SeaSonic X750 Low 5v, 12v Drops Gaming

revin · Apr 30, 2012

I thought my FSP FX700GLN was nearing EOL so I got the Seasonic X750 to start fresh, but I'm very disapontied that the 5v rail is never at 5v, it stays at 4.9530-4.9915.

Now the 12v drops to 11.9540 when gaming.
I really thought it was going to have "better" output than this, ie atleast the "rated voltages"

The FSP NEVER dropped below "Rated", but was starting to have more devaition,ripple what ever it's called.

I get a Lemon??? :wtf:

Arrakis9 · Apr 30, 2012

I would contact seasonic and RMA it, the X series gold have very high rated reviews and my x650 has been running under a high ambient for 2 years now, still hasn't failed me

Batou1986 · Apr 30, 2012

You do realize that software voltage monitoring is not very accurate hence the reason high end motherboards have voltage test points now.
That amount of voltage drop has no impact whatsoever except in extreme circumstances ie LN2 world record attempts.

I say its fine my 12v and 5v have always fluctuated ± .100v~.200v since the day i got this PSU 4 years ago.

theonedub · Apr 30, 2012

A fraction of a % drop under load is well within normal operating range for that PSU. I don't see a problem.

Arctucas · Apr 30, 2012

And, those voltages are well within accepted tolerances.

revin · Apr 30, 2012

But why did my "4" Rail FSP never go under 12v, and always had 5.xxx volts where as I'm under 5v constantlly never at or over 5v.

Is this possable the way the "Gold" standard works?
In the SS litiature it states this is "Pull" unit ie the system Pull's the power from it??????

I guess I was expecting a "Higher{?}" voltage output from this newer technology.

I'm kind freaking out here :confused:

entropy13 · Apr 30, 2012

How are you measuring the voltages?

revin · Apr 30, 2012

Same as before, Intel XTU.
And please before the "software" battle insues, as Dave has said it is really one of the best program's avaiable for the Intel board's.

With the ONLY factor being changed, the PSU, it clearly shows that it is "outputing" less voltage than the FSP, BUT it IS more STABLE. With that said

I'm just worried that it's "under" volting to some extent on 2 rails ........................

Jstn7477 · Apr 30, 2012

ATX spec says all rails must be between +/- 5% of their rated values. That means 12v can't be less than 11.40v or greater than 12.60v, 5v can't be less than 4.75v or greater than 5.25v, and 3.3v can't be less than 3.18v or greater than 3.46v.

Your "deviation" is less than 1%. Your worries are pretty much pointless considering you're using the motherboard's sensors to measure voltage and you don't have an oscilloscope to measure the waveforms of the DC output. Being worried about this is like being worried that a Sandy Bridge CPU is going to prematurely fail because the base clock is running at 99.8MHz instead of 100.0MHz.

If anything, the deviation in your home's AC line voltage would probably scare you if you're concerned about your PSU's rails being a fraction of a percent under perfect voltages that you aren't measuring with professional equipment.

revin · Apr 30, 2012

So as in my post #6, is this the way the new PSU's act?

Stress testing dont effect the same as Gaming.............

I'm just stating the obvious differance noted after getting a "Gold" vs old ATX2.2 PSU

I expected more I guess, I mean I got a High-End PSU, you would think it would at least keep the "stated" voltages better than an old unit?!?!?!?!?!?! :mad:

Batou1986 · Apr 30, 2012

revin said:
So as in my post #6, is this the way the new PSU's act?

Stress testing dont effect the same as Gaming.............

I'm just stating the obvious differance noted after getting a "Gold" vs old ATX2.2 PSU

I expected more I guess, I mean I got a High-End PSU, you would think it would at least keep the "stated" voltages better than an old unit?!?!?!?!?!?!

The more likely case then the old psu being better is that it was actually worse, and by that i mean it was less capable of regulating the voltage and was actually feeding your board more power then it needed.

Throwing the software not being accurate argument off the table, the voltage loss that you are seeing is such a small amount that the only way to truly see if the new one is "worse" then the old one would be to bust out a scope and test them both.

Also if you want to run a stress test that will use more power then any game try OCCT's psu test on infinite,DX9 1024x768 64bit and use all logical cores, if you see major swings in voltages or errors there then your Concern/RMA may be justified.

revin · Apr 30, 2012

So OCCT PSU test with the Graphic did just as gaming except since it stress the entire system all 3 rails dropped.

Thing is NOW my 3.3v rail is flucuating, whereas before the OCCT test it was steady?????

FWIW XTU still is a stronger CPU stress test, at least on my board and from what Dave as mentioned XTU has a better way to load the CPU system.

So in a nut shell, CPU testing has no effect on 12v but when using GPU the unit is at least supplying a more stable output, even if at a slightly lower voltage.

OCCT PSU testing 2x

After the testing, 3.3v still bouncing????? ....................What the heck has gone wrong now???

Cotton_Cup · Apr 30, 2012

well you can keep it as it is not much different, but you can also RMA it and just pay the 15% restocking fee or so depending on where you are and which shop or something if nothings wrong is found, but imo this is an interesting subject always wanted to open up a psu.

slyfox2151 · Apr 30, 2012

nothing is wrong here move along. as has been stated the volts are WELL WITHIN limits.

there is also a lot of factors that have been changed when you swap PSU. to name some,

Different efficiency, different power draw from the wall, different cables with different resistance. all these things will affect volts, not to mention the PSU itself.

revin · Apr 30, 2012

I didnt see in any of the reviews having this kind of shit, or for that matter really none of the Silver & Gold PSU's doing this crap so YEA it makes me want to find out why my money was spent to get something to just "move along"

So every one in this thread has a PSU that drops under 12v,when Gaming with a 5870 or eqv. and wont even output 5v ?

