The power supply has more influence on how stable your PC is and how long it lasts than any other component, yet it is the part most people overlook when putting a build together. A weak or cheap PSU can cause sudden restarts, or even damage the rest of your parts. In this guide we explain how to pick a reliable power supply that matches your graphics card and processor without paying for more than you need.
How to choose the right power supplyBefore you buy, go through the core criteria that actually determine the quality of a PSU:
- Wattage: Add up what your processor and graphics card draw, then leave roughly a 30% margin on top. A simple office build is fine on 550-650W, a card in the RTX 4070 class wants 750W, and a powerful card such as an RTX 4080 or above is best paired with 850-1000W.
- 80+ efficiency rating: The higher the tier (Bronze, then Gold, then Platinum), the less heat is wasted and the lower your electricity bill. Gold is the balanced choice for most people, while Platinum makes more sense if you run the machine for long hours.
- ATX 3.0 / PCIe 5.0 support: Essential for modern graphics cards, because it handles sudden power spikes and gives you a native 12V-2x6 connector instead of a stack of adapters.
- Modular cables: A Fully Modular unit lets you connect only the cables you actually need, which keeps the case tidy and improves airflow. Non-Modular is cheaper, but it leaves spare cables sitting inside the case.
- Warranty and brand reputation: Stick to trusted brands with a long warranty, since that is a good indicator of the quality of the capacitors and the built-in protections (OVP, OCP and SCP).
Mid-range builds with an RTX 4060/4070 class card
If you are building a mid-range gaming rig, a high-efficiency 750W unit gives you peace of mind and room to upgrade later. A Platinum unit in white or black with detachable cables is an excellent option:
And if you would rather have the latest standards at a competitive price, the black Segotep model brings ATX 3.0 and PCIe 5.0 support:
High-end builds with an RTX 4070 Ti / 4080
For cards that draw more power, step up to the 850-1000W class to keep a healthy safety margin and stay stable under full load:
For the most demanding builds and future upgrades
If you are planning on a latest-generation card, or a system with a demanding processor and graphics card together, an 1100W unit with Gold efficiency and PCIe 5.0 support gives you long-term flexibility.
Does a higher wattage use more electricity? No, the unit only draws what the components need; the extra capacity is a safety margin, not constant consumption. Do I need Modular? It is not essential, but it makes cable management far easier and improves ventilation. Avoid no-name power supplies no matter how tempting the price, as they are the number one cause of damaged parts.
All of these units are available at competitive prices with cash on delivery and shipping to all 18 provinces of Iraq, so order with confidence and pay once the product reaches you.
