M2 ATX installation trouble with ignition signal?

yes sir. you're right that I'm stupid for not planning better.

but, I am at least checking everything out now and making sure it's right before it goes into the car. For example, I bought a multimeter and am thankful I did, because it made finding a switched acc. line easier.

sure enough, the computer boots fine on my regular 300 watt atx psu.

I went ahead and ordered a 160 watt m2 atx since my whole set up is based on the m2 dimensions and stuff. I think that should make a big difference from the 90 watt m2 atx that couldn't power my cpu. Even with the 160 Watt, I imagine I will have to limit what I plug into my socket A462 setup.

thanks for all the help.

Did youever read this?

http://www.mp3car.com/vbulletin/advf...iew&advfaqid=6

I did now, and that explains a lot.

the 160 watt m2 atx claims up to 8 A on the 12V rail, so that should be enough.
can't find what the 90 watt m2 atx 12V rail was, but it's too low for my setup I guess.

thanks for posting the link to the 12V rail power supply thread.

Underclock your processor by reducing the FSB from 400 to 266 mhz. Cuts cpu speed -- and therefore power comsumption -- by almost half. I do this with my Socket A / M2 setup. You can also disable all the mobo features you don't use (gameport, serial, parallel, ethernet, etc). I can't remember if that mobo allows you to undervolt things or not (I have one in a home computer).

Also, it kinda sounds like you have your +12v (constant) and IGN (switched) wires reversed. Also, a good way to tap the cigarette lighter (especially if you use it to switch on your amps too) is to put a relay on it.

I was wondering if anyone would know, or be able to point me in the right direction. I'm trying to figure out which wire coming out of the back of the radio is the ignition or 'remote on' so I can tap into. It's a 2007 Mazda 3 and it's the last wire I have to run. Thanks for any information in advance!

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I was wondering if anyone would know, or be able to point me in the right direction. I'm trying to figure out which wire coming out of the back of the radio is the ignition or 'remote on' so I can tap into. It's a 2007 Mazda 3 and it's the last wire I have to run. Thanks for any information in advance!

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Easy. Just get a multimeter, and set it to 12V DC. Get the negative side (usually black) of the multimeter and firly press it against the chasis of the car, or any metal part you are certain is connected to the chasis (or even a black ground wire if you know of one). Then get the positive side (usually red) and touch each of the wires at the back.

The one which gives you 0V when the ignition is off, and around 12V when the ignition is on accessories (or engine is started) is the wire you are after.

Thanks man, I appreciate the response!