Edit: Stupid mouse. I had attempted to drag the text box larger to give me room to type, and it let go of it and clicked on the submit button... >> Need to get a new one.
Originally Posted by HPE1000
If its on the list does it mean it is regulated?
Also, is this worrying for someone who is considering getting a dual gpu card?"On the surface, the AU-700 seems like it should deliver plenty of power all the way around. It has some relatively high output minor rails and a total of four 12V rails. The 3.3V and 5V rails are both capable of 28A each with a combined output of 100W. Many would think that four 18A 12V rails would be enough, but few have probably done the math in their heads. This is only 216W of power on each rail.
Considering that a GTX 570 requires 219W and a GTX 580 requires 244W of power, a single rail of power will more than likely not be enough to power a single high-end GPU. This is just something to keep in mind when matching the AU-700 to your system's components. "
The FSP Aurum Gold is indeed a group-regulated design. It's is interesting to know that the FSP Aurum Gold is officially "compatible" with the Haswell power state. Unless I'm misunderstanding the testing methodology of determining whether Haswell is compatible or not, it seem to test it in with very little load on +12v rail and the 3.3/5v rail to it max (which doesn't exactly happen in the real world). Generally, when this happens on a group-regulated design, the voltage of the +12v increase greatly, cause it to go out of specs, and may trip the OVP (Over Voltage Protection) not the OCP (Over Current Protection). Or the UVP (Under Voltage Protection) as the 3.3/5v voltage also plummets as the load increase.
This whole "compatibility" issue has to deal with this, and I had expected that the Aurum to have failed this test. Even so, even if it had not been compatible (this goes for any units that didn't officially pass), it doesn't necessary mean it will cause your problems. Like I implied, the load on the 3.3/5v will likely not going to be high enough to cause the +12v get out of specs and trip to OCP; not to mentioned the fact that load of the GPU, HDD, fans, etc. will also put load on the +12v rail to "balance" the load out. If by some chance that it does cause problems, it's not a huge issue as you are able to disable this state in the BIOS.
In short, it's a non-issue. Although it offer poorer voltage regulation to other indy regulated / DC-DC PSUs.
As for the four rails being rated only 18A or 216w each. Well, the recent conversation we had on this thread regarding this is that the OCP trip point is actually set higher than the 18A as stated by Tator Tots (at 35A-40A). Also, you need to take into consideration of the cable distribution of the rails. You have four +12v rails and three PCIe connectors. I'm not sure of the exact cable distribution, but if I were to assume that one of the 12v rail is for the CPU, and each of the other three rail is for each of the PCIe connectors, it will not cause a problem. This is because power draw will be split across two rail for a single card GPU.
I would recommend this unit for your system, if it needs to be 140mm
http://www.newegg.com/Product/Product.aspx?Item=N82E16817256087Edited by qwan456 - 6/16/13 at 9:26am