Core components
These components are essential for every PC build.CPU (Processor)
CPU (Processor)
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
Motherboard
Motherboard
The motherboard is the central hub connecting all components through various slots and connectors.
Critical compatibility factors
- 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
Memory (RAM)
Memory (RAM)
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.
Graphics Card (GPU)
Graphics Card (GPU)
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
Storage
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
- Connected via SATA cable
- Read speeds: 500-550 MB/s
- Ideal for: Games, applications, general storage
- More affordable per GB than NVMe
- 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
Case
Case
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.Power Supply (PSU)
Power Supply (PSU)
Converts wall power to usable voltages for your components.
Wattage calculation
Sum the power requirements:- CPU: 65-250W depending on model
- GPU: 150-450W for gaming cards
- Other components: ~100W combined
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
Modularity
- Non-modular: All cables permanently attached
- Semi-modular: Main cables attached, others detachable
- Fully modular: All cables detachable (best for cable management)
CPU Cooler
CPU Cooler
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
- Heat pipes and fins with fan
- Reliable, maintenance-free
- Height clearance important for case compatibility
- 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
Case Fans
Case Fans
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
Building your PC
Step-by-step guide to selecting components and creating your configuration
Budget planning
Plan builds for different budgets using the four template tiers