Intel Core i9-9980HK vs Intel Xeon E5-1680 v4 Comparison

Architecture Differences

The Intel Core i9-9980HK and Intel Xeon E5-1680 v4 represent two distinct design philosophies from Intel, separated by three years of development and aimed at entirely different market segments. The database records the i9-9980HK as a Coffee Lake-HR part, built on the mobile-oriented Coffee Lake architecture, while the Xeon E5-1680 v4 belongs to the Broadwell-EP family, Intel's server and workstation line. Both chips use the same 14 nm process node and are manufactured by Intel, but that is where the architectural similarities largely end.

The most obvious divergence lies in packaging and platform design. The i9-9980HK is a mobile processor soldered to Intel BGA 1440, a ball-grid array socket that is not user-upgradable. The Xeon E5-1680 v4, by contrast, uses Intel Socket 2011-3, the LGA platform designed for high-end desktop and workstation builds. This socket difference alone dictates the entire system context: the i9 is destined for laptops and compact all-in-ones, while the Xeon sits in larger tower workstations with expandable memory and storage.

Transistor counts and die sizes reveal another layer of architectural difference. The Xeon E5-1680 v4 packs 3,400 million transistors onto a 246 mm² die, while the i9-9980HK's die size is recorded at 149 mm². For the same 8-core, 16-thread configuration, the Xeon's die is roughly 65% larger by area, reflecting the Broadwell-EP design's focus on server-grade features and a more expansive uncore. The mobile chip's smaller die suggests a more tightly integrated design optimized for power efficiency rather than raw platform capability.

Cache hierarchies differ as well. Both processors allocate 64 KB of L1 and 256 KB of L2 per core, but the shared L3 cache is not equal: the i9-9980HK has 16 MB shared, while the Xeon E5-1680 v4 carries 20 MB shared. That additional 4 MB of L3 gives the Xeon a larger pool of fast memory for frequently accessed data, which can matter in workloads with large working sets.

Integrated graphics represent a fundamental architectural split. The i9-9980HK includes Intel UHD 630 graphics, enabling a complete system without a discrete GPU. The Xeon E5-1680 v4 has no integrated graphics at all, meaning it requires a separate graphics card for any display output. This absence aligns with the Xeon's server heritage, where headless operation is common.

Memory architecture also diverges sharply. The i9-9980HK supports dual-channel DDR4 with a recorded memory bandwidth of 42.7 GB/s, while the Xeon E5-1680 v4 supports quad-channel DDR4 and reaches 76.8 GB/s. The Xeon also supports ECC memory, which the i9 does not. For memory-intensive tasks, the Xeon's platform offers nearly double the theoretical bandwidth and the reliability of error-correcting memory.

PCIe connectivity follows the server trend. The Xeon E5-1680 v4 provides Gen 3 with 40 lanes from the CPU, while the i9-9980HK's PCIe configuration is listed simply as Gen 3 without a lane count in the database. The Xeon's 40 lanes support multi-GPU setups and high-speed storage arrays, whereas the mobile chip's lane allocation is typically more constrained.

The i9-9980HK has an unlocked multiplier, enabling overclocking on supported platforms. The Xeon E5-1680 v4's multiplier is locked. The mobile chip's boost clock reaches 5.00 GHz, while the Xeon tops out at 4.00 GHz. The base clocks tell a different story: the i9 runs at 2.40 GHz, the Xeon at 3.40 GHz.

Specification Differences

The recorded specifications highlight where these two processors diverge. The i9-9980HK and Xeon E5-1680 v4 both feature 8 cores and 16 threads, so the core count is identical. The process node is also the same at 14 nm, and both are manufactured by Intel.

Clock speeds differ significantly. The i9-9980HK has a base clock of 2.40 GHz and a boost clock of 5.00 GHz. The Xeon E5-1680 v4 runs at 3.40 GHz base and 4.00 GHz boost. The i9's boost advantage is 1.00 GHz, while the Xeon's base advantage is also 1.00 GHz.

Thermal design power is a major differentiator. The i9-9980HK is rated at 45 W TDP, while the Xeon E5-1680 v4 draws 140 W TDP. That is more than triple the thermal envelope for the server chip, reflecting its higher base clock and larger die.

Memory support shows the platform gap. Both support DDR4, but the i9 uses a dual-channel memory bus with 42.7 GB/s bandwidth, while the Xeon uses a quad-channel bus with 76.8 GB/s. ECC memory is supported only on the Xeon.

Cache differs in L3 capacity: 16 MB shared on the i9 versus 20 MB shared on the Xeon. L1 and L2 are identical at 64 KB and 256 KB per core respectively.

The i9-9980HK includes integrated UHD 630 graphics; the Xeon has none. The Xeon provides Gen 3 PCIe with 40 lanes from the CPU, while the i9's lane count is not specified in the database.

The i9-9980HK targets the mobile segment, the Xeon E5-1680 v4 targets desktop. Both are end-of-life products. The i9 was released on 2019-04-22, the Xeon on 2016-06-19. The Xeon's launch MSRP is $1723; the i9 has no recorded launch MSRP. The i9's multiplier is unlocked, the Xeon's is locked.

FAQ

Q: Which processor has the higher boost clock?

A: The Intel Core i9-9980HK boosts to 5.00 GHz, while the Intel Xeon E5-1680 v4 boosts to 4.00 GHz.

Q: Does the Xeon E5-1680 v4 support ECC memory?

A: Yes, the Xeon E5-1680 v4 supports ECC memory. The Core i9-9980HK does not.

