FRIHOST FORUMS SEARCH FAQ TOS BLOGS COMPETITIONS
You are invited to Log in or Register a free Frihost Account!


Power Supply Units - simple question





tony
Does it hurt to use a power supply unit with higher wattage than the motherboard and graphics card require?
Helios
If you have a stronger power supply than your video card (or any other device) requires, you certainly can use it Smile
I'll try to explain, correct me if I'm wrong:
Wattage equals voltage multiplied by current. On the rail which is connected to the device, you have a fixed voltage (+12V in this case). Wattage will be determined by the amount of current used by the device. In your case, the amount of current will be inside the safe zone (because your PSU is stronger - can provide more current if needed), thus no damage will be done. Not only that, but your device will work better than it would've worked with a weak PSU.
What can hurt though (or just don't work), is a PSU which provides the minimum (or lower) required by the device.
tony
ah; sounds great. now i just wonder how much wattage I need...

I will be building a system soon with...

this mobo: http://www.newegg.com/Product/Product.aspx?Item=N82E16813128034
and this GPU (only 1; not using SLI): http://www.newegg.com/Product/Product.aspx?Item=N82E16814130085

does anyone know what the minimum wattage would be for this combo? i dont see information on it in the specs...
ForceRun
More is better in my book. I use a 650Watt even though my system is a single gpu. I'm even thinking that I should get a more powerful PSU. For most systems 500Watt is just fine. If you are going for powerful gaming system I would get a 750Watt. Having a PSU problem is a real pain and sometimes hard to track down.
Helios
Hey, wattage isn't everything! What about efficiency, stability, protections?
More is better in my book as well, but more money, not wattage ;)

For the combo above, I'd say some quality 400W Enermax Liberty or maybe some 500W Thermaltake will be OK.
Related topics
if your computer not starting............
Hard disk failed after the power supply got fried
Simple Question
is my power supply broken?
dual power supply- any idea?
How much difference between 430W and 500W power supply?
Which power supply you recommend/have?
Power supply problems
power supply confusion
A simple question !!, Will this hosting support Trac ?
Do I need a more powerful Power Supply?
Silent power supply for computer?
Video card and power supply question
noise from the power supply
Reply to topic    Frihost Forum Index -> Computers -> Hardware and Electronics

FRIHOST HOME | FAQ | TOS | ABOUT US | CONTACT US | SITE MAP
© 2005-2011 Frihost, forums powered by phpBB.