Core i9-7940X

Details and Benchmarks for Intel Core i9-7940X

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 i9-7940X based on all benchmark results gathered. Look at this like a meta score, you will find more specific workload ratings below.

6,299 Rank: 151
Rank Name Score Visual
147 EPYC 7451 6,304
+0.1%
148 Core i9-9920X 6,303
+0.1%
149 Xeon Gold 6348 6,303
+0.1%
150 EPYC 7502P 6,301
+0%
151 Core i9-7940X 6,299
152 Ryzen 7 5800X 6,296
+-0%
153 Core i9-13900H 6,295
-0.1%
154 Xeon E-2386G 6,289
-0.2%
155 Xeon Gold 6426Y 6,288
-0.2%
156 Ryzen 7 5800X3D 6,284
-0.2%

View full ranking →

Multicore Score

Multicore performance score for Core i9-7940X based on multi-threaded benchmark results.

6,614 Rank: 141
Rank Name Score Visual
137 Xeon W-3245 6,648
+0.5%
138 Ryzen AI 9 HX 370 6,646
+0.5%
139 EPYC 7452 6,644
+0.5%
140 Xeon Gold 6346 6,634
+0.3%
141 Core i9-7940X 6,614
142 Ryzen 7 PRO 7745 6,604
-0.2%
143 Xeon Gold 6138T 6,596
-0.3%
144 Core i9-12900 6,585
-0.4%
145 Ryzen 9 3900X 6,572
-0.6%
146 Ryzen 9 5950X 6,571
-0.7%

View full ranking →

Singlecore Score

Single-core performance score for Core i9-7940X based on single-threaded benchmark results.

6,089 Rank: 237
Rank Name Score Visual
233 Core i9-9900T 6,106
+0.3%
234 Ryzen 7 6800H 6,105
+0.3%
235 Ryzen Threadripper 3970X 6,102
+0.2%
236 AMD Ryzen 3 1200 6,093
+0.1%
237 Core i9-7940X 6,089
238 Core i5-8600K 6,088
+-0%
239 Ryzen 5 5600G 6,087
+-0%
240 Ryzen 9 5900HX 6,087
+-0%
241 Ryzen 9 3900 6,087
+-0%
242 Ryzen 5 3600XT 6,080
-0.1%

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 i9-7940X based on integer math, floating point math, and prime number computation benchmarks.

5,377 Rank: 216
Rank Name Score Visual
212 Ryzen 7 5700X 5,388
+0.2%
213 Core Ultra 7 258V 5,387
+0.2%
214 Core i7-12700H 5,382
+0.1%
215 Ryzen 7 7840HS 5,381
+0.1%
216 Core i9-7940X 5,377
217 Ryzen 7 8845HS 5,375
+-0%
218 Xeon Gold 5317 5,373
-0.1%
219 Core i9-10920X 5,371
-0.1%
220 Xeon E5-2673 v4 5,363
-0.3%
221 EPYC 7351P 5,362
-0.3%

View full ranking →

Data Processing

Aggregated score for Core i9-7940X based on data encryption, data compression, and string sorting benchmarks.

5,532 Rank: 195
Rank Name Score Visual
191 Ryzen 7 8845HS 5,544
+0.2%
192 EPYC 7272 5,543
+0.2%
193 Ryzen AI 9 365 5,540
+0.1%
194 Ryzen 7 7840HS 5,536
+0.1%
195 Core i9-7940X 5,532
196 Xeon Gold 6140 5,528
-0.1%
197 Xeon Gold 6242 5,519
-0.2%
198 Ryzen 7 5800XT 5,518
-0.3%
199 Xeon Gold 6142 5,511
-0.4%
200 Core Ultra 9 185H 5,507
-0.5%

View full ranking →

Physics & Compute

Aggregated score for Core i9-7940X based on physics simulation and extended instruction set (SSE/AVX) benchmarks.

5,565 Rank: 170
Rank Name Score Visual
166 Ryzen 7 7745HX 5,581
+0.3%
167 Xeon Gold 6152 5,571
+0.1%
168 Xeon Gold 6142M 5,569
+0.1%
169 Ryzen 9 PRO 5945 5,566
+0%
170 Core i9-7940X 5,565
171 Ryzen 7 8700G 5,563
+-0%
172 Xeon W-3235 5,553
-0.2%
173 Ryzen 7 8700F 5,545
-0.4%
174 Xeon Gold 6142 5,544
-0.4%
175 EPYC 7451 5,541
-0.4%

View full ranking →

Core i9-7940X Details

The Intel Core i9-7940X stands as a high-end desktop processor from the Skylake-X generation, launched in September 2017 with an original MSRP of $1399. Though now over six years old, it remains a powerful option for demanding workloads, particularly due to its 14-core, 28-thread architecture and support for AVX-512 instructions. Built on Intel's 14 nm process and housed in the FCLGA-2066 package, this CPU targets enthusiasts and professionals requiring extreme multi-threaded performance, with a TDP of 165 W demanding robust cooling solutions. While no longer cutting-edge, its capabilities still place it among top-tier processors in multi-core performance benchmarks.