Q: How do the memory bandwidth figures compare?

A: The Xeon E5-1680 v4 provides 76.8 GB/s over a quad-channel DDR4 bus, while the Core i9-9980HK provides 42.7 GB/s over a dual-channel DDR4 bus.

Q: Which chip has more L3 cache?

A: The Xeon E5-1680 v4 has 20 MB shared L3 cache, compared to 16 MB shared on the Core i9-9980HK.

Q: Can the Core i9-9980HK be overclocked?

A: Yes, the Core i9-9980HK has an unlocked multiplier. The Xeon E5-1680 v4's multiplier is locked.

Q: What is the TDP difference between the two processors?

A: The Core i9-9980HK is rated at 45 W TDP, while the Xeon E5-1680 v4 is rated at 140 W TDP.

Head-to-Head Benchmarks

The head-to-head benchmark data in the database covers six Cinebench tests, and the results are remarkably consistent: the Intel Xeon E5-1680 v4 wins every single recorded test, though by a narrow margin in each case. The i9-9980HK records zero wins, while the Xeon takes all six.

In Cinebench R15 multicore, the Xeon scores 1217 against the i9's 1193, a delta of -2% for the i9. The single-core R15 test shows the Xeon at 171 and the i9 at 168, a delta of -1.8%. Moving to Cinebench R20, the multicore result is 5073 for the Xeon versus 4971 for the i9, again a -2% delta. The R20 single-core test has the Xeon at 716 and the i9 at 701, a -2.1% delta.

Cinebench R23 repeats the pattern. The multicore test shows the Xeon at 12080 and the i9 at 11836, a -2% delta. The single-core R23 result is 1705 for the Xeon and 1671 for the i9, a -2% delta.

The consistency of these results is striking. Across every generation of the Cinebench suite, the Xeon maintains a roughly 2% lead. This despite the i9's much higher boost clock of 5.00 GHz versus 4.00 GHz, and its significantly lower TDP of 45 W versus 140 W. The Xeon's higher base clock of 3.40 GHz versus 2.40 GHz appears to provide a steady advantage in these rendering workloads, which tend to scale with sustained all-core frequency.

The single-core margins are slightly tighter in percentage terms, ranging from -1.8% to -2.1%, while the multicore deltas hold steady at -2% across all three Cinebench versions. This suggests the Xeon's advantage is not purely about core scaling but about per-thread efficiency in this specific benchmark family.

For context, the average benchmark scores in the database place these chips close together. The i9-9980HK has an average benchmark score of 3577 and sits at the 55th percentile of all CPUs. The Xeon E5-1680 v4 has an average benchmark score of 3494, also at the 55th percentile. The i9's nearest rival, the AMD Ryzen 7 5825C, scores 3579, which is -0.1% relative to the i9. The Xeon's nearest rival, the Intel Xeon E-2246G, scores 3492, which is 0.1% relative to the Xeon.

The benchmark picture is nuanced: the Xeon wins the head-to-head Cinebench tests, but the i9 has a slightly higher average benchmark score across the broader database. This reflects the different benchmark mixes each chip has been subjected to, as well as the fact that the i9's Geekbench scores, recorded at 6687 multicore and 1389 singlecore, are not part of the head-to-head comparison set.

Where Each One Wins

The Xeon E5-1680 v4 wins in rendering workloads as measured by Cinebench, taking all six head-to-head tests with margins of roughly 2%. Its quad-channel memory bus, 76.8 GB/s bandwidth, and 20 MB L3 cache make it well suited for tasks that stress sustained memory throughput and larger working sets. ECC memory support adds appeal for data integrity in professional workflows.

The i9-9980HK wins in the broader picture of average benchmark score, recording 3577 versus the Xeon's 3494. Its 5.00 GHz boost clock and unlocked multiplier give it headroom for single-threaded burst workloads and enthusiast tuning on mobile platforms. The integrated UHD 630 graphics mean a complete system can operate without a discrete GPU, which is valuable in compact laptops. Its 45 W TDP enables thin-and-light designs that the 140 W Xeon could never fit into.

The mobile segment is the i9's clear territory. No Xeon E5-1680 v4 system could match the portability of a laptop built around the i9-9980HK. Conversely, the Xeon's desktop workstation platform, with 40 PCIe lanes and quad-channel memory, supports configurations the mobile chip cannot: multiple GPUs, high-capacity ECC memory, and extensive storage arrays.

The Verdict

The recorded data presents a clear but narrow technical victory for the Intel Xeon E5-1680 v4 in Cinebench rendering performance, winning all six head-to-head tests by approximately 2%. This consistency across R15, R20, and R23 suggests a fundamental per-thread efficiency advantage, likely rooted in its higher base clock of 3.40 GHz and larger 20 MB L3 cache, despite the i9's superior 5.00 GHz boost clock.

The Core i9-9980HK counters with a higher average benchmark score of 3577, a more favorable position in the database's broader metric, and the practical advantages of integrated graphics, an unlocked multiplier, and a 45 W TDP that enables mobile form factors. Its 55th percentile ranking matches the Xeon's, placing both chips in the same performance tier overall.

Users who need a mobile workstation with strong single-threaded burst performance and the ability to overclock should look to the i9-9980HK. Users who require ECC memory, quad-channel bandwidth, and sustained rendering performance in a desktop workstation should choose the Xeon E5-1680 v4. The data does not support calling either chip a clear overall winner; it supports calling each the right tool for a different job.