Intel Core i7-6850K vs Intel Xeon E-2136 Comparison

Where Each One Wins

The benchmark data paints an unambiguous picture: the Intel Xeon E-2136 wins every single recorded test in the head-to-head comparison. Six benchmarks, six wins for the Xeon part. The Core i7-6850K does not claim a single victory in either single-core or multi-core workloads across Cinebench R15, R20, or R23.

This is not a case of one chip dominating in threaded applications while the other excels in lightly threaded tasks. The Xeon E-2136 leads in both categories. Its single-core advantage is consistent, and its multi-core advantage is equally consistent. The data shows a uniform performance gap that does not narrow or widen depending on workload type.

The Core i7-6850K does retain relevance in certain platform-level capabilities. It offers quad-channel memory support with a recorded memory bandwidth of 76.8 GB/s, compared to the Xeon's dual-channel configuration with 42.7 GB/s. The i7 also provides 40 PCIe Gen 3 lanes from the CPU, while the Xeon supplies 16. These are structural advantages, not benchmark wins, but they matter for specific use cases involving memory-intensive or I/O-heavy workloads.

For raw compute throughput, however, the database records show no scenario where the i7-6850K pulls ahead. The Xeon E-2136 wins the multi-core tests by a margin of 12.4% in every Cinebench version, and the single-core tests show a similar gap of 12.2% to 12.4%.

Architecture Differences

The two processors come from different Intel architectures and are built for different market segments. The Core i7-6850K uses the Broadwell-E architecture, specifically the Broadwell-E codename, and belongs to the Core i7 (Broadwell-E) generation. It is a desktop part released in May 2016. The Xeon E-2136 uses the Coffee Lake architecture, specifically Coffee Lake-S WS, and belongs to the Xeon E (Coffee Lake) generation. It is a server/workstation part released in July 2018.

Both are built on the same 14 nm process node from Intel. The transistor counts differ significantly: the i7-6850K integrates 3,400 million transistors on a 246 mm² die, while the Xeon E-2136 has no transistor count recorded in the database but uses a smaller 154 mm² die.

Core and thread counts are identical: 6 cores and 12 threads on both parts. The cache hierarchy differs in the L3 segment. The i7-6850K has 15 MB of shared L3 cache, while the Xeon E-2136 has 12 MB of shared L3 cache. Both use 64 KB of L1 cache per core and 256 KB of L2 cache per core.

The sockets are different. The i7-6850K uses Intel Socket 2011-3, while the Xeon E-2136 uses Intel Socket 1151. The Xeon includes integrated graphics in the form of UHD Graphics P630; the i7-6850K has no integrated graphics recorded. The Xeon supports ECC memory, while the i7 does not. The i7 has an unlocked multiplier, while the Xeon does not.

Head-to-Head Benchmarks

The recorded benchmark data shows the Xeon E-2136 ahead in every test, with remarkably consistent margins. In Cinebench R15 multi-core, the Xeon scores 1112 against the i7-6850K's 974, a delta of 12.4% in favor of the Xeon. In Cinebench R15 single-core, the Xeon scores 156 against 137, a delta of 12.2%.

The pattern repeats in Cinebench R20. Multi-core shows the Xeon at 4636 versus the i7 at 4062, again a 12.4% margin. Single-core shows the Xeon at 654 versus 573, again a 12.4% margin.

Cinebench R23 continues the trend. Multi-core: Xeon 11040, i7 9672, delta 12.4%. Single-core: Xeon 1558, i7 1365, delta 12.4%.

The consistency of the delta is notable. Across five of the six tests, the margin is exactly 12.4%. The only exception is Cinebench R15 single-core, where the margin is 12.2%. This uniformity suggests a fundamental clock-speed advantage rather than a workload-specific architectural edge.

The average benchmark score in the database puts the Xeon E-2136 at 3193, which is 3.7% higher than the i7-6850K's 3079. The percentile rankings are close: the Xeon sits at the 53rd percentile of all CPUs, while the i7 sits at the 52nd percentile.

