Welcome! My name is Matt, and today I'll show you how to transform an old desktop into a fully-fledged gaming PC. This guide will cover the parts you'll need to upgrade and how to install each component. A big shoutout to DiscountPC.com for providing most of the hardware used in this guide. You can check them out for a large selection of refurbished computers.
Choosing the Right System for Upgrading
For the best value, consider desktops based on the LGA 1155 socket with 2nd gen Core processors. While older systems like Core 2 Duo and Core 2 Quad might work, an LGA 1155-based system is ideal for modern 1080p gaming. For this guide, we'll use a Dell Optiplex 790, which has plenty of space for hardware, a decent upgrade path, and an OEM Windows key.
Current System Configuration:
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CPU: Intel i3 2100
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RAM:4 GB
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Power Supply: Non-gaming ready
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Storage:250 GB mechanical hard drive
Upgrading the CPU
The current i3 2100 is fine for eSports and light 1080p gaming, but upgrading to an i5 2400 or 2500 will significantly improve performance. For this guide, we'll use an i5 2500.
Steps to Upgrade the CPU:
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Remove the CPU Cooler: Unscrew all four corners and flip it over.
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Clean the Old Thermal Paste: Use an alcohol-soaked paper towel or rag.
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Remove the Old CPU: Push down and out on the socket retention arm, lift the socket, and handle the CPU by its edges.
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Install the New CPU: Align the marked corner of the CPU with the socket and lower it into place. Close the socket.
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Apply New Thermal Paste: Put a pea-sized amount on the CPU IHS.
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Reattach the Cooler: Screw it back down in a cross pattern.
Upgrading RAM
Secondhand DDR3 RAM is much cheaper than DDR4, making it a cost-effective upgrade. Upgrading to 8 GB is ideal, but you can go up to 16 GB if needed.
Steps to Upgrade RAM:
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Unlock Unused Slots: Unlock the three unused slots.
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Install RAM Sticks: Line the notch in the RAM with the slot and click it into place. Ensure both sticks are in the same color slot for optimal performance.
Upgrading Storage
Most systems come with small mechanical hard drives. Upgrading to an SSD can significantly speed up your system.
Steps to Install an SSD:
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Use a Drive Adapter: Install the SSD into a 2.5 to 3.5-inch drive adapter.
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Install the Adapter: Place it in the drive sled.
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Connect the SSD: Plug it into the SATA power and data ports, ensuring it's connected to a SATA 3 port on the motherboard.
Upgrading the Power Supply
A 450 or 500-watt power supply from a reputable manufacturer like EVGA or Corsair is recommended.
Steps to Install a New Power Supply:
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Remove the Old PSU: Unplug the 24-pin motherboard connector, 4-pin CPU connector, and SATA power connectors.
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Install the New PSU: Place it with the fan facing down and secure it with screws.
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Reconnect Cables: Connect the 24-pin, 4-pin CPU, and SATA connectors.
Installing the Graphics Card
A dedicated graphics card will turn your office PC into a gaming machine. Budget cards like the GTX 760 or AMD 7000 series are great options.
Steps to Install a Graphics Card:
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Open the PCIe Slot: Remove the top two covers.
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Install the Card: Align it with the PCIe slot and press it into place.
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Connect Power: Plug in the supplemental PCIe power connector.
Final Touches: Cable Management
Good cable management ensures no cables obstruct airflow or contact fans. While the system doesn't have a side panel window, it's still important for airflow.
By following these steps, you'll have transformed your old office computer into a gaming PC. Special thanks to DiscountPC.com for providing the hardware. Check them out for configurable refurbished computers.