Intel Core i7-5930K vs Intel Xeon E5-4627 v3 Comparison

The Intel Xeon E5-4627 v3 and the Intel Core i7-5930K are both Haswell-era processors built for the Intel Socket 2011-3 platform, but they target entirely different corners of the market. The Xeon is a 10-core server/workstation part with ECC memory support, while the Core i7 is a 6-core desktop chip with an unlocked multiplier. Despite sharing the same 22 nm process node and 356 mm² die size, their benchmark results reveal a surprisingly consistent performance gap, with the Xeon winning every head-to-head Cinebench test by roughly 9.6-9.7%. This analysis explores what the data shows about these two end-of-life processors.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Xeon E5-4627 v3 has 10 cores and 20 threads, while the Intel Core i7-5930K has 6 cores and 12 threads. This core advantage is the primary driver of the Xeon's multi-core benchmark wins.

Q: How do the two chips compare in single-core Cinebench R23 performance?

A: The Xeon E5-4627 v3 scores 1361 in Cinebench R23 single-core, which is 9.7% higher than the Core i7-5930K's score of 1241. The Xeon also wins the single-core R15 and R20 tests by 9.6% margins.

Q: What is the average benchmark score for each processor?

A: The Xeon E5-4627 v3 has an average benchmark score of 2789, while the Core i7-5930K averages 2775. The Xeon is 0.5% ahead of the Core i7 in this aggregate metric, placing both at the 51st percentile of all CPUs.

Q: Do both processors support ECC memory?

A: No. The Xeon E5-4627 v3 supports ECC memory, while the Core i7-5930K does not. Both support DDR4 memory with a quad-channel memory bus and 68.3 GB/s bandwidth.

Q: Which processor has a larger L3 cache?

A: The Xeon E5-4627 v3 has 25 MB of shared L3 cache, compared to 15 MB on the Core i7-5930K. Both have 64 KB L1 and 256 KB L2 cache per core.

Q: Are both processors unlocked for overclocking?

A: No. The Core i7-5930K has an unlocked multiplier, while the Xeon E5-4627 v3 is locked. This makes the Core i7 the more flexible option for enthusiasts, though the benchmark data does not reflect overclocked results.

Architecture Differences

Both processors are built on Intel's 22 nm Haswell architecture, with the Xeon using the Haswell-EP codename and the Core i7 using Haswell-E. They share the same foundry (Intel), transistor count (2,600 million), and die size (356 mm²). The key architectural difference lies in their core configurations: the Xeon packs 10 cores with 20 threads, while the Core i7 has 6 cores with 12 threads. This core count disparity directly influences the L3 cache, as the Xeon has 25 MB shared L3 cache versus 15 MB on the Core i7.

The memory subsystems are identical in bus width and bandwidth, both supporting DDR4 with quad-channel memory and 68.3 GB/s peak bandwidth. However, the Xeon adds ECC memory support, which is absent on the Core i7. Both processors offer PCIe Gen 3 with 40 lanes (CPU only), and neither has integrated graphics. The Xeon is classified for the Server/Workstation market segment, while the Core i7 is a Desktop part. The Xeon launched on 2015-05-31, roughly nine months after the Core i7's 2014-08-31 release date.

Head-to-Head Benchmarks

The head-to-head data shows a clean sweep for the Intel Xeon E5-4627 v3 across all six Cinebench tests. In Cinebench R15 multicore, the Xeon scores 971 versus the Core i7's 886, a 9.6% advantage. The single-core R15 test tells the same story: 137 for the Xeon versus 125 for the Core i7, also 9.6% ahead. Moving to Cinebench R20, the Xeon's multicore score of 4049 beats the Core i7's 3692 by 9.7%, while the single-core result is 571 versus 521, a 9.6% gap.

