Intel Core i3-1215U vs Intel Xeon Bronze 3408U Comparison

Head-to-Head Benchmarks

The benchmark data reveals a sharply split performance profile between these two Intel parts. The Intel Xeon Bronze 3408U dominates the Cinebench suite, while the Intel Core i3-1215U fights back hard in several Passmark workloads. The overall win count stands at 10 for the Xeon Bronze 3408U and 7 for the Core i3-1215U, but the margin of victory tells a more complex story.

In Cinebench, the Xeon Bronze 3408U is consistently ahead by roughly 21.6% to 21.7% across every iteration. The Cinebench R23 multicore score shows 8473 for the Xeon against 6644 for the Core i3, a 21.6% gap. Single-core results follow the same pattern: Cinebench R23 single-core scores 1196 versus 938, again a 21.6% deficit for the i3-1215U. The Cinebench R15 and R20 runs mirror this exactly, with deltas of 21.6% in multicore and 21.7% in single-core. The Xeon Bronze 3408U posts 853 in Cinebench R15 multicore against 669 for the i3, and 120 versus 94 in single-core.

The Passmark suite, however, is where the Core i3-1215U demonstrates its strengths. The largest single victory for the i3 comes in Passmark single-thread, where it scores 3218 against 1516 for the Xeon, a massive 112.3% advantage. That same 3218 score appears in both passmark_single_thread and passmark_singlethread entries, confirming the result. Integer math also heavily favors the mobile chip: 35534 versus 22803, a 55.8% lead. Data compression goes to the i3 at 116705 against 95714, a 21.9% edge. Data encryption shows a 33.5% advantage for the i3 at 7041 versus 5274. The multithread Passmark test narrowly favors the i3 at 10472 versus 9969, a 5% margin, and random string sorting goes to the i3 at 13046 versus 12073, an 8.1% difference.

The Xeon Bronze 3408U counters with strong showings in other Passmark workloads. Extended instructions favor the Xeon by 33.9%, with scores of 10387 versus 6868. Prime number finding is a decisive 73.1% win for the Xeon at 119 versus 32. Physics scores show the Xeon at 1114 against 583 for the i3, a 47.7% lead. Floating point math also goes to the Xeon at 29142 versus 25379, a 12.9% margin.

The overall average benchmark scores place both processors in the 67th percentile among all CPUs in the database. The Core i3-1215U has an average benchmark score of 12604, while the Xeon Bronze 3408U sits at 12019. The nearest rivals for the i3 include the Intel Atom x7809C at 12607, the Intel Core i3-10105F at 12644, the Intel Core i5-1230U at 12559, and the AMD EPYC 9174F at 12536. The Xeon's nearest rivals are the Intel Xeon Gold 6314U at 12026, AMD Ryzen 5 3500X at 12000, Intel Core i3-12100 at 12054, and Intel Core i7-7700 at 11914. Both chips sit in remarkably similar company despite their architectural differences.

Architecture Differences

The two processors come from different Intel families entirely. The Core i3-1215U is built on Alder Lake architecture, specifically the Alder Lake-U codename, and belongs to the Core i3 generation. It uses a 10 nm process node from Intel. The Xeon Bronze 3408U is a Sapphire Rapids design, part of the Sapphire Rapids-SP generation, also fabricated on a 10 nm node. Both share the same process technology, but the design goals diverge sharply.

Core counts differ: the i3-1215U packs 6 cores and 8 threads, while the Xeon Bronze 3408U offers 8 cores and 8 threads. The Xeon has more physical cores but no additional threading, meaning it uses one thread per core. The i3 relies on hyper-threading to reach 8 threads from 6 cores. Clock speeds tell part of the story. The i3 has a base clock of 1200 MHz and a boost clock of 4400 MHz, a wide range for burst workloads. The Xeon runs at 1800 MHz base and only 1900 MHz boost, a narrow band typical of server parts designed for sustained operation.

Cache hierarchies differ substantially. Both have 80 KB of L1 cache per core. The L2 cache is 1.25 MB per core on the i3 versus 2 MB per core on the Xeon. Shared L3 cache shows the biggest gap: 10 MB on the i3 versus 22.5 MB on the Xeon. The larger L3 cache on the Xeon helps explain its strong Cinebench and physics performance.

Memory support is a major dividing line. The i3-1215U supports DDR4 and DDR5 in a dual-channel configuration, with no ECC memory support. The Xeon Bronze 3408U supports DDR5 only, in an eight-channel configuration, with a memory bandwidth of 256.0 GB/s and full ECC support. That eight-channel setup is a server-class feature that the mobile chip cannot match. PCIe connectivity also separates them: the i3 offers Gen 4 with 20 lanes, while the Xeon provides Gen 5 with 80 lanes.

