Intel Core i9-9820X

The Intel Core i9-9820X is an end-of-life desktop processor from Intel’s Skylake-X family, built on the 14 nm process node. It is a 10-core, 20-thread part with a base clock of 3.30 GHz and a boost clock of 4.20 GHz, targeting the high-end desktop segment. With an average benchmark score of 5022, it sits at the 63rd percentile of all CPUs, placing it in the upper-mid tier of performance despite its age. The data indicates a processor that remains competitive in multi-threaded workloads, though its single-thread performance and platform longevity are increasingly dated relative to modern alternatives.

Platform and Compatibility

The i9-9820X uses the Intel Socket 2066 platform, which is specific to the high-end desktop (HEDT) X-Series lineup. This socket supports the 9th generation Core i9 X-Series processors, and the chip is part of the Skylake-X architecture family. Memory support is limited to DDR4, but the platform features a quad-channel memory bus, providing a memory bandwidth of 85.3 GB/s. This is a significant advantage over mainstream desktop platforms, which typically use dual-channel memory, and the data suggests it benefits memory-intensive workloads such as large data sets and virtual machines. ECC memory is not supported, which is notable for users considering workstation duties that require error correction.

For expansion, the processor provides 44 PCIe Gen 3 lanes from the CPU itself. This is a high lane count, enabling multi-GPU configurations and multiple high-speed NVMe storage devices without needing a chipset to multiplex bandwidth. The upgrade path is limited, however, because the Socket 2066 platform is effectively end-of-life. Users are restricted to the existing X-Series 9th Gen lineup, and there is no forward compatibility with newer Intel sockets. The processor includes an unlocked multiplier, so overclocking is possible on compatible motherboards, but the platform’s age means buyers should consider whether they need the quad-channel memory and PCIe lane count, or whether a modern mainstream platform would suffice.

Power and Thermals

The i9-9820X carries a TDP rating of 165 watts, which places it in a high-power class. This is not a chip that can be cooled by a stock or low-profile cooler; the thermal load demands a robust solution. Benchmark data does not include specific thermal measurements, but the TDP class implies that users need at least a high-end air cooler or a substantial liquid cooling solution to maintain sustained boost clocks under load. The 14 nm process node is older and less efficient than newer nodes, so the 165 W TDP translates into significant heat output that must be managed by the chassis airflow and cooler design.

The unlocked multiplier means that overclocking will increase power draw and heat beyond the stock TDP. Given the platform’s age, the data suggests that users should verify their motherboard’s VRM capability and cooling solution before attempting to push the chip beyond its rated specifications. For a system builder, this processor effectively requires a power supply and cooling tier that is one step above what a typical 65 W or 105 W desktop processor would need. The thermal design is manageable, but it is not a casual drop-in upgrade for a standard office desktop; it belongs in a workstation or enthusiast chassis with strong thermal headroom.

Who Should Consider It

Benchmark results indicate that the i9-9820X is strongest in multi-threaded workloads. For example, it scores 1750 in Cinebench R15 multi-core and 7292 in Cinebench R20 multi-core, with a Cinebench R23 multi-core score of 17363. These numbers place it roughly in line with recent mid-range server and workstation chips, as shown by its nearest rivals. Users who run video rendering, 3D modeling, software compilation, or scientific simulations that utilize all 20 threads will see solid performance. The quad-channel memory bus and 44 PCIe lanes further support these workloads by enabling fast data movement and multiple accelerators.

Gaming performance is a mixed story. The single-core scores are 246 in Cinebench R15, 1029 in R20, and 2451 in R23. These are moderate figures, and the data shows that the chip lags behind newer architectures in single-threaded tasks. For gaming, the high core count is largely irrelevant, and the lower single-thread performance will be a bottleneck in titles that rely on a few fast cores. The platform’s high memory bandwidth may help in some simulation-heavy games, but overall, this is not an ideal gaming processor compared to modern mainstream options. Office productivity and general desktop use will be perfectly serviceable, but the power draw and platform cost are excessive for such tasks. This processor is best suited for content creators and professionals who need the core count and memory bandwidth, not for gamers or everyday users.

How It Compares

Against the Intel Xeon W-2150B, the i9-9820X is effectively a statistical tie. The Xeon W-2150B has an average score of 5014, and the i9-9820X is 0.2% ahead. This is within the margin of error, so the two processors are interchangeable in performance. The Xeon is a workstation part, but the benchmark data shows no meaningful advantage for either in average workloads.

The Intel Xeon Gold 6334 is a newer server chip with an average score of 5043, which puts the i9-9820X 0.4% behind. Again, this is a negligible difference. The Xeon Gold 6334 may have newer architectural features, but in the aggregate benchmark average, the i9-9820X holds its own. Users moving from one to the other should not expect a noticeable performance change in mixed workloads.

The AMD Ryzen 9 5980HS is a mobile processor with an average score of 4993, placing the i9-9820X 0.6% ahead. This is remarkable because the Ryzen 9 5980HS is a low-power laptop chip, yet it nearly matches the desktop i9-9820X in average performance. The data suggests that the i9-9820X’s advantage in multi-threaded tasks is offset by its weaker single-thread performance, bringing the averages close together.

The AMD Ryzen 7 PRO 5750GE has an average score of 5070, which puts the i9-9820X 0.9% behind. This is the largest delta among the listed rivals, but still small. The Ryzen 7 PRO 5750GE is a low-power desktop chip, and its success against the i9-9820X highlights how much efficiency and architecture have improved since the Skylake-X era.

Benchmark Performance

The benchmark results show a processor that scales well with multi-threaded loads but trails modern chips in single-threaded performance. In Cinebench R23, the i9-9820X scores 17363 multi-core and 2451 single-core. The multi-core score is respectable, but the single-core score is modest. For comparison, the nearest rivals are separated by less than 1% in average score, meaning the i9-9820X is not a clear winner or loser in any category; it sits squarely in a competitive cluster.

Looking at the delta percentages, the i9-9820X is 0.2% faster than the Xeon W-2150B, 0.4% slower than the Xeon Gold 6334, 0.6% faster than the Ryzen 9 5980HS, and 0.9% slower than the Ryzen 7 PRO 5750GE. These differences are all within a single percentage point, which is effectively noise in real-world usage. The data indicates that the i9-9820X performs equivalently to a range of processors from different generations and market segments, from server Xeons to mobile Ryzen chips.

The Cinebench R20 multi-core score of 7292 and R15 multi-core score of 1750 further reinforce this picture. The processor’s 10 cores and 20 threads provide solid parallel throughput, but the single-core scores of 1029 and 246 respectively show that it cannot compete with newer architectures that offer higher instructions per clock. For users who prioritize multi-threaded workloads, the i9-9820X remains a capable option, but its overall average score of 5022 and 63rd percentile ranking mean that many newer, lower-power chips can match or exceed it in a broad mix of tasks. The data suggests that while the i9-9820X is not obsolete, it is no longer competitive at the top of the performance stack, and its value now depends entirely on whether the specific workload benefits from its high core count and quad-channel memory bandwidth.