PSU tier list 2.0

[Karadjgne]

Secondary labels don't mean much turkey, nothing actually runs on wattage. Everything runs on voltage and current. The gpu, being a piece of hardware, resistance is assumed to be a constant. Nominal voltage is 12v, but can run higher or lower, which is usually made up for by higher or lower amperage draw. Up to a point. So within the possible range of voltage and current, its much easier to simply state a gpu needs 300w instead of full specs of 11.5v to 12.3v at 26.2a to 24.7a etc

 

[turkey3_scratch]

Actually from what you say it does "require power" because 24.7*12.3 = 26.2*11.5

Also, another concept that confuses me, is what is the voltage a measure between? What two objects in the context of the power supply unit?

 

[_Joe_D_]

Just wanted to check, I'm getting an "EXDISPLAY S12G-650W" which I believe is the Seasonic S12G mentioned above (tier 2). I just wanted to check that A, it is the tier two mentioned above and B, it's enough for a gaming PC (Nvidia Gtx 980)

 

[_Joe_D_]

Ignore my previous question, it is not letting me delete it. I have found a part labelled "EVGA 650 GQ ATX Power Supply", but the list above says that in tier 1 it is a "EVGA Supernova GQ". I'm just being careful, so forgive me when I ask are they the same thing?

 

[turkey3_scratch]

The GQ 650 should be Tier 2 in my opinion. SUpernova GQ is the same as GQ.

That Seasonic would also be fine.

 

[superninja12]

let me take your gq for instance.
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story4&reid=454

i see a lot of green on the hot testing boxes is it that bad or what is it supposed to mean o0
on the g2 and gs series i see a nice small wire without spikes.

 

[turkey3_scratch]

That's my point, ripple and noise is somewhat high to be Tier 1. At least on the GQ 850W everything is Tier 1 worthy, but not the 650, and certainly not the 750.

 

[Deleted member 217926]

I didn't see this posted.

http://www.tomshardware.com/news/corsair-extended-psu-warranties-10,31576.html

Effective immediately Corsair has extended the warranty on the AXi, HXi, RMi and RMx from 7 years to 10 years. This applies retroactively to units already purchased so if you have one you get the warranty extension with no action on your part.

Great job Corsair!

 

[logainofhades]

They were probably tired of losing sales to Evga.

 

[turkey3_scratch]

I don't think it'll necessarily increase sales. G2 still has a price edge to the RMx.

 

[Someone Somewhere]

I have a good question, and I hope somebody has a good answer. Do components such as the graphics card require a specified amount of amperage or wattage when operating?

For instance, if we say the R9 390 requires 300W under load, then if you have a PSU that is outputting 11.5V (which would stink, but an example), then it'll be using a much larger amperage than if the PSU is outputting 12.1V.

Or is it the other way around? Does the R9 390 specifically require let's say 25A of current under load, making PSU #1 with its 11.5V actually decrease power consumption and PSU #2 increase power consumption?

Another way to put it: Does a PSU that outputs a higher voltage result in higher power consumption from a GPU?

The actual ICs (main ASIC, memory chips etc) will generally rapidly increase current with voltage - cube law or something.

A VRM on the card will output near-constant voltage to these chips, at whatever current they require - so they need to output a given power no matter the input voltage.

They'll draw whatever input current they need to output the needed current, whatever the input voltage. So if the input voltage goes down, they'll need to draw more current. Given buck converters are generally more efficient nearer the top of their design voltage, this means they'll probably draw more power (and a lot more current) the lower the input voltage is.

The gpu, being a piece of hardware, resistance is assumed to be a constant

You may assume this, but GPUs are by no means ohmic resistors.

Also, another concept that confuses me, is what is the voltage a measure between? What two objects in the context of the power supply unit?

Output ground wire to output +12V/+5V/whatever rail.

Or you may mean the input voltage, which would be the true RMS voltage between the two input pins, not to ground.

 

[superninja12]

discussion, seasonic g series should be tier 1 ,since the evga gq series are tier 1 too....

 

[turkey3_scratch]

When reading a ripple graph, it is crest to trough. So in this instance, would crest to trough be over 120mv? Look at the graph, you got a little green jaggedy that shoots upward, meaning if you take the absolute highest green value on here minus the absolute lowest green value, it is over 120mv. But on Jonnyguru, they say it is about 100mv. So I'm wondering what is the exact proper, standardized way to read these graphs.

I mean, technically the little spike would be noise if I'm correct, not ripple. But ATX specification calls for ripple + noise to be below 120mv for the 12V rail, not just ripple. So hopefully somebody can answer my question. To show you what I'm talking about here:

Edit: Oopsie doopsie, for some reason I was reading the graph wrong. I was thinking the upper and lower bounaries were 60mv. Yeah, that is clearly 100mv now that I see it more clearly.

 

[superninja12]

look at out hydro g fsp tier 1 poweruspply... http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story4&reid=456

 

[turkey3_scratch]

Superninja, OklahomaWolf zooms in a ton on graphs now. The Hydro G 750W performs very well. Hydro G deserves Tier 1. Well, maybe Tier 2 for the 750W unit because of voltage regulation, but the 12V rail is good, and that's what is important.

 

[superninja12]

ooh okay, what should be the max it can go out of the line turkey?

 

[turkey3_scratch]

For which rail? 12V rail max is 120mv. 3.3V and 5V rails are 50mv (same with 5VSB).

For voltages, 12V has to be between 11.4V and 12.6V. 5V between 4.75V and 5.25V. 3.3V between 3.14V and 3.47V. But in this case I'm talking about load regulation - from Test 1 to Test 5 how much the voltage drops, which is different than seeing how close to the boundaries the voltage is. Both are important, but sag (drop) is more important.

 

[superninja12]

thank you, i want to become a powersupply expert like you darkbreeze blackbird and more forum users.
still learning to know more about this magic box( no not other magic boxes).

 

[Darkbreeze]

As compared to actual experts, I cannot claim to be one, so don't bunch me up in that group. What I know about the inner workings of power supplies is probably about average, certainly not at any remotely expert level. I'd consider K0888, JG, Blackbird, a few others, to be experts. I'm just a power user.

 

[turkey3_scratch]

thank you, i want to become a powersupply expert like you darkbreeze blackbird and more forum users.
still learning to know more about this magic box( no not other magic boxes).

I love seeing people with your enthusiasm for learning more about PSUs. You remind me exactly of myself.

 

[turkey3_scratch]

Anybody know anything about the FSP Berserker 500W? Runs for $39.99

 

[RCFProd]

Anybody know anything about the FSP Berserker 500W? Runs for $39.99

Sparkle Power made PSU

*+3.3V & +5V total output does not exceed 123W *Maximum combined current for the +12V outputs shall be 34A * +12V2 peak current is 19A (less than 10ms), minimum voltage during peak is >11.0Vdc. * +5Vsb peak current is 3A (less than 500ms), minimum voltage during peak is >4.5Vdc.

http://www.sparklepower.com/pdf/PC/FSP500-60GMN.pdf

That's all the info I found.

 

[Darkbreeze]

That would be pretty unusual if Sparkle was making PSUs for FSP, since Fortron makes all their own units, and a bunch of them for other brands. It's more likely that FSP makes the platform and Sparkle has some of them branded as their own.

 

[RCFProd]

Sounds pretty confusing if true.

 

[tiny voices]

Well seeing as how it only makes 432w on the 12v rails and only comes with one 6+2 pin connector, I'm going to say its probably not a very good unit.