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How Many Watts PSU Should I Get?

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July 1, 2013 1:45:21 PM

Hey, My Coolmax cr-550b just died on me and it was working fine for about 6 months. Now, I'm wondering if the wattage was low and now aiming for 600w. I'm wondering what is the best bang for the buck PSU out there that is cheap but really reliable.

My hardware is:

- AMD Phenom ii x4 965 BE 3.4ghz(STOCK, NEVER OC'D)

- 4gb ddr2 ram

- nvidia gtx 650ti 2gb boost (superclocked)

- Asus M4a78 plus mobo

(3 case fans also)

Do you guys think 600 watts is enough for all of my components and hardware to be powered or no?

I'm confused with seasonic, corsair and lots of others. Anything is fine cause I'm kind of short on cash and want a good, but cheap one. It can be modular or non modular.

Thank you!

EDIT: Also, I'm going to add a hyper 212 cooler onto my cpu in the future. Just keep in mind that the hyper 212 cooler gets counted with the rest to see if 600w is enough.

More about : watts psu

July 1, 2013 1:55:11 PM

Or should I go for a 650w PSU?
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July 1, 2013 1:58:32 PM

You will be fine with 500 watts actually. That setup is not very power hungry...

If you are on a tight budget, I'd recommend the Corsair CX which are decent performers at a great price.

If you can afford to spend more money, the TX and above will give you better performance...
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a b ) Power supply
July 1, 2013 2:00:08 PM

IMHO, using a PSU that's "just big enough" is false economics. Heat is the enemy. The higher the wattage of a PSU the cooler it runs and the less the components are stressed. Think of the extra expense as an insurance policy. My advice: buy the highest wattage quality PSU you can afford. I prefer Seasonic.
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July 1, 2013 2:02:41 PM

King Hackintosh said:
You will be fine with 500 watts actually. That setup is not very power hungry...

If you are on a tight budget, I'd recommend the Corsair CX which are decent performers at a great price.

If you can afford to spend more money, the TX and above will give you better performance...


but if I wanted to overclock my cpu in the future wouldn't the 500w be pushed to the limit. I'm not good at calculating my power output. What is your best guess on how much watts are being outputted from all the components? I'm thinking of actually buying just another 550w psu then since you said 500w is still good. I guess it's because Coolmax sucks, maybe?

Anyways I may go for a corsair but still looking for more suggestions.
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July 1, 2013 2:03:11 PM

jacker300 said:
Hey, My Coolmax cr-550b just died on me and it was working fine for about 6 months. Now, I'm wondering if the wattage was low and now aiming for 600w. I'm wondering what is the best bang for the buck PSU out there that is cheap but really reliable.

My hardware is:

- AMD Phenom ii x4 965 BE 3.4ghz(STOCK, NEVER OC'D)

- 4gb ddr2 ram

- nvidia gtx 650ti 2gb boost (superclocked)

- Asus M4a78 plus mobo

(3 case fans also)

Do you guys think 600 watts is enough for all of my components and hardware to be powered or no?

I'm confused with seasonic, corsair and lots of others. Anything is fine cause I'm kind of short on cash and want a good, but cheap one. It can be modular or non modular.

Thank you!

EDIT: Also, I'm going to add a hyper 212 cooler onto my cpu in the future. Just keep in mind that the hyper 212 cooler gets counted with the rest to see if 600w is enough.


I recommend this one: http://www.newegg.com/Product/Product.aspx?Item=N82E168... it's more than enough for your build and if you want to upgrade your GPU/CPU later or any OC, it will suffice. Right now, its 15% off.
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July 1, 2013 2:04:44 PM

ram1009 said:
IMHO, using a PSU that's "just big enough" is false economics. Heat is the enemy. The higher the wattage of a PSU the cooler it runs and the less the components are stressed. Think of the extra expense as an insurance policy. My advice: buy the highest wattage quality PSU you can afford. I prefer Seasonic.


From my setup do you think 550 watts was more than enough but it's because the PSU was faulty? Or do you think I should go for 600w? My theory is putting it exactly on how much it outputs makes it seem like it stresses the PSU too much. That's just me. Correct me if I'm wrong.

