the Server/Workstation segment. With a base clock of 1800 MHz and a boost clock of 1900 MHz, it targets entry-level dual-socket platforms where predictability and platform features matter more than raw frequency. Benchmark data places its average score at 12019, which lands it in the 71st percentile of all CPUs tracked. Its launch MSRP is $425.

How It Compares

Against the Intel Xeon Gold 6314U, the Bronze 3408U trails by a negligible 0.1% in average benchmark score (12019 vs. 12026). This near-identical performance is notable because the Gold 6314U is a higher-tier part; the data suggests that for mixed workloads, the Bronze’s lower clock speeds are largely offset by architectural efficiency. In practical terms, a system built around either chip would deliver virtually indistinguishable multi-threaded throughput in the benchmarks measured.

The AMD Ryzen 5 3500X sits marginally ahead at 11985 average score, giving the Bronze a 0.3% advantage. This is a desktop-oriented rival, and the comparison highlights that the Xeon’s server-focused feature set does not sacrifice raw compute relative to a mainstream consumer chip. The 3408U’s advantage is slim but consistent, meaning it can handle similar thread-limited tasks without being a bottleneck in entry servers.

Versus the Intel Core i7-6700, the Bronze 3408U is 0.3% behind (12057 vs. 12019). This older desktop processor has higher clock speeds, but the Xeon compensates with a newer architecture and more cache. The delta is within noise, so the data indicates that generation-over-generation improvements in the Xeon line have effectively closed the gap with legacy high-end desktop parts in average workloads.

The AMD EPYC 7453 shows a 0.9% advantage over the Bronze (11912 vs. 12019). This is the largest gap among the nearest rivals, yet still under one percent. Given that the EPYC 7453 is a 32-core part, the fact that an 8-core Xeon nearly matches its average score suggests the benchmark suite weights single-thread and lightly-threaded tasks heavily, where the Bronze’s per-core efficiency shines. For multi-core-heavy deployments, the EPYC would pull ahead, but the data does not reflect that here.

Power and Thermals

The 3408U carries a TDP of 125 watts, placing it in a moderate power class for server processors. This TDP level implies that a capable air cooler or a low-profile passive heatsink with adequate chassis airflow is sufficient for most rack environments. No liquid cooling or exotic thermal solutions are required based on the thermal design power alone.

Given the modest 1800 MHz base and 1900 MHz boost clocks, the 125 W TDP suggests headroom for sustained operation under full load without thermal throttling in standard server chassis. The eight-core design keeps power density manageable, and the data does not indicate any extreme thermal events. For workstation builds, a tower cooler with a 120mm fan would be more than adequate, while 1U servers can rely on ducted airflow designs.

Who Should Consider It

For single-threaded workloads, benchmark results show a Cinebench R23 single-core score of 1196, which is modest by modern standards. This makes the 3408U a poor fit for tasks dominated by per-core performance, such as lightweight interactive desktop use or low-latency trading applications. The PassMark single-thread score of 1516 reinforces that this chip is not optimized for high-frequency responsiveness.

Multi-threaded server tasks are a better match. The Cinebench R23 multi-core score of 8473 and PassMark multithread score of 9969 indicate solid throughput for an 8-thread part. Data compression (PassMark score 95714) and floating-point math (29142) are relative strengths, suggesting the chip handles database compression, scientific calculations, and financial modeling reasonably well. Integer math (22803) and extended instructions (10387) are also competent.

For office and general IT workloads, the 3408U is overqualified but not wasteful. The PassMark physics score of 1114 and random string sorting score of 12073 show it can handle typical enterprise applications, virtualization hosts, and file servers without strain. However, the low single-thread performance means interactive remote desktop sessions or compile-heavy development work will feel sluggish. It is best suited for background processing, batch jobs, and always-on services rather than user-facing compute.

Encryption and security workloads are a notable weakness. The PassMark data encryption score of 5274 is low, indicating that the chip lacks dedicated cryptographic acceleration that would make it competitive for VPN gateways or secure communication servers. If encryption throughput is a priority, other parts in the Xeon lineup would be more appropriate.

FAQ

Q: How does the Intel Xeon Bronze 3408U compare to the AMD EPYC 7453 in average benchmarks?

A: The Bronze 3408U scores 12019 on average, while the EPYC 7453 scores 11912, giving the Intel part a 0.9% advantage in the measured suite.

Q: What is the memory configuration for this processor?

A: It supports DDR5 memory with an eight-channel memory bus, providing a theoretical memory bandwidth of 256.0 GB/s. ECC memory is supported.

Q: Does the 3408U support PCIe Gen 5?

A: Yes, the CPU provides 80 PCIe Gen 5 lanes, which is a substantial amount for storage and networking expansion.

Q: What is the socket and architecture?

A: It uses Intel Socket 4677 and is based on the Sapphire Rapids architecture, specifically the Sapphire Rapids-SP generation.

Q: What is the L3 cache size?

A: The total L3 cache is 22.5 MB, with L1 cache at 80 KB per core and L2 cache at 2 MB per core.

Q: Is the 3408U a good choice for gaming?

A: No. Its Cinebench R23 single-core score of 1196 and PassMark single-thread score of 1516 are too low for modern gaming, which relies heavily on high single-thread performance.

Platform and Compatibility

The Intel Xeon Bronze 3408U fits into Intel Socket 4677 platforms, which are designed for dual-socket servers and workstations. The Sapphire Rapids architecture brings a 10 nm process node from Intel’s foundry. Memory support includes DDR5 across an eight-channel bus, delivering a theoretical bandwidth of 256.0 GB/s, with ECC enabled for data integrity in mission-critical environments.

PCIe connectivity is generous: 80 Gen 5 lanes from the CPU alone, which allows for multiple high-speed NVMe drives, GPUs, or network interface cards without relying on a separate chipset for expansion. This makes the 3408U a viable entry point into a platform that can scale with I/O-heavy workloads. The processor is not multiplier-unlocked, so overclocking is not an option; clock speeds are fixed at 1800 MHz base and 1900 MHz boost.

For upgrade paths, the Socket 4677 platform supports other Xeon parts in the same generation, but the data does not specify which specific models are compatible. The production status is active, and the release date is January 9, 2023. The part number is SRMGB. The eight-channel memory controller and 80 PCIe lanes indicate that the platform is built for density and bandwidth rather than cost optimization. Users looking to start with a low-core-count processor can later move to higher-core Xeon parts without changing the motherboard, provided the BIOS and power delivery support it. The 125 W TDP also leaves ample thermal headroom in most chassis designs, simplifying cooling for future upgrades.