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PSU for HIS 6850 and Phenom II X4 955

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December 1, 2010 6:13:05 AM

Hi there!

On this middle December, I would like to build a computer rig. This rig is total for gaming. Here is the components:

CPU: AMD PHENOM II X4 955 3,2Ghz
GPU: HIS Radeon HD 6850 1GB DDR5
Mobo: Biostar TA880GB (AM3, AMD880GX, DDR3)
RAM: Patriot DDR3 Gamer Series Dual Channel PC10660 4GB CL7 - PGS34G1333LLKA (For AMD)
HD: Seagate 500GB SATA
Casing: VenomRX Taipan
Optical Drive: *not yet decided, but I`ll buy 1 DVD drive on whatever brand and a cheap one

So, what PSU I should take?

On first thought, I plan to buy:
Amacrox Free Earth 88 500W

As you see, this PSU has 88% efficiency, and so the output on the system would be around 440W, yet I don`t know the system power consumption. Is this PSU sufficient to hold the system?

I would like you to notice that:
-I won`t overclock this rig
-I won`t do Crossfire either
-And my house electricity is 900W, so buying a 600W PSU would be kicking really hard. If there`s none of 500W PSU that could suit this rig, I plan to rearrange this rig into some "green" rig.

Many thanks for the reply!

More about : psu 6850 phenom 955

a b ) Power supply
December 1, 2010 7:22:00 AM

The PSU doesn't take more power than it's needed for the system. If a system needs 350W that what any PSU will take from the socket.
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December 1, 2010 8:58:25 AM

Well, I found that in extreme peak power consumption, 955 and HIS 6850 both could suck about 400W, and I think the system may be unstable. What I wanna ask is, could PSU that supply about 440W on system could hold the things right?

Thx for the reply!
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a b ) Power supply
December 1, 2010 10:03:00 AM

Where are you buying from?
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Best solution

December 1, 2010 12:05:13 PM

I guarantee your house has more than 900watts on a circuit. Even houses built in the early 1920's have 15 amps per circuit.

Watts does not equal Amps! Watts is a misleading term when referring to overall power consumption. You have to do a little math to figure how much power you are actually using.

With a full load, your current hardware is using at most 38volts. If you maxed out your 500watt power supply you would still only be using 13amps!

Obviously, a system is never running at full tilt or otherwise my 900watt psu would trip my circuit breaker at 15amps.

Thus, you won't need a new power supply.

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December 2, 2010 6:24:40 AM

ahthurungnone said:
I guarantee your house has more than 900watts on a circuit. Even houses built in the early 1920's have 15 amps per circuit.

Watts does not equal Amps! Watts is a misleading term when referring to overall power consumption. You have to do a little math to figure how much power you are actually using.

With a full load, your current hardware is using at most 38volts. If you maxed out your 500watt power supply you would still only be using 13amps!

Obviously, a system is never running at full tilt or otherwise my 900watt psu would trip my circuit breaker at 15amps.

Thus, you won't need a new power supply.


Well, I don`t really know amps in my house, but what math I had to do?

P=V.I ?

Yeah, I already calculate, it about 13amps (with math). But, I wonder that I just could use 1 lamp and 1 TV turning on with only 15amps supports?

And really, I just can`t conclude that the Amacrox could support the system. I need an answer yes or no with good explanation about this PSU. :( 
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December 2, 2010 11:32:52 PM

Hey guys. I'm building rig similar to the OP.

http://www.newegg.com/Product/Product.aspx?Item=N82E168...
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
http://www.newegg.com/Product/Product.aspx?Item=N82E168... (unlocked to X4)
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
http://www.newegg.com/Product/Product.aspx?Item=N82E168... (upgrade from 4550)
Re-Using Keyboard, Monitor (1600X900), HD (5400RPM), DVD drive, got a bunch of cheap fans, and I will get better than stock CPU cooler.
Any suggestions? Thoughts?
Will my power supply supply adequate power? Will I have room for overclocking?
Already bought PSU, so cant return ):
Any suggestions for CPU cooler?

Thanks. All feedback appreciated.
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December 3, 2010 12:05:25 AM

Spend a little extra and get a Corsair or Seasonic psu. I know you all might be on a budget, but buying a cheap power supply is asking for problems, especially if you plan on gaming. You can grab a 500w+ from either company for around 60.00 dollars.

