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How To Build A PC - Step By Step Guide (2021)

This is a step-by-step tutorial on how to build a computer in 30 minutes. We'll be using an ATX motherboard and case -the most common form factor for PCs with the AMD Ryzen 9 5900X CPU. Follow along and get expert instructions and technical insights from one of the best builders on the web, RobeyTech. Afterwards, you'll know the ins and outs of building computer that's capable for your gaming, rendering, and editing needs.

Components & Storage Featured Items

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AMD Ryzen 9 7900X - 12-Core 4.7 GHz - Socket AM5 - 170W Desktop Processor (100-100000589WOF)
AMD Ryzen 9 7900X - 12-Core 4.7 GHz - Socket AM5 - 170W Desktop Processor (100-100000589WOF)
  • L3 Cache: 64MB
  • Cooling Device: Cooling device not included - Processor Only
  • Manufacturing Tech: 5nm
  • 64-Bit Support: Yes
  • Model #: 100-100000589WOF
  • Item #: N82E16819113769
  • Return Policy: Replacement Only Return Policy
  •  
  • $549.00 
  • Free Shipping
AMD Ryzen 5 7600X - 6-Core 4.7 GHz - Socket AM5 - 105W Desktop Processor (100-100000593WOF)
AMD Ryzen 5 7600X - 6-Core 4.7 GHz - Socket AM5 - 105W Desktop Processor (100-100000593WOF)
  • L3 Cache: 32MB
  • Cooling Device: Cooling device not included - Processor Only
  • Manufacturing Tech: 5nm
  • Processors Type: Desktop
  • Model #: 100-100000593WOF
  • Item #: N82E16819113770
  • Return Policy: Replacement Only Return Policy
  •  
  • $299.00 
  • $4.99 Shipping
AMD Ryzen 9 7950X - 16-Core 4.5 GHz - Socket AM5 - 170W Desktop Processor (100-100000514WOF)
AMD Ryzen 9 7950X - 16-Core 4.5 GHz - Socket AM5 - 170W Desktop Processor (100-100000514WOF)
  • L3 Cache: 64MB
  • L2 Cache: 16MB
  • Cooling Device: Cooling device not included - Processor Only
  • Manufacturing Tech: 5nm
  • Model #: 100-100000514WOF
  • Item #: N82E16819113771
  • Return Policy: Replacement Only Return Policy
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  • $699.00 
  • Free Shipping
AMD Ryzen 7 7700X - 8-Core 4.5 GHz - Socket AM5 - 105W Desktop Processor (100-100000591WOF)
AMD Ryzen 7 7700X - 8-Core 4.5 GHz - Socket AM5 - 105W Desktop Processor (100-100000591WOF)
  • L3 Cache: 32MB
  • Cooling Device: Cooling device not included - Processor Only
  • Manufacturing Tech: 5nm
  • 64-Bit Support: Yes
  • Model #: 100-100000591WOF
  • Item #: N82E16819113768
  • Return Policy: Replacement Only Return Policy
  •  
  • $399.00 
  • Free Shipping
ASUS ROG CROSSHAIR X670E HERO (WiFi 6E) Socket AM5 (LGA 1718) Ryzen 7000 gaming motherboard ATX (18 + 2 power stages, PCIe 5.0, DDR5 support, five M.2 slots, USB 3.2 Gen 2x2 front-panel connector)
ASUS ROG CROSSHAIR X670E HERO (WiFi 6E) Socket AM5 (LGA 1718) Ryzen 7000 gaming motherboard ATX (18 + 2 power stages, PCIe 5.0, DDR5 support, five M.2 slots, USB 3.2 Gen 2x2 front-panel connector)
  • Number of Memory Slots: 4x288pin (DDR5)
  • Memory Standard: Supports DDR5 6400+(OC) / 6200(OC) / 6000(OC) / 5800(OC) / 5600 / 5400 / 5200 / 5000 / 4800 * Supported memory types, data rate(Speed), and number of DRAM module vary depending on the CPU and memory configuration, for more information refer to www.asus.com for memory support list.
  • Audio Chipset: Realtek ALC4082
  • PCI Express x1: 1 x PCI Express 4.0 x1
  • Model #: 90MB1BC0-M0AAY0
  • Item #: N82E16813119582
  • Return Policy: Standard Return Policy
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  • $699.99 
  • Free Shipping
