Intel Core i5-10600 vs Intel Core i7-6800K Comparison

The Intel Core i7-6800K and the Intel Core i5-10600 are both six-core, twelve-thread desktop processors, but they represent vastly different eras of Intel’s design philosophy. The former is a Broadwell-E enthusiast part from the HEDT platform, while the latter is a mainstream Comet Lake chip. Benchmark data shows a remarkably consistent performance gap across every test, with the i5-10600 taking a clean sweep of all six head-to-head comparisons. Despite the i7-6800K’s higher platform pedigree, its architectural age and lower clock speeds place it firmly behind in raw compute performance.

Head-to-Head Benchmarks

The most striking pattern in the data is the uniformity of the i5-10600’s victory. Across all three generations of Cinebench (R15, R20, and R23), the margin is nearly identical, hovering around 7.3% to 7.4% regardless of whether the workload is single-threaded or multi-threaded. This consistency suggests the difference is not workload-specific but rather a fundamental clock-speed and IPC advantage.

Starting with multi-core performance, the i5-10600 scores 988 in Cinebench R15 against the i7-6800K’s 916, a delta of -7.3% from the i7’s perspective. The gap widens slightly in absolute points in Cinebench R20, where the i5-10600 posts 4119 versus 3819, again a -7.3% difference. In Cinebench R23 multi-core, the i5-10600 reaches 9809, while the i7-6800K manages 9093, maintaining the same -7.3% delta. These results indicate that the i5-10600’s higher boost clock of 4.80 GHz, compared to the i7-6800K’s 3.60 GHz, provides a decisive edge in sustained threaded workloads, even though both processors have identical core and thread counts.

Single-core performance tells a similar story, but with a slightly larger relative gap in one instance. In Cinebench R15 single-core, the i5-10600 scores 139 versus the i7-6800K’s 129, a -7.2% delta. The R20 single-core test shows the i5-10600 at 581 against 538, which is a -7.4% difference. Cinebench R23 single-core follows suit, with the i5-10600 at 1384 and the i7-6800K at 1283, a -7.3% delta. The i5-10600’s advantage here is particularly notable because the i7-6800K’s base clock is actually higher (3.40 GHz vs 3.30 GHz), yet the i5’s much higher boost ceiling and newer microarchitecture still produce a clear win.

Beyond the Cinebench suite, Geekbench data is only available for the i7-6800K, but it provides useful context for the older chip’s standing. The i7-6800K scores 5688 in Geekbench multi-core and 1237 in single-core. Given the consistent ~7.3% deficit observed in all six head-to-head tests, one could reasonably extrapolate a similar margin in Geekbench, but the data does not include a direct comparison. Notably, the i7-6800K’s average benchmark score across all tests is 2838, while the i5-10600’s is 2837, a difference of just 1 point. This near-identical average is ironic given the consistent per-test losses, but it reflects that the i7-6800K has additional benchmark entries (Geekbench) that may skew its average.

The head-to-head table confirms a clean sweep: the i5-10600 wins all six tests, with the i7-6800K recording zero wins. The deltas are all negative for the i7-6800K, ranging from -7.2% to -7.4%. This uniformity is a strong indicator that the i5-10600 is simply the faster processor in every measurable compute scenario, with no single test where the i7-6800K’s platform advantages (like quad-channel memory) translate into a performance benefit.

FAQ

Q: Which processor has a higher average benchmark score?

A: The two are effectively tied. The Intel Core i7-6800K has an average benchmark score of 2838, while the Intel Core i5-10600 averages 2837, a difference of just 1 point.

Q: How much faster is the i5-10600 in multi-core Cinebench R23?

A: The i5-10600 scores 9809 in Cinebench R23 multi-core, compared to the i7-6800K’s 9093. This represents a -7.3% delta from the i7-6800K’s perspective, meaning the i5-10600 is roughly 7.3% ahead.

Q: Do both processors have the same number of cores and threads?

A: Yes, both the Intel Core i7-6800K and the Intel Core i5-10600 feature 6 cores and 12 threads.

Q: What is the single-core performance difference in Cinebench R20?

A: In Cinebench R20 single-core, the i5-10600 scores 581, while the i7-6800K scores 538. The delta is -7.4% from the i7-6800K’s perspective.

Q: Which processor has a higher boost clock?

A: The Intel Core i5-10600 has a boost clock of 4.80 GHz, which is significantly higher than the Intel Core i7-6800K’s boost clock of 3.60 GHz.

Q: Is the i7-6800K’s memory bandwidth advantage reflected in benchmark scores?

A: No, despite the i7-6800K having quad-channel memory with 76.8 GB/s bandwidth versus the i5-10600’s dual-channel 42.7 GB/s, the i5-10600 still wins all six head-to-head benchmarks. The compute tests do not appear to benefit from the higher memory bandwidth.

Architecture Differences

The architectural gulf between these two processors is substantial. The i7-6800K is built on the Broadwell-E microarchitecture, specifically the Broadwell-E codename, while the i5-10600 uses the Comet Lake architecture. Both are manufactured on a 14 nm process node at Intel’s foundry, but the design philosophies differ greatly. Broadwell-E is a high-end desktop (HEDT) part designed for maximum platform expansion, whereas Comet Lake is a mainstream part optimized for high clock speeds and efficiency.

