Intel Core i3-10320 vs Intel Core i5-9600K Comparison

The Intel Core i3-10320 and the Intel Core i5-9600K are two desktop processors from Intel that, despite belonging to different generations and having different core counts, land remarkably close in overall benchmark averages. The i3-10320, a Comet Lake part on Socket 1200, posts an average benchmark score of 14852, while the older Coffee Lake i5-9600K on Socket 1151 scores 14605. This places the i3-10320 about 1.7% ahead of the i5-9600K in the aggregate data, with both CPUs holding the 69th percentile among all tested processors. The head-to-head results, however, tell a more nuanced story: the i5-9600K claims victory in 13 of the 17 direct comparisons, while the i3-10320 wins 4, most notably in encryption and single-threaded PassMark tests. The data reveals a classic trade-off between the i5's two extra physical cores and the i3's hyper-threading and slightly higher base clock.

FAQ

Q: Which processor has a higher average benchmark score?

A: The Intel Core i3-10320 has an average benchmark score of 14852, which is 1.7% higher than the Intel Core i5-9600K's average of 14605. The i3-10320 also appears among the i5-9600K's nearest rivals with that same deltaPct of 1.7.

Q: How do the two CPUs compare in multi-core rendering performance?

A: The i5-9600K leads in all multi-core Cinebench tests. In Cinebench R23 multi-core, the i5 scores 9055 versus the i3's 8486, a 6.3% advantage for the i5. Similarly, in Cinebench R20 multi-core, the i5 scores 3803 compared to the i3's 3564, another 6.3% gap.

Q: Does the i3-10320 win any benchmark categories?

A: Yes, the i3-10320 wins four head-to-head tests. It leads in PassMark data encryption (3458 vs 3269, a 5.8% advantage), PassMark integer math (31071 vs 29215, a 6.4% advantage), and PassMark single-thread (2841 vs 2727, a 4.2% advantage), with the latter result appearing twice in the data.

Q: What is the difference in physical core and thread counts?

A: The i5-9600K has 6 physical cores and 6 threads, while the i3-10320 has 4 physical cores and 8 threads due to hyper-threading. Despite having fewer cores, the i3's thread count is higher, which helps it stay competitive in some workloads.

Q: Are these processors on the same socket?

A: No. The i3-10320 uses Intel Socket 1200, whereas the i5-9600K uses Intel Socket 1151. This means they are not directly interchangeable on the same motherboard.

Q: Which CPU has the larger L3 cache?

A: The i5-9600K has 9 MB of shared L3 cache, while the i3-10320 has 8 MB of shared L3 cache. Both have identical per-core L1 (64 KB) and L2 (256 KB) cache configurations.

The Verdict

The data points to a clear but nuanced verdict. For users who prioritize raw multi-threaded throughput in rendering, physics simulation, or extended instruction workloads, the Intel Core i5-9600K is the better choice, as it wins the majority of head-to-head benchmarks by margins ranging from 2.7% to 28.1%. Its six physical cores give it a decisive edge in PassMark extended instructions (12914 vs 9284) and floating-point math (24913 vs 19483). On the other hand, the Intel Core i3-10320 is a compelling pick for workloads that are sensitive to single-thread performance and integer-heavy operations, where it leads by up to 6.4%. The i3 also wins in data encryption, suggesting a potential edge for security-related tasks. Given that the i3-10320 is from the newer Comet Lake generation and carries a higher average benchmark score, it may appeal to users building on Socket 1200 with an eye toward future upgrade paths, while the i5-9600K, now end-of-life, offers a more powerful physical core count for those on the older platform.

Head-to-Head Benchmarks

The most lopsided victory for the i5-9600K comes in PassMark extended instructions, where it scores 12914 against the i3's 9284—a massive 28.1% delta. This suggests the i5's extra cores are heavily leveraged in SIMD or specialized instruction workloads. Floating-point math similarly favors the i5, with a score of 24913 versus 19483, a 21.8% gap. Prime number finding also skews toward the i5, which scores 43 compared to the i3's 32, a 25.6% difference. In Cinebench tests, the i5 consistently wins by roughly 6.2% to 6.3% across both single-core and multi-core variants, indicating a uniform clock-for-clock advantage in rendering tasks. The i5 also edges out the i3 in PassMark multithread (10636 vs 9982, 6.1%), physics (746 vs 689, 7.6%), data compression (148639 vs 140255, 5.6%), and random string sorting (18313 vs 17821, 2.7%).

