Intel Core i3-9350KF vs Intel Xeon E3-1270 v5 Comparison

Head-to-Head Benchmarks

The recorded data is unambiguous: the Intel Xeon E3-1270 v5 wins every single benchmark in the head-to-head comparison against the Intel Core i3-9350KF. Out of six tested workloads, the Xeon takes all six. The margins are consistent, hovering around 10% across the board. This is not a close contest with split victories; it is a systematic advantage for the older server-class part.

In Cinebench R15 multi-core, the Xeon E3-1270 v5 scores 713 against the Core i3-9350KF’s 640, a 10.2% lead. The single-core R15 result tells the same story: 100 versus 90, a 10% gap. Moving to Cinebench R20, the Xeon posts 2974 in multi-core versus 2667, and 419 in single-core versus 376, both showing a 10.3% advantage. The newest Cinebench R23 test repeats the pattern exactly: the Xeon scores 7082 multi-core and 999 single-core, while the Core i3 manages 6352 and 896, again with a 10.3% delta.

What is striking is the uniformity of the margin. Whether the workload is single-threaded or multi-threaded, whether it is an older render test or a newer one, the Xeon E3-1270 v5 maintains roughly the same 10% lead. That consistency suggests the advantage is not workload-specific but structural, baked into the design of the chip itself. The Core i3-9350KF, despite its higher clock speeds, cannot close the gap in any measured scenario.

The average benchmark score in the database reinforces this picture. The Core i3-9350KF has an average score of 2082, placing it at the 46th percentile of all CPUs. The Xeon E3-1270 v5 has an average score of 2048, also at the 46th percentile. The two parts sit at the same percentile rank, but the head-to-head numbers show the Xeon pulling ahead in every direct comparison. The Core i3’s nearest rivals include the Intel Xeon W-2123 at 2079 (0.2% behind) and the AMD Ryzen Embedded R2544 at 2086 (0.2% ahead). The Xeon E3-1270 v5’s nearest rivals include the Intel Core i7-7820HK at 2048 (0% delta) and the AMD Ryzen 5 7520U at 2046 (0.1% behind). Both CPUs are clustered in a tight performance band, but within that band, the Xeon consistently outruns the Core i3.

Where Each One Wins

The Xeon E3-1270 v5 wins everywhere in the recorded benchmarks. There is no test in the head-to-head set where the Core i3-9350KF comes out ahead. That includes both single-core and multi-core workloads, which is notable because the Core i3 has a higher base clock (4.00 GHz versus 3.60 GHz) and a higher boost clock (4.60 GHz versus 4.00 GHz). Clock speed alone does not translate into a win here. The Xeon’s 8 threads, versus the Core i3’s 4 threads, likely play a decisive role in multi-core tests, but the single-core results also favor the Xeon despite its lower clocks.

For users who prioritize raw thread count and consistent performance across render workloads, the Xeon E3-1270 v5 is the clear choice. Its 8 threads allow it to sustain higher scores in Cinebench R15, R20, and R23 multi-core tests, and its single-core scores are also superior. The Core i3-9350KF, with only 4 threads and no integrated graphics, occupies a different position: it is a desktop part with a higher clock speed but fewer threads, and the data shows that this combination loses in every measured category.

The market segments reinforce the split. The Core i3-9350KF is listed as a Desktop part, while the Xeon E3-1270 v5 is listed as Server/Workstation. The Xeon’s 8 threads and ECC memory support align with server-style workloads, while the Core i3’s higher clocks align with desktop responsiveness. Yet in the actual benchmark data, the server part wins even the desktop-style single-thread tests. That means the Xeon is not merely better for servers; it is better for general compute as well, at least within the scope of these Cinebench and Geekbench results.

The Core i3-9350KF does have a Geekbench multi-core score of 4098 and a single-core score of 1534, but the Xeon E3-1270 v5 was not tested in Geekbench, so no direct comparison exists there. In the tests that cover both parts, the Xeon wins all of them. There is no benchmark category, no specific workload, and no usage scenario in the data where the Core i3 takes the lead.

Architecture Differences

The two CPUs come from different architectural generations and different market families. The Core i3-9350KF uses the Coffee Lake architecture, specifically the Coffee Lake Refresh generation, while the Xeon E3-1270 v5 uses Skylake, specifically the Skylake-DT generation. Both are built on the same 14 nm process node and both are manufactured by Intel, but the transistor counts and die sizes differ. The Xeon E3-1270 v5 has 1,750 million transistors on a 122 mm² die, while the Core i3-9350KF does not have a listed transistor count but has a die size of 126 mm². The die sizes are close, but the Xeon packs more transistors into a slightly smaller area.

The core and thread counts are a major differentiator. The Core i3-9350KF has 4 cores and 4 threads, meaning no hyper-threading. The Xeon E3-1270 v5 has 4 cores and 8 threads, which doubles the thread count. This explains the multi-core performance gap. In a render workload that can use 8 threads, the Xeon has twice the logical resources to draw from. The single-core advantage is harder to explain from architecture alone, but the data shows the Xeon winning there too.

Cache layouts are identical in structure: both have 64 KB of L1 per core and 256 KB of L2 per core, with 8 MB of shared L3 cache. No difference exists in the cache hierarchy. Memory support differs, however. The Core i3-9350KF supports DDR4 only, with dual-channel memory and a bandwidth of 38.4 GB/s. The Xeon E3-1270 v5 supports both DDR3 and DDR4, also dual-channel, but with a lower bandwidth of 34.1 GB/s. Despite the lower memory bandwidth, the Xeon still outperforms the Core i3 in every benchmark, suggesting that memory throughput is not the limiting factor in these tests.

