CPU Comparison

The Intel Xeon D-1518 and Intel Core i3-7300 are two very different processors that land in nearly the same performance tier. The Xeon D-1518 is a 4-core, 8-thread Broadwell part designed for servers, while the Core i3-7300 is a 2-core, 4-thread Kaby Lake desktop chip. Despite their architectural differences, benchmark results show they are almost inseparable in compute performance. The data reveals a consistent, though narrow, advantage for the Xeon across every test, making this a comparison defined by margins of less than one percent.

Head-to-Head Benchmarks

The benchmark suite paints a picture of near-total parity, with the Xeon D-1518 taking a razor-thin lead in every single test. In Cinebench R15 multicore, the Xeon scores 390 against the Core i3's 388, a delta of just 0.5%. That pattern repeats in R20 multicore, where the Xeon's 1628 edges out the i3's 1619, a 0.6% advantage. The R23 multicore test shows the same story: 3877 for the Xeon versus 3856 for the Core i3, again a 0.5% gap.

Single-core results are even tighter. In Cinebench R15 single-core, both chips score exactly 54, resulting in a 0% delta. The R20 single-core test gives the Xeon a 229 to 228 win, a 0.4% margin. R23 single-core sees the Xeon at 547 against the i3's 544, a 0.6% difference. The Xeon D-1518 wins all six head-to-head matchups, yet the largest margin across the entire suite is just 0.6%. This is not a case of one chip dominating another; it is a case of one chip consistently, if barely, outscoring the other.

The average benchmark scores reinforce this proximity. The Xeon D-1518 posts an average score of 1121, while the Core i3-7300 sits at 1115. The Xeon's nearest rivals include the AMD Athlon 240GE at an identical 1121 and the Intel Core i7-2860QM at 1120, placing it in a tightly packed cluster. The Core i3's nearest rivals include the AMD Ryzen 3 1200 at 1116 and the Intel Core i5-3550S at 1118, showing it occupies a similar performance neighborhood. The Xeon ranks at the 32nd percentile among all CPUs, while the Core i3 sits at the 31st percentile, functionally equivalent positions.

The Verdict

From a pure performance standpoint, the data favors the Intel Xeon D-1518. It wins every benchmark in the head-to-head comparison, and its average benchmark score of 1121 is higher than the Core i3-7300's 1115. However, the margins are so small that they would be imperceptible in real-world use. A 0.6% lead in Cinebench R23 multicore is within run-to-run variance; it does not represent a meaningful performance advantage.

The choice between these two comes down to platform and feature requirements, not raw speed. The Xeon D-1518 is a server/workstation part with ECC memory support, a 35W TDP, and 24 PCIe Gen 3 lanes. It uses an Intel BGA 1667 socket and supports both DDR3 and DDR4 memory. The Core i3-7300 is a desktop part with a 51W TDP, no ECC support, 16 PCIe Gen 3 lanes, and integrated Intel HD 630 graphics. It uses Intel Socket 1151 and supports only DDR4 memory with a bandwidth of 38.4 GB/s.

The Xeon D-1518 is the pick for anyone needing ECC memory, lower power consumption, or a denser server platform with more PCIe lanes. The Core i3-7300 is the pick for a standard desktop build, particularly where integrated graphics are required, the Xeon has no integrated GPU. The Core i3's 4.00 GHz base clock is also notably higher than the Xeon's 2.20 GHz, which could matter in lightly threaded workloads, though the benchmark data shows no advantage from that clock speed in these tests.

Architecture Differences

The two chips come from different Intel architectures and target different markets. The Xeon D-1518 is built on Broadwell, a 14 nm process, and is part of the Xeon D (Broadwell-DE) generation. It packs 3,200 million transistors on a 246 mm² die. The Core i3-7300 uses Kaby Lake, also on a 14 nm process, but Intel lists no transistor count or die size for it in the data.

Core and thread counts differ significantly. The Xeon D-1518 has 4 cores and 8 threads, while the Core i3-7300 has 2 cores and 4 threads. The Xeon therefore has double the core and thread count, yet it only manages to match the Core i3 in performance. This is explained by clock speed: the Core i3 runs at 4.00 GHz base, while the Xeon runs at 2.20 GHz base. Neither chip has a boost clock listed.

