Intel Core i5-7600K vs Intel Xeon E3-1245 v5 Comparison

The Intel Core i5-7600K and Intel Xeon E3-1245 v5 are both 14 nm Intel Socket 1151 processors, but they target very different corners of the market. The i5-7600K is a Kaby Lake desktop chip with an unlocked multiplier, while the Xeon E3-1245 v5 is a locked Skylake-DT server/workstation part with ECC memory support. Benchmark data shows a clear overall winner, but the details matter for specific workloads.

Head-to-Head Benchmarks

The Xeon E3-1245 v5 sweeps every single benchmark in this comparison, and it does so by a consistent margin. In Cinebench R15 multicore, the Xeon scores 687 against the i5-7600K’s 583, a delta of -15.1% from the i5’s perspective. The single-core R15 result follows the same pattern: 96 for the Xeon versus 82 for the i5, a -14.6% gap. This is not a case where one chip wins on multicore and the other on single-core; the Xeon leads in both disciplines.

Moving to Cinebench R20, the deltas tighten to an identical -15.1% in both multicore and single-core tests. The Xeon posts 2865 multicore and 404 single-core, while the i5-7600K manages 2432 and 343, respectively. The R23 results confirm the trend with a -15.1% multicore delta (6822 vs 5792) and a -15.2% single-core delta (963 vs 817). Across all six head-to-head tests, the Xeon wins every one, giving it a 6-0 record in this matchup.

The average benchmark scores tell a similar story. The i5-7600K averages 1976 across its benchmark set, while the Xeon E3-1245 v5 averages 1973. That is a 0.2% difference in favor of the i5, but this average includes Geekbench results for the i5 that have no direct Xeon counterpart in the head-to-head table. When looking strictly at the shared Cinebench tests, the Xeon is consistently about 15% faster. The nearest rival data reinforces the closeness of these two chips overall, with the i5’s average score sitting just 0.2% above the Xeon’s, and the Xeon’s own nearest-rival list showing a -0.2% delta against the i5.

Where Each One Wins

The Xeon E3-1245 v5 is the outright performance winner in every measured workload, which makes the use-case split fairly one-sided. Its 8 threads versus the i5-7600K’s 4 threads give it a natural advantage in heavily threaded tasks like Cinebench R23 multicore, where it scores 6822 versus 5792. The 15.1% multicore deficit for the i5 is significant for rendering, video encoding, or any workload that scales across cores.

However, the i5-7600K does have one clear advantage: its unlocked multiplier. The benchmark scores in this data reflect stock performance, but the i5-7600K is designed for overclocking. With a base clock of 3.80 GHz and boost of 4.20 GHz, it already runs at higher clocks than the Xeon’s 3.50 GHz base and 3.90 GHz boost. A user who overclocks the i5 could potentially close the gap in single-core tasks, though the Xeon still holds a 14-15% lead in stock single-core Cinebench runs.

For pure compute throughput without any overclocking, the Xeon is the pick. It also brings ECC memory support, which the i5 lacks, making it suitable for error-sensitive server or workstation environments. The i5-7600K, by contrast, is a desktop gaming-oriented chip with integrated HD 630 graphics, while the Xeon uses HD Graphics P530. Neither integrated GPU is a gaming powerhouse, but the i5’s desktop positioning and unlocked multiplier make it more flexible for enthusiast builds.

Architecture Differences

These two CPUs come from different architectural generations despite sharing the same socket. The i5-7600K is Kaby Lake, built on a 14 nm process, while the Xeon E3-1245 v5 is Skylake-DT, also on 14 nm. Both are Intel foundry parts, but the transistor counts differ: the Xeon has 1,750 million transistors on a 122 mm² die, while the i5’s transistor count and die size are not listed in the data.

The core counts are identical at 4 physical cores, but the threading model diverges. The i5-7600K has 4 threads total, meaning no Hyper-Threading, while the Xeon E3-1245 v5 has 8 threads, enabling simultaneous multithreading. This explains the consistent 15% performance gap in Cinebench tests, despite the i5’s higher clock speeds.

