Intel Core i3-9350K vs Intel Xeon E3-1270L v4 Comparison

The Verdict

The benchmark data presents a remarkably one-sided picture: the Intel Xeon E3-1270L v4 wins all six head-to-head Cinebench comparisons against the Intel Core i3-9350K, despite being four years older and having a significantly lower clock speed. The Xeon’s advantage is consistent but narrow, ranging from 0.8% to 1.1% across single- and multi-threaded tests. In practical terms, the data shows the Xeon E3-1270L v4 edges out the Core i3-9350K in every measured workload, which is notable given that the Core i3 runs at a 4.00 GHz base clock and 4.60 GHz boost, compared to the Xeon’s 3.00 GHz base and 3.60 GHz boost. The Xeon achieves this with 8 threads versus the Core i3’s 4 threads, and at a 45W TDP versus the Core i3’s 91W TDP.

The Core i3-9350K is not without its own merits: it is a desktop processor with an unlocked multiplier (the Xeon is locked), includes UHD 630 integrated graphics (the Xeon has none), and supports DDR4 memory with a higher theoretical bandwidth of 38.4 GB/s versus the Xeon’s DDR3 at 29.9 GB/s. However, none of these advantages translate into a single benchmark win. For anyone choosing strictly on Cinebench performance, the Xeon E3-1270L v4 is the superior part. The Core i3-9350K remains relevant only for users who prioritize the unlocked multiplier, integrated graphics, or DDR4 platform compatibility — but the performance data cannot justify that choice. The verdict is clear: the Xeon wins on raw compute scores, while the Core i3 wins on platform features that do not affect the measured benchmarks.

Where Each One Wins

The Xeon E3-1270L v4 wins every benchmark category, which makes the use-case split straightforward. In multi-threaded workloads, the Xeon’s 8 threads provide a measurable edge. The Cinebench R20 multicore test shows the Xeon at 2735 versus the Core i3’s 2711, a 0.9% lead. The Cinebench R23 multicore result follows the same pattern: 6512 versus 6456, again a 0.9% advantage. Even in single-threaded tests, where the Core i3’s 4.60 GHz boost clock should theoretically dominate, the Xeon wins by 1.1% in Cinebench R15 single-core (92 versus 91) and by 0.8-0.9% in R20 and R23 single-core tests. This suggests the Xeon’s architecture or memory subsystem compensates for the clock deficit.

The Core i3-9350K does not win any benchmark, but it does offer features that matter outside of Cinebench. It has an unlocked multiplier, meaning it can be overclocked, whereas the Xeon’s multiplier is locked. It also includes integrated graphics (UHD 630), which the Xeon lacks entirely — the Xeon has no integrated graphics at all. The Core i3 supports DDR4 memory with a dual-channel bus and 38.4 GB/s bandwidth, while the Xeon is limited to DDR3 at 29.9 GB/s. For workloads that are sensitive to memory bandwidth or benefit from integrated graphics for display output without a discrete GPU, the Core i3 has a structural advantage. However, in the six Cinebench tests measured, that advantage never materializes.

Architecture Differences

The two processors come from different architectural eras and serve different market segments. The Xeon E3-1270L v4 is built on Broadwell-DT, a 14 nm process, with a die size of 182 mm². It is a server/workstation part on Intel Socket 1150, released in June 2015. The Core i3-9350K is a Coffee Lake Refresh desktop chip, also on 14 nm but with a smaller die at 126 mm², on Intel Socket 1151, released in April 2019. Both have 4 physical cores, but the Xeon supports 8 threads via Hyper-Threading, while the Core i3 has only 4 threads with no multi-threading.

Cache configurations differ slightly. Both have 64 KB of L1 cache per core and 256 KB of L2 cache per core. The shared L3 cache, however, is 6 MB on the Xeon versus 8 MB on the Core i3. The Core i3’s larger L3 cache does not translate into a benchmark win, but it is a structural difference that could influence other workloads. The Xeon supports ECC memory, as does the Core i3 (though ECC on Core i3 typically requires a server chipset). The Xeon’s memory is DDR3, while the Core i3 uses DDR4, and the Core i3’s measured memory bandwidth is higher at 38.4 GB/s versus 29.9 GB/s.

