Core i7-7740X

Details and Benchmarks for Intel Core i7-7740X

Sysbuilds Alpha Stage!

Please take all results with a big grain of salt. Sysbuilds is in alpha stage at the moment which can lead to wrong data, strange counting errors, silly results and more. This site is under active development.

Benchmark Results

Combined benchmark scores based on multiple data points, giving a quick overview of this processor's performance.

Overall Score

Overall score for Core i7-7740X based on all benchmark results gathered. Look at this like a meta score, you will find more specific workload ratings below.

5,522 Rank: 467
Rank Name Score Visual
463 Xeon Gold 6152 5,524
+0%
464 Core i7-7700 5,524
+0%
465 Ryzen 3 5425U 5,524
+0%
466 Xeon Gold 6136 5,523
+0%
467 Core i7-7740X 5,522
468 Xeon E5-1650 0 5,522
+0%
469 Ryzen 7 2800H 5,521
+-0%
470 Xeon Gold 6132 5,517
-0.1%
471 Core i5-10400H 5,515
-0.1%
472 FX-9370 5,511
-0.2%

View full ranking →

Multicore Score

Multicore performance score for Core i7-7740X based on multi-threaded benchmark results.

4,874 Rank: 761
Rank Name Score Visual
757 Core i5-4690K 4,877
+0.1%
758 Xeon E5-1620 v2 4,877
+0.1%
759 Core i5-4690 4,876
+0%
760 Ryzen 5 PRO 3500U 4,875
+0%
761 Core i7-7740X 4,874
762 Core i7-3840QM 4,874
+0%
763 Core i7-1185GRE 4,874
+0%
764 Ryzen 7 3750H 4,871
-0.1%
765 Xeon E5-2643 v2 4,871
-0.1%
766 Ryzen 3 5300U 4,871
-0.1%

View full ranking →

Singlecore Score

Single-core performance score for Core i7-7740X based on single-threaded benchmark results.

5,954 Rank: 291
Rank Name Score Visual
287 Ryzen 3 PRO 5475U 5,957
+0.1%
288 Ryzen 7 5800H 5,956
+0%
289 Ryzen 7 PRO 7730U 5,956
+0%
290 Ryzen 7 7735U 5,955
+0%
291 Core i7-7740X 5,954
292 Ryzen 3 3300X 5,951
-0.1%
293 Core i7 880 5,948
-0.1%
294 Ryzen 7 PRO 5875U 5,948
-0.1%
295 Core i5-7600K 5,947
-0.1%
296 Xeon E3-1285 v6 5,939
-0.3%

View full ranking →

Workload Scores

Performance scores grouped by workload type, normalized and aggregated from multiple raw benchmark results.

Number Crunching

Aggregated score for Core i7-7740X based on integer math, floating point math, and prime number computation benchmarks.

4,749 Rank: 581
Rank Name Score Visual
577 Xeon E3-1285 v4 4,755
+0.1%
578 Core i5-1145G7 4,754
+0.1%
579 Xeon E-2234 4,752
+0.1%
580 Core i7-5775C 4,751
+0%
581 Core i7-7740X 4,749
582 Core i7-3970X 4,749
+0%
583 Xeon E-2244G 4,748
+-0%
584 Xeon E-2174G 4,747
+-0%
585 Core i7-7700K 4,747
+-0%
586 Core i5-8500B 4,746
-0.1%

View full ranking →

Data Processing

Aggregated score for Core i7-7740X based on data encryption, data compression, and string sorting benchmarks.

4,779 Rank: 573
Rank Name Score Visual
569 Core i5-9600 4,789
+0.2%
570 Ryzen 7 3750H 4,781
+0%
571 Ryzen 3 7320U 4,781
+0%
572 Core i5-8600K 4,780
+0%
573 Core i7-7740X 4,779
574 Core i7-7700K 4,779
+0%
575 Xeon E-2126G 4,776
-0.1%
576 Core i5-8600 4,776
-0.1%
577 Core i5-9500F 4,775
-0.1%
578 Xeon W-2125 4,775
-0.1%

View full ranking →

Physics & Compute

Aggregated score for Core i7-7740X based on physics simulation and extended instruction set (SSE/AVX) benchmarks.

