Intel Core i7-7740X

The Intel Core i7-7740X is a desktop processor from Intel’s Core i7 X-Series 7th Gen lineup, built on the Kaby Lake architecture and the Kaby Lake-X codename. It is a 4-core, 8-thread part with a base clock of 4.30 GHz and a boost clock of 4.60 GHz, manufactured on Intel’s 14 nm process node. The chip posts an average benchmark score of 2639, placing it at the 52nd percentile among all CPUs tested, which puts it squarely in the middle of the performance distribution. Its scores across Cinebench R15, R20, R23, and Geekbench show a consistent pattern: strong single-threaded capability for a 4-core part, but multi-threaded results that are tightly clustered with a set of very close rivals. The following analysis breaks down how this chip positions itself against those nearest competitors, its power requirements, benchmark deltas, and platform fit.

How It Compares

The closest rival by average score is the Intel Core i7-5820K, which scores 2640 compared to the 7740X’s 2639, a delta of 0%. These two processors are effectively performance twins in aggregate benchmarks, though they come from different eras and core configurations. The 5820K offers more physical cores, but the 7740X’s higher clocks and newer architecture compensate almost exactly, resulting in a statistical dead heat across the mixed benchmark suite.

Next up is the Intel Core i7-8700T, which scores 2636, a delta of 0.1% in favor of the 7740X. The 8700T is a lower-power, higher-core-count part, and the data shows that the 7740X edges it out by a negligible margin. In practical terms, this is a rounding error — the two chips will trade blows depending on the specific workload, but the aggregate average tells users they should expect near-identical overall throughput.

On the other side, the Intel Xeon E-2274G scores 2645, which is 0.2% higher than the 7740X’s 2639. That is a slight but consistent lead for the Xeon, which is a workstation-oriented part with similar core and thread counts. The 7740X trails by a hair in the overall average, meaning the Xeon holds a marginal performance advantage that would be difficult to notice outside of tightly controlled benchmarks.

The AMD Ryzen 5 4500U scores 2647, a 0.3% advantage over the 7740X. This is the largest delta among the nearest rivals, yet still remarkably small. The Ryzen 5 is a mobile-focused processor, and its ability to match a desktop Kaby Lake-X chip in aggregate scores highlights how competitive the mid-range landscape has become. The 7740X is effectively tied with all four rivals, with deltas ranging from -0.3% to +0.1%.

Power and Thermals

The Intel Core i7-7740X carries a TDP of 112 watts, which classifies it as a moderately power-hungry desktop part. This TDP figure is typical for a Kaby Lake-X processor that is designed for enthusiast platforms, and it implies a cooling solution beyond a basic stock cooler. A capable air cooler with a large heatsink or a compact liquid cooler would be appropriate to maintain sustained boost clocks under load, especially given the 4.60 GHz boost clock.

The 112-watt TDP also indicates that the chip is not intended for slim or low-profile builds. Users should plan for adequate case airflow and a tower-style cooler at minimum. The thermal density of a 4-core die running at high clocks means that heat dissipation is concentrated, so a cooler with a solid mounting system and good airflow over the socket area is recommended. The data does not specify a bundled cooler, so the cooling solution is left entirely to the buyer.

For overclocking, the multiplier is unlocked, which means users can push the chip beyond its stock 4.30 GHz base and 4.60 GHz boost clocks. However, doing so will increase power draw and heat output beyond the 112-watt TDP, requiring a beefier thermal solution. The 14 nm process node is mature, but the high clock speeds already near the limits of that node, so headroom will vary by silicon quality.

Benchmark Performance

The benchmark data reveals a processor that excels in single-threaded workloads relative to its multi-threaded results. In Cinebench R15, the 7740X scores 827 for multicore and 116 for singlecore. The single-core score of 116 is strong for a 4-core part, reflecting the high 4.60 GHz boost clock. The multicore score of 827 is respectable but not class-leading, as the 4-core/8-thread configuration limits scalability in heavily threaded tasks.

