Reccomend a SLI powersupply

[Howard]

Originally posted by: JEDIYoda

Originally posted by: Seer
LuckyBoy1 Scroll down and look at this graph:

http://www.silentpcreview.com/article28-page4.html

Most powersupplys have an efficiency curve like that that peaks somewhere in the middle like that. At lower watts, however, the large power supplies are more inefficient. Inefficiency ~= heat. (is proportional to). So, the large ones are actually working harder, drawing more watts from the wall, putting out more heat, to deliever the same wattage.

Bigger is not always better.

Actually thats not entirely true...
that graph is NOT true of all brands...
There are other variables top consider too...
Would you rather have a PSU whose rated 90% efficient but was rated at 25c??
Or a PSU whose 70% efficent but who PSU was rated for 50c ?

See my point??

Stipulating that the temperature behaviour of two PSUs are equal, their highest efficiency will most likely be at 75% load or somewhere near there. For a given load, then, the more efficient PSU will be the one operating at 75% and not a lower %.

 

[JEDIYoda]

Originally posted by: Howard

Originally posted by: JEDIYoda

Originally posted by: Seer
LuckyBoy1 Scroll down and look at this graph:

http://www.silentpcreview.com/article28-page4.html

Most powersupplys have an efficiency curve like that that peaks somewhere in the middle like that. At lower watts, however, the large power supplies are more inefficient. Inefficiency ~= heat. (is proportional to). So, the large ones are actually working harder, drawing more watts from the wall, putting out more heat, to deliever the same wattage.

Bigger is not always better.

Actually thats not entirely true...
that graph is NOT true of all brands...
There are other variables top consider too...
Would you rather have a PSU whose rated 90% efficient but was rated at 25c??
Or a PSU whose 70% efficent but who PSU was rated for 50c ?

See my point??

Stipulating that the temperature behaviour of two PSUs are equal, their highest efficiency will most likely be at 75% load or somewhere near there. For a given load, then, the more efficient PSU will be the one operating at 75% and not a lower %.

well thats a given....
I purposely made no such stipulations!!

 

[Howard]

Originally posted by: JEDIYoda

Originally posted by: Howard

Originally posted by: JEDIYoda

Originally posted by: Seer
LuckyBoy1 Scroll down and look at this graph:

http://www.silentpcreview.com/article28-page4.html

Most powersupplys have an efficiency curve like that that peaks somewhere in the middle like that. At lower watts, however, the large power supplies are more inefficient. Inefficiency ~= heat. (is proportional to). So, the large ones are actually working harder, drawing more watts from the wall, putting out more heat, to deliever the same wattage.

Bigger is not always better.

Actually thats not entirely true...
that graph is NOT true of all brands...
There are other variables top consider too...
Would you rather have a PSU whose rated 90% efficient but was rated at 25c??
Or a PSU whose 70% efficent but who PSU was rated for 50c ?

See my point??

Stipulating that the temperature behaviour of two PSUs are equal, their highest efficiency will most likely be at 75% load or somewhere near there. For a given load, then, the more efficient PSU will be the one operating at 75% and not a lower %.

well thats a given....
I purposely made no such stipulations!!

that graph is NOT true of all brands...

So which brands are have a flat efficiency curve with respect to load?

 

[JEDIYoda]

Originally posted by: Howard

Originally posted by: JEDIYoda

Originally posted by: Howard

Originally posted by: JEDIYoda

Originally posted by: Seer
LuckyBoy1 Scroll down and look at this graph:

http://www.silentpcreview.com/article28-page4.html

Most powersupplys have an efficiency curve like that that peaks somewhere in the middle like that. At lower watts, however, the large power supplies are more inefficient. Inefficiency ~= heat. (is proportional to). So, the large ones are actually working harder, drawing more watts from the wall, putting out more heat, to deliever the same wattage.

Bigger is not always better.

Actually thats not entirely true...
that graph is NOT true of all brands...
There are other variables top consider too...
Would you rather have a PSU whose rated 90% efficient but was rated at 25c??
Or a PSU whose 70% efficent but who PSU was rated for 50c ?

See my point??

Stipulating that the temperature behaviour of two PSUs are equal, their highest efficiency will most likely be at 75% load or somewhere near there. For a given load, then, the more efficient PSU will be the one operating at 75% and not a lower %.

well thats a given....
I purposely made no such stipulations!!

that graph is NOT true of all brands...

So which brands are have a flat efficiency curve with respect to load?

You see you are looking for an argument when I made a valid statement......that graph is
not true of all brands.....
Think about it...
For that graph or any graph as such to be true of all brands all brands would have to have been constructed and made and tested by shall we say a set industry standard that does not yet at present exist? true...false..

