CPU Comparison

The Intel Xeon E-2174G and Intel Core i7-5820K represent two very different approaches to high-end x86 computing, separated by four years of architecture evolution. The Xeon is a modern 4-core Coffee Lake workstation part, while the i7 is a 6-core Haswell-E enthusiast desktop processor. Benchmark data shows a clear split: the older i7 dominates multi-threaded workloads, but the newer Xeon delivers a decisive single-core victory. This analysis breaks down the head-to-head numbers, architectural causes, and which processor suits which task.

Head-to-Head Benchmarks

The benchmark suite reveals a consistent pattern across seven of the eight tests: the Intel Core i7-5820K wins, but by a surprisingly narrow margin given its two-core and four-thread advantage. In Cinebench R15 multicore, the i7 scores 841 against the Xeon's 815, a 3.1% lead. That margin holds almost exactly across Cinebench R20 (3508 vs 3398, -3.1%) and Cinebench R23 (8354 vs 8091, -3.1%). The i7's largest multi-core victory comes in Geekbench multicore, where it posts 5464 versus 5104, a 6.6% edge.

Single-core results tell a different story. The Xeon E-2174G wins Geekbench singlecore decisively, scoring 1559 against the i7's 1174, a massive 32.8% advantage. However, in the three Cinebench single-core tests, the i7 actually wins by 3.1% to 3.4%. This discrepancy is notable: in Cinebench R15 singlecore, the i7 scores 118 versus 114; in R20, 495 versus 479; in R23, 1179 versus 1142. So while the Xeon dominates Geekbench's single-threaded test, the i7 edges it out in Cinebench's.

The overall benchmark averages reflect this split. The i7's average benchmark score is 2642, placing it in the 49th percentile of all CPUs. The Xeon averages 2588, also in the 49th percentile. The i7's nearest rival is the Intel Xeon E-2274G (avg 2643, delta 0%), while the Xeon's closest competitor is the AMD Ryzen 3 PRO 4355GE (avg 2596, delta -0.3%). The i7 wins 7 of 8 head-to-head tests, with the Xeon's sole victory being that 32.8% Geekbench single-core blowout.

Where Each One Wins

The Intel Core i7-5820K is the clear winner for heavily threaded workloads. Its six cores and twelve threads give it a structural advantage that shows up consistently across all three Cinebench versions, whether rendering or simulating. The 3.1% lead in Cinebench R15, R20, and R23 multicore suggests that the older Haswell architecture scales well with additional cores, even against a newer 14nm part. The Geekbench multicore result (6.6% ahead) reinforces this: for video rendering, 3D modeling, or any CPU-bound productivity task that uses all threads, the i7 is the safer pick.

The Intel Xeon E-2174G wins in a specific scenario: Geekbench singlecore. Its 1559 score versus 1174 is not a marginal victory but a dominant one, indicating far better per-core IPC in that benchmark. This suggests the Xeon is better suited for lightly threaded applications that depend on raw single-thread speed, such as legacy software, certain database queries, or real-time workloads where one thread is the bottleneck. However, this advantage does not extend to Cinebench single-core, where the i7 wins by roughly 3%. So the Xeon's single-core win is benchmark-specific rather than universal.

For everyday mixed use, the data leans toward the i7. It wins more tests, and its multi-core lead, while modest, is consistent. The Xeon's single-core Geekbench victory is impressive but isolated. Users who run a mix of office, web, and moderate creative workloads may not notice the difference; those who push sustained all-core loads will prefer the i7.

Architecture Differences

The two CPUs come from different eras and use fundamentally different designs. The Intel Xeon E-2174G is built on the Coffee Lake architecture, specifically the Coffee Lake-S WS variant, using a 14 nm process node. It packs 4 cores and 8 threads, with a base clock of 3.80 GHz and a boost clock of 4.70 GHz. The die size is 126 mm², and it has 8 MB of shared L3 cache, with 64 KB L1 and 256 KB L2 per core. The Xeon sits on the Intel Socket 1151 platform, supports dual-channel DDR4 memory with 42.7 GB/s bandwidth, and includes ECC memory support. It also has integrated HD Graphics P630, which the i7 lacks entirely. The Xeon provides 16 PCIe Gen 3 lanes (CPU only), has a 71W TDP, and was released in July 2018 with a launch MSRP of $334. Its multiplier is locked.

