Can anybody explain this?

[MCS]

Hi there

I have recently changed my motherboard from an Abit KT7A-R to an IWill KK266-R, using the same PSU (300W Sparkle). On my KT7A, the 5V line was always good, sitting at 5.03V and dipping to 4.83V under load, but my 12V was always poor sitting at 11.73V and sometimes less. However, when I installed the IWill my 12V is up at around 12.20V and never dips as far as 12.00V even, but my 5V is 4.63V or less under load!

This creates a mixed bag as far as overclocking results go, because the KK266 is much more stable and allows overclocking higher than the Abit, but because the 5V line is so low it makes it LESS stable than the KT7A.

Should I just go get an Enermax 431W? Why would the same PSU give better 5V readings on the Abit?

 

[SCSIRAID]

What are you measuring these voltages with? The MB management utility? Remember that the measurement hardware is on the MB and when you changed MB's you are now measuring with a different 'meter' and thus you really cant draw any conclusion. 5v being up at 5.6 is kinda high.

 

[MCS]

Using MBM 5. The 5.63V should have been 4.63V, sorry.

 

[anime]

it's depending on the mobo. How good the mobo regulate the current. In my case--my old intel mobo--soyo 6ba-IV the 12v line was always at 11.73-11.68.
On my new epox EP-8K7a my 12v is at 12.25 using the same PS.
So my guess it's depend on how good the mobo build quality on the current ratings from your PS to your mobo.

 

[MCS]

Just a shame the 5V line is lower on the IWill than on the Abit because if it weren't for that then the IWill would be a stabler board for sure.

Will I see the same results with a 400W+ PSU (eg 5V still under 5V?)