LTUGamer · Apr 30, 2012

Look here http://www.techpowerup.com/reviews/OCZ/FTY1000W/5.html

Voltages can be lower than should to be.

MT Alex · Apr 30, 2012

Get an oscilloscope before you get your jimmies rustled.

http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story2&reid=192

Sinzia · Apr 30, 2012

Everything seems to be in check... Get a multimeter on those v-check points if you have them, anything else is rather worthless.

Thats a known-good model of power supply, if you're really worried, rma/exchange it.

Frick · Apr 30, 2012

Ok, you're reading with software which is almost pointless. This is what my old system looked like in software:

You CANNOT use software to do this kind of testing.

Arctucas · Apr 30, 2012

I had a similar concern with my PSU and ADIA64, which I believe is the best software monitoring application.

During normal operation (idle at desktop), AIDA64 reported 12.068V on the 12V rail.

Under load, AIDA64 reported 11.888V.

However, I used my voltmeter to measure the 12V at idle and load and found that both were 12.06V.

If you are concerned your PSU is defective, RMA it.

revin · Apr 30, 2012

XTU is a FAR superior program for Intel M/B's

As in my #6 post I wasnt clear if the design of these newer PSU make them "seem" that they are putting out less power :confused:

In The reviews, even jhonnyguru's they all have higher 12v&5v readings at full and low power, which made me nervious when mine was off.

Any higher psu as the 1Kw dont behave the same so thats not a comparision.

My multimeter was destroyed in the passenger door :mad:

so I gotta get another after we get the truck back and i'm up to getting out more. Just again eairlier this mo. we got rear ended in my wifes car on the way to my Dr. just not having too good of luck. [Makes me wonder If I finish the Firebird if I should even drive it lol]

Jstn7477 · Apr 30, 2012

It's not really the software, it's the chip measuring the voltages that can be the problem. Considering the expensive Vernier scientific computer interfaces that I used in my college physics class has up to +/- 3% error range, how is the $1-2 chip on your motherboard supposed to give precision results? I bet it's not even calibrated to measure precise voltages. Plus, anything on your motherboard is subject to vdroop because of limited power inputs, trace lengths and resistances, load on the limited inputs, and probably even varying trace resistance due to board heat.

You're overthinking this too much. Measure the voltage out of your wall and gripe at the power company for giving you 118.2v instead of 120.0v. We've all told you this is not a problem. Any man made object is different and falls within a certain % tolerance that determines whether the product is correctly manufactured or defective.

ChristTheGreat · Apr 30, 2012

revin said:
XTU is a FAR superior program for Intel M/B's

As in my #6 post I wasnt clear if the design of these newer PSU make them "seem" that they are putting out less power

In The reviews, even jhonnyguru's they all have higher 12v&5v readings at full and low power, which made me nervious when mine was off.

Any higher psu as the 1Kw dont behave the same so thats not a comparision.

My multimeter was destroyed in the passenger door so I gotta get another after we get the truck back and i'm up to getting out more. Just again eairlier this mo. we got rear ended in my wifes car on the way to my Dr. just not having too good of luck. [Makes me wonder If I finish the Firebird if I should even drive it lol]

well, look at this instead:

http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story2&reid=169

or

http://www.jonnyguru.com/modules.php?name=NDReviews&file=print&reid=185

or this platinum Seasonic: http://www.jonnyguru.com/modules.php?name=NDReviews&file=print&reid=264

ATX SPEC are +/- 5%, like others said. You can have a less than 3.3v, 5v or 12v, like you can get more... By the way, software reading can be Wrong. I've tested a Sirtec HighPower 560w, old of 5 years of my brother.. Software and bios says 11.4v, but when plugged into my PSU tester, the 12v1 and v2 are at 12.1 at idle....

Your PSU is fine, that's it..

Arctucas · Apr 30, 2012

revin said:
XTU is a FAR superior program for Intel M/B's

OK, I will have to take your word for it, as the last Intel board I had was a 915 and I have never used XTU.

revin said:
As in my #6 post I wasnt clear if the design of these newer PSU make them "seem" that they are putting out less power

In The reviews, even jhonnyguru's they all have higher 12v&5v readings at full and low power, which made me nervious when mine was off.

OK, the review sample may have been overvolting, or the reviewer was actually using a meter to measure voltages, rather than software?

revin said:
Any higher psu as the 1Kw dont behave the same so thats not a comparision.

What?

revin said:
My multimeter was destroyed in the passenger door so I gotta get another after we get the truck back and i'm up to getting out more. Just again eairlier this mo. we got rear ended in my wifes car on the way to my Dr. just not having too good of luck. [Makes me wonder If I finish the Firebird if I should even drive it lol]

Sorry to hear about your misfortune, I hope everything it alright?

Anyway, once you get a new meter, post back with the results.

crmaris · Apr 30, 2012

always check your PSU with a multimeter and do not trust any software solution since all read from the same crappy IC of the mainboard. Even the cheapest multimeter will be way more accurate.

Also here is mine (really old) review of the X-750 to get an idea.

http://www.thelab.gr/power-supplies-reviews/seasonic-x-750-go-for-gold-efficiency-78356.html

And another thing, a PSU must keep its rails close to the nominal voltages. Higher voltages are equally bad with lower ones..

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SeaSonic X750 Low 5v, 12v Drops Gaming

revin

Arrakis9

Batou1986

theonedub

habe fidem

Arctucas

revin

entropy13

revin

Jstn7477

revin

Batou1986

revin

Cotton_Cup

slyfox2151

revin

LTUGamer

MT Alex

Sinzia

Frick

Fishfaced Nincompoop

Arctucas

revin

Jstn7477

ChristTheGreat

Arctucas

crmaris

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