[Pc_Support] No CD-ROM power, no POST?

Jason Boxman jasonb at edseek.com
Fri Jul 29 19:19:04 EDT 2005


Bryan J. Smith said:
> Jason Boxman <jasonb at edseek.com> wrote:
>> So, I go to install my new 6600GT.  No go.
>> It boots up with corrupt graphics at the BIOS screen.
>
> Does it have a 4-pin Molex connector on the card end opposite
> of the bracket?  If so, plug in a Molex connector.

Yes.  Initially I forgot to plug it in, but I doubt it damaged the card. 
The manual also made no mention of it, although upon seeing the connector
visually I intended to plugin the molex before booting.  That's what happens
when you take on the phone at the same time.

> The AGP slot is only capable of delivering 25-50W.
> The AGP Pro (rare) is able to deliver 50-100W.
>
> Both the card _and_ mainboard must be AGP Pro.
> Since this is rare (typically only Quadros), you need the
> Molex.
>
<snip>
>> That's the number one reason I absolutely had screwing
>> around with my boxes.  Something always goofs up.  Always.
>> And it seems it always costs me money.  Sigh.
>> I'll have to try the 6600GT in my other AGP box and see if
>> it works okay or not.
>> Meanwhile, time to put my expansion cards back in, again.
>
> Don't forget the Molex connector.
>
> *ALSO*, what is your mainboard?
> It could be a voltage issue.
>
> AGP 2.0 (4x) is 1.5/3.3V
> AGP 3.0 (8x) is 0.8/1.5V

It's the ECS K7S5A.  It's AGP 4x.  Wouldn't surprise me if that's precisely
the problem.

> Many AGP 3.0 (8x) video cards are no longer 3.3V tolerance,
> and if your mainboard can't deliever 1.5V to the AGP, you're
> SOL.

That's probably it.

If it is, should I bother trying to pick up a cheap old NForce2 mainboard so
I can just recycle my components and run, or would that be enough of a waste
of time that I should just throw in the towel and look at the newer NForce4
solutions (and associated costs)?

Thanks.






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