Intel Core i3-10305 vs Intel Xeon E3-1285 v6 Comparison

Where Each One Wins

The benchmark data presents an unusually one-sided picture: the Intel Xeon E3-1285 v6 wins all six recorded Cinebench tests against the Intel Core i3-10305. The Xeon’s victories are consistent, with deltas ranging from 3.6% to 3.8% across both single-core and multi-core workloads. In multi-core tests, the Xeon posts 818 versus 788 in Cinebench R15, 3409 versus 3287 in R20, and 8119 versus 7828 in R23. These are modest but uniform margins, suggesting the Xeon holds a small but reliable advantage in every measured scenario.

For single-core performance, the pattern repeats. The Xeon scores 115 versus 111 in R15 single-core, 481 versus 464 in R20, and 1146 versus 1105 in R23. The deltas here are 3.6% and 3.7%, nearly identical to the multi-core margins. This means the Xeon’s advantage is not workload-specific; it wins equally in lightly threaded and fully threaded applications. The Core i3-10305 never closes the gap in any recorded test, so users seeking maximum Cinebench throughput should favor the Xeon.

However, the broader database context adds nuance. The Xeon E3-1285 v6 sits at the 48th percentile among all CPUs, with an average benchmark score of 2348. Its nearest rivals include the Intel Core i5-9600 (2354, delta -0.3%) and AMD Ryzen 5 2500X (2361, delta -0.5%), meaning the Xeon is essentially tied with those parts. The Core i3-10305, at the 47th percentile with an average score of 2264, trails slightly but is also close to its own rivals, such as the Intel Core i7-1068NG7 (2259, delta 0.2%) and Intel Core i5-9400 (2254, delta 0.4%). So while the Xeon wins every head-to-head test, both chips occupy a similar performance tier relative to their respective competitor sets.

Architecture Differences

Both processors are built on Intel’s 14 nm process node and share the same foundry, Intel. They also have identical core and thread counts: 4 cores and 8 threads each. Cache layouts match as well, with 64 KB L1 per core, 256 KB L2 per core, and 8 MB shared L3. The PCIe configuration is the same: Gen 3 with 16 lanes from the CPU only. Neither chip has an unlocked multiplier, so overclocking is not supported on either part.

The key architectural split is the underlying design generation. The Xeon E3-1285 v6 uses Kaby Lake-DT architecture, part of the Xeon E3 (Kaby Lake-DT) generation, and was released on 2017-07-31. The Core i3-10305 uses Comet Lake-R architecture, part of the Core 10th Gen series, and was released on 2021-03-15. Despite the later release date, the Core i3 runs at a lower base clock: 3.80 GHz versus 4.10 GHz for the Xeon. Both chips boost to the same 4.50 GHz maximum, which explains why single-core scores are so close.

Memory support also differs. The Xeon supports ECC memory, a feature absent on the Core i3. The Core i3 lists a memory bandwidth of 42.7 GB/s, while the Xeon’s bandwidth is not recorded in the database. Both use DDR4 with dual-channel memory buses. The Xeon’s market segment is Server/Workstation, while the Core i3 is classified as Desktop. The integrated graphics differ as well: the Xeon carries HD Graphics P630, while the Core i3 uses UHD Graphics 630. The Xeon’s die size is 160 mm² with 1,400 million transistors; the Core i3’s die size and transistor count are not recorded.

Sockets are another differentiator. The Xeon fits Intel Socket 1151, while the Core i3 requires Intel Socket 1200. This means the two chips are not drop-in interchangeable, and platform choice will dictate which CPU can be used. The Xeon’s part number is SR373; the Core i3’s is SRH3K.

FAQ

Q: Which processor has the higher base clock?

A: The Intel Xeon E3-1285 v6 runs at 4.10 GHz base, while the Intel Core i3-10305 runs at 3.80 GHz. Both share the same 4.50 GHz boost clock.

Q: Does the Core i3-10305 support ECC memory?

A: No. ECC memory support is exclusive to the Xeon E3-1285 v6 in this comparison. The Core i3 does not list ECC capability.

Q: Are these CPUs compatible with the same motherboard?

