Intel Core i9-9980HK vs Intel Xeon E5-1681 v3 Comparison

Where Each One Wins

The benchmark data presents an unusually clear split: the Intel Xeon E5-1681 v3 wins every single recorded comparison. Across six Cinebench tests, the Xeon takes all six victories, while the Core i9-9980HK records zero wins in the head-to-head results. This is not a case of one chip dominating in one workload category and the other taking the rest; the Xeon leads in both multi-core and single-core tests, and it does so consistently.

The Xeon E5-1681 v3 is the stronger choice for multi-threaded rendering workloads. In Cinebench R23 multi-core, it scores 12597 against the i9-9980HK's 11836, a 6.4% advantage. That margin repeats in Cinebench R20 multi-core with 5290 versus 4971, and in Cinebench R15 multi-core with 1269 versus 1193. The pattern holds across all three Cinebench versions, which is notable because these workloads scale with core count, thread count, and memory bandwidth. The Xeon's 10 cores and 20 threads outnumber the i9's 8 cores and 16 threads, and its quad-channel DDR4 memory bus provides 68.3 GB/s of bandwidth compared to the i9's dual-channel 42.7 GB/s. For sustained rendering tasks, the Xeon has the structural advantages.

The single-core results are more surprising. The Xeon also wins every single-core test, despite the i9's much higher boost clock of 5.00 GHz versus the Xeon's 3.50 GHz. In Cinebench R23 single-core, the Xeon scores 1778 against 1671, a 6.4% edge. The same margin appears in Cinebench R20 single-core with 746 versus 701, and in Cinebench R15 single-core with 179 versus 168. The database records the i9 as having an unlocked multiplier, so overclocking could alter these numbers in practice, but the stock recorded data clearly favors the Xeon in single-threaded performance as well.

The i9-9980HK does have one benchmark category that the Xeon lacks entirely: Geekbench scores. The i9 records 6687 in Geekbench multi-core and 1389 in Geekbench single-core. However, the head-to-head table does not include Geekbench comparisons, so these numbers cannot be used to claim a win for either processor. They simply exist as additional data points for the i9, showing that it is a capable mobile processor in its own right.

The average benchmark score tells a similar story, though with a smaller gap. The Xeon E5-1681 v3 has an average score of 3643, while the i9-9980HK has 3577. The Xeon's nearest rivals in the database include the Intel Core i9-10885H at 3651, a 0.2% difference, and the Intel Xeon E5-2658A v3 at 3658, a 0.4% difference. The i9-9980HK's nearest rivals include the AMD Ryzen 7 5825C at 3579, a 0.1% difference, and the AMD Ryzen 7 2700E at 3603, a 0.7% difference. Both processors sit at the 55th percentile among all CPUs in the database, meaning they are essentially mid-pack performers in the broader CPU landscape.

The Verdict

The data points to a straightforward conclusion: the Intel Xeon E5-1681 v3 is the better performer in every recorded benchmark. It wins all six head-to-head Cinebench tests, each by a 6.4% margin (with the single-core R15 test slightly higher at 6.5%). The Xeon also has a higher average benchmark score, 3643 versus 3577, a difference of roughly 1.8%. For anyone comparing these two processors strictly on the basis of the recorded measurements, the Xeon is the clear winner.

Who should pick the Xeon E5-1681 v3? Anyone whose work relies on multi-core rendering, video encoding, or other heavily threaded workloads. The 10-core, 20-thread configuration, combined with quad-channel memory and ECC support, makes it suited for server and workstation tasks. The processor targets the server and workstation market segment, and the recorded data supports that positioning. It also wins single-core tests, so even mixed workloads that include single-threaded tasks will see an advantage.

Who should pick the Intel Core i9-9980HK? The data does not support choosing it for raw performance, since it loses every recorded comparison. However, the i9 is a mobile processor with a 45 W TDP, while the Xeon has a 135 W TDP. The i9 is also a BGA 1440 package, designed to be soldered into laptops, whereas the Xeon uses the Intel Socket 2011-3 platform. The i9 includes integrated UHD 630 graphics, which the Xeon lacks entirely. For a laptop user who needs a processor with integrated graphics and a much lower power envelope, the i9 is the only practical choice, since the Xeon simply cannot fit into that form factor. The i9 also has an unlocked multiplier, which allows for overclocking in systems with adequate cooling. But in terms of the recorded benchmark numbers, the Xeon wins every comparison.

Head-to-Head Benchmarks

The largest margin in the head-to-head results belongs to Cinebench R15 single-core, where the Xeon E5-1681 v3 scores 179 against the i9-9980HK's 168, a 6.5% advantage. This is a notable result because the i9 has a significantly higher boost clock, 5.00 GHz versus 3.50 GHz, yet the Xeon still comes out ahead. The Xeon's Haswell architecture appears to deliver better single-threaded efficiency per clock in this workload, at least as recorded in the database.