Moving to Cinebench R20, the multicore score is 3447 and the singlecore score is 486. The R20 multicore figure shows a 4.16x scaling factor from singlecore, which is close to the theoretical maximum for 4 cores with 8 threads, indicating efficient utilization. The singlecore score of 486 is competitive with newer parts, though the overall multicore result is constrained by the core count.

In Cinebench R23, the multicore score jumps to 8209, while the singlecore score is 1158. The R23 multicore result is notably higher in absolute terms than R20, due to the longer workload duration and different scoring scale. The singlecore score of 1158 is a strong showing, and the multicore-to-singlecore ratio of 7.09x demonstrates that the chip scales well across its 8 threads, though it cannot match higher-core-count rivals in absolute multicore throughput.

Geekbench results show a multicore score of 5246 and a singlecore score of 1619. The singlecore Geekbench score is excellent, placing the chip near the top of the pack for its generation. The multicore score of 5246 is moderate, and when compared to the nearest rivals, the 7740X’s average benchmark score of 2639 is within 0.3% of all four competitors. Specifically, it is 0.1% ahead of the i7-8700T, 0.2% behind the Xeon E-2274G, and 0.3% behind the Ryzen 5 4500U. These deltas are minuscule, meaning real-world application performance will be indistinguishable in most scenarios.

Platform and Compatibility

The Intel Core i7-7740X uses the Intel Socket 2066, which places it on the high-end desktop (HEDT) platform. This socket supports quad-channel DDR4 memory, a significant advantage over mainstream platforms that typically use dual-channel memory. The memory bus is quad-channel, which can improve bandwidth in memory-intensive workloads, though the 7740X’s 4-core design may not fully exploit this capability compared to higher-core-count HEDT parts.

Memory support is DDR4, with no ECC capability, so users looking for error-correcting memory must look elsewhere. The chip does not include integrated graphics, meaning a discrete GPU is mandatory for any display output. PCIe support is Gen 3, which is standard for the era, and the platform provides adequate lanes for a single high-end GPU or multiple GPUs, though the exact lane count is not specified in the data.

The production status is listed as Active, so the chip is still in the market. The release date is June 25, 2017, which makes it a mature product. The multiplier is unlocked, allowing for overclocking. The platform’s upgrade path is limited to other Socket 2066 parts, but the 7th Gen X-Series lineup is not the latest, so users building new systems may find fewer options compared to more modern sockets. The quad-channel memory support is a differentiator, but the 4-core configuration is unusual for an HEDT platform, which typically features 6 or more cores.

FAQ

Q: How does the Core i7-7740X compare to the Intel Core i7-5820K?

A: The two processors have nearly identical average benchmark scores, with the i7-5820K scoring 2640 and the 7740X scoring 2639, resulting in a 0% delta. They are effectively tied in aggregate performance.

Q: What is the TDP of this processor and what cooling does it need?

A: The TDP is 112 watts. This requires a capable air cooler or a compact liquid cooler to manage heat, especially under sustained loads or when overclocking, since the multiplier is unlocked.

Q: What memory configuration does the Socket 2066 platform support for this chip?

A: The chip supports DDR4 memory over a quad-channel bus. This is a quad-channel memory controller, which is a key feature of the HEDT platform, though ECC memory is not supported.

Q: Does the Core i7-7740X have integrated graphics?

A: No, the processor has no integrated graphics. A discrete GPU is required for any video output.

Q: What are the single-core and multi-core scores in Cinebench R23?

A: The multi-core score is 8209 and the single-core score is 1158. The multi-core result shows a roughly 7x scaling from single-core, reflecting the 4-core/8-thread design.

Q: How close is the 7740X to its nearest rival, the AMD Ryzen 5 4500U?

A: The Ryzen 5 4500U scores 2647, which is 0.3% higher than the 7740X’s 2639. This is the largest delta among the four nearest rivals, but still a negligible difference in real-world terms.