Intel Core i7-7820HK

Intel Core i7-7820HK is a 2017-era mobile processor that still holds a mid-pack position in the overall CPU landscape, landing at the 47th percentile of all CPUs tested. Its average benchmark score of 2047 places it in a dead heat with a cluster of desktop and mobile parts from the same generation, making it a competent but not class-leading option. The chip is end-of-life, so it is no longer a forward-looking purchase, but benchmark data shows it remains viable for everyday workloads and moderate multi-threaded tasks.

Platform and Compatibility

The Intel Core i7-7820HK is built on the Kaby Lake-H architecture and uses a 14 nm process node from Intel, with a die size of 126 mm². It is a mobile part, designated for the Intel BGA 1440 socket, which means it is permanently soldered to the motherboard and cannot be upgraded by the user. This is a critical compatibility constraint: the platform is closed, and the upgrade path is limited to replacing the entire system rather than swapping the processor.

Memory support includes both DDR3 and DDR4, running on a dual-channel memory bus. The processor does not support ECC memory, which aligns with its consumer-oriented mobile positioning. PCIe support is Gen 3 with 16 lanes available from the CPU, which is standard for a laptop processor of this class and sufficient for a discrete GPU and one or two NVMe drives. Integrated graphics are handled by Intel HD Graphics 630, so the chip can drive a display without a dedicated GPU, though gaming and heavy graphics work would rely on a separate graphics card.

The processor has 4 cores and 8 threads, with a base clock of 2.90 GHz and a boost clock of 3.90 GHz. The multiplier is unlocked, which is a notable feature for a mobile chip, allowing for overclocking in systems with adequate cooling. Cache is arranged as 64 KB of L1 per core, 256 KB of L2 per core, and 8 MB of shared L3 cache. The part number is SR32P, and it was released on January 2, 2017, with a launch MSRP of $378.

How It Compares

The i7-7820HK sits in an extremely tight competitive cluster, with all four nearest rivals within 0.2% of its average score. This indicates that, in aggregate benchmark performance, the differences are practically negligible, and real-world application behavior will be dictated more by thermal headroom, memory configuration, and platform features than by raw CPU throughput.

Intel Core i7-5775R: The i7-7820HK scores 0.1% lower than the i7-5775R, with the rival posting an average score of 2049 versus 2047. This is a statistical tie, but the 5775R is a desktop part with a different memory architecture, so the mobile i7-7820HK achieves comparable numbers in a thermally constrained laptop chassis. The delta is so small that neither chip holds a meaningful advantage in multi-threaded or single-threaded workloads.

Intel Core i7-7700T: The i7-7820HK is 0.1% ahead of the i7-7700T, which scores 2044. The 7700T is a low-power desktop chip with a similar core configuration, and the data shows they perform nearly identically on average. The i7-7820HK’s unlocked multiplier gives it a theoretical overclocking edge, but the benchmark scores reflect stock performance, where the two are indistinguishable.

Intel Xeon E3-1270 v5: The i7-7820HK leads the Xeon E3-1270 v5 by 0.2%, with the Xeon scoring 2043. The Xeon is a server-oriented part with no integrated graphics and a different platform ecosystem, yet its average score is essentially the same. For users comparing mobile to desktop workstation parts, the i7-7820HK offers comparable compute performance with the added benefit of integrated graphics, at the cost of being non-upgradeable.

Intel Xeon E-2124G: The i7-7820HK trails the Xeon E-2124G by 0.2%, as the rival scores 2052. This is the largest gap among the four rivals, but it remains under a fraction of a percent. The E-2124G is a newer desktop Xeon, yet the benchmark data shows no meaningful generational advantage in average score, reinforcing that the i7-7820HK’s performance profile is still competitive with newer entry-level workstation parts.

Who Should Consider It

The i7-7820HK is best suited for users who need a balanced mobile processor for everyday computing, office productivity, and light-to-moderate content creation. Its 4-core/8-thread configuration with a 3.90 GHz boost clock delivers solid responsiveness in single-threaded applications like web browsing, document editing, and spreadsheet work, where the Geekbench single-core score of 1273 and Cinebench R23 single-core score of 889 indicate strong per-core performance for its era.

For gaming, the processor is adequate but not ideal for high-refresh-rate scenarios with modern titles. The multi-core scores—Cinebench R23 multi-core at 6298 and Geekbench multi-core at 4173—suggest it can handle games that use multiple threads, but the 47th percentile ranking means it will lag behind contemporary desktop CPUs in CPU-bound gaming workloads. Users pairing this chip with a discrete GPU can expect playable framerates in most titles, but should not expect top-tier performance.

Content creation is a mixed bag. The Cinebench R20 multi-core score of 2645 and R15 multi-core score of 634 indicate that rendering tasks will complete, but slowly compared to modern multi-core parts. The i7-7820HK is a reasonable choice for users who occasionally edit photos or videos but primarily use their laptop for other tasks. It is not suitable for professional-grade 3D rendering or heavy video encoding, where the lack of cores and threads becomes a bottleneck.

FAQ

Q: What socket does the Intel Core i7-7820HK use?