The Cinebench R23 results reinforce this pattern. In multicore, the Xeon scores 9642 compared to 8791 for the Core i7, a 9.7% difference. The single-core R23 test shows 1361 versus 1241, again 9.7% in favor of the Xeon. Notably, the Core i7 has additional Geekbench scores (5715 multicore, 1225 single-core) that are not present in the Xeon's benchmark list, so a direct comparison on that test is not possible from the data. The Xeon wins 6 of 6 head-to-head tests, with the Core i7 winning none.

Specification Differences

The two processors diverge most sharply on core and thread counts. The Xeon E5-4627 v3 offers 10 cores and 20 threads, while the Core i7-5930K has 6 cores and 12 threads. Base and boost clocks also differ, with the Core i7 running at 3.50 GHz base and 3.70 GHz boost, while the Xeon runs at 2.60 GHz base and 3.20 GHz boost. Despite the lower clocks, the Xeon's extra cores deliver superior multi-threaded performance in benchmarks.

The L3 cache differs significantly: 25 MB on the Xeon versus 15 MB on the Core i7. ECC memory support is exclusive to the Xeon. The TDP is slightly higher on the Core i7 at 140 W, versus 135 W on the Xeon. The market segments differ (Server/Workstation versus Desktop), as does the launch MSRP — the Xeon launched at $2225, while the Core i7 has no listed launch MSRP in the data. The multiplier is unlocked on the Core i7 but locked on the Xeon. Part numbers are SR22Q for the Xeon and SR20R for the Core i7. Both share the same socket, architecture, process node, foundry, transistor count, die size, memory support, memory bus, memory bandwidth, PCIe configuration, and production status (end-of-life).

The Verdict

The benchmark data is unambiguous: the Intel Xeon E5-4627 v3 outperforms the Intel Core i7-5930K in every measured Cinebench test, with a consistent 9.6-9.7% lead across single-core and multi-core workloads. This is notable because the Xeon achieves this despite lower base and boost clocks, meaning its 10-core configuration more than compensates for the clock speed deficit against the 6-core Core i7. The Xeon also offers ECC memory support and a larger L3 cache, making it the more robust choice for server and workstation environments.

However, the Core i7-5930K is not without its merits. It has an unlocked multiplier, which opens the door to overclocking that the locked Xeon cannot match — though the data does not include any overclocked results. The Core i7 also has a lower launch price point (no MSRP listed versus the Xeon's $2225 launch MSRP), making it the more accessible option for desktop builders. For users who prioritize single-threaded responsiveness and have the ability to overclock, the Core i7 could close the gap, but as shipped, the Xeon is the faster processor in all tested scenarios.

Where Each One Wins

The Intel Xeon E5-4627 v3 wins in every measured benchmark category. Its 9.6% advantage in Cinebench R15 single-core (137 versus 125) and 9.7% edge in R23 single-core (1361 versus 1241) show that even in lightly-threaded tasks, the Xeon's architecture delivers higher performance per clock in these tests. Multi-core workloads see the same margin: 9.6% in R15 (971 versus 886) and 9.7% in R23 (9642 versus 8791). The Xeon's 10 cores and 20 threads, combined with 25 MB of L3 cache, make it the clear choice for heavily parallel workloads like rendering, scientific computing, and server-side virtualization, especially where ECC memory is required.

The Intel Core i7-5930K does not win any head-to-head benchmark, but its strengths lie outside the measured tests. Its unlocked multiplier is a key differentiator, allowing enthusiasts to push clock speeds beyond the stock 3.50 GHz base and 3.70 GHz boost. For users who prefer a desktop-oriented platform with overclocking headroom, the Core i7 offers a path to potentially exceed the Xeon's performance — though the data does not quantify that potential. The Core i7 also benefits from a lower TDP (140 W versus 135 W is actually slightly higher, but its 6-core design may be easier to cool in practice) and a more consumer-friendly market segment. In the Geekbench tests that only the Core i7 has data for, it scores 5715 multicore and 1225 single-core, but without a Xeon comparison, these numbers are context-free. The Core i7 is the better pick for a desktop enthusiast who wants overclocking flexibility, while the Xeon is the superior choice for validated, out-of-the-box performance in server and workstation tasks.