The Intel Core i7-5820K is a Haswell-E part, fabricated on a 22 nm process with 2,600 million transistors on a much larger 356 mm² die. It offers 6 cores and 12 threads, but clocks are lower: 3.30 GHz base and 3.60 GHz boost. The cache hierarchy includes 15 MB of shared L3, with the same 64 KB L1 and 256 KB L2 per core. It uses the Intel Socket 2011-3 platform and supports quad-channel DDR4 memory, doubling the memory bandwidth to 68.3 GB/s. There is no ECC support and no integrated graphics. The i7 provides 28 PCIe Gen 3 lanes (CPU only), has a much higher 140W TDP, and was released in August 2014. Its multiplier is unlocked, allowing overclocking.

The architectural contrast explains the benchmark outcomes. The i7's two extra cores and four extra threads drive its multi-core wins, while its larger L3 cache (15 MB vs 8 MB) helps in cache-heavy workloads. The Xeon's higher clocks (4.70 GHz boost vs 3.60 GHz boost) and newer process node explain its Geekbench single-core dominance, despite fewer cores. The i7's quad-channel memory controller provides 68.3 GB/s versus the Xeon's 42.7 GB/s, a significant bandwidth advantage for memory-intensive tasks. However, the Xeon's ECC support and integrated graphics make it a more self-contained workstation part, whereas the i7 assumes a discrete GPU and server-grade memory setup.

FAQ

Q: Which CPU has more cores and threads?

A: The Intel Core i7-5820K has 6 cores and 12 threads, while the Intel Xeon E-2174G has 4 cores and 8 threads.

Q: What is the largest benchmark margin between the two?

A: The Intel Xeon E-2174G wins Geekbench singlecore by 32.8%, scoring 1559 against the i7-5820K's 1174.

Q: Does the i7-5820K win every multi-core test?

A: Yes, the i7-5820K wins all four multi-core tests: Cinebench R15 (841 vs 815), R20 (3508 vs 3398), R23 (8354 vs 8091), and Geekbench multicore (5464 vs 5104).

Q: Which CPU supports ECC memory?

A: The Intel Xeon E-2174G supports ECC memory; the Intel Core i7-5820K does not.

Q: What is the memory bandwidth difference?

A: The i7-5820K provides 68.3 GB/s via quad-channel DDR4, while the Xeon E-2174G provides 42.7 GB/s via dual-channel DDR4.

Q: Are both CPUs still in production?

A: No, both the Intel Xeon E-2174G and the Intel Core i7-5820K are end-of-life products.

The Verdict

The data points to a straightforward conclusion: the Intel Core i7-5820K is the stronger processor for most workloads. It wins 7 of 8 head-to-head benchmarks, including every multi-core test, and its average benchmark score (2642) exceeds the Xeon's (2588). The i7's two additional cores and quad-channel memory bandwidth deliver a consistent, if modest, multi-threaded advantage. For users running renderers, compilers, or any software that scales across cores, the i7-5820K is the clear choice.

The Intel Xeon E-2174G is not without merit. Its 32.8% Geekbench singlecore victory shows that its high boost clock and modern architecture can deliver exceptional per-thread performance in certain benchmarks. It also offers ECC memory support and integrated graphics, features absent from the i7. For workstation environments requiring error-correcting memory or a CPU with built-in display output, the Xeon is the only option here. Its lower 71W TDP also makes it easier to cool.

However, the i7-5820K's unlocked multiplier and 28 PCIe lanes make it more flexible for enthusiast builds, and its higher memory bandwidth (68.3 GB/s) benefits memory-intensive applications. The Xeon's single-core win in Geekbench does not translate to Cinebench, where the i7 wins single-core as well. Given that the i7 wins more tests and ties in the 49th percentile ranking, the verdict is clear: pick the i7-5820K for raw performance and versatility, and choose the Xeon E-2174G only if ECC memory or integrated graphics are non-negotiable requirements.