Core i9-9940X

Details and Benchmarks for Intel Core i9-9940X

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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 i9-9940X based on all benchmark results gathered. Look at this like a meta score, you will find more specific workload ratings below.

6,414 Rank: 132
Rank Name Score Visual
128 Xeon Gold 6438Y+ 6,433
+0.3%
129 Xeon W-1390P 6,432
+0.3%
130 Core i9-11900K 6,428
+0.2%
131 Ryzen 7 7840HS 6,427
+0.2%
132 Core i9-9940X 6,414
133 Ryzen Threadripper 2990WX 6,400
-0.2%
134 Core i9-10920X 6,392
-0.3%
135 Xeon Silver 4416+ 6,388
-0.4%
136 Xeon E-2388G 6,362
-0.8%
137 Ryzen 7 PRO 5845 6,349
-1%

View full ranking →

Multicore Score

Multicore performance score for Core i9-9940X based on multi-threaded benchmark results.

6,781 Rank: 122
Rank Name Score Visual
118 Ryzen 5 9600X 6,792
+0.2%
119 Ryzen 7 7700X 6,791
+0.1%
120 Ryzen Threadripper PRO 5945WX 6,790
+0.1%
121 Xeon Gold 5418Y 6,786
+0.1%
122 Core i9-9940X 6,781
123 Core Ultra 9 285H 6,778
+-0%
124 Core i9-10920X 6,741
-0.6%
125 Xeon Gold 6426Y 6,725
-0.8%
126 Core i9-12900F 6,718
-0.9%
127 Ryzen AI 9 HX 375 6,715
-1%

View full ranking →

Singlecore Score

Single-core performance score for Core i9-9940X based on single-threaded benchmark results.

6,170 Rank: 209
Rank Name Score Visual
205 Xeon E-2174G 6,197
+0.4%
206 Core i9-7920X 6,197
+0.4%
207 Ryzen 5 5600 6,186
+0.3%
208 Ryzen 3 PRO 5350GE 6,173
+0%
209 Core i9-9940X 6,170
210 Core 5 120U 6,170
+0%
211 Ryzen 7 3800XT 6,166
-0.1%
212 Core i7-7700K 6,165
-0.1%
213 Core i5-9600KF 6,161
-0.1%
214 Core i9-10920X 6,160
-0.2%

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 i9-9940X based on integer math, floating point math, and prime number computation benchmarks.

5,466 Rank: 189
Rank Name Score Visual
185 Xeon E5-4669 v4 5,476
+0.2%
186 Xeon Gold 6240 5,472
+0.1%
187 Core i9-7960X 5,470
+0.1%
188 Xeon W-2191B 5,468
+0%
189 Core i9-9940X 5,466
190 Core i9-10940X 5,463
-0.1%
191 Core i9-13900H 5,463
-0.1%
192 Ryzen 7 8700G 5,460
-0.1%
193 Xeon Platinum 8124M 5,458
-0.1%
194 Ryzen 7 8700F 5,444
-0.4%

View full ranking →

Data Processing

Aggregated score for Core i9-9940X based on data encryption, data compression, and string sorting benchmarks.

5,654 Rank: 171
Rank Name Score Visual
167 Xeon Silver 4314 5,660
+0.1%
168 Ryzen 7 7745HX 5,660
+0.1%
169 Xeon Gold 6150 5,657
+0.1%
170 Ryzen 7 8700F 5,657
+0.1%
171 Core i9-9940X 5,654
172 Core i9-7960X 5,649
-0.1%
173 EPYC 7281 5,647
-0.1%
174 Xeon W-2195 5,646
-0.1%
175 Core Ultra 9 285H 5,645
-0.2%
176 Core i5-13500 5,631
-0.4%

View full ranking →

Physics & Compute

Aggregated score for Core i9-9940X based on physics simulation and extended instruction set (SSE/AVX) benchmarks.