In terms of raw performance, the Core i9-7940X achieves a Passmark Overall Score of 6299, ranking #151 out of 2060 processors, and a Multicore Score of 6614, placing it at #141 of 2060. Its Singlecore Score of 6089 lands at #237, indicating that while it excels in parallel workloads, it lags behind more modern single-core performers. The processor is particularly strong in multicore scenarios, outperforming many mainstream and even some enthusiast CPUs such as the Ryzen 7 5800X and Core i9-13900H. Its performance is comparable to high-end Xeon and Ryzen Threadripper parts, including the Xeon Gold 6346 and Ryzen 7 PRO 7745, though it falls short of the latest generation processors like the Ryzen 9 9950X or Core Ultra 9 285K.

The Core i9-7940X operates at a base frequency of 3.1 GHz and can boost up to 4.4 GHz under optimal conditions, leveraging Intel's Turbo Boost Max Technology 3.0. It features 19.25 MB of L3 cache, 14 MB of L2 cache, and 0.875 MB of L1 cache, providing substantial data throughput for complex applications. The processor supports up to 131 GB of DDR4-2666 memory across four channels, with a maximum bandwidth of 79.47 GB/s. It also supports PCIe 3.0 with up to 44 lanes, enabling fast storage and expansion capabilities. Despite its advanced features, the lack of integrated graphics necessitates a discrete GPU for any display output.

Notable features include support for AVX-512, AES-NI, and Intel VT-x, along with Simultaneous Multithreading (SMT), which effectively doubles core efficiency. The unlocked multiplier allows for extensive overclocking, making it a favorite among overclockers. However, its age and high power consumption limit its appeal in modern builds where newer, more efficient CPUs offer better performance per watt. As of March 2026, the Core i9-7940X remains relevant for legacy systems and niche workloads but is increasingly overshadowed by more recent offerings from both Intel and AMD.
Frequently Compared

AMD Phenom II X3 705e 10 views

AMD Ryzen 9 7900X3D 9 views

Intel Pentium P6200 9 views

AMD Ryzen Threadripper PRO 9955WX 8 views

AMD Ryzen 9 8945HS 8 views

Intel Xeon Gold 5317 7 views

Intel Pentium E6300 7 views

Intel Celeron B800 7 views

AMD Ryzen 5 1600 7 views

Intel Celeron 2980U 5 views

Intel Core i9-7940X

Main Specifications

Designer: Intel
Name: Core i9-7940X
Family: Core
Series: i9-7900
Model Number: i9-7940X
Cores: 14
Threads: 28
Base Frequency: 3100 MHz
Turbo Frequency (1 core): 4300 MHz
Turbo Frequency (2 cores): 4300 MHz
Clock Multiplier: 31x (unlocked)
Microarchitecture: Skylake
Core Name: Skylake
Core Family: 6
Core Model: 85
Socket: Socket
Package: FCLGA-2066
Chipset: Lewisburg
Target Segment: Desktop
Max CPUs: 1
TDP: 165 W
Release Price: $1,399.00

Cache Specifications

L1 Cache: 896 KiB
L1 Instruction Cache: 448.512 KiB (8-way set associative)
L1 Data Cache: 448.512 KiB (8-way set associative)
L2 Cache: 14 MiB (16-way set associative)
L3 Cache: 19.25 MiB (11-way set associative)

Memory Specifications

Supported Memory Type: DDR4-2666
Memory Channels: 4
Maximum Memory: 128 GB
Maximum Bandwidth: 79.47 GB/s
ECC Support: No

PCI-Express Specifications

PCIe Revision: 3.0
PCIe Lanes: 44
PCIe Configuration: x16, x8, x4

Physical Specifications

Process: 14 nm
Die Area: 484 mm²
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 AVX-512 AVX512F AVX512CD AVX512BW AVX512DQ AVX512VL TSX Flex Memory AVX-512 TBMT 3.0 TBT 1.0 FMA
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