Had an interesting evening yesterday. Luckily I was sat next to the printer waiting for it to heat up before starting the print. So as soon as I saw the smoke I could cut the power. Being new to the 3D printing world I wasn’t aware of the problem with these green connectors being underrated, so it came as quite a surprise when it started smoking 
Why are they still making these boards with these connectors?
Anyway I used my (not very good) soldering skills to remove the connector block and solder the wires directly to the board and all still works.
However it has put me off the RAMPS 1.4 board completely. I don’t want to be watching it every 10 minutes, but don’t really want my house to burn down. So I’m looking for a replacement. I’m considering this premium RAMPS 1.4 http://ooznest.co.uk/3D-Printer-Electronic-Parts/Boards/RAMPS-14-Controller-Board-Premium for a quick fix.
But would like to upgrade to the 32bit ecosystem, any suggestions on a decent board?
I’ve had a look at the Smoothieboard and compatible boards like the Sunbeam and Azteeg (the Sunbeam looks quite good), but also the RADDS. Not really sure what to pick but don’t really want to wait weeks for something to be delivered to the UK.
Dont run your bed via the controller. Check this http://www.reprap.me/power-expander.html
Seems that the “Premium” board is StaticBoards’ version of the RAMPS (see link for extended specs). It’s the one I have and I’m quite happy with it. Anyway, even if the original Molex blocks are rated for 15A, I wouldn’t feed’em that much. Guess you’re using 12V?
As a side note, the board I got had the fuses slanted, which gave it a lower height than my older RAMPS. That was nice, since I could add more insulation layers to the bed of my Delta (and rest those on the extrusions, instead of “floating” over the fuses, which is a bad arrangement IMHO).
https://www.staticboards.es/productos/ramps14sb/
Since i switched to the duetwifi I’m really struggling with the idea of using ramps on my other machines.
So I’d really recommend it.
I keep seeing that connector toasted on other people’s printers. I hard-wired mine for peace of mind.
@Shachar_Gafni I will certainly look at doing this, thanks.
@Xavier_Faraudo Yes, it appears it is. I ordered the board and it has arrived today. On quick inspection it looks like a quality board. Especially compared to my current one. I’ll be wiring it up tonight.
@rubin_kingma duetwifi is definitely one I am considering, what’s the web interface like? From what I gather it only works with the PanelDue for the display, is that correct? but they are out of stock 
@Richard_McKenna +1 for Duet Wifi. The PanelDue is pretty awesome, but I barely ever touch mine, because the Duet Wifi web interface is just so good. You can easily get started without it, and then add the PanelDue later.
By the way, even if the current draw is kept below the nominal connector rating (which isn’t always the case) it is 99.99% universally true in 3d printer designs that the proper de-rating factors have not been applied. For example, a 15A connector is only good for 15A through ONE pin at a time. But you’ve got power flowing to and from the PSU, and each pin is heating the others, so you have to de-rate the connector to a significantly lower max current.
Another big issue is connectors on heatbeds. They have to be de-rated for the ambient temp at the connector, which in some cases even de-rates them to zero amps!
@Richard_McKenna the webinterface is awesome also the parameters of the machine are changeable without reloading firmware
I use panel mainly to see printprogress