The i3-10320's wins are narrower but notable. Its best victory is in integer math, where it scores 31071 versus the i5's 29215, a 6.4% margin. In data encryption, the i3 leads with 3458 against 3269, a 5.8% swing. The i3 also claims single-thread superiority in PassMark, scoring 2841 versus 2727, a 4.2% advantage. Interestingly, this single-thread result contradicts the Cinebench single-core tests, where the i5 leads by 6.2% to 6.3%, suggesting that different benchmark suites measure single-threaded performance differently. Overall, the i5's 13 wins versus the i3's 4 wins demonstrate a wider breadth of performance, but the i3's victories in integer and encryption tasks indicate specific niches where it excels.

Specification Differences

The two processors differ in several fundamental specifications. The i3-10320 has 4 cores and 8 threads, while the i5-9600K has 6 cores and 6 threads, making the i5 a pure six-core part without hyper-threading. Base clocks differ slightly, with the i3 at 3.80 GHz and the i5 at 3.70 GHz, though both boost to 4.60 GHz. The i3 has a TDP of 91 watts, while the i5 is rated at 95 watts. They use different sockets: the i3 is on Intel Socket 1200, and the i5 is on Intel Socket 1151. The i3 is part of the 10th Gen Comet Lake series, whereas the i5 belongs to the Coffee Lake architecture. Cache sizes differ, with the i5 having 9 MB of shared L3 cache versus the i3's 8 MB. The i5 has an unlocked multiplier, allowing overclocking, while the i3 does not. Production status also diverges: the i3 is marked as Active, while the i5 is End-of-life. The i3 was released on 2020-04-29, while the i5's release date is 2018-10-18. Memory support is identical (DDR4, dual-channel, 42.7 GB/s), as is PCIe configuration (Gen 3, 16 lanes) and integrated graphics (UHD 630).

Architecture Differences

Both processors are built on Intel's 14 nm process node, but they represent different microarchitectures. The i3-10320 uses Comet Lake, while the i5-9600K uses Coffee Lake. This generational split explains their different sockets and release timelines. The i3's Comet Lake architecture brings hyper-threading to the Core i3 tier, giving it 8 threads from 4 cores, whereas the i5's Coffee Lake design offers 6 threads from 6 cores. The i3 has a newer generation label, "Core i3 (Comet Lake)", while the i5 is labeled "Core i5 (Coffee Lake Refresh)". Despite the architectural differences, both share the same per-core cache hierarchy of 64 KB L1 and 256 KB L2. The L3 cache differs by 1 MB, with the i5 having 9 MB and the i3 having 8 MB. Both integrate UHD Graphics 630, though the i3 lists it as "UHD Graphics 630" and the i5 simply as "UHD 630". The i5's unlocked multiplier is a feature absent from the i3, allowing manual overclocking on compatible boards, which is a significant architectural consideration for enthusiasts.

Where Each One Wins

The i5-9600K dominates in most compute-heavy scenarios. It wins in all Cinebench tests (R15, R20, R23) for both single and multi-core, indicating superior rendering performance across the board. Its wins in PassMark extended instructions, floating-point math, and prime number finding make it the stronger choice for scientific computing, financial modeling, or any workload that relies on heavy mathematical computation. The i5 also wins in data compression, physics, and random string sorting, which suggests it handles general productivity and simulation tasks more efficiently. Its multithread score of 10636 versus the i3's 9982 reinforces its overall throughput advantage. For users on a Socket 1151 platform, the i5's higher core count and unlocked multiplier make it a robust option for overclocking and sustained multi-core workloads.

The i3-10320 wins in a smaller but distinct set of scenarios. Its PassMark single-thread score of 2841 versus the i5's 2727 indicates it is the better pick for lightly-threaded applications that depend on per-core speed, such as legacy games or single-threaded productivity tools. Its integer math win (31071 vs 29215) points to advantages in database operations or integer-heavy processing. The encryption win (3458 vs 3269) suggests it may be preferable for VPN, disk encryption, or secure communication tasks. The i3's higher average benchmark score and newer Comet Lake architecture also make it a forward-looking choice for Socket 1200 builds, even if its core count is lower. Ultimately, the i5-9600K is the winner for raw compute breadth, while the i3-10320 offers targeted wins in single-thread, integer, and encryption workloads.