Intel Core i3-7100T vs Intel Xeon E3-1235L v5 Comparison

The Intel Core i3-7100T and Intel Xeon E3-1235L v5 are both 14 nm Intel processors on the Intel Socket 1151 platform, yet they serve very different purposes. The Core i3-7100T is a Kaby Lake desktop part with 2 cores and 4 threads, while the Xeon E3-1235L v5 is a Skylake-DT server/workstation chip with 4 cores and 4 threads. Benchmark data shows a decisive performance advantage for the Xeon in every shared test, with the Xeon leading by roughly 25% across all Cinebench workloads. However, the Core i3 counters with a higher base clock, newer architecture, and active production status, creating a nuanced comparison beyond raw benchmark scores.

FAQ

Q: Which processor has more physical cores?

A: The Intel Xeon E3-1235L v5 has 4 cores, while the Intel Core i3-7100T has only 2 cores. Both processors support 4 threads total, meaning the Core i3 relies on Hyper-Threading to match the Xeon’s thread count.

Q: How much larger is the L3 cache on the Xeon?

A: The Xeon E3-1235L v5 features 8 MB of shared L3 cache, compared to 3 MB on the Core i3-7100T. This represents a 5 MB difference, which is a significant factor in the Xeon’s multi-threaded performance.

Q: What is the single-core performance gap in Cinebench R23?

A: In Cinebench R23 single-core, the Xeon E3-1235L v5 scores 601, while the Core i3-7100T scores 448. The Xeon leads by 25.5%, as indicated by the deltaPct of -25.5% from the Core i3’s perspective.

Q: Does the Xeon support ECC memory?

A: Yes, the Intel Xeon E3-1235L v5 supports ECC memory, while the Intel Core i3-7100T does not. This makes the Xeon suitable for error-correcting workloads in server environments.

Q: Which processor has a higher TDP?

A: The Core i3-7100T has a TDP of 35 watts, which is 10 watts higher than the Xeon E3-1235L v5’s 25 watts. Despite having fewer cores, the Core i3 draws more power under load.

Q: What is the production status of each chip?

A: The Intel Core i3-7100T is listed as "Active" in production, while the Intel Xeon E3-1235L v5 is marked as "End-of-life." This means the Core i3 is still available for new systems, whereas the Xeon is being phased out.

Architecture Differences

The architectural divide between these two processors starts with their underlying designs. The Core i3-7100T is built on the Kaby Lake architecture, which is a refinement of the Skylake microarchitecture. In contrast, the Xeon E3-1235L v5 uses the original Skylake-DT design. Both are fabricated on Intel’s 14 nm process node, but the Kaby Lake part benefits from a newer generation, as indicated by its "Core i3 (Kaby Lake)" generation label versus the Xeon’s "Xeon E3 (Skylake-DT)" label.

The core and thread configurations differ markedly. The Core i3-7100T has 2 physical cores and 4 threads, relying on Hyper-Threading technology to process four simultaneous threads. The Xeon E3-1235L v5 has 4 physical cores but only 4 threads, meaning it does not use Hyper-Threading. This gives the Xeon a raw core-count advantage, while the Core i3 matches thread count through its multi-threading capability.

Cache hierarchy shows a major divergence. Both chips have identical L1 and L2 caches at 64 KB per core and 256 KB per core, respectively. However, the L3 cache is where the Xeon pulls ahead significantly: 8 MB shared versus 3 MB shared on the Core i3. This larger cache allows the Xeon to store more frequently accessed data, reducing memory latency in multi-threaded workloads.

Memory support also differs. The Core i3-7100T supports only DDR4 memory with a bandwidth of 38.4 GB/s, while the Xeon E3-1235L v5 supports both DDR3 and DDR4, but with a lower bandwidth of 34.1 GB/s. The Xeon also includes ECC memory support, a feature absent on the Core i3, which is critical for data integrity in server applications. Both processors use dual-channel memory buses and PCIe Gen 3 with 16 lanes from the CPU.

Integrated graphics differentiate the two as well. The Core i3-7100T includes Intel HD 630, while the Xeon E3-1235L v5 is equipped with HD Graphics P530. The Xeon’s graphics are designed for workstation stability rather than consumer performance, and its server market segment reflects that focus.

Head-to-Head Benchmarks

The benchmark results are unambiguous: the Xeon E3-1235L v5 wins every single shared test, taking all 5 head-to-head comparisons. The largest margin appears in Cinebench R15 multi-core, where the Xeon scores 429 against the Core i3-7100T’s 319, a delta of -25.6% from the Core i3’s perspective. This pattern holds consistently across all workloads, with the Xeon maintaining a lead of approximately 25.4% to 25.6% in every test.

In Cinebench R20 multi-core, the Xeon scores 1789 versus the Core i3’s 1333, a 25.5% advantage. The single-core R20 test shows the Xeon at 252 against the Core i3’s 188, also a 25.4% gap. This near-uniform delta across both single and multi-core tests suggests the Xeon’s advantage is not just about core count, but also about per-core efficiency at the tested clock speeds.

