> ## Documentation Index
> Fetch the complete documentation index at: https://mintlify.com/modernharp/PCPartsPicker/llms.txt
> Use this file to discover all available pages before exploring further.
# Understanding components
> Learn about the different PC component categories and how to choose the right parts for your build
Building a custom PC requires understanding how different components work together. This guide explains each component category available in PCPartsPicker and helps you make informed decisions.
## Core components
These components are essential for every PC build.
The Central Processing Unit is your computer's brain, executing instructions and performing calculations.
### Key specifications
* **Core count**: More cores allow simultaneous processing of multiple tasks
* **Thread count**: Threads enable each core to handle multiple processes
* **Base/Boost clock speed**: Measured in GHz, affects single-threaded performance
* **Cache**: Faster memory built into the CPU for frequently accessed data
* **TDP (Thermal Design Power)**: Heat output, determines cooling requirements
### Popular options in PCPartsPicker templates
| Processor | Build Tier | Best For |
| ----------------- | ---------------- | ------------------------------------------------------ |
| Intel i5-12400F | Budget Build | Entry-level gaming, office work, web browsing |
| AMD Ryzen 5 8500G | Gaming Build | 1080p gaming, includes integrated graphics |
| AMD Ryzen 7 9700X | Excellent Build | Content creation, streaming, high-end gaming |
| Intel i9-13900K | Enthusiast Build | Professional workloads, 4K gaming, maximum performance |
### Choosing considerations
* **Gaming**: Focus on clock speed and single-threaded performance
* **Content creation**: Prioritize core count for rendering and encoding
* **Budget**: Processors with integrated graphics (like the Ryzen 5 8500G) can eliminate GPU costs initially
The motherboard is the central hub connecting all components through various slots and connectors.
### Critical compatibility factors
The motherboard must match your CPU's socket type. PCPartsPicker automatically filters compatible options based on your processor selection.
* **CPU socket**: Intel (LGA 1700, LGA 1200) or AMD (AM5, AM4) compatibility
* **Chipset**: Determines features like overclocking support and PCIe generation
* **Form factor**: ATX (full size), Micro-ATX (smaller), Mini-ITX (compact)
* **RAM slots**: Typically 2 or 4 DIMM slots, affecting maximum memory capacity
* **PCIe slots**: For graphics cards and expansion cards
### Important features
* **M.2 slots**: For fast NVMe SSD storage
* **USB ports**: Quantity and generation (USB 3.2, USB-C)
* **Network**: Ethernet speed and WiFi capabilities
* **Audio**: Onboard sound quality and output options
* **BIOS flashback**: Ability to update BIOS without CPU installed
Random Access Memory provides temporary storage for active programs and data, directly affecting system responsiveness.
### Specifications to consider
* **Capacity**: How much data can be stored
* 16GB: Minimum for modern gaming and productivity
* 32GB: Comfortable for content creation and heavy multitasking
* 64GB+: Professional applications, 3D rendering, video editing
* **Speed**: Measured in MT/s (mega-transfers per second)
* DDR4: 2666-3600 MT/s typical
* DDR5: 4800-6400 MT/s typical
* **Latency**: Lower CAS latency (CL) values provide better responsiveness
* **Configuration**: Single vs. dual channel
* 2x8GB outperforms 1x16GB due to dual-channel operation
* 2x16GB optimal for 32GB configurations
### Performance impact
RAM speed particularly benefits AMD Ryzen processors, which see measurable performance gains from faster memory.
The Graphics Processing Unit renders images, video, and animations. Essential for gaming and graphics-intensive applications.
### When you need a dedicated GPU
* Gaming at 1080p or higher resolution
* 3D modeling and CAD work
* Video editing and rendering
* Machine learning and AI workloads
* Cryptocurrency mining
### When integrated graphics suffice
The AMD Ryzen 5 8500G featured in PCPartsPicker's Gaming Build includes integrated graphics capable of light gaming and all productivity tasks. This allows budget-conscious builders to skip a dedicated GPU initially.
* Office productivity and web browsing
* Media consumption (streaming video)
* Light esports gaming (CS:GO, Valorant)
* Budget builds with upgrade path
### Key specifications
* **VRAM**: Dedicated memory for graphics data (8GB minimum for modern gaming)
* **CUDA cores / Stream processors**: Processing units for parallel computation
* **Clock speed**: Core and memory clock frequencies
* **Power consumption**: Affects power supply requirements and heat output
* **Physical dimensions**: Must fit in your case
Storage devices permanently store your operating system, applications, and files.
