Sign in with
Sign up | Sign in
Your question

PSU 12v ripple OCCT - Is this good?

Last response: in Components
Share
July 29, 2010 1:05:39 AM

http://img267.imageshack.us/f/2010072819h39volt12.png/

Hi, can you tell me if this is adverage, good, or bad? Or if I need to run it longer then can you tell me what is adverage, good, and bad? The single 12v line is going to a 470 gpu, 1250w PSU.

Thank you
July 29, 2010 1:58:06 AM

Blckhaze said:
http://img267.imageshack.us/f/2010072819h39volt12.png/

Hi, can you tell me if this is adverage, good, or bad? Or if I need to run it longer then can you tell me what is adverage, good, and bad? The single 12v line is going to a 470 gpu, 1250w PSU.

Thank you


It looks average to me... but run it longer please then post again!
m
0
l
a c 243 ) Power supply
July 29, 2010 10:28:51 AM

It's not really "ripple", that's a term used to describe electrical noise on the AC side of the power supply.
It's voltage fluctuation, and well within the ATX specification of +/-5 %, if you trust software voltage readings.
m
0
l
Related resources
a b ) Power supply
July 29, 2010 2:31:36 PM

+1^

As Delluser1 said, Noise (ripple) is what you see as variations on the voltage Line. Need an O'scope to measure, computer with software can not do this. Time interval to measure generally in millisecond to nanoseconds. Sample rates of software is way to slow

Primarily 4 catigories:
Line noise - generally very low and is at line frequency (60 Hz for US).
Switcher frequency - this is 20 -> 40 Khz, also fundamentals of this (ie 2x, 4 times frquency.
Load variations - caused by rapid flucuations of the load. ie when you switch from 2 D to 3D graphics.
Misc frequence High Freq caused by poor shielding and or poor filtering. An example of this would be seeing your Clock freq as ripple on on +12 V rail.
m
0
l
July 29, 2010 2:52:39 PM

Ripple is the correct term. All the DC voltages will have a spec for it. It will change depending on the load. It is rarely used for the AC voltage since it is usually not a concern in most cases.

It's hard to tell from the graph if this is good or bad. Like RetiredCheif said you need to scope it to really see if there is a problem. Do you suspect a problem?
m
0
l
July 29, 2010 9:46:07 PM

Thanks for all the replies!

No I don't see a problem at all, but its good to know a $350 PSU is working good so I wanted to kind of inspect it even though no problems so far.

Thanks
m
0
l
!