Intel Core i3-10305T vs Intel Xeon E3-1558L v5 Comparison

Head-to-Head Benchmarks

The benchmark data is unambiguous: the Intel Core i3-10305T wins every single head-to-head comparison in the Cinebench suite, taking all 6 recorded matches. The Xeon E3-1558L v5 does not win a single test. The margins are consistent across both single-core and multi-core workloads, with the i3-10305T holding a narrow but uniform advantage.

In Cinebench R15, the i3-10305T scores 669 points in multi-core against the Xeon's 655, a delta of 2.1%. The single-core test shows the same 2.1% gap, with scores of 94 versus 92. Moving to Cinebench R20, the i3-10305T posts 2791 in multi-core and 393 in single-core, while the Xeon manages 2733 and 385 respectively, again a 2.1% and 2.0% difference. Cinebench R23 follows the same pattern: the i3-10305T scores 6647 multi-core and 938 single-core, while the Xeon records 6508 and 918, with the same 2.1% delta.

The consistency of the delta across all six tests is notable. This is not a case of one chip winning on bandwidth-heavy workloads and losing on latency-sensitive ones. The i3-10305T is uniformly ahead, even if the margin is modest. The average benchmark score in the database confirms this: the i3-10305T sits at 1922, which is 40 points higher than the Xeon's 1882. That is a 2.1% overall lead, mirroring the head-to-head results.

When placed in the broader database context, the Xeon E3-1558L v5 sits at the 43rd percentile among all CPUs, with nearest rivals including the Intel Processor U300 (average score 1881, 0.1% behind) and the Intel Xeon E3-1270L v4 (1883, 0.1% ahead). The i3-10305T also sits at the 43rd percentile, but its nearest rivals are different: the Intel Core i7-6700T (1918, 0.2% behind) and the AMD Ryzen 3 7320U (1916, 0.3% behind). The i3-10305T is essentially tied with the Xeon E3-1231 v3 (1925, 0.2% ahead) and the Core i7-1180G7 (1930, 0.4% ahead). These rival comparisons show that both chips occupy the same performance tier, with the i3-10305T holding a slight edge.

There is no scenario in the recorded data where the Xeon E3-1558L v5 pulls ahead. Even in the multi-core tests, where the Xeon's server heritage might suggest an advantage, the i3-10305T remains ahead by the same 2.1% margin. This consistency is the key finding: the two processors are extremely close, but the i3-10305T is the better performer in every measurable metric.

Architecture Differences

Both processors share the same fundamental building blocks: 4 cores and 8 threads, a 14 nm process node from Intel, 8 MB of shared L3 cache, and 64 KB of L1 and 256 KB of L2 cache per core. The similarities end there in several key areas.

The Xeon E3-1558L v5 is built on the Skylake architecture (codename Skylake-H) and belongs to the Xeon E3 generation. Its base clock is 1900 MHz and boost clock is 3.30 GHz, with a TDP of 45 watts. The i3-10305T uses the Comet Lake architecture (codename Comet Lake-R) within the Core 10th Gen series. It runs at a base clock of 3.00 GHz and boosts to 4.00 GHz, with a lower TDP of just 35 watts. The higher clock speeds of the i3-10305T explain its consistent benchmark edge, particularly in single-threaded tests.

Memory support is another divergence. The Xeon accepts both DDR3 and DDR4 memory through a dual-channel bus, with a recorded memory bandwidth of 34.1 GB/s. The i3-10305T supports only DDR4, also dual-channel, but with a higher bandwidth rating of 42.7 GB/s. The ECC memory support also differs: the Xeon supports ECC, the i3 does not. The Xeon's broader memory compatibility and ECC support target server workloads, while the i3's higher bandwidth and tighter memory requirements suit a desktop environment.

Integrated graphics separate the two as well. The Xeon ships with Iris Pro Graphics P555, while the i3 uses UHD Graphics 630. The PCIe configuration is identical: Gen 3 with 16 lanes from the CPU. Neither has an unlocked multiplier.

The market segments are distinct. The Xeon is positioned for Server/Workstation deployments and is marked end-of-life. The i3 is a Desktop part and remains active. The release dates reflect this: the Xeon launched on May 30, 2016, while the i3 arrived on March 15, 2021. The process node is the same 14nm, but the architectures are generations apart.

The Verdict

The data directs a clear conclusion: the Intel Core i3-10305T is the better processor in every benchmark recorded. It wins all six Cinebench tests, posts a higher average benchmark score (1922 vs 1882), and does so with a lower TDP of 35 watts versus 45 watts. For pure performance per the recorded data, the i3-10305T is ahead.

