Intel Core i9-9980HK vs Intel Xeon E5-2678 v3 Comparison

The Intel Xeon E5-2678 v3 and Intel Core i9-9980HK represent two very different approaches to x86 computing: a 12-core server/workstation part built for sustained throughput on a 22 nm Haswell-EP architecture, and an 8-core mobile flagship on 14 nm Coffee Lake-HR designed for high single-thread bursts. Despite the i9’s newer design and higher boost clock, the data shows a clean sweep for the Xeon across every Cinebench iteration tested, with a consistent 5.4% margin in both single-core and multi-core workloads. However, the two chips are far closer in overall average benchmark score than their architectural differences suggest, with the Xeon at 3608 and the i9 at 3577.

Where Each One Wins

The benchmark results are unambiguous: the Xeon E5-2678 v3 wins all six head-to-head Cinebench comparisons. This includes the multi-core tests where its 12 cores and 24 threads give it a structural advantage over the i9-9980HK’s 8 cores and 16 threads. In Cinebench R23 multi-core, the Xeon scores 12474 against the i9’s 11836, a 5.4% advantage. The same 5.4% delta appears in Cinebench R20 multi-core, where the Xeon posts 5239 versus 4971, and in Cinebench R15 multi-core, with scores of 1257 and 1193 respectively.

What is more surprising is that the Xeon also wins every single-core test, despite the i9’s 5.00 GHz boost clock versus the Xeon’s 3.30 GHz. In Cinebench R23 single-core, the Xeon scores 1761 against the i9’s 1671; in R20 single-core, it is 739 versus 701; and in R15 single-core, it is 177 versus 168. Each of these wins is also exactly 5.4%, mirroring the multi-core margins. This suggests the i9’s high boost clock does not translate into a measurable performance advantage in these specific Cinebench workloads, and the Xeon’s older but larger architecture holds its own in lightly-threaded tasks.

The i9-9980HK does have a win in the broader benchmark suite: it is the only one of the two with a Geekbench result, scoring 6687 multi-core and 1389 single-core. However, since no corresponding Geekbench score exists for the Xeon in the data, this cannot be compared head-to-head. The i9 also carries an integrated UHD 630 graphics unit, which the Xeon lacks entirely, making the i9 the only option for systems that need a built-in display output without a discrete GPU.

Architecture Differences

The two processors come from different eras and serve different sockets. The Xeon E5-2678 v3 uses the Intel Socket 2011-3 platform, while the i9-9980HK is a BGA 1440 mobile part, meaning it is soldered to the motherboard and not upgradeable in a traditional sense. The Xeon is built on Intel’s 22 nm process with a die size of 356 mm² and 2,600 million transistors; the i9 uses a smaller 14 nm process with a 149 mm² die, and its transistor count is not listed in the data.

Core and cache configurations diverge sharply. The Xeon has 12 cores and 24 threads, with 64 KB of L1 and 256 KB of L2 per core, plus a shared 30 MB L3 cache. The i9 has 8 cores and 16 threads, with the same per-core L1 and L2 sizes but only 16 MB of shared L3. The Xeon’s larger L3 cache is consistent with its server pedigree, where more cache helps feed more cores in multi-threaded workloads.

Memory support also differs fundamentally. The Xeon supports both DDR3 and DDR4 across a quad-channel memory bus, delivering 68.3 GB/s of bandwidth. The i9 supports only DDR4 on a dual-channel bus, capping at 42.7 GB/s. This is a major differentiator: the Xeon provides roughly 60% more memory bandwidth, which can matter in memory-intensive server tasks. The Xeon also supports ECC memory, which the i9 does not, making the Xeon the only viable choice for error-correcting memory configurations. The Xeon’s PCIe implementation is listed as Gen 3 with 40 lanes from the CPU, while the i9 simply lists Gen 3 without a lane count. The Xeon is not multiplier-unlocked, whereas the i9 has an unlocked multiplier, allowing overclocking on supported platforms.

Head-to-Head Benchmarks

The head-to-head data is remarkably uniform: every Cinebench test, from R15 to R23, in both single-core and multi-core variants, shows the Xeon winning by exactly 5.4%. This consistency suggests the performance gap is systematic rather than workload-specific. In Cinebench R23 multi-core, the Xeon’s 12474 versus 11836 represents a 638-point lead, the largest absolute margin in the dataset. In the same test’s single-core run, the Xeon’s 1761 edges out the i9’s 1671 by 90 points.

