Intel Core i5-6600K vs Intel Core i5-7600 Comparison

The Verdict

The Intel Core i5-7600 takes the majority of the benchmark wins in this comparison, securing 6 out of 8 head-to-head tests. Its advantages are concentrated in the Cinebench suite, where it leads the Intel Core i5-6600K by margins between 3.9% and 4.4% across all render workloads, both single-core and multi-core. The data indicates the i5-7600 is the stronger choice for tasks that rely on raw CPU rendering performance, such as 3D modeling, video encoding, and other multi-threaded productivity workloads.

However, the Intel Core i5-6600K is not without its own territory. It wins both Geekbench tests, with a 3.9% lead in multi-core and a 1.4% lead in single-core. For users whose primary applications are sensitive to Geekbench-style integer and floating-point operations, the older Skylake part remains competitive. The overall average benchmark score also tells a nuanced story: the i5-7600 averages 1844 points, while the i5-6600K averages 1816 points, a difference of roughly 1.5%. Both CPUs sit at the 42nd percentile among all processors in the database, meaning they deliver nearly identical overall performance tiers.

The choice depends on the workload. The i5-7600 is the pick for Cinebench-heavy workflows and for users who want the newer architecture with a lower thermal envelope. The i5-6600K is the pick for Geekbench-oriented tasks and for enthusiasts who value the unlocked multiplier, which allows manual overclocking beyond the stock boost clock. The i5-6600K also remains in production status as end-of-life, while the i5-7600 is listed as active, a factor worth considering for long-term availability.

Architecture Differences

The two processors share the same fundamental blueprint: both are quad-core, quad-thread desktop parts built on Intel's 14 nm process. The i5-7600 uses the Kaby Lake architecture, while the i5-6600K uses Skylake. Both feature identical cache hierarchies, with 64 KB of L1 per core, 256 KB of L2 per core, and 6 MB of shared L3 cache. Neither supports ECC memory, and both provide PCI Express Gen 3 with 16 CPU lanes.

The key architectural divergence lies in clock speeds and memory support. The i5-7600 has a base clock of 3.50 GHz and a boost clock of 4.10 GHz, while the i5-6600K runs at the same 3.50 GHz base but boosts to 3.90 GHz. That 200 MHz boost advantage for the Kaby Lake part explains much of its Cinebench lead. The i5-6600K compensates with an unlocked multiplier, meaning users can manually raise clock speeds beyond stock, a feature the locked i5-7600 lacks.

Memory support differs as well. The i5-7600 supports only DDR4 memory with dual-channel access and a peak bandwidth of 38.4 GB/s. The i5-6600K supports both DDR3 and DDR4, also dual-channel, but its DDR4 bandwidth is rated at 34.1 GB/s, which is lower than the i5-7600's specification. This bandwidth difference could influence memory-sensitive workloads, though the benchmark data does not isolate that variable.

The integrated graphics also differ. The i5-7600 carries the HD 630 GPU, while the i5-6600K has the HD Graphics 530. Both are capable integrated solutions, but the newer HD 630 is a generation ahead. Thermal design power is another differentiator: the i5-7600 is rated at 65 W, while the i5-6600K draws 91 W. This makes the i5-7600 substantially more power-efficient on paper, likely running cooler and quieter in comparable cooling setups.

Socket compatibility is shared, with both parts using Intel Socket 1151. The i5-7600 was released on 2017-01-02, while the i5-6600K launched earlier on 2015-08-04. The i5-7600 is still marked as active in production, while the i5-6600K is end-of-life. The i5-6600K has a launch MSRP of $242, but no launch price is recorded for the i5-7600 in the database.

Where Each One Wins

The Cinebench suite is the i5-7600's domain. Across all six Cinebench R15, R20, and R23 tests, it maintains a consistent lead of roughly 4%. In multi-core tests, the i5-7600 scores 563 in R15 versus 540 for the i5-6600K, 2348 versus 2252 in R20, and 5591 versus 5363 in R23. These results translate to a 4.3% advantage in every multi-core test. The single-core Cinebench results are almost as consistent, with the i5-7600 leading by 3.9% in R15, 4.4% in R20, and 4.2% in R23. This suggests the i5-7600's higher boost clock delivers tangible gains in both lightly-threaded and fully-threaded render workloads.

The Geekbench tests flip the script. The i5-6600K scores 3856 in Geekbench multi-core versus 3704 for the i5-7600, a 3.9% advantage. In single-core Geekbench, the i5-6600K scores 1363 versus 1344, a smaller 1.4% lead. This is an unusual split: the newer architecture wins Cinebench while the older architecture wins Geekbench. The data suggests that Geekbench's workload mix favors the i5-6600K's memory flexibility or other microarchitectural characteristics not captured by clock speed alone.

