low voltages on 3.3, 5. and 12v rail

[TenPc]

What is implied if the 3.3v is in the only about 1v +, the 5v rail is about 3v + and the 12v rail is indicating only 7v+?

If you want the benchmarks and extra details go to page 2 in the following link -
http://www.tomshardware.co.uk/answers/id-1658777/vray-slow-amd-8350.html

Add your own reply if it helps the Question but I'd like to know what would cause such a drop.

 

[ericlw]

a new power supply.

 

[ThomasJ93]

How did you measure these voltages? Did you use a multimeter or some kind of software? Software isn't a very reliable way of reading out the voltages.

If you're experiencing an unstable system, you should get a new powersupply.

 

[bigpinkdragon286]

After following your link, I would say, the OP needs to cool his system better.

Also, I agree with ThomasJ93, that you can't rely on software only readings.

 

[everlost]

an exessive load could cause a voltage drop like that. like a 500watt PSU driving a 600watt load. a shorted power rail would drop the Volts on other rails.

but, the voltaged are low enought i doupt your computer could boot, the 12v rail too low to spinup a HDD. then your VBATT doesnt have the juice to keep the bios settings saved.

since VBATT is not part of your powersupply, and your not getting a message on boot, and your booting, i would lean towards the voltages being reported incorrectly. although i would conferm these numbers with a voltmeter on atleast the 12v (yellow wires) and 5v (red wires) to the ground/common (black wires).

 

[TenPc]

Thanks to all replies so far, it's not my Pc it's the OP in the Question link. I though it was just unusual to see the drop on those 3 particular cores for all the colums - min, idle, max.

The OP had maxed is CPU to 4000mhz (usually 2700mhz) would that affect those voltages?

Just need feedback

 

[smeezekitty]

Looks like a software measuring error. When in doubt measure it with a voltmeter.

 

[bigpinkdragon286]

TenPc, the OPs 8350 is supposed to run at 4 GHz normally.

 

[TenPc]

TenPc, the OPs 8350 is supposed to run at 4 GHz normally.

Hey, thanks for the update.

The voltages, even though it might be software malfunction, but maybe not?

 

[smeezekitty]

Well HWMonitor measure my 12v rail at 12.7v yet asrock OC tuner shows a much more reasonable 12.04 which is within 100mv of my multimeter.

 

[TenPc]

A screenshot with Hardware Monitor -

Refererring to - http://www.tomshardware.co.uk/answers/id-1658777/vray-slow-amd-8350/page-2.html

 

[everlost]

nothing should affect the voltages untill your are past the capacity of the PSU/Power Rail, then you will see voltages drop. however, PSU behave funny when the load is too low also, usually voltage hunting/fluctuating.

i still find it hard to believe that this computer can boot with these voltages, leading me to assume the software is wrong.

 

[TenPc]

Fluctuations, I had another OP that used a generator for his mains power and wondered why his rig kept shutting, I told him about the continuous power as against the fluctuating power but got no reply, perhaps his Pc shut down permanently lol.

I'm not an expert in much of anything but thought the voltages were abnormally low, they are supposed to be around their respective numbers, not so many x amounts of volts lower. This OP does boot up and does use his Pc for rendering so it surprises me, too, that he could even get past desktop.

Perhaps it is the fault of the HWMonitor after all.

Thanks for replying.

 

[bigpinkdragon286]

It's likely something with how the voltages are being reported by the system monitoring chip. It's not like this information is even required to be presented to users. I've seen plenty of bad readouts from software when the actual voltages were just fine. Take it with a grain of salt or two.

I doubt HWMonitor has anything to do with getting the numbers wrong. What would be the cause of that, except wrong numbers being fed to it?

Most stable computer I ever owned actually had a readout that was all wonky like that. Ran for years. If the software works, great, if not, nobody is really out anything. 🙂

P.S. To reiterate, that screen shot clearly shows his processor is getting too hot, and if that's an idle temp for the graphics card, you've got problems.