A: No. The Xeon uses Intel Socket 1151, while the Core i3 uses Intel Socket 1200. They require different platforms.

Q: What is the TDP difference between the two?

A: The Xeon E3-1285 v6 has a TDP of 79 watts, while the Core i3-10305 has a TDP of 65 watts. The Core i3 is the lower-power part.

Q: How much larger is the Xeon’s die compared to the Core i3?

A: The Xeon’s die size is 160 mm² with 1,400 million transistors. The Core i3’s die size and transistor count are not recorded in the database, so no direct comparison is possible.

Q: Which chip wins in multi-core Cinebench R23?

A: The Xeon E3-1285 v6 scores 8119 versus 7828 for the Core i3, a 3.7% advantage for the Xeon.

Specification Differences

The two processors differ in several recorded specifications. The Xeon E3-1285 v6 has a base clock of 4.10 GHz, while the Core i3-10305 sits at 3.80 GHz. Boost clocks are identical at 4.50 GHz. The Xeon has a TDP of 79 watts; the Core i3 is rated at 65 watts. Sockets differ: Socket 1151 for the Xeon versus Socket 1200 for the Core i3. The architecture differs as Kaby Lake-DT versus Comet Lake-R, with correspondingly different generations: Xeon E3 (Kaby Lake-DT) versus Core i3 (Comet Lake). Release dates differ, with the Xeon launched on 2017-07-31 and the Core i3 on 2021-03-15.

Memory support splits on ECC: the Xeon supports ECC memory, the Core i3 does not. The Core i3 lists a memory bandwidth of 42.7 GB/s; the Xeon has no recorded bandwidth figure. Integrated graphics differ: HD Graphics P630 on the Xeon versus UHD Graphics 630 on the Core i3. The market segments differ as Server/Workstation versus Desktop. The Xeon records a die size of 160 mm² and 1,400 million transistors; the Core i3 has no recorded values for either. The production status differs, with the Core i3 listed as Active while the Xeon has no recorded status.

Head-to-Head Benchmarks

All six head-to-head benchmark results favor the Intel Xeon E3-1285 v6, with no wins recorded for the Core i3-10305. The largest margin appears in Cinebench R15 multi-core, where the Xeon scores 818 against 788, a 3.8% lead. The R15 single-core test shows 115 versus 111, a 3.6% difference. The remaining four tests each show a 3.7% delta: R20 multi-core (3409 versus 3287), R20 single-core (481 versus 464), R23 multi-core (8119 versus 7828), and R23 single-core (1146 versus 1105).

The consistency of these margins is notable. Across different Cinebench versions and workload types, the Xeon’s advantage stays tightly clustered between 3.6% and 3.8%. This suggests a systematic performance edge rather than a workload-specific quirk. The higher base clock of 4.10 GHz versus 3.80 GHz likely contributes to this, as both chips boost to the same 4.50 GHz ceiling. In sustained multi-core workloads, the Xeon’s higher base clock may also help maintain performance, though its higher TDP of 79 watts versus 65 watts indicates it draws more power to achieve those results.

Looking at the broader database context, the Xeon’s average benchmark score of 2348 places it just 0.3% below the Intel Core i5-9600 and 0.5% below the AMD Ryzen 5 2500X. The Core i3’s average score of 2264 puts it 0.2% above the Intel Core i7-1068NG7 and 0.4% above the Intel Core i5-9400. Both processors are competitive with their nearest rivals, but the Xeon holds a clear, if modest, advantage over the Core i3 in every recorded benchmark. The percentile ranks reflect this: the Xeon sits at the 48th percentile of all CPUs, while the Core i3 sits at the 47th.

For users choosing between these two, the data shows the Xeon E3-1285 v6 is the faster part across the board, with margins that are small but uniform. The trade-offs are platform compatibility, power consumption, and feature set: the Xeon requires Socket 1151 and draws more power, but it adds ECC memory support and a workstation/server market classification. The Core i3 offers a newer release date, lower TDP, and desktop-oriented positioning, but it trails in every measured benchmark. Given the narrow performance gap, the decision may hinge on platform requirements and the need for ECC rather than raw speed.