How Much Watts?

[truest]

So I recently bought all these pc components from newegg, but didn't get a PSU or MOTHERBOARD (because I thought my friends MSI 790Gx & Antec 750w True Power would work, but it didnt).

I was wondering how much watts do I need here are the details.
mobo - havent bought yet, maybe the msi 790x/gx/fx
cpu - amd phenom x4 955 BE
3 HDD - 500 g / 70 g / 50 g
gpu - XFX 4890 (requires 500 w power supply)
hp - dvd/cd burner
case - antec 900 w/ cold cathodes

Will a 700w power supply suit my needs? Because if so I am looking into buying this PSU
http://www.newegg.com/Product/Product.aspx?Item=N82E16817341019

Is it worth it? Its one of the cheapest PSU by a respected company with a decent amount of Watts - 750.

Is this PSU any good? Will it satisfy my needs or do I need to up the Watts on a PSU I want to buy?

PROMO ENDS 12/5 LET ME KNOW ASAP

 

[jsc]

The 700 watt OCZ will have more than enough power.

 

[truest]

Even if im overclocking? (not the OC switch on MSI, but through BIOS)

 

[blackhawk1928]

Yep . It wil easily handle that, even a 600watt would do fine.

 

[JohnnyLucky]

The general rule of thumb is a high quality 500 to 550 watt power supply with sufficient current (amps) on the 12 volt rail(s) can easily power a system with any single video card made. A high quality 700 to 750 watt power supply with sufficient current (amps) on the 12 volt rail(s) can power a system with two video cards operating in dual mode. There are a few exceptions like the new ATI Radeon HD 5XXX series cards which use less power due to their energy efficiency.

A high quality 500 to 550 watt psu will have a +12 volt rail rated at 40 amps. A high quality 700 to 750 watt psu will have a +12 volt rail rated at 60 amps.

In addition the power supply should be at least 80+ Bronze certified for energy efficiency.

Before purchasing a new psu you will need to decide whether you will eventually have a pc with one or two video cards.

Corsair, PC Power & Cooling, and Seasonic are some of the brands that have a reputation for high quality power supplies that consistently earn high marks in technical reviews. They are reliable, stable, and come with a 5 year warranty. Some of the newer models come with a 7 year warranty. Lately we've been seeing a few other brands offering some high quality units. An example would be the Antec Earthwatts series which is an improvement over Antec’s older series psu’s.

 

[truest]

If I do not plan to upgrade to 2 graphics card, then will this PSU be sufficient? I might just get a GIGABYTE GA-MA770T (NOT CROSSFIRE READY) and stick to my 1 graphics card.

But, if I do plan to crossfire (2x 4890's), would this power supply be sufficient?

 

[JohnnyLucky]

Yes and Yes.

 

[truest]

Thank you very much. I will buy this $50 PSU. 700 Watts, now I just need a motherboard D:

 

[stuporman]

I've got the same CPU, graphics card & case, plus have five cooling fans, and two DVD-RW. I have a 700 PSU and the system works no problem at all. MAke sure you get a modular PSU - much neater and better airflow.