For real-world use cases, the database points to a clear split. Users running Cinebench-based render tasks, such as 3D artists or video editors using Cinema 4D, should prefer the i5-7600. Users running Geekbench-heavy general productivity suites, such as office applications, web browsing, or software compilation, might see better results with the i5-6600K. The i5-6600K also offers the unlocked multiplier, which means overclockers can potentially close or exceed the i5-7600's Cinebench lead, though the database does not include overclocked benchmark data.

FAQ

Q: Which processor has the higher boost clock?

A: The Intel Core i5-7600 boosts to 4.10 GHz, while the Intel Core i5-6600K boosts to 3.90 GHz. Both have a base clock of 3.50 GHz.

Q: Are these CPUs compatible with the same motherboard socket?

A: Yes, both use Intel Socket 1151. However, the i5-7600 supports only DDR4 memory, while the i5-6600K supports both DDR3 and DDR4.

Q: Can I overclock the Intel Core i5-7600?

A: No, the i5-7600 has a locked multiplier. The i5-6600K has an unlocked multiplier, which allows manual overclocking.

Q: Which processor wins in multi-core rendering performance?

A: The i5-7600 wins all three Cinebench multi-core tests. It scores 563 versus 540 in R15, 2348 versus 2252 in R20, and 5591 versus 5363 in R23, a consistent 4.3% advantage.

Q: Which processor has better Geekbench performance?

A: The i5-6600K wins both Geekbench tests. It scores 3856 versus 3704 in multi-core and 1363 versus 1344 in single-core.

Q: What is the thermal design power difference?

A: The i5-7600 is rated at 65 W, while the i5-6600K is rated at 91 W. The i5-7600 is the more power-efficient part.

Head-to-Head Benchmarks

The most decisive victories for the Intel Core i5-7600 occur in the Cinebench R20 single-core test, where it leads by 4.4% with a score of 331 versus 317 for the i5-6600K. This is the largest percentage margin in the entire comparison, and it reflects the i5-7600's higher 4.10 GHz boost clock in a lightly-threaded workload. The Cinebench R15 single-core test shows a 3.9% lead for the i5-7600, scoring 79 versus 76, and the R23 single-core test shows a 4.2% lead, scoring 789 versus 757. These single-core results are notable because they demonstrate that the Kaby Lake part does not sacrifice single-threaded speed for its multi-threaded gains.

The multi-core Cinebench results are equally one-sided. In R15, the i5-7600 scores 563 against 540 for the i5-6600K, a 4.3% delta. In R20, the i5-7600 scores 2348 against 2252, again a 4.3% delta. In R23, the i5-7600 scores 5591 against 5363, also a 4.3% delta. The consistency of these margins across three generations of the Cinebench test suggests a stable architectural advantage rather than a workload-specific anomaly. The i5-7600's higher boost clock and newer memory bandwidth specification likely contribute to this pattern.

The Intel Core i5-6600K's largest win is in Geekbench multi-core, where it scores 3856 versus 3704 for the i5-7600, a 3.9% margin. This is a substantial reversal given the i5-7600's dominance in Cinebench. The Geekbench single-core test shows a narrower 1.4% lead for the i5-6600K, scoring 1363 versus 1344. The database records these as wins for the i5-6600K, and the delta percentages are negative from the i5-7600's perspective, confirming the older part's strength in this benchmark suite.

Examining the nearest rivals provides additional context. The i5-7600's average score of 1844 places it just 0.1% ahead of the Intel Core i7-8706G, 0.5% ahead of the AMD Athlon Gold PRO 3150G, and 0.7% ahead of both the AMD Ryzen 5 4600U and the Intel Core i5-8305G. The i5-6600K's average score of 1816 sits 0.1% behind the Intel Xeon E3-1505M v5, 0.4% behind the Intel Xeon E5-1630 v3, and 0.3% to 0.4% ahead of the AMD Ryzen 5 PRO 4650U and Intel Core i3-9320 respectively. Both processors occupy the same performance tier in the database, with the i5-7600 holding a slight overall edge of 28 points in average score.

The head-to-head record is decisive: the i5-7600 wins 6 tests, the i5-6600K wins 2. But the two Geekbench wins for the i5-6600K are not trivial, especially the multi-core result with a 152-point gap. For users prioritizing Geekbench scores, the i5-6600K remains a viable option despite being an older architecture. For users prioritizing Cinebench, the i5-7600 is the clear choice, with margins that are small in absolute terms but consistent across every render test. The data ultimately describes two quad-core parts with nearly identical overall performance, differentiated primarily by workload-specific strengths and the i5-6600K's overclocking headroom.