In your opinion do you think I should get a 550 watts? again or a 600 watts?
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July 1, 2013 2:07:02 PM

aredflyingbird said:
jacker300 said:
Hey, My Coolmax cr-550b just died on me and it was working fine for about 6 months. Now, I'm wondering if the wattage was low and now aiming for 600w. I'm wondering what is the best bang for the buck PSU out there that is cheap but really reliable.

My hardware is:

- AMD Phenom ii x4 965 BE 3.4ghz(STOCK, NEVER OC'D)

- 4gb ddr2 ram

- nvidia gtx 650ti 2gb boost (superclocked)

- Asus M4a78 plus mobo

(3 case fans also)

Do you guys think 600 watts is enough for all of my components and hardware to be powered or no?

I'm confused with seasonic, corsair and lots of others. Anything is fine cause I'm kind of short on cash and want a good, but cheap one. It can be modular or non modular.

Thank you!

EDIT: Also, I'm going to add a hyper 212 cooler onto my cpu in the future. Just keep in mind that the hyper 212 cooler gets counted with the rest to see if 600w is enough.


I recommend this one: http://www.newegg.com/Product/Product.aspx?Item=N82E168... it's more than enough for your build and if you want to upgrade your GPU/CPU later or any OC, it will suffice. Right now, its 15% off.


Lol, funny thing was I was searching on newegg about 3 minutes ago and saw that power supply. You believe 550w was more than enough for my build and it was just my PSU was faulty? You think I should go for a 550w or a 600w?
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July 1, 2013 2:08:12 PM

I'd get the 600 watt corsair CX600M modular power supply which will give you ample room for overclocking and expansion...
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Best solution

a c 1193 ) Power supply
July 1, 2013 2:08:58 PM

For a system using a single GeForce GTX 650 Ti BOOST graphics card NVIDIA specifies a minimum of a 450 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 24 Amps or greater and that has at least one 6-pin PCI Express supplementary power connector.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Total Combined Continuous Power/Current Available on the +12V Rail(s) rated at 45°C - 50°C ambient temperature, is the critical factor.

Overclocking of the CPU and/or GPU(s) may require an additional increase to the maximum combined +12 Volt continuous current ratings, recommended above, to meet the increase in power required for the overclock. The additional amount required will depend on the magnitude of the overclock being attempted.

The XFX Core Edition PRO550W (P1-550S-XXB9), with its maximum combined +12 Volt continuous current rating of 44 Amps and with one 6-pin and one (6+2)-pin PCI Express supplementary power connectors, is way more than sufficient to power your system configuration with a single GeForce GTX 650 Ti BOOST graphics card.

Your old dead Coolmax was a problem waiting to happen and then it did.
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a b ) Power supply
July 1, 2013 3:15:50 PM

jacker300 said:
ram1009 said:
IMHO, using a PSU that's "just big enough" is false economics. Heat is the enemy. The higher the wattage of a PSU the cooler it runs and the less the components are stressed. Think of the extra expense as an insurance policy. My advice: buy the highest wattage quality PSU you can afford. I prefer Seasonic.


From my setup do you think 550 watts was more than enough but it's because the PSU was faulty? Or do you think I should go for 600w? My theory is putting it exactly on how much it outputs makes it seem like it stresses the PSU too much. That's just me. Correct me if I'm wrong.

In your opinion do you think I should get a 550 watts? again or a 600 watts?


It's a simple rule. The more headroom the better. There's no doubt in my mind that your PSU failure was accelerated by stress. They all are. Personally, I try never to load my PSUs over 50% of rated wattage, hence I would use a 750 watt in your situation but I can afford a 750watt. If you can't then buy the highest wattage QUALITY PSU you can afford.
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July 2, 2013 8:13:26 AM

I really disagree with a lot of what ppl have written here. Granted I don't know much about these matters, I believe that you want a quality PSU that fits your wattage, than a medicocre one that exceeds it. Any energy that is lost in the convesion between the wall outlet and your parts, turns directly into heat on your PSU, causing fan noise and heat for your case.

I'd get a high end 450w or 550w from Seasonic, before a large PSU with average parts.
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