Integrated graphics appear only on the i3-1215U, which includes UHD Graphics 64EU. The Xeon has no integrated graphics at all, requiring a discrete GPU for display output. The i3 targets the mobile segment with a 15 W TDP, while the Xeon is a server and workstation part rated at 125 W. Sockets reflect their different worlds: the i3 uses Intel BGA 1744, a soldered mobile socket, while the Xeon uses Intel Socket 4677, a server platform. Release dates differ by roughly 11 months, with the i3 launching in 2022-02-22 and the Xeon in 2023-01-09. The Xeon carries a launch MSRP of $425.

The Verdict

The data points to two different buyers. The Intel Xeon Bronze 3408U is the clear choice for sustained multi-core rendering and compute workloads. Its Cinebench sweep across R15, R20, and R23, with consistent 21.6% to 21.7% leads, makes it the stronger part for content creation tasks that rely on those engines. The Xeon also wins physics by 47.7%, prime number finding by 73.1%, floating point math by 12.9%, and extended instructions by 33.9%. Add ECC memory support, eight-channel DDR5, and Gen 5 PCIe with 80 lanes, and this is a processor built for reliability and throughput in server environments.

The Intel Core i3-1215U is the better choice for single-thread responsiveness and certain data workloads. Its 112.3% lead in Passmark single-thread performance is extraordinary, and it also wins integer math by 55.8%, data compression by 21.9%, and data encryption by 33.5%. The i3 achieves a higher average benchmark score of 12604 against 12019 for the Xeon, despite losing the majority of head-to-head tests. That higher average reflects the weight of its massive single-thread and integer wins. The i3 also includes integrated graphics, a mobile form factor, and a 15 W TDP, making it suitable for laptops and compact systems.

The Xeon Bronze 3408U is the pick for server racks, workstations, and workloads that need ECC, high memory bandwidth, and sustained multi-core output. The Core i3-1215U is the pick for everyday computing, single-threaded applications, and tasks involving compression, encryption, or integer math. Neither chip is a universal winner, but each excels in its intended domain.

FAQ

Q: Which processor has the higher single-core performance?

A: The Intel Core i3-1215U wins Passmark single-thread by 112.3%, scoring 3218 against 1516 for the Xeon Bronze 3408U. However, in Cinebench R23 single-core, the Xeon wins at 1196 versus 938, a 21.6% lead.

Q: Does the Xeon Bronze 3408U support ECC memory?

A: Yes, the Xeon Bronze 3408U supports ECC memory and uses DDR5 in an eight-channel configuration with 256.0 GB/s bandwidth. The Core i3-1215U does not support ECC and uses dual-channel DDR4 or DDR5.

Q: Which processor has more cores?

A: The Xeon Bronze 3408U has 8 cores and 8 threads. The Core i3-1215U has 6 cores and 8 threads. The Xeon has more physical cores but no hyper-threading, while the i3 reaches 8 threads from 6 cores.

Q: What is the average benchmark score for each processor?

A: The Core i3-1215U has an average benchmark score of 12604, and the Xeon Bronze 3408U has an average benchmark score of 12019. Both sit in the 67th percentile among all CPUs in the database.

Q: Which processor includes integrated graphics?

A: Only the Intel Core i3-1215U includes integrated graphics, specifically UHD Graphics 64EU. The Xeon Bronze 3408U has no integrated graphics and requires a discrete GPU.

Q: How do the processors compare in memory bandwidth?

A: The Xeon Bronze 3408U supports eight-channel DDR5 with 256.0 GB/s bandwidth. The Core i3-1215U supports dual-channel DDR4 or DDR5, and the database does not list a bandwidth figure for it.

Where Each One Wins

The Xeon Bronze 3408U wins in every Cinebench test, covering R15, R20, and R23 in both multicore and single-core. Its leads range from 21.6% to 21.7% across all six tests. It also wins Passmark physics by 47.7%, prime number finding by 73.1%, floating point math by 12.9%, and extended instructions by 33.9%. These wins point to workloads involving rendering, physics simulation, scientific computing, and instruction-heavy processing. Server administrators and workstation users running sustained compute tasks will find the Xeon more capable.

The Core i3-1215U wins Passmark single-thread by 112.3%, integer math by 55.8%, data encryption by 33.5%, data compression by 21.9%, multithread by 5%, and random string sorting by 8.1%. These wins indicate strengths in everyday responsiveness, file compression, encryption tasks, and integer-heavy operations. The multithread win at 10472 versus 9969 is notable because the Xeon has more physical cores, yet the i3 still edges ahead in that aggregate Passmark score.

The use-case split is clear. The Xeon Bronze 3408U suits server and workstation deployments where ECC memory, eight-channel DDR5, 80 PCIe Gen 5 lanes, and sustained multi-core throughput matter. The Core i3-1215U suits mobile systems and general-purpose computing where single-thread speed, integrated graphics, and lower power consumption at 15 W take priority. The Xeon's 125 W TDP and server socket place it firmly in data center territory, while the i3's BGA 1744 socket and mobile segment designation target laptops and compact devices. Buyers should choose based on workload type, not raw core counts, because the benchmark data shows that each processor wins where its architecture is designed to excel.