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Windows 7: PSU question

21 Jan 2010   #11
Fumz

7 Ultimate x64
 
 

Quote   Quote: Originally Posted by Zidane24 View Post
Quote   Quote: Originally Posted by pparks1 View Post
Based on your computer specs, a 450 is mostly likely going to be just fine and dandy. Although I do agree that cheap power supplies are usually not the best by any means.

I run quite a number of lab computers at work with Antec cases and 430 Watt Antec Basiq PSU's and they are fine. Most are dual and quad core boxes, with 4-8GB of RAM, 8600GT video cards, multiple NIC's, a DVD burner and a couple of hard drives.
That makes me question the actual necessity for these big power supplies out there
The necessity doesn't exist for most of the higher wattage PSU's... unless of course, if you're attaching a microwave to the rig; afterall, one cannot game without a tasty hot pocket, or two.

PC Power Consumption: How Many Watts Do We Need? - X-bit labs

**edit**

Although, the OP does need to increase his +12 volt amperage a bit.


My System SpecsSystem Spec
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21 Jan 2010   #12
Zidane24

Windows 7 Home Premium x64 - Mac OS X 10.6.4 x64
 
 

Quote   Quote: Originally Posted by Fumz View Post
Quote   Quote: Originally Posted by Zidane24 View Post
Quote   Quote: Originally Posted by pparks1 View Post
Based on your computer specs, a 450 is mostly likely going to be just fine and dandy. Although I do agree that cheap power supplies are usually not the best by any means.

I run quite a number of lab computers at work with Antec cases and 430 Watt Antec Basiq PSU's and they are fine. Most are dual and quad core boxes, with 4-8GB of RAM, 8600GT video cards, multiple NIC's, a DVD burner and a couple of hard drives.
That makes me question the actual necessity for these big power supplies out there
The necessity doesn't exist for most of the higher wattage PSU's... unless of course, if you're attaching a microwave to the rig; afterall, one cannot game without a tasty hot pocket, or two.

PC Power Consumption: How Many Watts Do We Need? - X-bit labs
I admit I bought a top of the line Corsair 850W about a year ago for around $100 and I can see that I didn't need it at all...

I fell for the "I need it just because I do" trap
My System SpecsSystem Spec
21 Jan 2010   #13
ignatzatsonic

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium SP1, 64-bit
 
 

Zidane:

Good idea to question it. That info is easily obtainable. It takes a major pile of components to actually draw say 400 from the wall socket.

But that isn't the consideration driving the purchase for those who buy the 600 watt supplies.

It seems other things come into play.


Hmmmmm...........what might that be??


Hmmmmmmm...........
My System SpecsSystem Spec
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21 Jan 2010   #14
computersplus

Windows 7 Ultimate 32 bit
 
 

I'd say a good 650 watt Corsair or something similar is good enough even for a demanding system
My System SpecsSystem Spec
21 Jan 2010   #15
Fumz

7 Ultimate x64
 
 

Quote   Quote: Originally Posted by Zidane24 View Post
... I admit I bought a top of the line Corsair 850W about a year ago for around $100 and I can see that I didn't need it at all...

I fell for the "I need it just because I do" trap
Yeah... but as far as traps go, that one ain't half bad.
My System SpecsSystem Spec
21 Jan 2010   #16
pparks1

Windows 7 Ultimate x64
 
 

People often over buy on their power supplies. Many have heard the advice that you shouldn't skimp on your power supply and they have REALLY taken it to heart.

Here is a link to a power supply calculator that I find very decent that will give you a very good idea of what is necessary: eXtreme Power Supply Calculator

Running my box through this tool came up with 294 watts. For reference sake that is an Intel Quad Core Q9550, with 8GB of RAM, Nvidia 9800GTX+ video card, DVD Burner, 1 7200RPM storage drive, 1 SSD drive, 3 x 120mm case fans, with 3 USB devices attached.

Needless to say, the Corsair HX620 that I bought is MORE than adequate. In fact, if I wanted to really load it up, I could do the following;

--Drop the single Nvidia 9800GTX+ and replace it with Dual ATI Radeon 5870's
--Add an addition 9 7200RPM hard drives onto the system
--Increase to 15 USB devices from the 3 that I quoted above
--Increase to 10 x 120mm case fans
--Add an additional 9 SSD hard drives, bringing my grand total up to 10

All of that comes out to exactly 620 watts.