4,826 Rank: 538
Rank Name Score Visual
534 Ryzen 7 PRO 1700 4,831
+0.1%
535 Core i7-9750H 4,829
+0.1%
536 Core i7-8559U 4,828
+0%
537 Xeon E3-1545M v5 4,828
+0%
538 Core i7-7740X 4,826
539 Xeon E-2174G 4,826
+0%
540 Core i9-8950HK 4,825
+-0%
541 Ryzen 3 PRO 5350GE 4,825
+-0%
542 Xeon E-2144G 4,824
+-0%
543 Core i7-7700K 4,822
-0.1%

View full ranking →

Core i7-7740X Details

The Intel Core i7-7740X is designed for enthusiasts and desktop users who demand high single-core performance without the need for integrated graphics. Launched in June 2017, this processor is part of Intel’s X-Series lineup, built on the Kaby Lake microarchitecture and fabricated on a 14 nm process. Despite its age, the i7-7740X remains relevant for applications where raw single-threaded speed is more critical than modern multi-core scalability. It is particularly suited for content creation, gaming, and overclocking due to its unlocked multiplier and high clock speeds.

The Core i7-7740X features four cores and eight threads, enabled by Intel’s Hyper-Threading technology, allowing it to handle demanding multitasking workloads efficiently. It operates at a base frequency of 4.3 GHz, with a turbo frequency reaching up to 4.5 GHz across all four cores. This high clock speed is supported by 8 MB of L3 cache and 1 MiB of L2 cache, with 0.125 MiB of L1 cache per core. The processor uses a quad-channel DDR4-2666 memory interface, delivering a maximum memory bandwidth of 39.74 GiB/s, and supports up to 64 GB of RAM. It is built for the FCLGA-2066 socket, also known as Socket R4, and includes support for PCIe 3.0 with 16 lanes.

Notably, the i7-7740X does not include integrated graphics, requiring a discrete GPU for display output. However, it supports a range of advanced features, including Intel Turbo Boost 2.0, Enhanced SpeedStep Technology, and hardware virtualization via Intel VT-x and VT-d. It also includes support for AVX, AVX2, AES-NI, and other instruction sets that enhance performance in encryption, multimedia, and scientific computing. The processor has a TDP of 112 W, which necessitates a robust cooling solution, especially under sustained loads or during overclocking.

In benchmark testing, the Core i7-7740X achieves an overall score of 5522, placing it at #467 of 2060 processors. Its single-core score of 5954 ranks it #291, showcasing its strong performance in applications that rely heavily on individual core speed. In contrast, its multicore score of 4874 places it at #761, indicating that while it performs well in multi-threaded tasks, it is outpaced by modern high-core-count processors. The processor is competitive with older mainstream CPUs like the Core i5-6600 and Ryzen 3 5300U, but trails behind modern high-end offerings.

As of March 2026, the Core i7-7740X occupies a niche position in the market—ideal for users upgrading older systems or building cost-effective, high-frequency desktops for gaming or productivity. While it lacks the efficiency and multi-core performance of modern CPUs, its strong single-core capabilities and overclocking potential make it a compelling choice for enthusiasts willing to trade modern features for raw clock speed.
Frequently Compared

AMD Ryzen 3 PRO 2200GE 2 views

AMD Ryzen 9 PRO 3900 2 views

AMD Ryzen 5 PRO 3500U 2 views

AMD Ryzen Threadripper 3970X 1 view

Intel Core i7-7740X

Main Specifications

Designer: Intel
Name: Core i7-7740X
Family: Core
Series: i7-7700
Model Number: i7-7740X
Cores: 4
Threads: 8
Base Frequency: 4300 MHz
Turbo Frequency (1 core): 4500 MHz
Turbo Frequency (2 cores): 4500 MHz
Turbo Frequency (3 cores): 4500 MHz
Turbo Frequency (4 cores): 4500 MHz
Clock Multiplier: 43x (unlocked)
Microarchitecture: Kaby Lake
Core Name: Kaby Lake X
Core Family: 6
Core Model: 158
Socket: Socket
Package: FCLGA-2066
Chipset: Lewisburg
Target Segment: Desktop
Max CPUs: 1
TDP: 112 W
Release Price: $339.00

Cache Specifications

L1 Cache: 256 KiB
L1 Instruction Cache: 128 KiB (8-way set associative)
L1 Data Cache: 128 KiB (8-way set associative)
L2 Cache: 1 MiB (4-way set associative)
L3 Cache: 8 MiB

Memory Specifications

Supported Memory Type: DDR4-2666
Memory Channels: 2
Maximum Memory: 64 GB
Maximum Bandwidth: 39.74 GB/s
ECC Support: No

Physical Specifications

Process: 14 nm
Manufacturer: Intel
Technology: CMOS
Word Size: 64-bit
ISA: x86-64 (x86)

CPU Features

MMX EMMX SSE SSE2 SSE3 SSSE3 SSE4.1 SSE4.2 AVX AVX2 ABM BMI1 BMI2 FMA3 AES RdRand ADX CLMUL F16C x86-16 x86-32 x86-64 Real Protected SMM FPU NX HT TBT 2.0 EIST TXT VT-x VT-d EPT MPX SGX TSX TBT 1.0
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