### Storage types
**NVMe SSD (Fastest)**
* Connected via M.2 slot on motherboard
* Read speeds: 3000-7000 MB/s
* Ideal for: Operating system, frequently-used applications, active projects
* No cables required
**SATA SSD (Fast)**
* Connected via SATA cable
* Read speeds: 500-550 MB/s
* Ideal for: Games, applications, general storage
* More affordable per GB than NVMe
**HDD (High Capacity)**
* Mechanical spinning disk
* Read speeds: 100-200 MB/s
* Ideal for: Media libraries, backups, archival storage
* Most affordable per GB
### Capacity recommendations
* **500GB SSD**: Minimum for OS and essential applications
* **1TB SSD**: Comfortable for OS, applications, and games
* **2TB+ HDD**: Add for bulk storage if needed
Many builders use a two-drive setup: Fast NVMe SSD for the operating system and active projects, plus a larger HDD for file archives and media storage.
The case houses and protects all components while providing cooling airflow.
### Form factor compatibility
Cases support specific motherboard sizes:
* **Full Tower**: ATX, Micro-ATX, Mini-ITX
* **Mid Tower**: ATX, Micro-ATX, Mini-ITX (most popular)
* **Mini Tower**: Micro-ATX, Mini-ITX
* **Small Form Factor**: Mini-ITX only
PCPartsPicker automatically verifies your case fits your motherboard and has adequate space for your GPU length.
### Important features
* **GPU clearance**: Maximum graphics card length supported
* **CPU cooler clearance**: Height restriction for air coolers
* **Drive bays**: Quantity and type (2.5" for SSDs, 3.5" for HDDs)
* **Fan mounts**: Number and size of supported cooling fans
* **Cable management**: Routing options and space behind motherboard tray
* **Front panel I/O**: USB ports, audio jacks, power button accessibility
## Additional components
These components complete your build and ensure proper operation.
Converts wall power to usable voltages for your components.
### Wattage calculation
Always include a 20-30% overhead beyond your calculated power consumption for efficiency and future upgrades.
Sum the power requirements:
* CPU: 65-250W depending on model
* GPU: 150-450W for gaming cards
* Other components: \~100W combined
Example: Ryzen 7 9700X (105W) + mid-range GPU (220W) + overhead = 650W PSU minimum
### Efficiency ratings
80 PLUS certification indicates efficiency:
* **80 PLUS Bronze**: 82-85% efficient
* **80 PLUS Gold**: 87-90% efficient (recommended minimum)
* **80 PLUS Platinum**: 89-92% efficient
* **80 PLUS Titanium**: 90-94% efficient
Higher efficiency means less wasted energy and lower electricity bills.
### Modularity
* **Non-modular**: All cables permanently attached
* **Semi-modular**: Main cables attached, others detachable
* **Fully modular**: All cables detachable (best for cable management)
Dissipates heat from the processor to prevent thermal throttling.
### Types of cooling
**Stock coolers**
* Included with many CPUs
* Adequate for stock speeds and moderate workloads
* Budget-friendly option
**Air coolers**
* Heat pipes and fins with fan
* Reliable, maintenance-free
* Height clearance important for case compatibility
**Liquid coolers (AIO)**
* Pump, radiator, and fans
* Better cooling performance
* Quieter operation under load
* Higher cost
### Sizing considerations
* Match TDP rating to CPU heat output
* i5-12400F (65W TDP): Stock cooler sufficient
* Ryzen 7 9700X (105W TDP): Quality air cooler recommended
* i9-13900K (253W TDP): High-end air or 240mm+ liquid cooler required
Provide airflow to remove hot air and bring in cool air.
### Optimal airflow configuration
* **Front/Bottom**: Intake fans (cool air in)
* **Top/Rear**: Exhaust fans (hot air out)
* **Positive pressure**: Slightly more intake than exhaust reduces dust
### Fan specifications
* **Size**: 120mm or 140mm (larger = quieter at same airflow)
* **Speed**: Measured in RPM, affects noise and airflow
* **Static pressure**: Important for radiators and restricted spaces
* **Airflow**: Measured in CFM, total air movement capacity
Most cases include basic fans. Consider upgrades if your build runs hot or you want quieter operation.
## How components work together
Understanding component relationships helps you make balanced choices:
* **CPU + Motherboard**: Must match socket type and chipset
* **CPU + RAM**: Processor supports specific RAM speeds
* **Motherboard + RAM**: RAM type (DDR4/DDR5) and maximum capacity determined by board
* **GPU + PSU**: Graphics card needs adequate power connectors and wattage
* **All components + Case**: Everything must physically fit with proper clearances
* **Power-hungry components + PSU**: Total system draw must be under PSU capacity
PCPartsPicker's automatic compatibility checking verifies all these relationships as you build, ensuring your configuration will work together properly.
## Related guides
Step-by-step guide to selecting components and creating your configuration
Plan builds for different budgets using the four template tiers