Voltage is the same over the entire MXM range.
The m5550 is based on the exact same motherboard as the m5750. They both accept Type III cards, or in this case the 'Arima Special'
Some points...
All this talk about the disadvantages of MXM seems odd to me. A very large percentage of notebooks with discrete graphics use a modulare slot. Some MXM cards, some cards that use the MXM connector and then a wide range of custom designs. If designing around a modular concept...
Thanks for mentioning MXM-Upgrade ;) Interesting read for certain.
I just wished you would have choses an other upgrade for your reference :( That was the very first one I did. Things have gotten a bit better. There are a few other guides here that offer better insight.
I'll reread the...
I just wanted to point out that Gateway (Quanta) indeed uses a Type III MXM slot but that their cards appear to be incompatible with other MXM notebooks, including their own.
Also; if you guys want some information of cards for that article, drop me a line. I'm sure we can work something out.
Stupid ideas are sometimes the best... Are you sure your AC addapter is OK? Are you sure you replugged the battery correctly? Have you tried to reseat it? Have you juggled around a bit with the connector?