+12 shows as 11.14-11.20

[beast252525]

Hey, my psu is showing as having a +12 as 11.14-11.20 even in load. Recently, I dont know why it is happening all the sudden, but it is starting to smell like burning rubber, coming from the psu itself, when i play farcry, then the system shuts down. But when I play half life 2 this doesnt happen. I was thinking farcry is more demanding on the system requiring more wattage. Its kinda wierd because the psu didnt show these things before. Is it going bad? What do you all think?

2gb corsair ddr2 800
5200+ Windsor AM2
m2n32 sli deluxe wireless
8800gtx (single)
650W PSU

 

[darkstar782]

Check the voltage with a multimeter.

Other ways of measuring can be pretty inaccurate, especially windows applications.

Bear in mind that the +12v rail has a tolerence of ±5% in the ATX specs, or 11.4v-12.6v

 

[beast252525]

the power supply s&^t the bed the same night that i posted this. LOL Shut itself down and wont do anything now. Oh well I just ordered a new one

 

[blueeyesm]

2 possibilities:

1) a device installed requires more current on the 12V line could provide

2) The circuitry for the 12V rail was failing.

Hopefully you haven't purchased a power supply yet. Do quick tally of what each device needs for operating on 12V and 5V line in Watts. If it doesn't list the consumption in Watts, multiply Voltage by Current (in Amps, or A) per each device on each rail.

Add it all up, then look for a power supply that provide that rating plus approx. 25%, depending on whether or not you plan to use the PSU on a newer, more powerful system when you upgrade, or if you plan to drop in lots of power hungry devices, such as HDDs.

 

[beast252525]

well, it had a single 12v rail rated at 20a, I have an 8800gtx soo... i think that might have done it

 

[darkstar782]

well, it had a single 12v rail rated at 20a, I have an 8800gtx soo... i think that might have done it

Heh.... 240W total 12v power, 200W or so for an 8800GTX, 90W for your CPU, thats overrated before we START looking at RAM and HDDs and motherboard.

It was probably an older PSU with a strong +5v Rail, and insufficient +12v for a modern PC.

 

[AdamBomb42]

It sure sounds like it's going bad.

 

[jamesgoddard]

It's clear now you were overloading the 12V rail. I would expect all the other componants to still be OK, just need a good new PSU.

 

[beast252525]

Ok, so today I took out the old (fried) psu and replaced it with my new Rosewill RT550-135-BK. This power supply is sick and handles my system like a dream. (so far) The 31 combined amps are definately what I needed. btw, the 12+ is being read at a solid 11.97-12.03.

 

[apt403]

Rosewill? Awesome choice... :roll:

You traded one nightmare for another.

 

[beast252525]

lol, well maybe some people have had trouble with theirs in the past, but that doesnt mean that I will, they would be out of business if their psu's were that s*^tty. This thing looks nice, and so far is rock solid. I would def recommend it.

 

[shizza]

I don't mean to topic-hijack but I didn't know if this forum would prefer if I made my own topic (very related subject) or not.

Anyway, when I run speedfan 4.32 it says my +12V is 2.50V. This is while running orthos small FFTs.

My system:

cpu: E4300
mb: Gigabyte DS3
ram: corsair DDR2 800
psu: corsair 620hx
gpu: gigabyte 7600gt

Speedfan's ratings right now running orthos on stress CPU:

vcore1: 1.28V
vcore2: 2.10V
+3.3V: 3.36V
+5V: 4.78V
+12V: 2.50V
-12V: -16.97V
-5V: -8.58V
+5V: 5.13V
Vbat: 4.08V

Since my system seems to be running ok after a few hours of orthos (I haven't ever really used it for daily usage yet, still building), I figured speedfan is either incorrectly reporting the voltages, or my powersupply is rerouting power based on need.

In the BIOS my motherboard reports all the voltages as 'OK' (it doesn't give a number).

Is this ok?

If you'd like me to make a new topic, I'll delete this post.

 

[shizza]

I tried reinstalling speedfan but it reports the same result.

+12V (idle) : 0.45 - 0.5 V
-12V (idle) : -16.97V

+12V (load) : 2.50V
-12V (load) : -16.97V

Maybe I should just trust the BIOS (and its 'OK'), since speedfan seems to be quirky anyway.

It says 64Bit:NO, and reports Fan1 as 675000 RPM. Just about the only accurate thing it reports is the core0/1 temperatures, which match CoreTemp and are -15C off from TAT (I think TAT reports E4300's off by +15C?).