With regards to my work test boxes, running them through the tool comes up to 220 watts. (so the 430 that my Antec 300 + BP 430 provides is more than enough : http://www.newegg.com/Product/Produc...82E16811129065

--Intel Core 2 Duo E8400 at 3.0ghz
--4 sticks of DDR2 RAM
--Two 7200 RPM hard drive
--Nvidia 8600GT video card
--2 x 120mm case fans
--Single DVD burner
--2 attached USB devices
--1 stand alone PCI NIC card in addition to onboard NIC card
My System SpecsSystem Spec
21 Jan 2010   #17
bobkn

Windows 7 Pro X64 SP1
 
 

Quote   Quote: Originally Posted by Zidane24 View Post
Quote   Quote: Originally Posted by pparks1 View Post
Based on your computer specs, a 450 is mostly likely going to be just fine and dandy. Although I do agree that cheap power supplies are usually not the best by any means.

I run quite a number of lab computers at work with Antec cases and 430 Watt Antec Basiq PSU's and they are fine. Most are dual and quad core boxes, with 4-8GB of RAM, 8600GT video cards, multiple NIC's, a DVD burner and a couple of hard drives.
That makes me question the actual necessity for these big power supplies out there
Depends.

Graphics cards with high power requirements (GTX295, Radeon 5970) can consume over 200W each. Some people use pairs of them in SLI or Crossfire. An overclocked CPU can also burn over 200W when fully loaded.

An 8600GT (above) gets all of its power through the PCI slot, so it consumes less than 75W. (According to one site, it's less than 40W.) A non-overclocked CPU draws about 100W, fully loaded.
My System SpecsSystem Spec
21 Jan 2010   #18
computersplus

Windows 7 Ultimate 32 bit
 
 

people started buying high wattage power supplies because companies would rate their units at say 450 watts but that was max wattage not constant output the constant output might only be 290 watts so in order to offset this you would have to buy one rated at 600 watts and then maybe you would have 450 watts constant output.

companies use this type of false advertisement all the time so you really need to know the in and outs of this stuff and stick with a name brand
My System SpecsSystem Spec
21 Jan 2010   #19
pparks1

Windows 7 Ultimate x64
 
 

Quote   Quote: Originally Posted by bobkn View Post
Graphics cards with high power requirements (GTX295, Radeon 5970) can consume over 200W each. Some people use pairs of them in SLI or Crossfire. An overclocked CPU can also burn over 200W when fully loaded.
I do agree with all of this. But I think far too often, people would look at that and say...well...that's 600 alone...so for everything else, I better get a 1,000w PSU.

However, run through the link to the PSU calculator and a Core i7 975, running dual 5970's in cross fire, with 6 sticks of DDR3 RAM, running 4 7,200RPM hard drives, with CPU at 100% TDP and 100% system load, with 1 DVD burner and 3 x 120mm case fans comes out to about 650 watts.

Quote   Quote: Originally Posted by bobkn View Post
An 8600GT (above) gets all of its power through the PCI slot, so it consumes less than 75W. (According to one site, it's less than 40W.) A non-overclocked CPU draws about 100W, fully loaded.
I realize this is not a high powered card. It's just for a test workstation at work...it's not a gaming machine by any means...it was one of the cheapest stand alone video cards that I could find at the time.

Quote   Quote: Originally Posted by computersplus View Post
people started buying high wattage power supplies because companies would rate their units at say 450 watts but that was max wattage not constant output the constant output might only be 290 watts so in order to offset this you would have to buy one rated at 600 watts and then maybe you would have 450 watts constant output.
Agreed...but they have continued this trend to this day with high quality power supplies as well. I've seen my share of 1,000 or 1,200 watt PSU's here from brands like Seasonic, Corsair and PC Power and Cooling. All very reputable power supply companies. For many of these rigs, that much power likely wasn't necessary. But I'm sure the mantra is "better safe than sorry".
My System SpecsSystem Spec
22 Jan 2010   #20
dorian hawkmoon

Windows 10 Pro (x64)
 
 

Based on the opinions presented here I'm considering CoolerMaster Extreme Power 460 Watt for my present rig. Any opinions?
My System SpecsSystem Spec
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