Intel Core i7-5930K vs Intel Xeon E5-2628L v3 Comparison

The Intel Core i7-5930K and the Intel Xeon E5-2628L v3 are both 22 nm Haswell parts built for the Intel Socket 2011-3 platform, yet they target very different corners of the market. The Core i7-5930K is a desktop enthusiast processor with an unlocked multiplier, while the Xeon E5-2628L v3 is a server and workstation chip with a dramatically lower power envelope. Benchmark results show the Xeon pulling ahead in every recorded test, but that does not tell the whole story. The data in the database reveals two chips with the same transistor count and die size, identical memory and PCIe configurations, but very different core counts, clock speeds, and feature sets. This analysis relies solely on the recorded measurements and specifications.

Architecture Differences

Both processors are built on Intel’s 22 nm process and use the Haswell microarchitecture. The Core i7-5930K carries the codename Haswell-E, while the Xeon E5-2628L v3 is a Haswell-EP part. The manufacturing details are identical: each chip integrates 2,600 million transistors on a 356 mm² die. The foundry is Intel for both. The core configuration is where the architectures diverge. The Core i7 has 6 cores and 12 threads, while the Xeon has 10 cores and 20 threads. That is a substantial difference in parallel throughput capacity, and it explains why the Xeon wins all multi-threaded benchmarks despite its much lower clock speed.

Cache allocation also differs. Both chips have 64 KB of L1 cache per core and 256 KB of L2 cache per core. The L3 cache is shared and the Xeon carries 25 MB, compared to 15 MB on the Core i7. That 10 MB difference gives the Xeon more room for shared working sets in server-style workloads. The Core i7’s base clock is 3.50 GHz with a boost clock of 3.70 GHz. The Xeon’s base clock is 2,000.00 MHz, which equals 2.00 GHz, and its boost clock is 2.50 GHz. The clock speed gap is significant: the Core i7 runs at a much higher frequency, but the Xeon compensates with 4 additional cores.

Memory support is DDR4 for both, and both use a quad-channel memory bus. The recorded memory bandwidth figures differ: the Core i7 reaches 68.3 GB/s, while the Xeon is rated at 59.7 GB/s. ECC memory support is present only on the Xeon. The Core i7 does not support ECC. Both processors provide PCIe Gen 3 with 40 lanes from the CPU. The Core i7 has an unlocked multiplier, while the Xeon’s multiplier is locked. The Core i7 is classified as a desktop part, the Xeon as a server or workstation part. Both are end-of-life products. The Core i7 was released on 2014-08-31, and the Xeon followed on 2014-09-07. The Xeon has a launch MSRP of $1364.

The integrated graphics field is empty for both chips, meaning neither includes an iGPU. The market positioning is clear: the Core i7 targets high-frequency desktop builds with overclocking, while the Xeon targets low-power, high-core-count servers. The 75 W TDP of the Xeon versus the 140 W TDP of the Core i7 is a defining architectural choice. The Xeon achieves its efficiency through lower clocks and a larger core count, while the Core i7 pushes frequency and relies on a higher power budget.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Xeon E5-2628L v3 has 10 cores and 20 threads. The Intel Core i7-5930K has 6 cores and 12 threads.

Q: Do both processors support ECC memory?

A: No. The Xeon E5-2628L v3 supports ECC memory, while the Core i7-5930K does not.

Q: What is the power consumption difference between the two?

A: The Core i7-5930K has a thermal design power of 140 W. The Xeon E5-2628L v3 has a TDP of 75 W. The Xeon consumes significantly less power under its rated envelope.

Q: Which chip has a larger L3 cache?

A: The Xeon E5-2628L v3 has 25 MB of shared L3 cache. The Core i7-5930K has 15 MB.

Q: Are both processors unlocked for overclocking?

A: No. The Core i7-5930K has an unlocked multiplier. The Xeon E5-2628L v3 has a locked multiplier.

Q: Which chip wins in the recorded benchmark suite?

A: The Xeon E5-2628L v3 wins all six head-to-head benchmarks. It leads by 6.6% in most tests, with the single-core R15 test showing a 6% lead.

Specification Differences

The two processors share several core specifications: both are 22 nm parts from Intel, both have 2,600 million transistors, both use a 356 mm² die, both support DDR4 memory with a quad-channel bus, and both provide 40 PCIe Gen 3 lanes from the CPU. Neither has integrated graphics. The differences are substantial in the other fields.

Core and thread counts differ: 6 cores and 12 threads for the Core i7, 10 cores and 20 threads for the Xeon. Base clock speeds are 3.50 GHz for the Core i7 and 2,000.00 MHz (2.00 GHz) for the Xeon. Boost clocks are 3.70 GHz versus 2.50 GHz. The TDP is 140 W for the Core i7 and 75 W for the Xeon. The L3 cache is 15 MB shared on the Core i7 and 25 MB shared on the Xeon. Memory bandwidth is 68.3 GB/s on the Core i7 and 59.7 GB/s on the Xeon. ECC memory support is absent on the Core i7 and present on the Xeon. The multiplier is unlocked on the Core i7 and locked on the Xeon. The market segment is Desktop for the Core i7 and Server/Workstation for the Xeon. The codename is Haswell-E for the Core i7 and Haswell-EP for the Xeon. The release dates are 2014-08-31 for the Core i7 and 2014-09-07 for the Xeon. The part numbers are SR20R for the Core i7 and SR1XZ for the Xeon. The Xeon has a launch MSRP of $1364, while the Core i7 has no recorded launch MSRP in the database.

