Intel Core i7-6850K vs Intel Xeon W-2133 Comparison

The Intel Xeon W-2133 and Intel Core i7-6850K are both six-core, twelve-thread processors from Intel’s end-of-life lineup, but they target different segments: the Xeon is a server/workstation part, while the i7 is a desktop enthusiast chip. Benchmark data is unambiguous: the Xeon W-2133 wins every head-to-head Cinebench test, with margins ranging from 10.2% to 10.4%. Its average benchmark score of 3087 sits 0.3% above the i7-6850K’s 3079, and both land at the 52nd percentile among all CPUs. For anyone choosing between these two using only performance data, the Xeon W-2133 is the clear pick. The i7-6850K’s only advantages are its unlocked multiplier for overclocking and a larger 15 MB shared L3 cache, but neither translates into a benchmark victory in the supplied results. The verdict is simple: if you want the faster stock processor, take the Xeon; if you want overclocking headroom and a bigger cache, take the i7 and accept lower stock scores.

The Verdict

The Xeon W-2133 is the faster processor in every measured benchmark. In Cinebench R15 multi-core, it scores 1075 against the i7-6850K’s 974, a 10.4% advantage. That gap holds across the entire test suite: R20 multi-core shows 4483 vs 4062 (10.4%), and R23 multi-core shows 10676 vs 9672 (10.4%). Single-core results follow the same pattern, with the Xeon leading by 10.2% in R15 (151 vs 137), 10.3% in R20 (632 vs 573), and 10.4% in R23 (1507 vs 1365). There are zero benchmark wins for the i7-6850K across the six head-to-head tests.

However, the i7-6850K is not without merit. It has an unlocked multiplier, meaning it can be overclocked, while the Xeon W-2133 is locked. The i7 also carries 15 MB of shared L3 cache versus 8.25 MB on the Xeon. For a builder who prioritizes stock performance, the Xeon W-2133 is the only logical choice. For an enthusiast who plans to overclock and values cache capacity, the i7-6850K offers a different path—but the data shows no stock-clock scenario where it wins. The Xeon also supports ECC memory, a feature absent on the i7, making it the pick for workstation reliability. The i7 is a desktop part with 40 PCIe Gen 3 lanes; the Xeon has 48 lanes. If you need more PCIe connectivity or ECC, the Xeon is mandatory. If you need overclocking, the i7 is mandatory. Otherwise, the Xeon wins on raw numbers.

FAQ

Q: Which processor is faster in multi-core workloads?

A: The Xeon W-2133 wins all three multi-core Cinebench tests. It scores 1075 in R15, 4483 in R20, and 10676 in R23, versus the i7-6850K’s 974, 4062, and 9672 respectively. That is a 10.4% lead in each case.

Q: Does the i7-6850K win any benchmark?

A: No. In the six head-to-head Cinebench tests provided, the Xeon W-2133 wins all of them. The i7-6850K’s only listed advantages are structural: an unlocked multiplier and a larger 15 MB L3 cache.

Q: Can the Xeon W-2133 be overclocked?

A: No. The multiplier is locked (multiplierUnlocked: false). The i7-6850K has an unlocked multiplier (multiplierUnlocked: true), which allows manual overclocking.

Q: Which processor supports ECC memory?

A: Only the Xeon W-2133 supports ECC memory (eccMemory: true). The i7-6850K does not (eccMemory: false). This makes the Xeon the only option for error-correcting memory in a workstation build.

Q: What is the average benchmark score difference?

A: The Xeon W-2133 has an average benchmark score of 3087, while the i7-6850K scores 3079. That is a 0.3% difference, with the Xeon ahead. The nearest rival, the Intel Xeon E5-1660 v3, sits at 3082, between the two.

Q: Are they the same price?

A: Both processors had a launch MSRP of $617. This is the only price information available and it is identical for both.

Q: Which has more PCIe lanes?

A: The Xeon W-2133 provides 48 PCIe Gen 3 lanes (CPU only), while the i7-6850K provides 40 PCIe Gen 3 lanes (CPU only). The Xeon offers 20% more lanes.

Architecture Differences

The two CPUs come from different microarchitectures. The Xeon W-2133 is based on Skylake, specifically the Skylake-W codename, fabricated on Intel’s 14 nm process with a die size of 484 mm². The i7-6850K is based on Broadwell, codename Broadwell-E, also on 14 nm, but with a much smaller die at 246 mm² and 3,400 million transistors. The Xeon’s die is nearly double the size, which likely accounts for its larger memory bandwidth and higher PCIe lane count.

Cache architecture differs significantly. The Xeon has 64 KB of L1 per core, 1 MB of L2 per core, and 8.25 MB of shared L3. The i7 has the same 64 KB L1 per core, but only 256 KB of L2 per core, and a larger 15 MB shared L3. The i7’s L3 cache is 82% larger, which can help in cache-sensitive workloads, but the benchmark data shows the Xeon’s higher clocks and Skylake improvements more than compensate.