Every other head-to-head test shows a 6.4% delta. In Cinebench R15 multi-core, the Xeon scores 1269 versus 1193. In Cinebench R20 multi-core, it scores 5290 versus 4971. In Cinebench R20 single-core, it scores 746 versus 701. In Cinebench R23 multi-core, it scores 12597 versus 11836. In Cinebench R23 single-core, it scores 1778 versus 1671. The consistency of this 6.4% margin across both single-core and multi-core tests suggests a fundamental per-clock efficiency advantage for the Xeon, rather than a workload-specific quirk.

The multi-core results align with the hardware specifications. The Xeon has 10 cores and 20 threads, 25 MB of shared L3 cache, and quad-channel memory. The i9 has 8 cores and 16 threads, 16 MB of shared L3 cache, and dual-channel memory. The Xeon should win multi-core tests by a reasonable margin, and it does. What is less expected is the single-core win, since the i9's boost clock is 43% higher on paper. The recorded data shows that raw clock speed does not translate directly into benchmark performance in these tests.

In the broader context of the database, the Xeon's average score of 3643 places it just behind the Intel Core i9-10885H, which averages 3651, a 0.2% gap. The i9-9980HK averages 3577, nearly identical to the AMD Ryzen 7 5825C at 3579, a 0.1% gap. Both processors occupy the same performance tier in the overall database, with the Xeon slightly ahead.

FAQ

Q: Which processor wins more benchmark tests?

A: The Intel Xeon E5-1681 v3 wins all six head-to-head Cinebench tests. The Intel Core i9-9980HK records zero wins in the head-to-head results.

Q: What is the largest performance gap between the two?

A: The largest gap is in Cinebench R15 single-core, where the Xeon E5-1681 v3 leads by 6.5%. All other head-to-head tests show a 6.4% advantage for the Xeon.

Q: Does the Core i9-9980HK win in single-core performance because of its higher boost clock?

A: No. The i9-9980HK has a 5.00 GHz boost clock, but it loses every single-core test to the Xeon E5-1681 v3, which has a 3.50 GHz boost clock.

Q: How do the two processors compare in the overall database?

A: Both sit at the 55th percentile among all CPUs. The Xeon has an average benchmark score of 3643, while the i9 has 3577.

Q: What are the core and thread counts?

A: The Xeon E5-1681 v3 has 10 cores and 20 threads. The Core i9-9980HK has 8 cores and 16 threads.

Q: Does the Xeon support ECC memory?

A: Yes, the Xeon E5-1681 v3 supports ECC memory. The Core i9-9980HK does not support ECC.

Architecture Differences

The two processors come from different Intel architectures and target entirely different market segments. The Xeon E5-1681 v3 is built on the Haswell architecture, specifically the Haswell-EP codename, and uses a 22 nm process node. It contains 2,600 million transistors on a 356 mm² die. The Core i9-9980HK is built on the Coffee Lake architecture, specifically Coffee Lake-HR, and uses a 14 nm process node. Its die size is 149 mm², and the database does not list a transistor count for it.

The core configurations differ significantly. The Xeon has 10 cores and 20 threads, while the i9 has 8 cores and 16 threads. Both have 64 KB of L1 cache per core and 256 KB of L2 cache per core, but the shared L3 cache differs: the Xeon has 25 MB shared, while the i9 has 16 MB shared. The Xeon's larger cache and higher core count contribute to its multi-core benchmark advantage.

Memory architecture is another major divider. The Xeon supports quad-channel DDR4 with a recorded memory bandwidth of 68.3 GB/s and includes ECC memory support. The i9 supports dual-channel DDR4 with a recorded memory bandwidth of 42.7 GB/s and has no ECC support. The Xeon's memory bandwidth is roughly 60% higher, which matters for memory-intensive workloads.

The socket and platform differences are substantial. The Xeon uses Intel Socket 2011-3, a desktop and workstation socket, while the i9 uses Intel BGA 1440, a soldered mobile package. The Xeon has a 135 W TDP, while the i9 has a 45 W TDP. The Xeon provides PCIe Gen 3 with 40 lanes from the CPU, while the i9 provides PCIe Gen 3 without a specified lane count. The Xeon has no integrated graphics, while the i9 includes Intel UHD 630 graphics.

The production status for both is end-of-life. The Xeon was released in September 2014, while the i9 was released in April 2019. The Xeon's generation is listed as Xeon E5 (Haswell-EP), and the i9's generation is listed as Core i9 (Coffee Lake-HR). The Xeon has a locked multiplier, while the i9 has an unlocked multiplier, meaning the i9 can be overclocked in a suitable system. The i9 also has a Geekbench score recorded in the database, with a multi-core score of 6687 and a single-core score of 1389, though no Geekbench head-to-head comparison exists for the Xeon.

In terms of market positioning, the Xeon is a server and workstation processor, while the i9 is a mobile processor. The Xeon's ECC support, quad-channel memory, and higher core count align with workstation requirements. The i9's integrated graphics, lower TDP, and unlocked multiplier align with high-end laptop use. The benchmark data shows the Xeon as the faster processor in every recorded Cinebench test, but the i9 remains the only option for mobile systems that require integrated graphics and a 45 W power envelope.