The Verdict

The recorded data points to a clear winner for multi-threaded workloads: the Xeon E5-2628L v3. It wins all six head-to-head benchmarks, and its 10-core, 20-thread configuration gives it a structural advantage in parallel tasks. The Xeon also offers ECC memory support, a 25 MB L3 cache, and a 75 W TDP, which is nearly half the 140 W TDP of the Core i7. For server and workstation environments where data integrity, power efficiency, and core count matter, the Xeon is the better choice.

The Core i7-5930K is the better option for desktop builders who prioritize high clock speeds and overclocking. Its 3.50 GHz base and 3.70 GHz boost clocks are far above the Xeon’s 2.00 GHz base and 2.50 GHz boost. The unlocked multiplier allows frequency tuning, which the Xeon cannot do. The Core i7 also has higher memory bandwidth at 68.3 GB/s, compared to 59.7 GB/s on the Xeon. For single-threaded tasks that rely on frequency, the Core i7 is the more capable part, even though the benchmark scores show the Xeon winning those tests as well.

The database’s percentile rankings put the Core i7 at the 51st percentile of all CPUs and the Xeon at the 50th. The average benchmark score is 2775 for the Core i7 and 2724 for the Xeon. In the nearest rival lists, the Core i7 sits close to the AMD Ryzen 3 PRO 4350G with a negligible score difference, while the Xeon sits near the AMD Ryzen 7 4700U. The choice comes down to the use case: the Xeon for servers, workstations, and power-sensitive deployments, the Core i7 for desktop frequency-focused builds. Both are end-of-life, so availability is a secondary concern. The data does not support a universal recommendation. It supports a workload-specific one.

Head-to-Head Benchmarks

The Xeon E5-2628L v3 wins every recorded head-to-head benchmark. The closest margin is in Cinebench R15 single-core, where the Xeon scores 133 against the Core i7’s 125, a lead of 6%. In Cinebench R15 multi-core, the Xeon scores 949 against 886, a 6.6% advantage. The multi-core gap is consistent across all three Cinebench versions. In Cinebench R20 multi-core, the Xeon scores 3955 and the Core i7 scores 3692, again a 6.6% difference. In Cinebench R20 single-core, the Xeon scores 558 and the Core i7 scores 521, another 6.6% lead. In Cinebench R23 multi-core, the Xeon scores 9417 versus 8791, a 6.6% margin. In Cinebench R23 single-core, the Xeon scores 1329 versus 1241, also 6.6% ahead. The win count is 6 for the Xeon and 0 for the Core i7.

The consistency of the 6.6% margin across nearly every test is notable. It suggests a steady performance advantage rather than a workload-specific spike. The Xeon’s extra 4 cores and 20 threads likely drive the multi-core wins, while its higher single-core scores in the recorded tests indicate that even in frequency-sensitive tasks, the Xeon’s measured results are superior. The Core i7’s higher clock speeds do not translate into benchmark wins in this dataset. The Geekbench scores are recorded only for the Core i7: 5715 multi-core and 1225 single-core. The Xeon has no Geekbench entries in the database, so a direct comparison there is not possible from the recorded data.

The Core i7 does have a higher average benchmark score of 2775, compared to the Xeon’s 2724. That average includes the Geekbench results, which are present only for the Core i7. The head-to-head Cinebench suite, which includes both chips, favors the Xeon in every case. The Xeon’s nearest rivals include the AMD Ryzen 7 4700U with a 0.1% score difference, the Intel Core i7-11390H with a 0.3% difference, and the Intel Xeon D-1577 with a 0.3% difference. The Core i7’s nearest rivals include the AMD Ryzen 3 PRO 4350G with a negligible difference, the Intel Xeon D-1567 with a 0.2% difference, and the AMD Ryzen 3 PRO 4350GE with a 0.3% difference. These rankings place both chips in the same general performance tier, despite the Xeon’s head-to-head sweep.

The largest wins for the Xeon are all 6.6% margins in the Cinebench R20 and R23 tests, both single-core and multi-core. The smallest win is the 6% margin in Cinebench R15 single-core. The Core i7 has no wins in the head-to-head set. For users relying on the complete Cinebench suite, the Xeon is the stronger performer. For users who value clock speed, overclocking, and the desktop feature set, the Core i7 remains relevant, but the recorded benchmarks do not show it winning any of the shared tests. The data is unambiguous: the Xeon E5-2628L v3 outperforms the Core i7-5930K in every measured head-to-head comparison.