Specification Differences

The two processors differ across several key specification fields:

• Base clock: The i7-6850K runs at 3.60 GHz, while the Xeon E-2136 runs at 3.30 GHz. The i7 has a higher base clock.
• Boost clock: The Xeon E-2136 boosts to 4.50 GHz, while the i7-6850K boosts to 3.80 GHz. The Xeon has a substantially higher boost clock.
• TDP: The i7-6850K is rated at 140 W, while the Xeon E-2136 is rated at 80 W. The Xeon draws significantly less power.
• Socket: The i7 uses Intel Socket 2011-3; the Xeon uses Intel Socket 1151.
• Memory bus: The i7 supports quad-channel memory; the Xeon supports dual-channel memory.
• Memory bandwidth: The i7 has 76.8 GB/s of memory bandwidth; the Xeon has 42.7 GB/s.
• ECC support: The i7 does not support ECC memory; the Xeon does.
• PCIe lanes: The i7 provides 40 Gen 3 lanes from the CPU; the Xeon provides 16 Gen 3 lanes.
• Integrated graphics: The i7 has none; the Xeon includes UHD Graphics P630.
• L3 cache: The i7 has 15 MB shared; the Xeon has 12 MB shared.
• Multiplier: The i7 is unlocked; the Xeon is locked.
• Market segment: The i7 is a desktop part; the Xeon is a server/workstation part.
• Release date: The i7 launched in May 2016; the Xeon launched in July 2018.
• Part number: The i7 is SR2PC; the Xeon is SR3WW.

FAQ

Q: Which processor has the higher boost clock?

A: The Intel Xeon E-2136 has a boost clock of 4.50 GHz, compared to 3.80 GHz for the Intel Core i7-6850K.

Q: Does either processor support ECC memory?

A: The Intel Xeon E-2136 supports ECC memory. The Intel Core i7-6850K does not.

Q: How much larger is the L3 cache on the i7-6850K?

A: The i7-6850K has 15 MB of shared L3 cache, while the Xeon E-2136 has 12 MB of shared L3 cache.

Q: Which processor has more PCIe lanes?

A: The Intel Core i7-6850K provides 40 Gen 3 lanes from the CPU, while the Intel Xeon E-2136 provides 16 Gen 3 lanes.

Q: What is the average benchmark score difference between the two?

A: The Xeon E-2136 has an average benchmark score of 3193, while the i7-6850K has an average of 3079, a difference of 114 points in favor of the Xeon.

Q: Are both processors built on the same manufacturing process?

A: Yes, both are built on a 14 nm process node from Intel.

The Verdict

The data directs a clear conclusion: the Intel Xeon E-2136 is the faster processor in every benchmark recorded. It wins all six head-to-head tests with a consistent 12.4% margin in multi-core and single-core workloads. Its higher boost clock of 4.50 GHz versus 3.80 GHz appears to be the decisive factor, as the i7-6850K actually has a higher base clock of 3.60 GHz versus 3.30 GHz.

The i7-6850K is not without its strengths. It offers quad-channel memory with 76.8 GB/s of bandwidth, double the Xeon's 42.7 GB/s. It provides 40 PCIe lanes versus 16. It has a larger L3 cache at 15 MB versus 12 MB. It also has an unlocked multiplier for overclocking, which the Xeon lacks. These features make it suitable for systems that need extensive memory bandwidth or many PCIe devices.

The Xeon E-2136 counters with ECC memory support, integrated graphics, a much lower TDP of 80 W versus 140 W, and a newer architecture in Coffee Lake. It also comes from the server/workstation segment, which typically emphasizes reliability features.

For users who prioritize raw compute performance in Cinebench-style workloads, the Xeon E-2136 is the choice. Its 12.4% lead across all multi-core tests is substantial and consistent. For users who require quad-channel memory bandwidth, 40 PCIe lanes, or an unlocked multiplier, the i7-6850K offers platform capabilities that the Xeon cannot match. The database shows a trade-off: the Xeon wins on compute, the i7 wins on platform expansion and memory throughput. The right pick depends entirely on which of those factors matters more for the intended workload.