5,650 Rank: 150
Rank Name Score Visual
146 Xeon W-3245M 5,657
+0.1%
147 Ryzen 7 PRO 7745 5,657
+0.1%
148 Core i9-9990XE 5,655
+0.1%
149 Core i9-7960X 5,653
+0.1%
150 Core i9-9940X 5,650
151 EPYC 7601 5,650
+0%
152 Core Ultra 7 255H 5,649
+-0%
153 Xeon W-2195 5,640
-0.2%
154 Xeon Gold 6150 5,639
-0.2%
155 Xeon Gold 6252 5,635
-0.3%

View full ranking →

Core i9-9940X Details

The Intel Core i9-9940X occupies a niche within the high-end desktop processor landscape, positioned as a flagship offering in Intel's X-Series lineup from the 9th generation. Launched in October 2018, it represents a mature iteration of the Skylake-X architecture, designed for enthusiasts and professionals demanding extreme multi-core performance. While it is now considered an older platform by modern standards, its specifications still hold relevance for specific use cases requiring high core counts and robust memory bandwidth.

At the heart of the Core i9-9940X is a 14-core, 28-thread processor built on a 14 nm manufacturing process. It features a base clock of 3.3 GHz and can boost up to 4.4 GHz on a single core, with a maximum turbo frequency of 4.4 GHz across two cores. This is supported by a substantial 19.25 MB of L3 cache and 14 MB of L2 cache, ensuring low-latency access to frequently used data. The processor operates at a TDP of 165 W, indicating significant power consumption and thermal output, necessitating an advanced cooling solution for sustained performance.

The Core i9-9940X is designed for the FCLGA-2066 socket, commonly known as Socket R4, and is compatible with the Lewisburg chipset. It supports quad-channel DDR4-2666 memory, providing a maximum memory bandwidth of 79.47 GB/s. This high bandwidth is crucial for data-intensive applications such as video editing, 3D rendering, and scientific simulations. The processor also includes support for advanced instruction sets like AVX-512, AVX2, and AES-NI, enhancing performance in computational tasks.

Despite its powerful core configuration, the Core i9-9940X lacks integrated graphics, requiring a discrete GPU for visual output. This design choice emphasizes its role as a pure compute processor, targeting users who already have dedicated graphics hardware. The absence of integrated graphics also contributes to the processor's high power efficiency in terms of raw processing power, though it demands additional investment in a graphics card.

In benchmark testing, the Core i9-9940X achieves an overall score of 6,414, ranking it #132 among 2,060 processors. Its single-core performance scores 6,170, placing it #209, while its multicore score reaches 6,781, ranking #122. These results place it behind newer processors like the Ryzen Threadripper PRO 5945WX and the Core i9-11900K but ahead of older models such as the Core i9-10920X. This positioning reflects its strong multicore performance, which is ideal for workloads that can effectively utilize multiple threads, though it is outpaced by modern CPUs in single-threaded applications.

As of March 2026, the Core i9-9940X remains a viable option for users seeking a high-core-count CPU for professional workloads, particularly in content creation and technical computing. However, its age and power requirements make it less competitive compared to newer generations. For those prioritizing single-threaded performance or energy efficiency, modern alternatives from both Intel and AMD offer superior value. The Core i9-9940X serves as a testament to Intel's commitment to high-end desktop computing, though its market relevance has diminished in the face of rapid technological advancements.
Frequently Compared

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Intel Atom Z520 31 views

AMD Ryzen 7 7736U 29 views

Intel Pentium E5800 25 views

AMD Ryzen 7 5700G 24 views

Intel Xeon W-1350P 23 views

AMD A6-5200 23 views

AMD Ryzen 3 3200U 23 views

AMD A6-5350M 22 views

AMD E2-3000M 21 views

Intel Core i9-9940X

Main Specifications

Designer: Intel
Name: Core i9-9940X
Family: Core
Series: i9-9000
Model Number: i9-9940X
Cores: 14
Threads: 28
Base Frequency: 3300 MHz
Turbo Frequency (1 core): 4400 MHz
Turbo Frequency (2 cores): 4400 MHz
Clock Multiplier: 33x (unlocked)
Microarchitecture: Skylake
Core Name: Skylake X Refresh
Core Family: 6
Socket: Socket
Package: FCLGA-2066
Chipset: Lewisburg
Target Segment: Desktop
Max CPUs: 1
TDP: 165 W
Release Price: $1,387.00

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 vPro 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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