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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.

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Intel Core i9-12900K - Core i9 12th Gen Alder Lake 16-Core (8P+8E) 3.2 GHz LGA 1700 125W Intel UHD Graphics 770 Desktop Processor - BX8071512900K
Intel Core i9-12900K - Core i9 12th Gen Alder Lake 16-Core (8P+8E) 3.2 GHz LGA 1700 125W Intel UHD Graphics 770 Desktop Processor - BX8071512900K

Get Dying Light 2 Bundle w/ purchase, limited offer

  • L3 Cache: 30MB
  • L2 Cache: 14MB
  • Cooling Device: Cooling device not included - Processor Only
  • Manufacturing Tech: Intel 7
  • Model #: BX8071512900K
  • Item #: N82E16819118339
  • Return Policy: Replacement Only Return Policy
AMD Ryzen 5 5600 - Ryzen 5 5000 Series Vermeer (Zen 3) 6-Core 3.5 GHz Socket AM4 65W Desktop Processor - 100-100000927BOX
AMD Ryzen 5 5600 - Ryzen 5 5000 Series Vermeer (Zen 3) 6-Core 3.5 GHz Socket AM4 65W Desktop Processor - 100-100000927BOX

+ $15 off w/ promo code EDLBSA739, limited offer

  • L3 Cache: 32MB
  • L2 Cache: 3MB
  • Cooling Device: Wraith Stealth
  • Manufacturing Tech: 7nm
  • Model #: 100-100000927BOX
  • Item #: N82E16819113736
  • Return Policy: Replacement Only Return Policy
  •  
  • $199.00 (11 Offers)
  • Sale Ends in 22 Hours -
  • Free Shipping
ASUS ROG Maximus Z690 Hero (WiFi 6E) LGA 1700 Intel 12th Gen ATX Gaming Motherboard- PCIe 5.0, DDR5, 20+1 90A Power Stages, 2.5Gb LAN, Bluetooth V5.2, 2x Thunderbolt 4 ports, 5xM.2/NVMe SSD
ASUS ROG Maximus Z690 Hero (WiFi 6E) LGA 1700 Intel 12th Gen ATX Gaming Motherboard- PCIe 5.0, DDR5, 20+1 90A Power Stages, 2.5Gb LAN, Bluetooth V5.2, 2x Thunderbolt 4 ports, 5xM.2/NVMe SSD
  • Memory Standard: DDR5 6400(OC) / 6200(OC) / 6000(OC) / 5800(OC) / 5600(OC) / 5400(OC) / 5200(OC) / 5000(OC) / 4800 * Refer to www.asus.com for the Memory QVL (Qualified Vendors Lists).
  • Number of Memory Slots: 4x288pin (DDR5)
  • Audio Chipset: Realtek ALC4082
  • PCI Express 5.0 x16: 2 x PCI Express 5.0 x16 * Actual support may vary by CPU. * Support x16 or x8/x8 modes. * When ROG Hyper M.2 card is installed on PCIEX16(G5)_1, PCIEX16(G5)_2 will run x8 only and if ROG Hyper M.2 card is installed on PCIEX16(G5)_2, PCIEX16(G5)_1 will run x8 only.
  • Model #: 90MB18E0-M0AAY0
  • Item #: N82E16813119504
  • Return Policy: Standard Return Policy
GIGABYTE B550 AORUS PRO V2 AM4 AMD B550 ATX Motherboard with Dual M.2, SATA 6Gb/s, USB 3.2 Gen 2, 2.5 GbE LAN, PCIe 4.0
GIGABYTE B550 AORUS PRO V2 AM4 AMD B550 ATX Motherboard with Dual M.2, SATA 6Gb/s, USB 3.2 Gen 2, 2.5 GbE LAN, PCIe 4.0

Save even more w/ combo purchase, limited offer

  • Number of Memory Slots: 4x288pin (DDR4)
  • Memory Standard: DDR4 5400(OC) / 5200(OC) / 5000(OC) / 4866(OC) / 4600(OC) / 4400(OC) / 4000(OC) / 3600(OC) / 3333(OC) / 3200 / 2933 / 2667 / 2400 / 2133 (3rd Gen AMD Ryzen with Radeon Graphics processors) DDR4 5200(OC) / 5000(OC) / 4866(OC) / 4600(OC) / 4400(OC) / 4000(OC) / 3600(OC) / 3333(OC) / 3200 / 2933 / 2667 / 2400 / 2133 (3rd Gen AMD Ryzen Processors) DDR4 5100(OC) / 5000(OC) / 4866(OC) / 4600(OC) / 4400(OC) / 4000(OC) / 3600(OC) / 3333(OC) / 3200 / 2933 / 2667 / 2400 / 2133 (AMD Ryzen 5000 series Processors)
  • PCI Express 3.0 x16: 2 x PCI Express 3.0 x16
  • Onboard Video Chipset: Supported only by CPU with integrated graphic
  • Model #: B550 AORUS PRO V2
  • Item #: N82E16813145271
  • Return Policy: Standard Return Policy
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