GIGABYTE X670 AORUS ELITE AX AM5 LGA 1718 AMD X670 ATX Motherboard with 5-Year Warranty DDR5, Quad M.2, PCIe 5.0, USB 3.2 Gen2X2 Type-C, AMD WiFi 6E, 2.5GbE LAN, Q-Flash Plus, M.2 EZ-Latch
GIGABYTE
GIGABYTE X670 AORUS ELITE AX AM5 LGA 1718 AMD X670 ATX Motherboard with 5-Year Warranty DDR5, Quad M.2, PCIe 5.0, USB 3.2 Gen2X2 Type-C, AMD WiFi 6E, 2.5GbE LAN, Q-Flash Plus, M.2 EZ-Latch
  • Number of Memory Slots: 4x288pin (DDR5)
  • Memory Standard: Support for DDR5 5200/4800/4400 MHz memory modules
  • Audio Chipset: Realtek® Audio CODEC
  • Audio Channels: High Definition Audio 2/4/5.1/7.1-channel * You can change the functionality of an audio jack using the audio software. To configure 7.1-channel audio, access the audio software for audio settings.
  • Model #: X670 AORUS ELITE AX
  • Item #: N82E16813145406
  • Return Policy: Standard Return Policy
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  • $289.99 
  • Free Shipping
ASRock Challenger D Radeon RX 6600 XT 8GB GDDR6 PCI Express 4.0 Video Card RX6600XT CLD 8GO
ASRock Challenger D Radeon RX 6600 XT Video Card RX6600XT CLD 8GO
  • Core Clock: 2000 MHz
  • Max Resolution: 7680 x 4320
  • DisplayPort: 3 x DisplayPort 1.4 with DSC
  • HDMI: 1 x HDMI 2.1 VRR
  • Model #: RX6600XT CLD 8GO
  • Item #: N82E16814930063
  • Return Policy: Replacement Only Return Policy
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  • $329.99 (3 Offers)
  • $309.99 after $20.00 rebate
  • Free Shipping
MSI MAG Core Liquid C240 EVA e-PROJECT AIO Liquid CPU Cooler, 240mm Radiator, Dual 120mm PWN Fans, ARGB lighting controled by software, AM5 Compatible
MSI MAG Core Liquid C240 EVA e-PROJECT AIO Liquid CPU Cooler, 240mm Radiator, Dual 120mm PWN Fans, ARGB lighting controled by software, AM5 Compatible
  • Type: Liquid Cooling System
  • Block Compatibility: Intel LGA 2066 / 2011-3 / 2011 / 1700 / 1366 / 1200 / 1156 / 1155 / 1151 / 1150 AMD AM5 / AM4 / AM3+ / AM3 / AM2+ / AM2 / FM2+ / FM2 / FM1
  • Block Dim.: 70.50 x 70.50 x 52.00 mm
  • Pump Noise: 18 dBA
  • Model #: MAG CORELIQUID C240 EVA e-PROJECT
  • Item #: N82E16835846043
  • Return Policy: Standard Return Policy
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  • $159.99 
  • Free Shipping
WD Blue 3D NAND 1TB Internal SSD - SATA III 6Gb/s 2.5"/7mm Solid State Drive - WDS100T2B0A
WD Blue 3D NAND 1TB Internal SSD - SATA III 6Gb/s 2.5"/7mm Solid State Drive - WDS100T2B0A
  • Max Sequential Read: Up to 560 MBps
  • Max Sequential Write: Up to 530 MBps
  • 4KB Random Read: Up to 95,000 IOPS
  • 4KB Random Write: Up to 84,000 IOPS
  • Model #: WDS100T2B0A
  • Item #: N82E16820250088
  • Return Policy: Standard Return Policy
G.SKILL Trident Z5 RGB Series 32GB (2 x 16GB) 288-Pin PC RAM DDR5 6000 Intel XMP 3.0 Desktop Memory Model F5-6000J3636F16GX2-TZ5RK
G.SKILL Trident Z5 RGB Series 32GB (2 x 16GB) 288-Pin PC RAM DDR5 6000 Intel XMP 3.0 Desktop Memory Model F5-6000J3636F16GX2-TZ5RK
  • CAS Latency: 36
  • Voltage: 1.35V
  • Multi-channel Kit: Dual Channel Kit
  • Timing: 36-36-36-96
  • Model #: F5-6000J3636F16GX2-TZ5RK
  • Item #: N82E16820374351
  • Return Policy: Standard Return Policy
CORSAIR Vengeance 32GB (2 x 16GB) 288-Pin PC RAM DDR5 5600 (PC5 44800) Intel XMP 3.0 Desktop Memory Model CMK32GX5M2B5600C36
CORSAIR Vengeance 32GB (2 x 16GB) 288-Pin PC RAM DDR5 5600 (PC5 44800) Intel XMP 3.0 Desktop Memory Model CMK32GX5M2B5600C36
  • CAS Latency: 36
  • Voltage: 1.25V
  • Timing: 36-36-36-76
  • Color: Black
  • Model #: CMK32GX5M2B5600C36
  • Item #: N82E16820236828
  • Return Policy: Standard Return Policy
  • $169.99
  •  
  • $159.99 (2 Offers)
  • Save: 5%
  • Est. Shipping Fee $0.99
  • Eligible for Free Shipping