However, the Xeon E3-1558L v5 has its own reasons to exist. The database shows it supports ECC memory, which the i3 does not. It also supports both DDR3 and DDR4, whereas the i3 only supports DDR4. This makes the Xeon the only choice for systems that require ECC, a feature the i3 lacks entirely. The Xeon also uses the Intel BGA 1440 socket, while the i3 uses the Intel Socket 1200, so the motherboard must match the chip.

The i3-10305T is the choice for desktop users who want the higher performance, lower power draw, and newer platform. The Xeon is the choice for server or workstation builds that need ECC memory support and broader memory compatibility, accepting a small performance deficit. The data shows a 2.1% performance gap across the board, which is real but modest. For an ECC-required system, the Xeon is the only option here. For everything else, the i3-10305T is the stronger pick.

Specification Differences

| Specification | Intel Xeon E3-1558L v5 | Intel Core i3-10305T |

|----------------|------------------------|----------------------|

| Architecture | Skylake | Comet Lake |

| Codename | Skylake-H | Comet Lake-R |

| Generation | Xeon E3 (Skylake-H) | Core i3 (Comet Lake) |

| Base Clock | 1900 MHz | 3000 MHz |

| Boost Clock | 3300 MHz | 4000 MHz |

| TDP | 45 W | 35 W |

| Socket | Intel BGA 1440 | Intel Socket 1200 |

| Memory Support | DDR3, DDR4 | DDR4 |

| Memory Bandwidth | 34.1 GB/s | 42.7 GB/s |

| ECC Memory | Yes | No |

| Integrated Graphics | Iris Pro Graphics P555 | UHD Graphics 630 |

| Market Segment | Server/Workstation | Desktop |

| Production Status | End-of-life | Active |

| Release Date | May 30, 2016 | March 15, 2021 |

| Launch MSRP | $396 | $143 |

| Part Number | SR2TU | SRH3M |

Both chips have 4 cores, 8 threads, 8 MB shared L3 cache, 64 KB L1 and 256 KB L2 per core, dual-channel memory bus, Gen 3 PCIe with 16 lanes, and locked multipliers.

FAQ

Q: Which processor has a higher boost clock?

A: The Intel Core i3-10305T has a boost clock of 4.00 GHz, while the Xeon E3-1558L v5 boosts to 3.30 GHz.

Q: Do both processors support ECC memory?

A: No. The Xeon E3-1558L v5 supports ECC memory; the Core i3-10305T does not.

Q: What is the average benchmark score difference between the two?

A: The Core i3-10305T has an average benchmark score of 1922, while the Xeon E3-1558L v5 scores 1882, a 2.1% difference.

Q: Which processor has a lower TDP?

A: The Core i3-10305T has a TDP of 35 watts, while the Xeon E3-1558L v5 has a TDP of 45 watts.

Q: Are the memory bandwidth ratings different?

A: Yes. The Xeon E3-1558L v5 has a memory bandwidth of 34.1 GB/s, while the Core i3-10305T has a higher rating of 42.7 GB/s.

Q: Do both processors use the same socket?

A: No. The Xeon E3-1558L v5 uses Intel BGA 1440, while the Core i3-10305T uses the Intel Socket 1200.

Where Each One Wins

The Intel Core i3-10305T wins on raw performance. In all six Cinebench tests, it holds a 2.1% lead over the Xeon. The advantage is consistent across both single-core and multi-core workloads. The i3-10305T also wins on efficiency, with a 35 watt TDP versus the Xeon's 45 watts, delivering a higher average benchmark score per watt. The i3 also has the higher memory bandwidth at 42.7 GB/s, a notable advantage for memory-intensive desktop applications. Its newer release date (March 15, 2021) and active production status make it the more accessible choice for new builds.

The Xeon E3-1558L v5 wins where its server-oriented features matter. The ECC memory support is its strongest advantage, as the i3-10305T cannot run ECC at all. The Xeon also supports DDR3 in addition to DDR4, a compatibility option for older industrial or embedded systems. Its 45 watt TDP is higher, but the BGA 1440 socket fits mobile and embedded server designs. The Xeon's market segment is Server/Workstation, meaning it is built for always-on deployment, although its end-of-life status limits its appeal.

The decision is straightforward: the i3-10305T is the faster chip, the lower power draw, and the newer product. The Xeon is the only one of the two that supports ECC memory and DDR3. If the workload requires ECC, the Xeon is the only option. If not, the Core i3-10305T is the better choice in every benchmark and efficiency category.