“Coming Soon” AMD Radeon Raise the Game Bundle, click for details

  • Max Resolution: 7680 x 4320
  • DisplayPort: 3 x DisplayPort 1.4 with DSC
  • HDMI: 1 x HDMI 2.1 VRR
  • Card Dimensions (L x H): 10.59" x 5.20"
  • Model #: RX6600XT CLD 8GO
  • Item #: N82E16814930063
  • Return Policy: Replacement Only Return Policy
  • $419.99
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  • $388.99 (3 Offers)
  • Save: 7%
  • $373.99 after $15.00 rebate
  • $9.99 Shipping
MSI MPG GUNGNIR 110R EVA e-PROJECT Black ABS Plastic / SPCC Steel / Tempered Glass ATX Mid Tower Computer Case
MSI
MSI MPG GUNGNIR 110R EVA e-PROJECT Black Computer Case
  • Motherboard Compatibility: Micro ATX / ATX / Mini-ITX
  • Front Ports: 2 x USB 3.2 Gen 1 / 1 x USB 3.2 Gen 2x2 Type-C / Audio
  • Power Supply Mounted: Bottom
  • Side Panel Window: Yes
  • Model #: MPG GUNGNIR 110R EVA e-PROJECT
  • Item #: N82E16811320048
  • Return Policy: Standard Return Policy
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  • $129.99 
  • $9.99 Shipping
MSI MAG Core Liquid C240 EVA e-PROJECT AIO Liquid CPU Cooler, 240mm Radiator, Dual 120mm PWN Fans, ARGB lighting controled by software
MSI
MSI MAG Core Liquid C240 EVA e-PROJECT AIO Liquid CPU Cooler, 240mm Radiator, Dual 120mm PWN Fans, ARGB lighting controled by software
  • Type: Liquid Cooling System
  • Block Compatibility: Intel LGA 2066 / 2011-3 / 2011 / 1700 / 1366 / 1200 / 1156 / 1155 / 1151 / 1150 AMD 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
MSI MAG B660 TOMAHAWK EVA e-PROJECT DDR5 LGA 1700 Intel B660 SATA 6Gb/s ATX Intel Motherboard
MSI
MSI MAG B660 TOMAHAWK EVA e-PROJECT DDR5 LGA 1700 ATX Intel Motherboard
  • Memory Standard: DDR5 6200+ (OC)
  • Number of Memory Slots: 4x288pin (DDR5)
  • Audio Chipset: Realtek ALC1220P
  • PCI Express 4.0 x16: 1 x PCI Express 4.0 x16
  • Model #: MAG B660 TOMAHAWK EVA e-PROJECT
  • Item #: N82E16813144542
  • Return Policy: Standard Return Policy
  •  
  • $218.99 
  • Free Shipping
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

+ $30 off w/ promo code CSR5235, limited offer

  • CAS Latency: 36
  • Voltage: 1.25V
  • Timing: 36-36-36-76
  • Color: Black
  • Model #: CMK32GX5M2B5600C36
  • Item #: N82E16820236828
  • Return Policy: Standard Return Policy
  • $309.99
  •  
  • $269.99 (4 Offers)
  • Save: 12%
  • Free Shipping
EVGA SuperNOVA 1300 G2 120-G2-1300-XR 80+ GOLD 1300W Fully Modular Includes FREE Power On Self Tester Power Supply
EVGA SuperNOVA 1300 G2 120-G2-1300-XR 80+ GOLD 1300W Fully Modular Includes FREE Power On Self Tester Power Supply
  • Fans: 1 x 140mm Double Ball Bearing fan
  • Main Connector: 24Pin
  • +12V Rails: Single
  • PCI-Express Connector: 6 x 6+2-Pin, 2 x 6-Pin
  • Model #: 120-G2-1300-XR
  • Item #: N82E16817438011
  • Return Policy: Standard Return Policy
Fractal Design Meshify C Black ATX High-Airflow Compact Light Tint Tempered Glass Mid Tower Computer Case, FD-CA-MESH-C-BKO-TGL
Fractal Design Meshify C Black ATX High-Airflow Compact Light Tint Tempered Glass Mid Tower Computer Case, FD-CA-MESH-C-BKO-TGL
  • Motherboard Compatibility: Micro ATX / ATX / Mini-ITX
  • Front Ports: 2 x USB 3.0 / Audio
  • Power Supply Mounted: Bottom
  • Side Panel Window: Yes
  • Model #: FD-CA-MESH-C-BKO-TGL
  • Item #: N82E16811352084
  • Return Policy: Standard Return Policy

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.