Seagate BarraCuda ST8000DM004 8TB 5400 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive - OEM
Seagate BarraCuda ST8000DM004 8TB 5400 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive - OEM
  • NAND Flash Memory Type: Hard Drive
  • Recording Technology: SMR
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Model #: ST8000DM004
  • Item #: N82E16822183793
  • Return Policy: Standard Return Policy
  • $189.99
  •  
  • $139.99 (11 Offers)
  • Save: 26%
  • $0.99 Shipping

Computer components like the CPU, motherboard, computer case, RAM and drive are the core of a computer. They determine the capabilities and features of a computer, as well as its power and processing speeds. It’s important to choose computer components that can work together to satisfy your needs.

Computer CPU Processors Provide Processing Power

When building a new computer or upgrading an old one, focus on the computer's Central Processing Unit (CPU) first, as it defines most of the components a computer can use. It will also determine what you can do with the computer. Typical users can skate by with a basic processor for surfing the net and checking email. Gamers will likely want a quad-core processor, though as games advance, six and eight-core processors become more attractive options. The more cores or threads a computer's CPU processor has, the better performance it will provide, so graphic designers and video editors may need a high-end six or eight-core model. 

CPU Motherboards Offer PCIe® Slots and a Home for the CPU

The CPU connects to the motherboard, and provides Peripheral Component Interconnect express (PCIe) slots to connect devices. Depending on the motherboard, you can add video and graphics cards, a Solid State Drive (SSD) and more. The CPU motherboard also determines the type and amount of Random Access Memory (RAM) you can use. Pair motherboards with CPUs of the same generation for the best performance, and to ensure they can work together. Make sure to get a cooling fan that can keep up. 

Computer Cases House and Protect Computer Components

There are three case size categories, though the computer cases themselves have varying dimensions. Full towers are large enough to accommodate specialty parts, such as Extended Advanced Technology Extended (ATX) motherboards and water cooling systems. Mid towers are the most common, and easily suit the needs of most users. Micro-ITX computer cases are large enough to house mini-ITX motherboards, and they are an excellent choice for basic rigs. Choose a case that can accommodate all computer components and allows airflow, which prevents overheating.

RAM Provides Dynamic Memory That Increases Processing Speeds

Small Outline Dual In-Line Memory Module (SO-DIMM) and Dual In-Line Memory Module (DIMM) reference the physical size of a memory stick. As a rule, SO-DIMMs are smaller and reserved for laptops and mini-PCs, while DIMMs are for full-size desktops. Double Data Rate (DDR) is the most common type of memory used by modern computers. DDR4 is the newest rendition. It’s faster than DDR3, which is nearly obsolete, but still capable of fulfilling the needs of most users.

Hard Drives and Solid State Drives Represent a Computer’s Storage Space

SSD drives are quieter, faster, conserve more energy and last longer than a standard HDD. That said, when comparing an SSD and an HDD of equal capacities, the HDD is almost always significantly cheaper. If storage is more important than speed, it’s often more economical to choose an HDD.