What would your dream Power Supply Unit have?

[Scott2010au]

What would your dream Power Supply Unit have?

The 'dream' PSU would have the following features (v1.3):

■ Be both ATX12V and EPS12V compliant
■ Silent running, or silent up to a specified loading
■ Have a 5 year warranty, ideally a 7 year warranty
■ Modular connectivity
■ Support for 'three' CPU sockets (in cable line, in case one fails), each requiring one 4/8 connection
■ Support for at least two video cards, each requiring 'up to' two PCIe 6/8 connections
■ Be at least 71% efficient at 40 watts load (anything less is unrealistic)
■ Be at least 80% efficient at 225 watts load and above (up to max spec), I would consider lowering this to 85 watts depending on build
■ Have ripple and noise that exceeds the ATX / EPS specifications (all of them, including 'lifted' retrospective future standards) by at least 20%, I mean 'exceeds' in the good way!
■ Has received non-fake 80 PLUS Certification (at least standard, or bronze)
■ Has received non-fake ATI Crossfire-X Certification
■ Has received non-fake NVIDIA SLI Certification

I will amend the above when replies are added.

 

[Scott2010au]

Oh, yeah, sorry, I was thinking: (1 / SqRt(2))

Anyways, was going over the links that Dadiggle provided, and one of them has a quite prominent efficiency graph: http://www.hardwaresecrets.com/fullimage.php?image=10583
On the page: http://www.hardwaresecrets.com/article/Understanding-the-80-Plus-Certification/742

If you extrapolate that graph out to a 40 watt load, then yeah, it'll probably be around 71% efficient.

How about that?

 

[hunter315]

In that case you are talking about a 5% load, if a system is idling at only 5% of its peak power draw its gots some massive power savings going on. Any system that needs a 750W unit will have at least one strong GPU(even the 5xxx series still pulls about 18W at idle) and a strong CPU, combined with some hard drives and other peripherials and you should be at about 80W at idle which really isnt much and considering how much more you save by being efficient at load its not worth wasting R&D money to support an unrealistically small load for such a large unit, if your system is only going to be pulling 40W why not get something like an Antec EA380D which wont loose nearly as much efficiency dropping down that far.

 

[cjl]

Oh, yeah, sorry, I was thinking: (1 / SqRt(2))

Ahh, that makes sense

 

[Scott2010au]

Yes, but Vsb is only 0.25 Amps at what, 12 Volts?

So that means a system can 'idle' (sleep) using only 3 watts.

Sure it's only an extra watt or two (due to efficiency reductions), but some PSUs are sleeping at ~ 15 watts - which is just wrong! (Maybe they have keyboard and mouse wake & power on enabled in the BIOS or something unusual and/or lazy!).

Environmentalists really take this too far!

 

[obsidian86]

my dream power supply would have 99% negative efficiency well we can dream hey