Power characteristics are starkly different: the Xeon is rated at 45W TDP, the Core i3 at 91W TDP. Both use PCIe Gen 3 with 16 lanes (CPU only). The Core i3 has an unlocked multiplier and integrated graphics; the Xeon has neither. The Xeon is in the 43rd percentile of all CPUs by average benchmark score, while the Core i3 sits at the 42nd percentile. The average benchmark scores are 1883 for the Xeon and 1867 for the Core i3, a difference of 16 points. The nearest rivals for each confirm their positioning: the Xeon’s closest competitor is the Intel Xeon D-1531 (1885, -0.1% delta), while the Core i3’s closest is the Xeon E5-1630 v4 (1869, -0.1% delta). Both chips are effectively mid-pack performers, but the Xeon sits marginally higher.

FAQ

Q: Which processor has better multi-core performance?

A: The Xeon E3-1270L v4 wins all three multi-core tests. In Cinebench R15 multi-core, it scores 656 versus the Core i3’s 650, a 0.9% lead. In R20, it scores 2735 versus 2711, and in R23, 6512 versus 6456 — both also 0.9% advantages.

Q: Is the Core i3-9350K faster in single-core tests due to its higher clock speed?

A: No. Despite a 4.60 GHz boost clock versus the Xeon’s 3.60 GHz, the Core i3 loses every single-core test. The Xeon wins R15 single-core by 1.1% (92 versus 91), R20 by 0.8% (385 versus 382), and R23 by 0.9% (919 versus 911).

Q: Do the processors support ECC memory?

A: Yes, both list ECC memory support. However, the Xeon uses DDR3 memory with a dual-channel bus and 29.9 GB/s bandwidth, while the Core i3 uses DDR4 with a dual-channel bus and 38.4 GB/s bandwidth.

Q: Which processor has integrated graphics?

A: Only the Core i3-9350K has integrated graphics, specifically UHD 630. The Xeon E3-1270L v4 has no integrated graphics, so it requires a discrete GPU for display output.

Q: Can either processor be overclocked?

A: The Core i3-9350K has an unlocked multiplier, enabling overclocking. The Xeon E3-1270L v4 has a locked multiplier, so it cannot be overclocked.

Q: How do their overall standings compare?

A: The Xeon sits in the 43rd percentile of all CPUs with an average benchmark score of 1883. The Core i3 is in the 42nd percentile with an average score of 1867. The Xeon’s nearest rival is the Intel Xeon D-1531 (1885), while the Core i3’s nearest rival is the Xeon E5-1630 v4 (1869).

Head-to-Head Benchmarks

The head-to-head results are consistent across all six Cinebench iterations, with the Xeon E3-1270L v4 taking every win by a margin of less than 1.1%. The largest victory for the Xeon comes in Cinebench R15 single-core, where it scores 92 against the Core i3’s 91, a 1.1% delta. This is the only test where the margin exceeds 1%. In the multi-core R15 test, the Xeon scores 656 versus 650, a 0.9% lead.

Moving to Cinebench R20, the Xeon continues its sweep. In the multi-core test, it scores 2735 versus 2711, which is a 0.9% advantage (24 points). The single-core R20 test shows a 0.8% delta: 385 versus 382, a 3-point gap. These are narrow margins, but they are consistent — the Xeon never loses ground, even in tests that should favor the Core i3’s higher clock speeds.

The Cinebench R23 results mirror the earlier tests. The Xeon scores 6512 in multi-core versus the Core i3’s 6456, a 0.9% delta (56 points). In single-core R23, the Xeon scores 919 versus 911, again 0.9% (8 points). Across all six tests, the Xeon wins by a total of 6-0, with an average delta of approximately 0.9%. The Core i3’s best relative showing is in the single-core R20 test, where it trails by only 0.8%, but it never manages to pull ahead.

The data suggests that the Xeon’s 8-thread capability provides a slight edge in multi-core tests, but its single-core wins are more surprising given the Core i3’s 1.00 GHz higher base clock and 1.00 GHz higher boost clock. The Xeon’s 6 MB L3 cache versus the Core i3’s 8 MB does not appear to hurt it. The Core i3’s higher memory bandwidth (38.4 GB/s versus 29.9 GB/s) also fails to produce a win. In every measurable way within these benchmarks, the Xeon E3-1270L v4 is the superior processor, albeit by a narrow margin that would be imperceptible in real-world use. The Core i3-9350K’s features — unlocked multiplier, integrated graphics, DDR4 support — are real, but they do not alter the benchmark outcome.