Cache configurations also differ. Both have 64 KB L1 and 256 KB L2 per core, but the L3 cache jumps from 6 MB shared on the i5 to 8 MB shared on the Xeon. Memory support is another split: the i5 supports only DDR4 in dual-channel mode with 38.4 GB/s bandwidth, while the Xeon supports both DDR3 and DDR4, also dual-channel, but with a lower 34.1 GB/s bandwidth. ECC memory is available only on the Xeon.

The production statuses are telling. The i5-7600K is listed as Active, with a release date of January 2017 and part number SR32V. The Xeon E3-1245 v5 is End-of-life, released in October 2015 with part number SR2LL. The Xeon’s launch MSRP was $294, though that figure should not be interpreted as a current price indicator. The i5 has no launch MSRP listed. The Xeon also features a locked multiplier, while the i5 is multiplier-unlocked, and both support PCIe Gen 3 with 16 CPU lanes.

FAQ

Q: Which CPU is faster in multi-threaded workloads?

A: The Intel Xeon E3-1245 v5 wins all multicore Cinebench tests. In Cinebench R23 multicore, it scores 6822 versus the i5-7600K’s 5792, a 15.1% advantage. The Xeon’s 8 threads versus 4 threads drive this result.

Q: Does the i5-7600K win anywhere in the benchmark data?

A: No. The head-to-head table shows the Xeon winning all six tests, including single-core Cinebench R23 (963 vs 817). The i5’s average benchmark score of 1976 is only 0.2% higher than the Xeon’s 1973, but that includes Geekbench results not present for the Xeon.

Q: What memory features differentiate these two CPUs?

A: The Xeon E3-1245 v5 supports both DDR3 and DDR4 with ECC memory, while the i5-7600K supports only DDR4 without ECC. The i5 has a higher memory bandwidth of 38.4 GB/s versus the Xeon’s 34.1 GB/s.

Q: Are both CPUs on the same socket and process node?

A: Yes. Both use Intel Socket 1151 and are built on Intel’s 14 nm process. However, the i5 is Kaby Lake architecture, while the Xeon is Skylake-DT.

Q: Can the i5-7600K be overclocked?

A: Yes, the i5-7600K has an unlocked multiplier, which is a feature the Xeon E3-1245 v5 lacks. The Xeon’s multiplier is locked, so it cannot be overclocked in the same way.

Q: What is the production status of each chip?

A: The i5-7600K is listed as Active with a release date of January 2017. The Xeon E3-1245 v5 is End-of-life, released in October 2015 with a launch MSRP of $294.

The Verdict

The benchmark data leaves little room for ambiguity: the Intel Xeon E3-1245 v5 outperforms the Intel Core i5-7600K in every shared test. The Xeon’s 8 threads and 8 MB L3 cache give it a 15% edge in Cinebench R15, R20, and R23, both multicore and single-core. For anyone running render workloads, compiling code, or using multi-threaded applications, the Xeon is the clear choice based on raw scores.

The i5-7600K’s case rests entirely on its unlocked multiplier and higher stock clocks. With a 3.80 GHz base and 4.20 GHz boost, it starts at a higher frequency than the Xeon’s 3.50 GHz/3.90 GHz, and overclocking could offset some of the Xeon’s threading advantage. It also has higher memory bandwidth at 38.4 GB/s, which could benefit certain memory-sensitive tasks.

For server or workstation use, the Xeon’s ECC memory support and 8 threads make it the data-driven pick, despite its End-of-life status. For a desktop enthusiast who plans to overclock, the i5-7600K’s unlocked multiplier and Active production status offer more longevity and flexibility. The numbers favor the Xeon for pure performance, but the i5’s overclocking headroom is a qualitative factor that benchmark scores alone cannot capture. Both CPUs sit at the 44th percentile of all CPUs, and their average scores are within 0.2% of each other, so the choice hinges on workload and overclocking intent rather than a dominant overall winner.