Cache layouts also differ. Both have 64 KB of L1 cache per core and 256 KB of L2 cache per core. The L3 cache is where they diverge: the Xeon D-1518 provides 1.5 MB per core, while the Core i3-7300 offers 4 MB shared. The per-core L3 allocation works out to 6 MB total for the Xeon across its four cores, versus 4 MB total for the Core i3 across its two cores.

Memory support is another major differentiator. The Xeon D-1518 supports both DDR3 and DDR4 in a dual-channel configuration and enables ECC memory. The Core i3-7300 supports only DDR4 in dual-channel, has no ECC capability, and has a listed memory bandwidth of 38.4 GB/s. The Xeon's memory bandwidth is not specified in the data. PCIe connectivity also differs: the Xeon provides 24 Gen 3 lanes, while the Core i3 provides 16 Gen 3 lanes.

The Xeon D-1518 has no integrated graphics, making a discrete GPU mandatory. The Core i3-7300 includes Intel HD 630 integrated graphics. The Xeon launched on 2015-03-08 with a launch MSRP of $193; the Core i3-7300 launched on 2017-01-02 with no launch MSRP listed. Both parts remain in active production.

FAQ

Q: Which processor is faster in multi-core workloads?

A: The Intel Xeon D-1518 wins all three multi-core tests. It scores 390 in Cinebench R15 multicore versus 388 for the Core i3-7300, 1628 versus 1619 in R20 multicore, and 3877 versus 3856 in R23 multicore. The largest margin is 0.6%.

Q: Is the Core i3-7300 better for single-core performance?

A: No. The Xeon D-1518 wins or ties every single-core test. They tie at 54 in Cinebench R15 single-core, and the Xeon leads 229 to 228 in R20 and 547 to 544 in R23. The Core i3's higher 4.00 GHz base clock does not translate to a benchmark win.

Q: Does the Xeon D-1518 support ECC memory?

A: Yes, ECC memory is supported by the Xeon D-1518. The Core i3-7300 does not support ECC memory.

Q: Which processor has integrated graphics?

A: The Intel Core i3-7300 includes Intel HD 630 integrated graphics. The Intel Xeon D-1518 has no integrated graphics, so it requires a separate graphics card.

Q: How do these chips compare to their nearest rivals?

A: The Xeon D-1518's average benchmark score of 1121 exactly matches the AMD Athlon 240GE and is 0.1% ahead of the Intel Core i7-2860QM. The Core i3-7300's average of 1115 is 0% different from the AMD Ryzen 3 1200 at 1116 and 0.3% behind the Intel Core i5-3550S.

Q: What are the power consumption differences?

A: The Xeon D-1518 has a 35W TDP, while the Core i3-7300 has a 51W TDP. The Xeon consumes less power despite having more cores and threads.

Where Each One Wins

The Intel Xeon D-1518 wins in every benchmark category, but its advantages are narrow and specific. It takes the multicore tests by margins of 0.5% to 0.6%, and the single-core tests by 0.4% to 0.6%, with one tie. Its 6-0 sweep in head-to-head benchmarks makes it the performance winner across the board. The Xeon also wins on platform features that matter for servers: ECC memory support, a lower 35W TDP, 24 PCIe Gen 3 lanes, and compatibility with both DDR3 and DDR4 memory. Its 4-core, 8-thread configuration provides double the logical processors of the Core i3, which could be an advantage in heavily threaded server workloads, even if the benchmark data does not show a large improvement.

The Intel Core i3-7300 wins in areas that the benchmarks do not capture. It has integrated Intel HD 630 graphics, making it a complete desktop solution without a discrete GPU. Its 4.00 GHz base clock is nearly double the Xeon's 2.20 GHz, which could benefit latency-sensitive or lightly threaded desktop applications despite not showing up in these Cinebench results. Its 4 MB shared L3 cache is more than the Xeon's per-core allocation provides in aggregate, and its 38.4 GB/s memory bandwidth is explicitly listed, whereas the Xeon's bandwidth is unspecified. The Core i3 uses the standard Intel Socket 1151, which offers more mainstream motherboard compatibility than the Xeon's BGA 1667 soldered design.

In practical terms, the Xeon D-1518 is the choice for a low-power server or workstation where ECC memory and high PCIe lane counts are essential. The Core i3-7300 is the choice for a conventional desktop where integrated graphics, a higher clock speed, and standard socket compatibility take priority. The benchmark data says they perform the same; the platform data says they serve different purposes.