Core i5-6400
Intel
PassMark
5,417
MSRP
$182
AVG Price
$57
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 i5-6400 is manufactured by Intel. It was released in 2 July 2015 (10 years ago). It is based on the Skylake (2015−2016) architecture. It features 4 cores and 4 threads. Base frequency is 2.7 GHz, with boost up to 3.3 GHz. L3 cache: 6 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: LGA1151. Thermal design power (TDP): 65 Watt. Memory support: DDR3, DDR4. Passmark benchmark score: 5,417 points. Launch price was $187.
Value Upgrade Path
This is the official ChipVERSUS Value Rating, comparing raw performance (PassMark) per dollar. The Core i5-6400 is positioned at rank #600 in our cost-efficiency ranking, representing a Lower cost-benefit for your build. 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 i5-6400
FPS Benchmarks
Predicted performance for Core i5-6400 across popular games. Tested paired with RTX 4090 to isolate CPU performance.
Path of Exile 2
Counter-Strike 2
League of Legends
Valorant
Technical Analysis
Detailed breakdown of Core i5-6400 specifications and capabilities.
Processing Power
The Core i5-6400 is a 4-core / 4-thread processor based on the Skylake (2015−2016) architecture, manufactured on a 14 nm process node. It reaches a maximum boost clock of 3.3 GHz from a base frequency of 2.7 GHz— higher boost clocks directly translate to better single-threaded performance and responsiveness in gaming. It carries 6 MB (total) of L3 cache, plus 256K (per core) of L2 cache and 64K (per core) of L1 cache per core. In the PassMark benchmark (a comprehensive multi-threaded test), it scores 5,417, placing it in the Entry Level performance tier as a Legacy generation product. Geekbench 6 single-core (the most relevant metric for gaming FPS) records 950, while multi-core reaches 3,200.
| Specification | Core i5-6400 |
|---|---|
| Cores / ThreadsPhysical/logical processing units | 4C / 4T |
| Max Boost ClockPeak single-core speed under boost | 3.3 GHz |
| Base ClockGuaranteed minimum operating frequency | 2.7 GHz |
| ArchitectureCPU microarchitecture design | Skylake (2015−2016) |
| Process NodeFabrication technology — smaller = more efficient | 14 nm |
| L3 CacheShared cache — reduces memory latency for all cores | 6 MB (total) |
| L2 CachePer-core fast cache for frequently accessed data | 256K (per core) |
| L1 CacheUltra-fast per-core cache | 64K (per core) |
| Die SizePhysical silicon area of the processor | 177 mm2 |
| Bus SpeedData bus frequency | 4 × 8 GT/s |
| 64-bit Support | Yes |
| Windows 11 Compatible | No |
| PassMark ScoreOverall multi-threaded benchmark score | 5,417 |
| Geekbench 6 SingleSingle-core performance — most relevant for gaming | 950 |
| Geekbench 6 MultiMulti-core parallel workload performance | 3,200 |
Memory & Platform
The Core i5-6400 fits into the LGA1151 socket and supports PCIe 3.0 with 16 total PCIe lanes for expansion cards and storage. It supports DDR3, DDR4 memory at speeds up to DDR4-2133 (faster RAM improves bandwidth-sensitive workloads), with a maximum capacity of 64 GB across 2 channels (dual-channel doubles bandwidth). Integrated graphics: Intel HD Graphics 530 — allows display output without a dedicated GPU, useful for troubleshooting and light tasks.
| Specification | Core i5-6400 |
|---|---|
| TypeDesktop or Laptop processor | desktop |
| SeriesProduct family | Intel Core i5 |
| SocketMotherboard socket required | LGA1151 |
| PCIe GenerationPeripheral interconnect speed — affects GPU and SSD bandwidth | PCIe 3.0 |
| PCIe LanesTotal available lanes for GPUs, NVMe drives, and expansion | 16 |
| RAM TypeSupported memory standard | DDR3, DDR4 |
| Max RAM SpeedMaximum officially supported memory frequency | DDR4-2133 |
| Max RAM CapacityMaximum installable memory | 64 GB |
| RAM ChannelsDual-channel doubles bandwidth vs single-channel | 2 |
| ECC SupportError-Correcting Code memory — prevents data corruption | No |
| Integrated GPUBuilt-in graphics processor | Intel HD Graphics 530 |
| Compatible ChipsetsMotherboard chipsets that support this CPU | H110,B150,H170,Z170 |
| Max CPUs in ConfigMulti-socket support for servers | 1 (Uniprocessor) |
Advanced Features
The Core i5-6400 is primarily designed for Mainstream Desktop. Virtualization: VT-x, VT-d, EPT — enables running virtual machines efficiently (important for development and server workloads).
| Specification | Core i5-6400 |
|---|---|
| Primary Use CaseIntended workload category | Mainstream Desktop |
| OverclockingWhether CPU clock can be manually increased | 🔒 Locked |
| AVX-512Advanced vector instructions for AI/ML workloads | ❌ Not Supported |
| VirtualizationHardware-assisted virtualization technology | VT-x, VT-d, EPT |
Power & Cooling
The Core i5-6400 has a rated TDP (Thermal Design Power) of 65 Watt — this indicates the amount of heat generated under sustained load and determines what cooling solution is needed. It ships with the Stock Cooler stock cooler. Recommended cooling: Stock Cooler.
| Specification | Core i5-6400 |
|---|---|
| TDPThermal Design Power — heat output under sustained workload | 65 Watt |
| Included CoolerStock cooler bundled in the box | Stock Cooler |
| Recommended CoolerSuggested aftermarket cooling solution | Stock Cooler |
Value Analysis
At an average price of $57 (MSRP: $182), the Core i5-6400 delivers 95 PassMark points per dollar. It currently holds Rank #600 in the overall cost-benefit ranking — this ranking factors in performance-per-dollar relative to all available processors. Performance ranking position: #1812 out of all indexed processors.
| Specification | Core i5-6400 |
|---|---|
| MSRPManufacturer's Suggested Retail Price | $182 |
| Avg Price (30d)Average market price over the last 30 days | $57 |
| Launch PriceOriginal retail price at launch | $187 |
| Cost-Benefit RankPosition in overall value ranking | #600 |
| Performance RankPosition in overall performance ranking | #1812 |
| Release DateLaunch date | 2 July 2015 (10 years ago) |
| Release Year | 2015 |
| DesignerArchitecture designer (e.g. Intel, AMD) | Intel |
| ManufacturerFabrication foundry (e.g. TSMC) | Intel |
Similar Performance
Processors with benchmark scores closest to the current hardware, grouped by manufacturer.
Intel (12)
AMD (12)
Our Recommendation for Core i5-6400
Suggested pairings based on performance balance
Minimum (Avoid Bottleneck) (12)
Recommended (Balanced) (12)
High-End (Max Performance) (12)
Popular Comparisons
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