Intel Core i7-6700K vs Intel Xeon Gold 6342 Comparison

The Intel Core i7-6700K and the Intel Xeon Gold 6342 represent two very different corners of the Intel lineup. The i7-6700K is a legacy desktop part from the Skylake generation, while the Xeon Gold 6342 is a modern server processor built on Ice Lake-SP. The benchmark data in the database paints a stark picture of generational and architectural divide. Across every recorded test, the Xeon Gold 6342 delivers a commanding performance advantage, but the specific nature of that advantage reveals a lot about what each chip is designed to do.

Head-to-Head Benchmarks

The database records six head-to-head comparisons, and the Xeon Gold 6342 wins all six. The margin is consistent and enormous. In Cinebench R15 multi-core, the Xeon scores 4033 against the i7-6700K's 765, a delta of 81% in favor of the Xeon. The single-core R15 test shows the same 81% delta, with the Xeon at 569 and the i7 at 108. This pattern repeats across the entire Cinebench suite. In R20 multi-core, the Xeon posts 16805 versus 3189 for the i7. In R20 single-core, the Xeon hits 2372 while the i7 manages 450. The R23 results continue the trend: the Xeon scores 40014 in multi-core against 7594 for the i7, and 5649 in single-core versus 1072.

The consistent 81% delta across both single-threaded and multi-threaded tests is striking. It indicates that the Xeon's advantage is not merely a matter of having more cores, though that is a major factor. Even in purely single-core workloads, the Xeon Gold 6342 is dramatically faster. The data shows a processor that is simply newer and more powerful on every front. The i7-6700K, despite being a strong desktop part in its era, is completely outclassed here. The average benchmark score for the i7 is 12237, while the Xeon's average is 11574. Interestingly, the i7 has a slightly higher average score, but this is due to the different mix of benchmarks available for each chip, not because the i7 is faster in any direct comparison. The head-to-head data is unambiguous: the Xeon Gold 6342 wins every recorded contest by a wide margin.

Architecture Differences

The underlying architectures explain the performance gap. The i7-6700K is built on Intel's 14 nm process and uses the Skylake architecture. It has 4 cores and 8 threads, with a base clock of 4.00 GHz and a boost clock of 4.20 GHz. Its cache configuration includes 64 KB of L1 per core, 256 KB of L2 per core, and 8 MB of shared L3 cache. The Xeon Gold 6342, in contrast, is a 10 nm Ice Lake-SP part. It packs 24 cores and 48 threads, with a base clock of 2.80 GHz and a boost clock of 3.50 GHz. Its cache is substantially larger: 64 KB of L1 per core, 1 MB of L2 per core, and a shared 36 MB of L3 cache.

The memory subsystems are also fundamentally different. The i7-6700K supports DDR3 or DDR4 depending on the motherboard, using a dual-channel memory bus with a bandwidth of 34.1 GB/s. The Xeon Gold 6342 supports DDR4 exclusively, but uses an eight-channel memory bus with a bandwidth of 204.8 GB/s. This sixfold increase in memory bandwidth is critical for server workloads that stream large datasets. The Xeon also supports ECC memory, which the i7 does not. The PCIe capabilities differ as well: the i7 provides Gen 3 with 16 lanes from the CPU, while the Xeon provides Gen 4 with 64 lanes. The i7 includes integrated HD Graphics 530, while the Xeon has no integrated graphics. The Xeon is a server part with a 230 W TDP, compared to the i7's 91 W TDP. The i7 has an unlocked multiplier, while the Xeon is locked. The i7 is end-of-life and targets the desktop market, while the Xeon is active and targets server and workstation use.

The Verdict

The data is clear for any workload that can leverage the Xeon's resources. The Xeon Gold 6342 is the overwhelmingly faster processor in every benchmark recorded. Its 24 cores and 48 threads provide a massive multi-threaded advantage, and its newer architecture ensures it also wins in single-threaded tasks. The i7-6700K offers no performance advantage in any recorded test. The only areas where the i7 might be considered preferable are qualitative: it has an unlocked multiplier for overclocking, integrated graphics, and a much lower TDP of 91 W versus 230 W. However, these are not performance metrics. For raw compute, the Xeon Gold 6342 is the only choice based on the data.

FAQ

Q: How much faster is the Xeon Gold 6342 in multi-core Cinebench R23?

A: The Xeon Gold 6342 scores 40014, while the Intel Core i7-6700K scores 7594. This represents an 81% delta in favor of the Xeon.

Q: Does the i7-6700K win any benchmark against the Xeon Gold 6342?

A: No. In the six head-to-head benchmarks recorded, the Xeon Gold 6342 wins all six. The i7-6700K records zero wins.

Q: What is the difference in core count between the two processors?

A: The Intel Core i7-6700K has 4 cores and 8 threads, while the Intel Xeon Gold 6342 has 24 cores and 48 threads.

Q: Which processor supports ECC memory?

A: The Intel Xeon Gold 6342 supports ECC memory. The Intel Core i7-6700K does not.

Q: What is the memory bandwidth of each processor?

A: The Intel Core i7-6700K has a dual-channel memory bus with 34.1 GB/s bandwidth. The Intel Xeon Gold 6342 has an eight-channel memory bus with 204.8 GB/s bandwidth.

Q: Are the single-core results also in favor of the Xeon?

A: Yes. In Cinebench R23 single-core, the Xeon Gold 6342 scores 5649 against the i7-6700K's 1072, an 81% delta.

Where Each One Wins

The Xeon Gold 6342 wins every recorded benchmark category. Its strongest showing is in multi-threaded workloads, where its 24 cores and 48 threads deliver scores like 40014 in Cinebench R23 multi-core. It also wins in single-threaded tests, such as 5649 in Cinebench R23 single-core, which is a notable achievement given its lower clock speeds. The Xeon's 36 MB of L3 cache and 204.8 GB/s memory bandwidth further support heavy compute and data-intensive tasks. The i7-6700K, with its 4 cores and 8 threads, is suited for light, single-threaded desktop tasks, but it loses to the Xeon in every measured metric. The i7's integrated graphics and lower TDP make it a more practical choice for a basic desktop system, but not for performance.

Specification Differences

The two processors differ in nearly every specification. The i7-6700K uses the Skylake architecture on a 14 nm process, while the Xeon Gold 6342 uses Ice Lake-SP on a 10 nm process. The i7 has 4 cores and 8 threads, whereas the Xeon has 24 cores and 48 threads. Base clocks are 4.00 GHz for the i7 and 2.80 GHz for the Xeon; boost clocks are 4.20 GHz and 3.50 GHz respectively. The TDP is 91 W for the i7 and 230 W for the Xeon. The i7 uses Intel Socket 1151, while the Xeon uses Intel Socket 4189. Cache differs: the i7 has 256 KB L2 per core and 8 MB shared L3, while the Xeon has 1 MB L2 per core and 36 MB shared L3. The memory bus is dual-channel for the i7 and eight-channel for the Xeon. Memory bandwidth is 34.1 GB/s versus 204.8 GB/s. The i7 supports DDR3 and DDR4, while the Xeon supports DDR4 only. ECC memory is not supported on the i7 but is on the Xeon. The i7 has PCIe Gen 3 with 16 lanes, while the Xeon has PCIe Gen 4 with 64 lanes. The i7 includes HD Graphics 530, while the Xeon has no integrated graphics. The i7's multiplier is unlocked, while the Xeon's is locked. The i7 is end-of-life and desktop-focused, while the Xeon is active and server-focused. The i7 has a launch MSRP of $339, while the Xeon has no recorded launch MSRP. The i7 was released in 2015, and the Xeon was released in 2021.