The pattern holds in Cinebench R20: multi-core scores are 5239 for the Xeon and 4971 for the i9, a 268-point difference, while single-core is 739 versus 701, a 38-point gap. In Cinebench R15, the multi-core result is 1257 versus 1193, a 64-point lead, and single-core is 177 versus 168, a 9-point margin. Across all six tests, the deltaPct is constant at 5.4%, indicating that the Xeon’s advantage scales equally in lightly-threaded and heavily-threaded scenarios.

The average benchmark scores tell a similar story at a higher level. The Xeon E5-2678 v3 has an average benchmark score of 3608, placing it at the 55th percentile of all CPUs. Its nearest rival is the Intel Xeon E-2286G at 3610, a 0.1% difference, and the AMD Ryzen 7 PRO 1700 at 3613, also 0.1% behind. The i9-9980HK averages 3577, also at the 55th percentile, with its nearest rival being the AMD Ryzen 7 5825C at 3579, a 0.1% gap. Notably, the i9’s rivals list includes the Xeon E5-2678 v3 itself, with the Xeon sitting 0.9% ahead of the i9 in average score. This means that despite the i9’s newer architecture and higher boost clock, the Xeon holds a measurable, if modest, overall edge in the benchmark database.

The Verdict

The data points to a clear recommendation based on workload and platform requirements. The Xeon E5-2678 v3 is the better choice for multi-threaded, memory-bandwidth-hungry server or workstation tasks. It offers 12 cores versus 8, quad-channel memory support with 68.3 GB/s bandwidth versus dual-channel 42.7 GB/s, and ECC memory capability, all while winning every Cinebench test by 5.4%. Its 30 MB of L3 cache versus 16 MB further supports heavily-threaded database, rendering, or virtualization workloads. The Xeon is end-of-life, but its performance profile remains competitive at the 55th percentile.

The i9-9980HK is the pick for a mobile or compact system where the integrated UHD 630 graphics and 45 W TDP matter more than raw multi-core throughput. It is a BGA 1440 part, meaning it comes soldered into a laptop or mini-PC, and its unlocked multiplier offers overclocking headroom that the Xeon lacks. It loses every Cinebench comparison by the same 5.4% margin, but its average score of 3577 is only 0.9% behind the Xeon, so the real-world difference in many applications will be small. For users who need ECC memory or maximum memory bandwidth, the i9 is disqualified outright; for users who need integrated graphics or a low-power mobile platform, the Xeon is not an option.

FAQ

Q: Which processor wins in multi-core performance?

A: The Intel Xeon E5-2678 v3 wins all multi-core Cinebench tests. In R23 multi-core, it scores 12474 versus the i9-9980HK’s 11836, a 5.4% advantage. The same 5.4% margin appears in R20 (5239 versus 4971) and R15 (1257 versus 1193).

Q: Does the i9-9980HK win in single-core performance due to its higher boost clock?

A: No. Despite the i9’s 5.00 GHz boost clock versus the Xeon’s 3.30 GHz, the Xeon wins every single-core Cinebench test by 5.4%. In R23 single-core, the Xeon scores 1761 versus 1671; in R20, it is 739 versus 701; in R15, it is 177 versus 168.

Q: What are the core and thread counts for each processor?

A: The Xeon E5-2678 v3 has 12 cores and 24 threads. The Core i9-9980HK has 8 cores and 16 threads.

Q: Which processor supports ECC memory?

A: The Xeon E5-2678 v3 supports ECC memory. The i9-9980HK does not support ECC memory.

Q: How do their average benchmark scores compare?

A: The Xeon E5-2678 v3 has an average benchmark score of 3608, while the i9-9980HK averages 3577. Both sit at the 55th percentile of all CPUs, and the Xeon leads by 0.9% in the i9’s rival list.

Q: Which processor has integrated graphics?

A: The i9-9980HK includes integrated UHD 630 graphics. The Xeon E5-2678 v3 has no integrated graphics listed in the data.