Memory support also diverges. Both support DDR4 and use a quad-channel memory bus. However, the Xeon W-2133 has a memory bandwidth of 85.3 GB/s, while the i7-6850K is rated at 76.8 GB/s. That is an 11% bandwidth advantage for the Xeon. ECC memory is supported only on the Xeon, which is a critical feature for error-sensitive workstation tasks.

The socket is a major architectural split: the Xeon uses Intel Socket 2066, while the i7 uses Intel Socket 2011-3. This means they are not interchangeable in motherboards. The Xeon’s 48 PCIe Gen 3 lanes versus the i7’s 40 lanes further differentiates their platform capabilities. Finally, the Xeon targets the server/workstation market segment, while the i7 is a desktop part. The i7’s unlocked multiplier is a desktop enthusiast feature, absent on the locked Xeon.

Specification Differences

The core and thread counts are identical: both have 6 cores and 12 threads. The base clock is also identical at 3.60 GHz. The boost clock differs slightly, with the Xeon at 3.90 GHz and the i7 at 3.80 GHz, a 0.10 GHz advantage for the Xeon. TDP is identical at 140 watts for both.

The socket is different: the Xeon uses Socket 2066, the i7 uses Socket 2011-3. The process node is the same (14 nm), but the die size is not (484 mm² vs 246 mm²). The i7 lists 3,400 million transistors; the Xeon does not have a transistor count in the data.

Cache differs as noted: L1 is the same (64 KB per core), but L2 is 1 MB per core on the Xeon versus 256 KB per core on the i7. L3 is 8.25 MB shared on the Xeon versus 15 MB shared on the i7. Memory bandwidth is 85.3 GB/s for the Xeon and 76.8 GB/s for the i7. ECC memory is supported only on the Xeon. PCIe lanes are 48 on the Xeon and 40 on the i7, both Gen 3.

The i7 has an unlocked multiplier; the Xeon does not. The release dates differ: the i7 launched on 2016-05-30, and the Xeon on 2017-08-28. Both are end-of-life products. The launch MSRP is identical at $617. The market segment is the key differentiator: server/workstation for the Xeon, desktop for the i7.

Head-to-Head Benchmarks

The Xeon W-2133 dominates the six Cinebench tests with a consistent margin. In Cinebench R15 multi-core, the Xeon scores 1075 versus 974 for the i7, a 10.4% win. Single-core R15 shows 151 versus 137, a 10.2% win. The R20 tests replicate this pattern: multi-core is 4483 vs 4062 (10.4%), and single-core is 632 vs 573 (10.3%). R23 multi-core is 10676 vs 9672 (10.4%), and single-core is 1507 vs 1365 (10.4%).

The consistency of the 10.4% margin across multi-core tests suggests a clock and efficiency advantage rather than a workload-specific quirk. The Xeon’s boost clock is only 0.10 GHz higher (3.90 vs 3.80), yet it wins by over 10% in every test. This points to architectural improvements in Skylake over Broadwell, possibly better IPC per clock or more efficient cache utilization. The i7’s larger L3 cache (15 MB vs 8.25 MB) does not help it overcome this deficit.

In single-core tests, the Xeon’s lead is slightly smaller in R15 (10.2%) but grows to 10.4% in R20 and R23. The i7’s single-core scores are consistently about 9.4% lower relative to the Xeon across all three versions. The data is clear: the Xeon is faster in both lightly-threaded and heavily-threaded scenarios. The i7-6850K’s only listed benchmarks outside Cinebench are Geekbench results: 6629 multi-core and 1217 single-core. The Xeon W-2133 has no Geekbench scores in the data, so a direct comparison there is not possible.

Where Each One Wins

The Xeon W-2133 wins in every benchmark category where both are tested: multi-core and single-core Cinebench R15, R20, and R23. Its wins are all in the 10.2% to 10.4% range, making it the unequivocal performance leader in stock configurations. It also wins on platform features: ECC memory support, 48 PCIe Gen 3 lanes, and higher memory bandwidth (85.3 GB/s vs 76.8 GB/s). For workstation tasks like rendering, simulation, or any memory-intensive workload requiring ECC, the Xeon is the only viable option.

The i7-6850K wins in two unbenchmarked areas: overclocking and cache capacity. Its unlocked multiplier allows users to push clocks beyond stock, potentially closing or exceeding the Xeon’s lead in a scenario not covered by the provided data. Its 15 MB shared L3 cache is nearly double the Xeon’s 8.25 MB, which could benefit workloads with large working sets that fit in cache—though the benchmark results do not reflect this advantage. It also has a smaller die (246 mm² vs 484 mm²), which may imply lower production cost, but price data shows identical launch MSRPs.

For a builder who will not overclock and needs reliability features, the Xeon W-2133 is the correct choice. For a builder who wants to overclock and values cache size, the i7-6850K offers that flexibility, but it comes with a 10% stock performance deficit. The Xeon’s higher PCIe lane count also supports more expansion cards, making it the better base for a multi-GPU or high-speed storage workstation. The i7’s desktop market segment and unlocked multiplier suggest it is meant for enthusiasts, but the data shows it cannot match the Xeon without manual tuning.