Core i9-9940X
Intel
PassMark
28,088
MSRP
$1387
AVG Price
$850
Performance Spectrum - CPU
About PassMark
PassMark CPU Mark evaluates processor speed through complex mathematical computations. It provides a reliable metric to compare multi-core performance, where higher scores indicate faster processing for multitasking, gaming, and heavy workloads.
Overview
The Core i9-9940X is manufactured by Intel. It was released in 19 October 2018 (7 years ago). It is based on the Skylake (server) (2017−2018) architecture. It features 14 cores and 28 threads. Base frequency is 3.3 GHz, with boost up to 4.5 GHz. L3 cache: 19.25 MB (total). L2 cache: 1 MB (per core). Built on 14 nm process technology. Socket: LGA2066. Thermal design power (TDP): 165 Watt. Memory support: DDR4-2666. Passmark benchmark score: 28,088 points. Launch price was $1,387.
Value Upgrade Path
This is the official ChipVERSUS Value Rating, comparing raw performance (PassMark) per dollar. Components placed above yours deliver better value for money.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Core i9-9940X
FPS Benchmarks
Predicted performance for Core i9-9940X across popular games. Tested paired with RTX 4090 to isolate CPU performance.
Baldur's Gate 3
Call of Duty: Warzone
Counter-Strike 2
Dota 2
League of Legends
Overwatch 2
Palworld
Path of Exile 2
Rust
Stardew Valley
Technical Analysis
Detailed breakdown of Core i9-9940X specifications and capabilities.
Processing Power
The Core i9-9940X is a 14-core / 28-thread processor based on the Skylake (server) (2017−2018) architecture, manufactured on a 14 nm process node. It reaches a maximum boost clock of 4.5 GHz from a base frequency of 3.3 GHz— higher boost clocks directly translate to better single-threaded performance and responsiveness in gaming. It carries 19.25 MB (total) of L3 cache, plus 1 MB (per core) of L2 cache and 64 kB (per core) of L1 cache per core. In the PassMark benchmark (a comprehensive multi-threaded test), it scores 28,088, placing it in the High-End performance tier as a Legacy generation product.
| Specification | Core i9-9940X |
|---|---|
| Cores / ThreadsPhysical/logical processing units | 14C / 28T |
| Max Boost ClockPeak single-core speed under boost | 4.5 GHz |
| Base ClockGuaranteed minimum operating frequency | 3.3 GHz |
| ArchitectureCPU microarchitecture design | Skylake (server) (2017−2018) |
| Process NodeFabrication technology — smaller = more efficient | 14 nm |
| L3 CacheShared cache — reduces memory latency for all cores | 19.25 MB (total) |
| L2 CachePer-core fast cache for frequently accessed data | 1 MB (per core) |
| L1 CacheUltra-fast per-core cache | 64 kB (per core) |
| Die SizePhysical silicon area of the processor | 484 mm2 |
| Bus SpeedData bus frequency | 4 × 8 GT/s |
| Max TemperatureMaximum safe operating temperature (Tjmax) | 88 °C |
| 64-bit Support | Yes |
| Windows 11 Compatible | Yes |
| Unlocked MultiplierWhether the CPU can be overclocked | Yes (Overclockable) |
| PassMark ScoreOverall multi-threaded benchmark score | 28,088 |
Memory & Platform
The Core i9-9940X fits into the LGA2066 socket and supports PCIe 3.0 with 44 total PCIe lanes for expansion cards and storage. It supports DDR4-2666 memory at speeds up to DDR4-2666 (faster RAM improves bandwidth-sensitive workloads), with a maximum capacity of 128 GB across 4 channels (dual-channel doubles bandwidth).