Then you would think that by asking the question--So which brands are have a flat efficiency curve with respect to load? You should be able to get a concrete answer one way or the other...
Nope..won`t happen.....again becuase there are no set industry standards in regards to how a given PSU is tested.....

From one reviewer to the next the efficiency of a given PSU has been and is often different than the previous reviewers review...

 

[Howard]

Originally posted by: JEDIYoda

Originally posted by: Howard

Originally posted by: JEDIYoda

Originally posted by: Howard

Originally posted by: JEDIYoda

Originally posted by: Seer
LuckyBoy1 Scroll down and look at this graph:

http://www.silentpcreview.com/article28-page4.html

Most powersupplys have an efficiency curve like that that peaks somewhere in the middle like that. At lower watts, however, the large power supplies are more inefficient. Inefficiency ~= heat. (is proportional to). So, the large ones are actually working harder, drawing more watts from the wall, putting out more heat, to deliever the same wattage.

Bigger is not always better.

Actually thats not entirely true...
that graph is NOT true of all brands...
There are other variables top consider too...
Would you rather have a PSU whose rated 90% efficient but was rated at 25c??
Or a PSU whose 70% efficent but who PSU was rated for 50c ?

See my point??

Stipulating that the temperature behaviour of two PSUs are equal, their highest efficiency will most likely be at 75% load or somewhere near there. For a given load, then, the more efficient PSU will be the one operating at 75% and not a lower %.

well thats a given....
I purposely made no such stipulations!!

that graph is NOT true of all brands...

So which brands are have a flat efficiency curve with respect to load?

You see you are looking for an argument when I made a valid statement......that graph is
not true of all brands.....
Think about it...
For that graph or any graph as such to be true of all brands all brands would have to have been constructed and made and tested by shall we say a set industry standard that does not yet at present exist? true...false..

Then you would think that by asking the question--So which brands are have a flat efficiency curve with respect to load? You should be able to get a concrete answer one way or the other...
Nope..won`t happen.....again becuase there are no set industry standards in regards to how a given PSU is tested.....

From one reviewer to the next the efficiency of a given PSU has been and is often different than the previous reviewers review...

Are you saying that there are PSUs that are less efficient between 60%-90% load than at 100% load and 0-60% load? Because that's what those graphs indicate.

 

[freethrowtommy]

Seasonic S12-600... I got one and can vouch... awesome supply!

 

[PSUPef2k]

Originally posted by: freethrowtommy
Seasonic S12-600... I got one and can vouch... awesome supply!

I am between that and an OCZ Powerstream 520...

OCZ has gotten no love in this thread though. The OCZ is quality, and also has most of the cords wrapped in mesh. The S12 has no wrapping which I would honestly prefer. I know not a good reason, but I am trying to keep the build as clean as possible. Many do recommend the S12-600 though.

 

[Pens1566]

Originally posted by: PSUPef2k

Originally posted by: freethrowtommy
Seasonic S12-600... I got one and can vouch... awesome supply!

I am between that and an OCZ Powerstream 520...

OCZ has gotten no love in this thread though. The OCZ is quality, and also has most of the cords wrapped in mesh. The S12 has no wrapping which I would honestly prefer. I know not a good reason, but I am trying to keep the build as clean as possible. Many do recommend the S12-600 though.

No complaints about my powerstream 520 here. Running 3 HDs, 2 DVD burners, floppy/combo reader, 7800GT CO, 4 120mm case fans, 120mm Panny cpu fan. Never budges more than .03 volts off any of the rails. Nice and quiet too.

 

[lotus503]

Ill chime in

I have owned a lot of different supplies and was always trying to calculate what I would need.

Taking misc power reqs you see for different componets I thought it impossible to build my shuttle rig and actually have it work with the Shuttle 350 watt. To my amazement it works fine, I was shocked.

I didnt used to think I was overpowering for what I had, but since this shuttle runs everything fine off a 350

 

[CP5670]

Originally posted by: PSUPef2k

Originally posted by: freethrowtommy
Seasonic S12-600... I got one and can vouch... awesome supply!

I am between that and an OCZ Powerstream 520...

OCZ has gotten no love in this thread though. The OCZ is quality, and also has most of the cords wrapped in mesh. The S12 has no wrapping which I would honestly prefer. I know not a good reason, but I am trying to keep the build as clean as possible. Many do recommend the S12-600 though.

I think the OCZ hasn't been recommended so much due to the price hikes on it back in December. It used to be close to $100, but it's not such a great deal anymore at the $140 that most sites have been selling it for since then. Although it looks like Monarch has come down on the price in the last week or two; for $120 it's definitely worth a look.

 

[PSUPef2k]

how about this?

http://www.ewiz.com/detail.php?name=PS-EN0560G

99 bucks. It's modular though.