Psu

[Lynx_78]

Hi all.
I'm a little clueless with the voltage of a pc but the readings(which I've listed below) that i get from Speedfan and some other software does seem right.Can somebody please tell me what can be wrong,the psu is still pretty new so it should not be a problem.

Vcore1 1.30v -12v -4.79v ***
Vcore2 2.14v -5v -2.9v
+3.3v 2.14v +5v 5.51v
+5v 5.03v Vbat 3.23v
+12v 5.06v ***
Operating system Windows xp sp 3

Amd Phenom quadcore 9950 2600mhz CPU
Elitegroup A790gxm-a Motherboard.
660 w acbell PSU
4 Gig ddr2 800 kingmax ram.
8800 gt 512mb Alpha dog edition Gpu (Single)
160 Gig seagate SATA HDD.
3dAurora towercase.

 

[mindless728]

software can report the voltages wrong, try looking in the bios when it starts up, also you can easily check the 5v and 12v with a voltmeter (the 4 in molex connector has both voltages)

 

[theAnimal]

I'm a little clueless with the voltage of a pc but the readings(which I've listed below) that i get from Speedfan and some other software does seem right.Can somebody please tell me what can be wrong,the psu is still pretty new so it should not be a problem.

Software readings should not be trusted, use a DMM.

 

[Lynx_78]

software can report the voltages wrong, try looking in the bios when it starts up, also you can easily check the 5v and 12v with a voltmeter (the 4 in molex connector has both voltages)

Like i said i'm a newby to all off this.I haven,t got a clue where to test for voltages,but I've used a couple of software programs that all report the same.
Can this incorrect reading have a impact on my pc performance?
Thank you

 

[4745454b]

Its been my experience that speedfan will report the same voltage as the bios, but assign them to the wrong thing. For example, your "Vbat" is most likely your 3.3V rail. Check them with a volt meter, its the best way.

 

[jsc]

You can measure all PSU voltages off the back of the main PSU connector - carefully, carefully - with a DMM.

Yellow wires should be +12 volts, red wires +5 volts, orange wires +3.3 volts, violet wire +5 volt standby (always on), and blue wire -12 volts. Tolerance is +/- 5%.

 

[Lynx_78]

Its been my experience that speedfan will report the same voltage as the bios, but assign them to the wrong thing. For example, your "Vbat" is most likely your 3.3V rail. Check them with a volt meter, its the best way.

Thank you very much i will check this out and if i may i will call on your advice again thanks

 

[Lynx_78]

Its been my experience that speedfan will report the same voltage as the bios, but assign them to the wrong thing. For example, your "Vbat" is most likely your 3.3V rail. Check them with a volt meter, its the best way.

You can measure all PSU voltages off the back of the main PSU connector - carefully, carefully - with a DMM.

Yellow wires should be +12 volts, red wires +5 volts, orange wires +3.3 volts, violet wire +5 volt standby (always on), and blue wire -12 volts. Tolerance is +/- 5%.

Thank you i will check it out and let you know

 

[Lynx_78]

Its been my experience that speedfan will report the same voltage as the bios, but assign them to the wrong thing. For example, your "Vbat" is most likely your 3.3V rail. Check them with a volt meter, its the best way.

Sorry there is something else i want to ask,my Mobo got 8 pins on the 12v connection side but currently i'm using only a 4 pin connector do you think that this may be the problem? On the PSU there is a spare 12v connector and the slot on the mobo will accept both at the same time.Can i use both?

 

[theAnimal]

Sorry there is something else i want to ask,my Mobo got 8 pins on the 12v connection side but currently i'm using only a 4 pin connector do you think that this may be the problem? On the PSU there is a spare 12v connector and the slot on the mobo will accept both at the same time.Can i use both?

Sounds like the PSU has a 4+4 connector, so yes you can use both.

 

[4745454b]

Before I say yes, what model PSU do you have? I'm not 100% sure of what your talking about.

but currently i'm using only a 4 pin connector do you think that this may be the problem?

Adding the second plug won't make speedfan report the voltages better. Is there a different problem your having?

 

[Shadow703793]

^My guess is OP has a bad PSU. I know that SpeedFan etc reports voltages wrong but remember OP has some no name PSU. That PSU is a time bomb, replace ASAP with a quality unit from Corsair, PC Power & Cooling, Antec, or OCZ.

 

[Lynx_78]

^My guess is OP has a bad PSU. I know that SpeedFan etc reports voltages wrong but remember OP has some no name PSU. That PSU is a time bomb, replace ASAP with a quality unit from Corsair, PC Power & Cooling, Antec, or OCZ.

My psu is a acbel 660w and i agree that it may be the problem my pc also keeps on crashing after a couple of minutes of playing a game like crysis.My previous gpu a 8800 gt burned out so i'm thinking maybe the psu got damaged at that time do you think that the psu can damage my system. thanks to every one for there advice.

 

[Lynx_78]

Before I say yes, what model PSU do you have? I'm not 100% sure of what your talking about.

but currently i'm using only a 4 pin connector do you think that this may be the problem?

Adding the second plug won't make speedfan report the voltages better. Is there a different problem your having?

My psu is a acbel 660w My pc keeps on crashing when i play games like crysis the graphic starting to distort and then it freezes up.the temps on the gpu goes up to about 62 Celsius is that maybe the problem?

 

[Lynx_78]

^My guess is OP has a bad PSU. I know that SpeedFan etc reports voltages wrong but remember OP has some no name PSU. That PSU is a time bomb, replace ASAP with a quality unit from Corsair, PC Power & Cooling, Antec, or OCZ.

Hi i have just tested my psu with a multimeter and all the voltages tested fine but speedfan still report the 12v at only 5.5
and the -12v at - 4.9v.Do you think i can ignore this as a bad reading then.I've connected both 12v connectors on the mobo but i didn't see any difference,i will eventually replace the psu can you suggest a good one please.Thanks all for the advise.

 

[Shadow703793]

^Did you test the PSU with a load? ie while gaming,etc. Either way, I think it's your PSU that's the problem. I also think it's your PSU that killed the 8800GT.

 

[4745454b]

If the voltages tested fine its just a software glitch. As I said, speedfan reports correct numbers but assigns them to the wrong value. I have no idea how good an "acbel 660w" is, so its entirely possible thats why games crash on you. An 8800GT doesn't draw that much power however, so thats a bit weird. I agree that you should test under load, perhaps your PSU doesn't handle that so well.

 

[Lynx_78]

^Did you test the PSU with a load? ie while gaming,etc. Either way, I think it's your PSU that's the problem. I also think it's your PSU that killed the 8800GT.

No i did not test under load but after i connected the second 12v connector my graphics seems to be running fine and i'm definitely gonna change the psu thanks again for all the help

 

[Lynx_78]

If the voltages tested fine its just a software glitch. As I said, speedfan reports correct numbers but assigns them to the wrong value. I have no idea how good an "acbel 660w" is, so its entirely possible thats why games crash on you. An 8800GT doesn't draw that much power however, so thats a bit weird. I agree that you should test under load, perhaps your PSU doesn't handle that so well.

My graphic seems to be fine now after connecting the second 12 v plug so i'm not gonna mess around with it any more i will replace the psu thanks a lot for all the help i had no clue where to start