Both CPUs support ECC memory, which is unusual for a Core i3 part and typical for a Xeon. Both use PCIe Gen 3 with 16 lanes from the CPU. Neither has integrated graphics. The multiplier is locked on both, so overclocking is not an option for either. The socket is the same for both: Intel Socket 1151. The production status is end-of-life for both, and neither is currently in active production.

Clock speeds are the most visible difference. The Core i3-9350KF runs at 4.00 GHz base and 4.60 GHz boost, while the Xeon E3-1270 v5 runs at 3.60 GHz base and 4.00 GHz boost. The Core i3 is faster on paper, yet slower in practice. The TDP also differs: the Core i3 is rated at 91 watts, the Xeon at 80 watts. The Xeon draws less power while delivering more performance, a direct efficiency advantage. The release dates are far apart, with the Xeon arriving on 2015-10-18 and the Core i3 on 2019-01-07, nearly four years later. The newer part loses to the older one.

The Verdict

The data leads to a simple conclusion: the Intel Xeon E3-1270 v5 is the faster CPU in every benchmark where the two are directly compared. The Core i3-9350KF, despite being released later and having higher clock speeds, trails by approximately 10% in all six head-to-head tests. The Xeon’s 8 threads give it a decisive edge in multi-core workloads, and its single-core scores are also higher, meaning there is no scenario in the recorded data where the Core i3 is preferable on performance grounds.

The Core i3-9350KF’s average benchmark score of 2082 is slightly above the Xeon’s 2048, but that average includes Geekbench results for the Core i3 that have no corresponding Xeon measurement. In the tests that cover both, the Xeon wins outright. The percentile ranks are identical at 46, placing both CPUs in the middle of the database, but the head-to-head results are not close.

Users who need thread-heavy performance for rendering, compilation, or any parallel workload should choose the Xeon E3-1270 v5. The 8 threads deliver a consistent 10% advantage in multi-core Cinebench tests, and the lower TDP of 80 watts means it does so with less power draw. Users who are locked into a desktop platform with higher clock speeds might be tempted by the Core i3-9350KF’s 4.60 GHz boost, but the benchmark data shows that this clock advantage does not materialize into wins. The Xeon wins single-core tests despite a 0.4 GHz lower boost clock.

The launch MSRP for the Core i3-9350KF is $173, while the launch MSRP for the Xeon E3-1270 v5 is $339. The Xeon costs more at launch, but it also delivers more performance in every measured test. The production status is end-of-life for both, so availability may vary, but on a pure performance basis, the Xeon E3-1270 v5 is the superior choice. The Core i3-9350KF is not the winner in any benchmark, and no analysis of the recorded data can place it ahead.

FAQ

Q: Which CPU has the higher boost clock?

A: The Intel Core i3-9350KF has a boost clock of 4.60 GHz, while the Intel Xeon E3-1270 v5 has a boost clock of 4.00 GHz.

Q: Does the Core i3-9350KF ever beat the Xeon E3-1270 v5 in any benchmark?

A: No. In the six head-to-head tests (Cinebench R15, R20, and R23, both single and multi-core), the Xeon E3-1270 v5 wins all six.

Q: What is the thread count difference between the two?

A: The Core i3-9350KF has 4 threads, while the Xeon E3-1270 v5 has 8 threads. Both have 4 cores.

Q: Which CPU supports ECC memory?

A: Both the Core i3-9350KF and the Xeon E3-1270 v5 support ECC memory.

Q: What is the TDP of each CPU?

A: The Core i3-9350KF has a TDP of 91 watts, while the Xeon E3-1270 v5 has a TDP of 80 watts.

Q: What memory types does each CPU support?

A: The Core i3-9350KF supports DDR4 only. The Xeon E3-1270 v5 supports both DDR3 and DDR4.

Q: Are both CPUs on the same socket?

A: Yes, both use Intel Socket 1151, and both have PCIe Gen 3 with 16 lanes from the CPU.

Specification Differences

| Field | Intel Core i3-9350KF | Intel Xeon E3-1270 v5 |

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

| Cores | 4 | 4 |

| Threads | 4 | 8 |

| Base Clock | 4.00 GHz | 3.60 GHz |

| Boost Clock | 4.60 GHz | 4.00 GHz |

| TDP | 91 W | 80 W |

| Architecture | Coffee Lake | Skylake |

| Codename | Coffee Lake | Skylake-DT |

| Generation | Core i3 (Coffee Lake Refresh) | Xeon E3 (Skylake-DT) |

| Transistors | Not listed | 1,750 million |

| Die Size | 126 mm² | 122 mm² |

| Memory Support | DDR4 | DDR3, DDR4 |

| Memory Bandwidth | 38.4 GB/s | 34.1 GB/s |

| Market Segment | Desktop | Server/Workstation |

| Release Date | 2019-01-07 | 2015-10-18 |

| Launch MSRP | $173 | $339 |

| Part Number | SRF7V | SR2LF |

Both CPUs share the same L1 cache (64 KB per core), L2 cache (256 KB per core), and L3 cache (8 MB shared). Both have ECC memory support, dual-channel memory buses, PCIe Gen 3 with 16 lanes, no integrated graphics, and locked multipliers. Both are end-of-life products. The Xeon E3-1270 v5 has 8 threads, a lower TDP, more transistors, and a smaller die, while the Core i3-9350KF has higher clocks, higher memory bandwidth, and a later release date. The benchmark data shows that the Xeon’s thread advantage and architectural efficiency outweigh the Core i3’s clock speed and memory bandwidth advantages in every tested workload.