17-09-2019, 08:33 PM
Yes, I'm wrong about the 3.3V on rechecking what I have. Lack of food?
However none of the ATX (3.3, 5, 12V) PSUs I have, have any adjustment on any rail . Nor has the 12V only DELL PSU, any laptop PSU or AIO PSU brick..
The point of the 12V only idea is to allow the Mobo to have the specific PSUs because the multi-rail PSU has to be overrated on some outputs to be general purpose to different models. Also a laptop style Mobo on an an All-in-one is basically a laptop without the Lithium battery charging circuits, so can use a lower voltage, such as 12V rather than 19V with little change to the circuitry. The true desktop PC is nearly dead as a product as sales are mostly server trays or laptops. The AIO format is a stupid purchase as it's often more expensive than a comparable laptop and basically is a laptop without the "free" UPS a laptop. The true desktop is more efficient with a PSU that has the rails required. Part of the issue is that the standard ATX doesn't have the 1.8V etc and there are onboard SMPSUs for RAM, GPU and CPUs. Certainly tray type "pizza" Servers, laptops and AIOs will be using single rail PSUs.
However, 14V is closer to ideal than 12V for CB/Ham/Marine RX/TX and many SMPSUs not designed for radio have too much RFI. I'd use adapted PC PSUs, (ATX, 12V, 19V etc) for all kinds of stuff but NOT radio gear designed for vehicles. Far better to have a designed for that use PSU or smart charger on a real vehicle battery.
However none of the ATX (3.3, 5, 12V) PSUs I have, have any adjustment on any rail . Nor has the 12V only DELL PSU, any laptop PSU or AIO PSU brick..
The point of the 12V only idea is to allow the Mobo to have the specific PSUs because the multi-rail PSU has to be overrated on some outputs to be general purpose to different models. Also a laptop style Mobo on an an All-in-one is basically a laptop without the Lithium battery charging circuits, so can use a lower voltage, such as 12V rather than 19V with little change to the circuitry. The true desktop PC is nearly dead as a product as sales are mostly server trays or laptops. The AIO format is a stupid purchase as it's often more expensive than a comparable laptop and basically is a laptop without the "free" UPS a laptop. The true desktop is more efficient with a PSU that has the rails required. Part of the issue is that the standard ATX doesn't have the 1.8V etc and there are onboard SMPSUs for RAM, GPU and CPUs. Certainly tray type "pizza" Servers, laptops and AIOs will be using single rail PSUs.
However, 14V is closer to ideal than 12V for CB/Ham/Marine RX/TX and many SMPSUs not designed for radio have too much RFI. I'd use adapted PC PSUs, (ATX, 12V, 19V etc) for all kinds of stuff but NOT radio gear designed for vehicles. Far better to have a designed for that use PSU or smart charger on a real vehicle battery.