A: The processor uses the Intel BGA 1440 socket, which is a soldered, non-upgradeable mobile socket.

Q: Does the i7-7820HK support ECC memory?

A: No, ECC memory is not supported. The chip supports DDR3 and DDR4 memory in a dual-channel configuration.

Q: What is the boost clock speed of the i7-7820HK?

A: The boost clock is 3.90 GHz, while the base clock is 2.90 GHz.

Q: Is the multiplier unlocked on the i7-7820HK?

A: Yes, the multiplier is unlocked, which allows for overclocking in compatible systems with adequate cooling.

Q: What integrated graphics does the i7-7820HK include?

A: It includes Intel HD Graphics 630, which provides basic display output without a discrete GPU.

Q: How does the i7-7820HK compare to the Intel Core i7-7700T?

A: The i7-7820HK is 0.1% ahead of the i7-7700T in average benchmark score, making them effectively equal in performance.

Benchmark Performance

The benchmark data shows a consistent performance profile across multiple testing suites. In Cinebench R23, the i7-7820HK scores 6298 in multi-core and 889 in single-core. The multi-core score is approximately 7.1 times the single-core score, which is expected for a 4-core/8-thread part with a 3.90 GHz boost clock. In Cinebench R20, the scores are 2645 multi-core and 373 single-core, while in R15 they are 634 multi-core and 89 single-core. The scaling across these versions is consistent, with newer versions placing more stress on the memory subsystem and instruction set optimizations.

Geekbench scores are 4173 multi-core and 1273 single-core. The ratio between multi-core and single-core is 3.28, which is lower than the Cinebench ratio because Geekbench includes memory and other subsystem tests that do not scale purely with core count. The average benchmark score of 2047 places the chip at the 47th percentile of all CPUs, meaning it outperforms roughly half of the tested processors, but it is far from the top tier.

Relative to its nearest rivals, the i7-7820HK is statistically tied with all four. The deltaPct values range from -0.2% to 0.2%, with the Xeon E-2124G being the fastest at 2052 and the Xeon E3-1270 v5 the slowest at 2043. The i7-7820HK’s own score of 2047 sits squarely in the middle of this group. No rival is more than 0.2% away, which means that in any given application, the winner would vary run-to-run. The data does not support a claim of superiority for any single part in this cluster.

Single-Thread vs Multi-Thread Behavior

The i7-7820HK demonstrates a balanced split between single-thread and multi-thread performance. In Cinebench R23, the single-core score of 889 represents a strong result for a 2017 mobile chip, indicating that the 3.90 GHz boost clock is effective at driving latency-sensitive workloads. The multi-core score of 6298 is roughly seven times the single-core score, which is the expected scaling for a 4-core processor with Hyper-Threading. This means that applications that rely on a single thread—such as older games, spreadsheet calculations, and many office applications—will see near-maximum performance from the boost clock.

In multi-threaded workloads, the chip scales predictably but does not surprise. The Cinebench R20 multi-core score of 2645 is in line with other 4-core/8-thread parts from the same era. The Geekbench multi-core score of 4173 is lower than the Cinebench ratio would suggest, which is due to Geekbench’s broader mix of tests that include memory latency and bandwidth. For real-world use, this means the i7-7820HK handles multi-tasking and parallel workloads competently but will not excel in heavily threaded tasks like video encoding or 3D rendering, where newer 8-core or 12-core parts pull far ahead.

The single-thread advantage is more pronounced relative to its position. At the 47th percentile overall, the i7-7820HK’s single-core performance is likely higher than its multi-core percentile, given that the boost clock of 3.90 GHz is competitive with many desktop parts. This makes the chip a better fit for users who prioritize snappy, responsive applications over raw throughput in parallel tasks.

Power and Thermals

The i7-7820HK has a 45 W TDP, which classifies it as a standard-performance mobile processor rather than a low-power or ultra-high-performance part. This TDP is typical for a 4-core/8-thread laptop CPU from the Kaby Lake-H generation, allowing for sustained multi-core loads without excessive thermal throttling in a well-designed chassis. The 14 nm process node helps keep power draw manageable, but the unlocked multiplier means that overclocking can push power consumption well beyond the 45 W TDP if the cooling solution allows.

For cooling, the 45 W TDP implies that a capable air cooler or a modest heatpipe-and-fan solution is sufficient for stock operation. Laptops with this chip typically feature dual-fan designs or larger vapor chambers to handle the heat output, especially under sustained all-core loads. The boost clock of 3.90 GHz is achievable on a single core without significant thermal strain, but maintaining that clock across all cores for extended periods would require robust cooling. Users who plan to overclock this chip should ensure their laptop has an aggressive thermal solution, as the 45 W TDP is only a baseline and overclocking can increase heat output substantially.

The integrated HD Graphics 630 adds a small amount of thermal load, but it is negligible compared to the CPU cores. For users who run the processor at stock settings, the 45 W TDP is manageable in most gaming laptops and mobile workstations from the era. The chip’s end-of-life status means that replacement parts and cooling solutions may be harder to source, but for existing systems, the thermal profile is well understood and adequately handled by the original equipment manufacturers.