any power supply with at least 175 watts
Remove and replace the power supply.
You need to know what kind of voltage all your computer parts work at. There's not really a general Watt power supply that you should look for.
No. A power supply has to power all componets in a computer - processor, disk drives, optical storage, memory. So, a power supply has to be more powerful. Exact value depends on how much power all components use.
Yes you can, but there is a lot more to it then that, you need to know what power connectors are on the motherboard, so you should buy one that is made for your model if you don't know motherboards. If its a dell, hp, ect, you can go online and find a site that asks for the brand and model and will give you a few choices of PSU's to use, or get it from the MFG. You just can't under supply the computer.
yes it will i am running a zotac nvidia geforce 9500 gt on a dell 300 watt power supply and it reqired a 350 watt i have had it for more than 4 months now still runs like a dream
This is pushing it, but it might be possible. If the PC has a 550 Watt power supply, then if you monitor pulls 250 Watts or less, it should work. You would likely do better if you had a LED/LCD monitor with this PC and backup power supply. Of course, the 550 Watt power supply shouldn't be pulling that all the time.
it should be enough i think if u have money go for 600 watt it will be better
Yes, "Watt" should be capitalized when referring to the unit of power, named after James Watt.
There is a 750 watt power supply and an 850 watt power supply. Both have gotten excellent customer ratings at various websites. I would check the specification compliance and voltage/frequency requirements that came with your device.
it will burn do not do it or your pc or maybe your house will be in fire
The inverter should supply at least 1 kW and if it is for extended use more than 4-5 minutes it should supply 1.5 kW.
Yes you should be fine. As long as it fits in the computer, you're fine. Replace the old with the new one but keep the old one in case the new one doesn't work! 300 watts is fine for replacing something smaller. You should run only one power supply at a time. What this means is that you should replace the 185 Watt supply with the 300. Having 2 separate power supplies creates the possibility of having slightly different values for ground, +5V, and +12V DC. This can cause problems with all of your computer components. Don't use both, replace the old one with the better one. <- There are some motherboards that REQUIRE two power supplies, but you probably don't have one. They're server mb's, and the reason you use dual supplies is, if one supply dies the computer uses the live one and notifies the system operator "one supply just cooked, get me a new one pls." This eliminates a point of failure. If you've got one of these mb's, both supplies have to be the same: two 300w, two 750w, whatever. Really, though, with the amount of juice some of these new video cards pull, I wouldn't even consider installing a 300w power supply in anything except a server, a lot of which are "headless"--they don't have video outs, you control them over your network. Go with at least a 500w supply, and if you might have the need for a dual-head system--two monitors are GREAT, don't let anyone tell you different--go with a 1200w supply.