I have an Alienware M15x, and the only external display is a single HDMI output. I'm trying to connect two vga monitors to my laptop and was wondering what I should buy. I want to run it as an extended desktop. Would I need a single HDMI splitter with two HDMI-to-VGA converters or one HDMI-to-VGA converter with a VGA splitter? Is either possible? Suggestions?
A VGA splitter will split one VGA signal into two copies of the same signal - you can't drive two monitors off of it and have two different displays.
HDMI can be converted to an analog signal, though - I would recommend you get an HDMI to DVI-D converter (or cable), and then get a cheap DVI to VGA converter. I couldn't find anything that converts HDMI directly to VGA.
In order to get two or more monitors out of the single input, you'll need a digital monitor binder, like Matrox's Dual Head2Go or Triple Head2Go.
HDMI is pure digital, VGA is pure analog. DVI supports both because it has a different set of pins for each.
HDMI converts to DVI-D but VGA converts to DVI-A. Assuming that the DVI to VGA adapter is the kind you get with video cards. Anything else would require some hardware to do the digital to analog conversion.