Intel Core i3-9350K

The Intel Core i3-9350K is a desktop processor introduced on April 22, 2019, at a launch MSRP of $184. It is a 4-core/4-thread Coffee Lake chip running at a 4.00 GHz base clock and a 4.60 GHz boost clock, built on Intel’s 14 nm process with a 126 mm² die. The part uses Intel Socket 1151, supports DDR4 dual-channel memory, includes UHD 630 integrated graphics, and has an unlocked multiplier. It is listed as end-of-life with part number SRCZT.

Benchmark Performance

The aggregate benchmark score for the Core i3-9350K is 1883, placing it at the 44th percentile of all CPUs tracked in this database. That is a mid-pack result, and the nearest rival data reinforces the position: every compared processor is within 0.3% of the i3-9350K’s average score. The Cinebench results follow the same pattern. In Cinebench R23, the chip scores 6512 in multi-core and 919 in single-core. In Cinebench R20, it scores 2735 multi-core and 385 single-core. In Cinebench R15, it scores 656 multi-core and 92 single-core.

These scores describe a processor with a high frequency ceiling but a compact thread count. The average score of 1883 is not spectacular against the broader CPU field, yet the narrow deltas in the nearest rival group show that the i3-9350K sits in a tightly packed performance tier. The Intel Xeon E3-1270L v4 matches it exactly, with an average score of 1883 and a deltaPct of 0. The Core i7-4940MX posts 1884 and a deltaPct of -0.1, making the i3-9350K marginally slower. The Core i3-9100F posts 1881 and a deltaPct of 0.1, giving the i3-9350K a marginal edge. The Xeon E3-1545M v5 posts 1889 and a deltaPct of -0.3, the largest gap in the set but still a tiny one.

Benchmark results indicate that the i3-9350K is not a category leader. Instead, it is positioned among a cluster of CPUs whose aggregate performance is nearly identical. The 44th percentile ranking means a clear majority of all processors in the database score higher, but the data also shows that the nearest competitors are separated by tenths of a percent, not by a meaningful performance gulf.

Power and Thermals

The Core i3-9350K is rated at a 91W TDP. That figure, combined with a 14 nm process and a 126 mm² die, places it in a modest thermal class for a desktop processor. The data does not include a cooler in the specification, but a 91W TDP implies that a capable air cooler is sufficient for stock operation. The unlocked multiplier changes the picture when overclocking is considered: pushing the chip beyond its 4.60 GHz boost clock will demand more thermal headroom than the stock rating provides.

The 91W TDP is a useful anchor for system builders. It is lower than what many high-core-count desktop parts require, so cooling and power-delivery requirements are not extreme. However, the chip’s architecture and clock speeds are still enough to generate meaningful heat under sustained multi-threaded load. For anyone using the i3-9350K in a compact desktop build, the thermal envelope is manageable, while overclocking should be paired with a stronger cooling solution.

Single-Thread vs Multi-Thread Behavior

The Cinebench results make the single-thread versus multi-thread split clear. In Cinebench R15, the single-core score is 92 and the multi-core score is 656. In Cinebench R20, the single-core score is 385 and the multi-core score is 2735. In Cinebench R23, the single-core score is 919 and the multi-core score is 6512. These numbers are consistent across all three versions of the benchmark: the i3-9350K delivers solid single-thread performance while its multi-thread output is constrained by having only four threads.

The 4.60 GHz boost clock is the main driver of the single-thread results. Lightly threaded workloads, such as many desktop applications, can exploit that frequency and respond well. The 4-core/4-thread design limits the multi-thread side. Workloads that scale across many threads will exhaust the chip’s resources quickly, and the multi-core scores reflect that ceiling. The 6512 R23 multi-core result is respectable for a four-thread part, but it does not approach the level of processors with more physical cores.

This behavior makes the i3-9350K a better fit for latency-sensitive tasks than for heavily threaded rendering or compilation workloads. The data shows a processor whose single-thread capability is high relative to its multi-thread capability. That profile is typical of a chip designed to run at high clocks while keeping the core count low.

Platform and Compatibility

The Core i3-9350K is built around Intel Socket 1151 and the Coffee Lake architecture. The memory controller supports DDR4 in dual-channel mode, with 38.4 GB/s of bandwidth. The processor also supports ECC memory, which expands its usefulness in systems where error-correcting memory is required. PCIe is Gen 3 with 16 lanes from the CPU only. The cache layout is 64 KB of L1 and 256 KB of L2 per core, plus 8 MB of shared L3.

The integrated UHD 630 graphics are present, so a discrete GPU is not mandatory for basic display output. The multiplier is unlocked, giving overclocking headroom on compatible Socket 1151 boards. The processor was released on April 22, 2019, and is now end-of-life. That status has practical implications: the platform is mature, and the upgrade path for an existing Socket 1151 user depends on the specific motherboard’s compatibility list. The part number SRCZT identifies this particular chip.

How It Compares

The Core i3-9350K’s average score of 1883 places it in the middle of its nearest rival group. The differences among these CPUs are small enough that benchmark positioning, rather than raw performance, separates them.

Intel Xeon E3-1270L v4: This Xeon has an average score of 1883 and a deltaPct of 0. The two processors are exact aggregate performance equivalents in the database. No workload advantage can be inferred from the overall benchmark score.

Intel Core i7-4940MX: The i7-4940MX averages 1884 with a deltaPct of -0.1. The i3-9350K trails by 0.1%, which is effectively indistinguishable in real-world use. The two chips sit at the same performance level.

Intel Core i3-9100F: The i3-9100F averages 1881 with a deltaPct of 0.1. The i3-9350K leads by 0.1%, a margin small enough that the two parts are interchangeable in the aggregate data. This is the only rival in the group that the i3-9350K sits above.

Intel Xeon E3-1545M v5: The Xeon E3-1545M v5 averages 1889 with a deltaPct of -0.3. It is the fastest of the four nearest rivals by a narrow margin, and the i3-9350K’s 0.3% gap is the largest difference in this comparison set. Even so, the performance distance is minimal.