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December 7, 2010 10:17:54 AM

Okay, took your advice and ordered a 700w OCZ from Newegg. Modular!
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
And a Lite-On DVD drive for about $20.
This way I'll have plenty of room for overclocking my graphics, CPU, etc.
How is Cooler Master's Hyper 212 Plus for a CPU cooler? I can get it and some arctic silver goo for under $35. I dont want to overclock with stock.
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December 7, 2010 10:21:05 AM

Oh, and should I get this: http://www.newegg.com/Product/Product.aspx?Item=N82E168...
XFX 5850 with nice rebate to $185
or:http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Gigabyte 6850 without rebate once its in stock.

5850 has more raw specs, but also uses tons more power. But power won't be an issue soon. 6850 also has some optimized things, and some other things that make it good that I didn't commit to memory. I'm torn. And the Catalyst 10.12 update should help the 6850 nicely. Ill wait for some results of 10.12 before I buy anything.
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December 7, 2010 10:24:28 AM

And one last thing...
How will Amazon take my PSU? I've filed it as defective having too short cords lol and I will send it back once I get my new one this week. I did buy it from Amazon, and i might have to send it back in a Newegg box haha!
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December 7, 2010 10:35:49 AM

Sorry, buy I just reread the OP. PSUs take as much power from the wall as they need, and spit into your computer the advertised amount (500w in your case). Correct me if I'm wrong, but you should get your 500w, and take from the wall... 555w? Is that right? And don't worry about your house's power. My dad had to use a 15 amp corded drill on the same circuit as 2 computers. So 15 amps is 900w? and 2 semi-idle computers is around 500w total? so 1400w. Your house has PLENTY of power for a computer and a TV.

And for a DVD drive, if you buy at Newegg, http://www.newegg.com/Product/Product.aspx?Item=N82E168... Its cheap.
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December 7, 2010 11:23:32 AM

Yes because psu's not being a hundred percent efficient, you will draw more juice from the wall than the computer is actually using.
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March 15, 2011 2:22:05 AM

Hi guys, sorry for not in a touch for a long time.

Actually, I already bought the rig on the end of Desember. There`s some change in these component from my first plan. In the end, I bought:

CPU: AMD PHENOM II X4 965 3,4Ghz
GPU: HIS Radeon HD 6850 1GB DDR5
Mobo: Biostar TA890GXB HD (AM3, AMD890GX, DDR3)
RAM: Team Elite DDR3 PC10600 1333Mhz Dual Channel 4GB (2x2GB) 9-9-9-24 - TED30496M1333HC9DC
HD: Seagate 500GB SATA
Casing: VenomRX Hardwicke
Optical Drive: using my sister`s external optical drive

And for PSU, my final decision is: Amacrox Free Style 85+ 550W

Amacrox is not a cheap PSU. It`s as expensive as Corsair CX Series 600W. Because Amacrox is a new brand and only released on east region (in my case, Asia), maybe people from west region just unfamiliar with this brand. So, here goes my review.

When the rigs is assembly in computer shop, the rigs run the test drive without problem. When I brought it to my house and test it, the electricity went down.

Guys, really, this is what I feared from the very first.

So I decided to "black-out" my house. I pull out all the electrical plug in my house, without exception, just to make sure there`s nothing could suck the electricity but my computer. When I try to turn on my computer again, the same thing happen.

Feeling frustrated, I try the same thing over and over again, and a miracle happen! My computer is turning on! But, when I turn off the PSU (there`s a switch on the PSU back), and try to turning on again, the electricity went down again. Using the same technique over and over again, some what my computer could turning on again.

So my thought come to conclusion: this PSU really suck electricity when start up. I discuss my problem with my friend, and they said they once had a similar problem, but come to end when they buy something called "soft starter"

I buy soft starter for around $2, and with a little bit modification, the PSU finally doing right when try to start up and soft starter does`nt heat at all. In this two months, there`s no smell burn, no freaking heat, no electricity down, no nothing. I had great time with this rig, and love it very much. :love: 

Problem solved. Thanks to you all!
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March 22, 2011 11:10:38 AM

Best answer selected by SesatZ.
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