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TheNoid

+12v Rail showing 11.808v

That's fine. The specification (from what I can find) is 12v + or - 5%, which is anywhere from 11.4 to 12.6V.

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Posted · Original PosterOP

Under load, sometimes, it goes down to 11.808 avg ~11.900 range.  Is this safe?  I found a few posts elsewhere but no one is definitive as usual.

EVGA 1000 GQ

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1080 FTW 2

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Not sure what other info is relevant.

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Its okay. this levels of fluctuation are pretty normal under load and will only matter under the heaviest OCs


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Posted · Best Answer

That's fine. The specification (from what I can find) is 12v + or - 5%, which is anywhere from 11.4 to 12.6V.


Tag me @Opencircuit74 or quote me if you want me to respond, message me if you want me to spec out a decent low-budget build. (US Only) CPU: I7-6700k RAM: 16GB (8X2) DDR4-3200 GPU: EVGA GTX 1080 SC, ZOTAC GTX 1660 MOBO: ASUS Z170-A PSU: Corsair RM850 SSD: ADATA XPG SX8200 PRO 1TB HDD: Seagate  Barracuda 2TB Case: NZXT S340 White Cooler: Cooler Master Lite 240 AIO

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My platinum rated PSU’s 12v rail doesn’t deliver exactly 12vs. I called Corsair and they said that was normal and within spec. Apparently as long as it is close enough the tolerance of the CPU will cover the rest.

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Just now, Opencircuit74 said:

That's fine. The specification (from what I can find) is 12v + or - 5%, which is anywhere from 11.4 to 12.6V.

Correct. BUT those ranges with todays hardware are not that nice. But since OP is lots away from this he is absolutely fine 


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Just now, Metallus97 said:

Correct. BUT those ranges with todays hardware are not that nice. But since OP is lots away from this he is absolutely fine 

You're right, once the voltages approach those limits you can see some instability, but as you said OP is fine.


Tag me @Opencircuit74 or quote me if you want me to respond, message me if you want me to spec out a decent low-budget build. (US Only) CPU: I7-6700k RAM: 16GB (8X2) DDR4-3200 GPU: EVGA GTX 1080 SC, ZOTAC GTX 1660 MOBO: ASUS Z170-A PSU: Corsair RM850 SSD: ADATA XPG SX8200 PRO 1TB HDD: Seagate  Barracuda 2TB Case: NZXT S340 White Cooler: Cooler Master Lite 240 AIO

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Did you actually measure it with a multimeter, or did you just look at the completely imprecise and useless numbers in Windows?


 

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I think the hoomans put their builds here?

Why do you hoomans give your builds a name? Here's my build, which I shall call "Do as I Say, Not As I Do" (seriously, don't get this build)

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Ryzen 1500X @3,925 GHz

Cooler Master Hyper 212 Evo + 2x ML120

MSI B350 Tomahawk Arctic

2x8GB Corsair Vengeance LPX 3000 MHz CL15 (Micron B-die) @2933 MHz

Sapphire Radeon R9 280 Dual-X @1120 MHz / 1450 MHz

120GB 850 Evo

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And my laptop, which I shall call "If It's Stupid But It Works" (It can actually play CS:GO at 50 FPS, and Civ V at 25 FPS)

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Posted · Original PosterOP
Just now, seon123 said:

Did you actually measure it with a multimeter, or did you just look at the completely imprecise and useless numbers in Windows?

Guess.

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1 hour ago, TheNoid said:

Hwinfo.

Oh.... That's dumb.

 

HWInfo gets the readings from the motherboard.  Not the PSU (unless the PSU actually supports reporting, which yours and 95% of the consumer grade PSU's on the market don't).

 

So what you're seeing is 11.808V at the reporting IC on the motherboard.  And if you know anything about Ohm's law, you know there's no way that can be an accurate representation of what the PSU is actually putting out.

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1 hour ago, TheNoid said:

Hwinfo.

Useless random numbers then - they don't tell you what's the actual voltage levels. It shows 11.808v, but it might as well actually be 11.401v, 12.578 or even 12.000v on the nose. 

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24 minutes ago, jonnyGURU said:

Oh.... That's dumb.

 

HWInfo gets the readings from the motherboard.  Not the PSU (unless the PSU actually supports reporting, which yours and 95% of the consumer grade PSU's on the market don't).

 

So what you're seeing is 11.808V at the reporting IC on the motherboard.  And if you know anything about Ohm's law, you know there's no way that can be an accurate representation of what the PSU is actually putting out.

That for sure is correct, but how accurate are the readouts from the PSU itself? I use a corsair HX1000i. DO you have any numbers on how accurate it is?


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36 minutes ago, Metallus97 said:

That for sure is correct, but how accurate are the readouts from the PSU itself? I use a corsair HX1000i. DO you have any numbers on how accurate it is?

Depends on the load.  The op-amps used are pretty cheap, so the accuracy is really bad at low loads.  DC measurements are pretty accurate, but AC measurements are so off at low loads that LINK/iCUE has to use a look up table to cross reference the DC readings to calculate what to display in the software.

 

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