Intel Core i5-3330S vs Intel Xeon D-1518 Comparison

The Intel Core i5-3330S and the Intel Xeon D-1518 occupy very different corners of the Intel lineup, yet their average benchmark scores land within a hair of each other. The data shows a desktop processor from the Ivy Bridge era going up against a server-focused Broadwell chip, with the Xeon taking every head-to-head victory in the Cinebench suite despite its lower base clock. The i5-3330S counters with a higher boost clock and an integrated GPU, but the benchmark results suggest the Xeon’s architectural advantages outweigh its clock-speed deficit.

Head-to-Head Benchmarks

The head-to-head results are remarkably one-sided. Across all five Cinebench comparisons, the Intel Xeon D-1518 wins outright, with a consistent margin of roughly 14% over the i5-3330S. In the Cinebench R15 multicore test, the Xeon scores 390 against the i5’s 335, a delta of -14.1%. That pattern holds in Cinebench R20 multicore, where the Xeon’s 1628 beats the i5’s 1396 by 14.3%.

Single-core performance tells the same story, which is more surprising given the i5’s higher clock speeds. The i5-3330S has a base clock of 2.70 GHz and a boost of 3.20 GHz, while the Xeon D-1518 sits at a static 2.20 GHz with no boost clock listed. Yet in Cinebench R20 single-core, the Xeon scores 229 versus the i5’s 196, a 14.4% advantage. The Cinebench R23 results mirror this exactly: the Xeon leads 547 to 469 in single-core (14.3% delta) and 3877 to 3326 in multicore (14.2% delta).

The consistency of that ~14% gap across every test point suggests a fundamental efficiency difference rather than a workload-specific quirk. The Xeon’s 14 nm process node versus the i5’s 22 nm node likely explains much of this, as does the newer Broadwell architecture. Notably, the i5-3330S does not appear to have a Cinebench R15 single-core score listed, so the comparison is limited to the five tests where both chips have data. The win count is 5 for the Xeon, 0 for the i5, which leaves little room for interpretation.

Architecture Differences

The architectural gap between these two is substantial, even though both are Intel parts. The i5-3330S uses the Ivy Bridge architecture on a 22 nm process, with a die size of 133 mm². The Xeon D-1518 uses Broadwell on 14 nm, with a much larger die at 246 mm² and 3,200 million transistors. That transistor count is not listed for the i5, but the die size difference alone indicates the Xeon is packing far more hardware.

Core and thread counts differ as well. The i5 has 4 cores and 4 threads, meaning no Hyper-Threading. The Xeon D-1518 also has 4 cores but 8 threads, doubling the thread count. This is a critical advantage in the multicore tests, though it does not fully explain the single-core lead. Cache configurations also diverge: both have 64 KB of L1 per core and 256 KB of L2 per core, but the L3 cache is structured differently. The i5 has 6 MB shared, while the Xeon has 1.5 MB per core, which for 4 cores totals 6 MB as well. The per-core allocation on the Xeon may improve access latency in certain workloads.

Memory support is another differentiator. The i5 supports DDR3 only, while the Xeon supports both DDR3 and DDR4. Both use a dual-channel memory bus. ECC memory is a major split: the i5 does not support it, while the Xeon does, which is expected for a server/workstation part. PCIe lanes also differ, with the i5 offering Gen 3 with 16 lanes (CPU only) and the Xeon offering Gen 3 with 24 lanes (CPU only). The Xeon has no integrated graphics, while the i5 includes Intel HD 2500. Socket types are entirely different: the i5 uses Intel Socket 1155, while the Xeon uses Intel BGA 1667, meaning they are not interchangeable in any system.

Power consumption is a notable difference, though the numbers must be stated carefully. The i5 has a TDP of 77, while the Xeon has a TDP of 35. That lower power draw, combined with higher performance in the benchmarks, makes the Xeon a remarkably efficient part on paper. The Xeon’s production status is listed as "Active," while the i5’s is null, suggesting the older chip is no longer in production.

The Verdict

The data is unambiguous: the Intel Xeon D-1518 outperforms the Intel Core i5-3330S in every benchmark where both have scores. The ~14% lead in both single-core and multicore Cinebench tests, despite the i5’s higher clock speeds, points to a generational leap in architecture and process technology. The Xeon also brings ECC memory support, DDR4 compatibility, and more PCIe lanes, making it a more capable platform for server and workstation use.

The i5-3330S is not without its merits. It has integrated graphics, which the Xeon lacks entirely, and its higher boost clock of 3.20 GHz may help in lightly threaded tasks that do not rely on the newer architecture’s efficiency. But the benchmark results do not support that theory — the Xeon wins single-core tests too. The i5’s only real advantages are its older socket compatibility with 1155 boards and its integrated GPU, neither of which shows up in raw processing benchmarks.