The i7-6800K sports a larger L3 cache of 15 MB shared, compared to the i5-10600’s 12 MB shared. However, the i5-10600 compensates with a dramatically higher boost clock: 4.80 GHz versus 3.60 GHz. This 1.2 GHz difference is the single largest architectural differentiator in terms of performance impact. The i7-6800K’s base clock is 3.40 GHz, slightly higher than the i5-10600’s 3.30 GHz, but the boost behavior tells the real story.

Cache hierarchy is otherwise identical in structure: both have 64 KB of L1 per core and 256 KB of L2 per core. The foundry is the same (Intel), and the process node is the same (14 nm). However, the i7-6800K has a distinct transistor count of 3,400 million and a die size of 246 mm², while the i5-10600’s transistor count and die size are not listed in the data. The i7-6800K also supports quad-channel memory, whereas the i5-10600 is limited to dual-channel, resulting in a memory bandwidth of 76.8 GB/s versus 42.7 GB/s.

One major architectural divergence is the presence of integrated graphics. The i5-10600 includes UHD Graphics 630, while the i7-6800K has no integrated graphics at all. This means the i7-6800K requires a discrete GPU for any display output, whereas the i5-10600 can operate with a basic display adapter. The i7-6800K also offers more PCIe lanes: 28 lanes of Gen 3 (CPU only) versus the i5-10600’s 16 lanes of Gen 3. This makes the i7-6800K better suited for multi-GPU configurations or high-bandwidth expansion cards, despite its lower compute performance.

Specification Differences

The specification sheets reveal several key divergences beyond the core count. The most obvious is the socket: the i7-6800K uses Intel Socket 2011-3, while the i5-10600 uses Intel Socket 1200. These are not interchangeable, meaning platform choice is dictated by the processor. The i7-6800K’s TDP is 140 watts, more than double the i5-10600’s 65 watts, reflecting the HEDT design’s higher power draw even at lower clocks.

Memory support is another differentiator. The i7-6800K supports quad-channel DDR4 memory with a theoretical bandwidth of 76.8 GB/s, while the i5-10600 supports dual-channel DDR4 with 42.7 GB/s. Neither supports ECC memory. The PCIe lane count also differs: 28 lanes for the i7-6800K versus 16 lanes for the i5-10600, both Gen 3.

The i7-6800K has an unlocked multiplier, making it easier to overclock, while the i5-10600 has a locked multiplier. The i5-10600 includes integrated graphics (UHD Graphics 630), whereas the i7-6800K has none. Production status also differs: the i7-6800K is end-of-life, while the i5-10600 is listed as active. The release dates are over four years apart: the i7-6800K launched on 2016-05-30, and the i5-10600 on 2020-04-29.

The i7-6800K has a launch MSRP of $434; the i5-10600 has no listed launch MSRP. Part numbers are SR2PD for the i7-6800K and SRH37 for the i5-10600. Both are desktop market segment parts, and both use DDR4 memory. The i7-6800K’s generation is listed as "Core i7 (Broadwell-E)", while the i5-10600’s is "Core i5 (Comet Lake)". Neither processor has a v-cache 3D option.

The Verdict

The data is unambiguous: the Intel Core i5-10600 is the faster processor in every benchmark measured. Across all six head-to-head tests, it wins by a consistent margin of approximately 7.3% to 7.4%, whether the workload is single-threaded or multi-threaded. The i5-10600’s higher boost clock of 4.80 GHz, combined with the newer Comet Lake architecture, overcomes the i7-6800K’s advantages in cache size (15 MB vs 12 MB) and memory bandwidth (76.8 GB/s vs 42.7 GB/s).

The i7-6800K is not without its merits, but those merits are platform-level rather than compute-level. It offers quad-channel memory, 28 PCIe lanes, and an unlocked multiplier, making it a more flexible foundation for a workstation with high expansion needs. Its 140-watt TDP and end-of-life status, however, make it a less attractive choice for new builds, especially given that the i5-10600 achieves better performance at a fraction of the power draw (65 watts).

For users who prioritize raw CPU performance in applications like Cinebench, the i5-10600 is the clear winner. Its integrated graphics provide a fallback display option, and its active production status means it is still available. The i7-6800K’s only logical advantage is for someone who already owns a Socket 2011-3 motherboard and needs the extra PCIe lanes or quad-channel memory bandwidth for non-CPU workloads, such as heavy data streaming or multiple GPUs.

Benchmark results indicate that the i5-10600 is the superior choice for general compute tasks, with no scenario in the head-to-head tests where the i7-6800K pulls ahead. The i7-6800K’s average benchmark score of 2838 is statistically tied with the i5-10600’s 2837, but this is misleading; the i5-10600 wins every direct comparison, and the i7-6800K’s average is buoyed by additional Geekbench entries. In sum, the i5-10600 delivers better performance per watt, per clock, and per test, making it the recommended processor for anyone choosing between these two based on the data alone.