The Cinebench R23 results mirror the earlier tests. In multi-core, the Xeon scores 4261 compared to the Core i3’s 3175, a 25.5% lead. In single-core, the Xeon scores 601 versus 448, again a 25.5% advantage. The consistency of these deltas indicates that the Xeon’s higher boost clock of 3.00 GHz, despite a lower base clock of 2000 MHz, allows it to outperform the Core i3’s fixed 3.40 GHz clock in sustained workloads.

The Core i3-7100T has no benchmark wins in the head-to-head data. Its average benchmark score is 1258, placing it in the 34th percentile of all CPUs. The Xeon E3-1235L v5 has a slightly lower average score of 1232, but it also sits in the 34th percentile. This near-identical percentile ranking, despite the Xeon’s head-to-head dominance, highlights that the Core i3 compensates with strong performance in other benchmark suites not shared in this comparison.

Specification Differences

The two processors diverge on several key specifications. The most obvious difference is core count: 2 cores on the Core i3-7100T versus 4 cores on the Xeon E3-1235L v5. Thread counts are identical at 4, but the Core i3 achieves this via Hyper-Threading, while the Xeon uses physical cores only.

Base clock speeds differ significantly. The Core i3-7100T runs at 3.40 GHz, while the Xeon E3-1235L v5 has a base clock of 2000 MHz. However, the Xeon has a boost clock of 3.00 GHz, which the Core i3 lacks entirely, as indicated by a null boost clock value. This means the Core i3 operates at a fixed frequency, while the Xeon can dynamically increase its speed under load.

TDP is another differentiator. The Core i3-7100T draws 35 watts, while the Xeon E3-1235L v5 is more power-efficient at 25 watts. The Xeon also has a larger die size at 122 mm² and 1,750 million transistors, whereas the Core i3 does not list these specifications in the data.

Cache sizes differ in L3 only, with the Xeon’s 8 MB shared cache dwarfing the Core i3’s 3 MB. Memory support shows the Core i3 limited to DDR4, while the Xeon supports both DDR3 and DDR4. Memory bandwidth favors the Core i3 at 38.4 GB/s versus the Xeon’s 34.1 GB/s. ECC memory is supported only on the Xeon.

Other differences include integrated graphics (HD 630 on the Core i3, HD Graphics P530 on the Xeon), market segment (Desktop versus Server/Workstation), and production status (Active versus End-of-life). The Xeon has a launch MSRP of $250, while the Core i3 has no listed launch MSRP. Release dates also differ, with the Core i3 launching on 2017-01-02 and the Xeon on 2015-10-18.

Where Each One Wins

The Xeon E3-1235L v5 wins in every benchmark category where both processors are tested. This includes all Cinebench R15, R20, and R23 multi-core and single-core tests. The Xeon’s 4 physical cores and larger 8 MB L3 cache provide a clear advantage in both multi-threaded rendering and single-threaded tasks, as evidenced by the consistent 25% lead. Its lower TDP of 25 watts also makes it more energy-efficient for sustained server workloads, and ECC memory support ensures data integrity in critical applications.

The Core i3-7100T, despite losing all head-to-head tests, has its own strengths. It offers a higher base clock of 3.40 GHz, which is beneficial for lightly threaded tasks that do not utilize boost clocks. Its support for DDR4 memory with higher bandwidth (38.4 GB/s) may provide better memory throughput in compatible systems. The Core i3 is also an active production part, meaning it is currently available for new builds, while the Xeon is end-of-life. For desktop users who prioritize a modern, actively supported processor with a newer Kaby Lake architecture, the Core i3 is the more sensible choice.

The Core i3’s average benchmark score of 1258 is actually slightly higher than the Xeon’s 1232, suggesting that in benchmarks outside the shared Cinebench suite, the Core i3 may perform comparably or better. Its nearest rivals include the Intel Core i7-3615QM (deltaPct -0.2%) and AMD Athlon 200GE (deltaPct -0.2%), while the Xeon’s nearest rivals include the Intel Core i3-8109U (deltaPct -0.2%) and Intel Core i5-2500 (deltaPct 1%). These rival comparisons show both chips are competitive within their respective performance tiers.

The Verdict

The data points to a clear performance winner: the Intel Xeon E3-1235L v5 dominates the Intel Core i3-7100T in every shared benchmark, with a consistent 25% advantage across single and multi-core Cinebench tests. Users who need maximum CPU throughput for rendering, compilation, or server workloads should choose the Xeon, provided they can source an end-of-life part. Its 4 physical cores, 8 MB L3 cache, and ECC memory support make it the superior compute engine.

However, the Core i3-7100T is not without merit. Its active production status, higher base clock, and newer Kaby Lake architecture make it a viable choice for desktop users who value a current, supported platform. The Core i3’s higher memory bandwidth and slightly better average benchmark score suggest it may excel in memory-sensitive or single-threaded applications that do not rely on the Cinebench workloads tested here. For a general-purpose desktop build where the Xeon’s server-oriented features are unnecessary, the Core i3-7100T is the more practical option, despite losing the benchmark comparison.