Choosing between these two depends entirely on the use case. For a system that requires an integrated display output and fits into a desktop 1155 motherboard, the i5 is the only option of the two. For any workload where processing power and memory reliability matter more than graphics output, the Xeon D-1518 is the clear winner based on the data. The Xeon’s lower TDP of 35 versus the i5’s 77 also suggests it can deliver that performance in a more power-efficient package, which is significant for always-on server environments. The percentile rankings are identical at 32 for both, but the head-to-head scores tell a more nuanced story.

FAQ

Q: Which processor wins in multi-core performance?

A: The Intel Xeon D-1518 wins in every multi-core test. In Cinebench R23 multicore, it scores 3877 against the i5-3330S’s 3326, a 14.2% advantage. The Cinebench R20 multicore result is 1628 versus 1396, a 14.3% lead.

Q: Does the i5-3330S beat the Xeon D-1518 in any benchmark?

A: No. The head-to-head data shows the Xeon winning all 5 tests, with the i5’s best result being a 14.1% deficit in Cinebench R15 multicore. The i5 has zero wins in the comparison.

Q: Why does the Xeon win single-core tests despite a lower clock speed?

A: The Xeon D-1518 has a base clock of 2.20 GHz with no boost clock listed, while the i5-3330S has a 2.70 GHz base and 3.20 GHz boost. The Xeon still wins single-core Cinebench R23 547 to 469, a 14.3% margin. The likely explanation is the 14 nm Broadwell architecture versus the 22 nm Ivy Bridge design, though the data does not specify the exact cause.

Q: Do both processors support ECC memory?

A: No. The Xeon D-1518 supports ECC memory, while the i5-3330S does not. This makes the Xeon more suitable for error-sensitive server workloads.

Q: What are the thread counts for each chip?

A: The i5-3330S has 4 cores and 4 threads, while the Xeon D-1518 has 4 cores and 8 threads. The Xeon’s extra threads likely contribute to its multi-core performance advantage.

Q: Can these processors be used in the same motherboard?

A: No. The i5-3330S uses Intel Socket 1155, while the Xeon D-1518 uses Intel BGA 1667. They are physically and electrically incompatible.

Where Each One Wins

The Intel Xeon D-1518 wins in every processing benchmark category where both chips have data. That includes Cinebench R15 multicore, R20 multicore, R20 single-core, R23 multicore, and R23 single-core. The margins are consistently around 14%, which is a substantial gap for processors with similar average scores. The Xeon also wins on features that matter in server environments: ECC memory support, DDR4 compatibility, and 24 PCIe Gen 3 lanes versus the i5’s 16 lanes.

The Intel Core i5-3330S wins in areas that are not measured by the Cinebench suite. It has integrated graphics (Intel HD 2500), which the Xeon lacks completely. This means the i5 can power a display without a separate graphics card, while the Xeon requires dedicated graphics hardware. The i5 also has a higher boost clock at 3.20 GHz, which could theoretically benefit single-threaded applications that are sensitive to clock speed, though the benchmark data does not show this advantage materializing in Cinebench. The i5’s 77 TDP is higher than the Xeon’s 35, but that higher power draw comes with the integrated GPU and a desktop-friendly socket.

For desktop users building a basic system with an existing 1155 motherboard, the i5 is the practical choice. For anyone running a headless server, a virtualized environment, or a workstation where ECC memory is required, the Xeon D-1518 is the only viable option between the two. The data shows no scenario in the benchmarks where the i5 outperforms the Xeon, so the decision comes down to platform requirements rather than raw speed.

Specification Differences

The two processors differ in nearly every major specification category. The i5-3330S uses the Ivy Bridge architecture on a 22 nm process with a 133 mm² die, while the Xeon D-1518 uses Broadwell on 14 nm with a 246 mm² die and 3,200 million transistors. Core counts are the same at 4, but threads differ: 4 for the i5 versus 8 for the Xeon.

Clock speeds favor the i5 on paper, with a 2.70 GHz base and 3.20 GHz boost, compared to the Xeon’s 2.20 GHz base and no boost clock listed. TDP is a significant difference, with the i5 at 77 and the Xeon at 35. Sockets are incompatible: Intel Socket 1155 for the i5, Intel BGA 1667 for the Xeon.

Cache configurations are similar in total size but structured differently. Both have 64 KB L1 and 256 KB L2 per core. The i5 has 6 MB shared L3, while the Xeon has 1.5 MB per core, which totals 6 MB across 4 cores. Memory support differs, with the i5 limited to DDR3 and the Xeon supporting both DDR3 and DDR4. ECC memory is supported only on the Xeon. PCIe lanes also differ: 16 lanes for the i5, 24 lanes for the Xeon, both Gen 3.

Integrated graphics are present on the i5 (Intel HD 2500) but absent on the Xeon. The market segments reflect their intended uses: Desktop for the i5, Server/Workstation for the Xeon. Release dates are about 2.5 years apart, with the i5 launching in September 2012 and the Xeon in March 2015. The Xeon has a launch MSRP of $193, while the i5’s launch MSRP is not listed. The Xeon’s production status is Active, while the i5’s is not specified. Neither chip has an unlocked multiplier. Part numbers are SR0RR for the i5 and SR2DN for the Xeon.