One of the most common questions we get at Jowa Souq: how many watts do I need from my power supply? There is no single answer that fits everyone. The power supply (PSU) is the one part in your PC that, when it fails, can take the processor, the graphics card and the drives down with it, and yet most people buy it with whatever money is left over at the end of the budget. In this guide we will get you to a realistic number you can rely on, explain the difference between the certifications and the types, and give you options that suit every pocket.
Step one: the two parts that decide everything
In any build, the graphics card and the processor account for roughly 80% of total power draw. Everything else, the motherboard, the RAM, the M.2 drive, the fans, the lighting, the keyboard and the mouse, rarely goes past 80 W all combined. So instead of adding up every component on its own, add the card and the processor together and put another 100 W on top for the rest; that gives you your real draw under full load.
- An office or study PC with no dedicated graphics card: roughly 150-250 W.
- Budget gaming with an entry-level card: 300-400 W.
- Mid-range gaming with a mid-tier card and a 6-8 core processor: 400-550 W.
- High-end gaming with a top-tier card: 550-750 W.
- A rendering workstation or an all-out build: 750 W and up.
Step two: leave headroom, do not run on the edge
The simple rule: take your real draw and add about 30% to it. Three reasons make that headroom a necessity, not a luxury:
- Transient spikes: modern graphics cards pull spikes several times their normal draw for fractions of a second, and if the PSU is sitting on the edge your PC will shut off suddenly in the middle of a game.
- Peak efficiency: most units deliver their best efficiency and lowest temperatures at 40-60% load, which means a 750 W unit running at 400 W stays quieter and cooler than a 500 W unit under the same load.
- Heat and lifespan: Iraqi summers are brutal, and every PSU loses output as temperatures climb and as its capacitors age after two or three years. Headroom covers that loss.
Quick table: what suits your build
| Build type | Approximate draw | Recommended PSU |
|---|---|---|
| Office / study / camera systems | 150-250 W | 450-550 W |
| Budget gaming | 300-400 W | 550-650 W |
| Mid-range gaming | 400-550 W | 650-850 W |
| High-end gaming / video editing | 550-750 W | 850-1000 W |
| Rendering workstation | 750 W and up | 1000 W and up |
The 80 PLUS certification: Bronze, Gold, Platinum
The certification measures how efficiently the unit converts electricity: the higher the efficiency, the less power is wasted as heat. Bronze is a respectable budget choice for light builds, Gold is the best balance point for most users, and Platinum gives you the lowest heat, the quietest operation and a smaller electricity bill. In Iraq specifically, higher efficiency also means less draw from the UPS and longer runtime during an outage.
Modular or non-modular?
On a non-modular unit every cable is permanently attached; it is cheaper, but it leaves spare cables crammed inside the case, choking the airflow. A fully modular unit lets you connect only the cable you actually need, so you get tidier routing, better airflow and a nicer look behind the glass. If your case is small or you care about how the inside looks, pay the difference and go modular.
Our picks for your budget
If you have an entry-level graphics card and want the cheapest safe option, a 650 W Bronze non-modular unit gives you comfortable headroom at around 82,000 IQD, as long as you pay attention to cable routing inside the case.
If you are after the best value for money, an 850 W unit with a Gold rating and ATX 3.1 and PCIe 5.1 support is an excellent choice for mid-range and high-end builds, and it readies your PC for the newest graphics cards without adapters, at a price close to 114,000 IQD.
And for anyone who wants the same power but with clean internal cabling, an 850 W Gold fully modular unit with a PCIe 5.0 connector brings both together, at roughly 180,000 IQD.
For very high-end builds or for editing and rendering stations, a 1000 W Platinum unit gives you wide headroom, lower temperatures and quieter operation, also at a price close to 180,000 IQD.
The prices above are for guidance only, and the current price always appears on the product page itself. Every order goes out with cash on delivery and delivery to all Iraqi provinces, and you have the right to inspect the product before paying and confirm the model and the accessories.
Common mistakes to avoid
- Buying a no-name unit because the price is tempting: the wattage figures printed on it are usually not real.
- Relying on the PSU that comes free with a ready-made case, the number one cause of sudden restart failures.
- Overdoing it the other way: a 1200 W unit for a build that draws 300 W is money thrown away for nothing.
- Ignoring the UPS: voltage swings and repeated outages kill power supplies faster than anything else.
Frequently asked questions
Does higher wattage mean more electricity used?
No. The unit supplies only what the components ask for. A 1000 W unit in a PC that draws 350 W will pull 350 W from the wall plus the efficiency losses, not 1000.
How many years does a power supply last?
A good unit serves you 5 years or more and moves with you to your next build. That is why you should treat it as a long-term investment, not a one-off expense.
Do I need ATX 3.1 and PCIe 5.0?
If you plan to fit a modern graphics card with a 12V-2x6 connector, yes, it saves you the adapters and handles transient spikes better. On budget builds the traditional connectors are enough.
Can I move my old PSU to a new build?
You can, as long as it is under 5 years old, its wattage covers the new card, and it has the connectors you need. If it starts making a noise or giving off a smell, replace it immediately.
What is the first thing to check on delivery?
Confirm the model and the wattage printed on the box and on the unit itself, count the cables, and check that the carton is intact and unopened. Inspecting before paying is fully your right and takes one minute.