| Specification | Core i9-9940X |
|---|---|
| TypeDesktop or Laptop processor | desktop |
| SeriesProduct family | Intel Core i9 |
| SocketMotherboard socket required | LGA2066 |
| PCIe GenerationPeripheral interconnect speed — affects GPU and SSD bandwidth | PCIe 3.0 |
| PCIe LanesTotal available lanes for GPUs, NVMe drives, and expansion | 44 |
| RAM TypeSupported memory standard | DDR4-2666 |
| Max RAM SpeedMaximum officially supported memory frequency | DDR4-2666 |
| Max RAM CapacityMaximum installable memory | 128 GB |
| RAM ChannelsDual-channel doubles bandwidth vs single-channel | 4 |
| ECC SupportError-Correcting Code memory — prevents data corruption | No |
| Integrated GPUBuilt-in graphics processor | No |
| Max CPUs in ConfigMulti-socket support for servers | 1 (Uniprocessor) |
Advanced Features
The Core i9-9940X is primarily designed for Workstation. It features an unlocked multiplier, allowing enthusiasts to overclock beyond stock frequencies for additional performance. It supports AVX-512 instructions — specialized SIMD operations that significantly accelerate AI inference, scientific computing, and video encoding workloads. Virtualization: VT-x, VT-d — enables running virtual machines efficiently (important for development and server workloads).
| Specification | Core i9-9940X |
|---|---|
| Primary Use CaseIntended workload category | Workstation |
| OverclockingWhether CPU clock can be manually increased | ✅ Unlocked |
| AVX-512Advanced vector instructions for AI/ML workloads | ✅ Supported |
| VirtualizationHardware-assisted virtualization technology | VT-x, VT-d |
Power & Cooling
The Core i9-9940X has a rated TDP (Thermal Design Power) of 165 Watt — this indicates the amount of heat generated under sustained load and determines what cooling solution is needed.
| Specification | Core i9-9940X |
|---|---|
| TDPThermal Design Power — heat output under sustained workload | 165 Watt |
| Max TemperatureMaximum safe junction temperature (Tjmax) | 88 °C |
Value Analysis
At an average price of $850 (MSRP: $1387), the Core i9-9940X delivers 33 PassMark points per dollar. Performance ranking position: #481 out of all indexed processors.
| Specification | Core i9-9940X |
|---|---|
| MSRPManufacturer's Suggested Retail Price | $1387 |
| Avg Price (30d)Average market price over the last 30 days | $850 |
| Launch PriceOriginal retail price at launch | $1,387 |
| Performance RankPosition in overall performance ranking | #481 |
| Release DateLaunch date | 19 October 2018 (7 years ago) |
| Release Year | 2018 |
| DesignerArchitecture designer (e.g. Intel, AMD) | Intel |
| ManufacturerFabrication foundry (e.g. TSMC) | Intel |
Specifications Reference
Raw spec sheet for quick lookup. The analysis cards above explain what these fields mean in practice.
4 categories
General Information
8 specs
General Information
8 specs
| Type | desktop |
| Series | Intel Core i9 |
| Designer | Intel |
| Launch Price | $1,387 |
| Manufacturer | Intel |
| Release Date | 19 October 2018 (7 years ago) |
| Architecture Codename | Skylake (server) (2017−2018) |
| Performance Ranking Position | 481 |
Technical Specifications
16 specs
Technical Specifications
16 specs
| Cores | 14 |
| Threads | 28 |
| Bus Type | DMI 3.0 |
| Die Size | 484 mm2 |
| L1 Cache | 64 kB (per core) |
| L2 Cache | 1 MB (per core) |
| L3 Cache | 19.25 MB (total) |
| Bus Speed | 4 × 8 GT/s |
| Multiplier | 33 |
| Max Frequency | 4.5 GHz |
| 64-Bit Support | + |
| Base Frequency | 3.3 GHz |
| Process Technology | 14 nm |
| Unlocked Multiplier | + |
| Max Core Temperature | 88 °C |
| Windows 11 Compatible | + |
Compatibility
4 specs
Compatibility
4 specs
| Socket | LGA2066 |
| PCIe Generation | PCIe 3.0 |
| Power Consumption (TDP) | 165 Watt |
| Max Processors In Config | 1 (Uniprocessor) |
Memory
4 specs
Memory
4 specs
| RAM Types | DDR4-2666 |
| Memory Channels | 4 |
| Memory Bandwidth | 85.33 GB/s |
| Max Memory Capacity | 128 GB |
Similar Performance
Processors with benchmark scores closest to the current hardware, grouped by manufacturer.
Intel (8)
AMD (8)
Our Recommendation for Core i9-9940X
Suggested pairings based on performance balance
Minimum (Avoid Bottleneck) (12)
Recommended (Balanced) (12)
High-End (Max Performance) (12)
Popular Comparisons
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