Re: Tyan S2665 does not power up with Enermax EG851AX-VH PSU

yes both CPUs have the same Spec number - SL6NR
http://processorfinder.intel.com/scr...sp?sSpec=sl6nr

also I've tried 4 configs:

1) DELTA PSU + 1 CPU + 4 DIMMs + VIDEO (no other devices connected)
the system starts right away after power cord is plugged in.
I tried all 3 Pentium Xeon CPUs I have got - all of them work.


2) DELTA PSU + 2 CPUs + 4 DIMMs + VIDEO (no other devices connected)
the system doesn't POST, CPU fans are spinning at full speed
Pressing reset/power buttons doesn't have any effect


3) ENERMAX PSU + 1 CPU + 4 DIMMs + VIDEO (no other devices connected)
the system doesn't POST, CPU fans spin just for a second after flipping
the switch on the PSU. Pressing reset/power buttons doesn't have any effect


4) ENERMAX PSU + 2 CPUs + 4 DIMMs + VIDEO (no other devices connected)
the system doesn't POST, CPU fans spin just for a second after flipping
the switch on the PSU. Pressing reset/power buttons doesn't have any effect





"Doug Schmidt" wrote ...
> Silly question but, do your two 2.66 CPU'shave the same spec number?
>
> Doug
>

Enermax EG851AX-VH is EPS12V compatible right out of the box - no adapters
needed.

I didn't have to use any adapters for the SBT2 board either. So far I've got
RMA# from Tyan

but I'd hate to send perfectly working board back to them. I still believe
that I'm missing something.

"Doug Schmidt" wrote ...

> The Enermax power supply should have a couple of adapters (24 to 20 pin
and
> a 24 to 24 pin). I assume you used one of them to connect the supply to
your
> P III board. Did you use the other (ATX GES connector) on your S2665 or
did
> you connect the supply directly without an adapter.
>
> The ATX-GES connector has a different voltage output sequence and if used
> could have damaged the s2665.
>
> Is this a possibility?
>
> Douggs

Alex, you seem to know what you're doing and I can't think of anything else
other than all the simple things which I'm sure you've tried. I agree that
it sounds like a motherboard problem. Perhaps, a component was close to
failure and the surge of power from restarting the machine pushed it over
the edge. Don't know. I had a Tyan S1696 that died after I simply set the
BIOS to the defaults and rebooted the machine. Best of luck!

By the way, after a 5 week wait my S2665 is arriving this Monday. How do you
like the board other than your recent problems?

Doug


"Alex Goover" <> wrote in message
news:Sr1Ua.25389$ .com...
> Enermax EG851AX-VH is EPS12V compatible right out of the box - no adapters
> needed.
>
> I didn't have to use any adapters for the SBT2 board either. So far I've
got
> RMA# from Tyan
>
> but I'd hate to send perfectly working board back to them. I still believe
> that I'm missing something.
>
> "Doug Schmidt" wrote ...
>
> > The Enermax power supply should have a couple of adapters (24 to 20 pin
> and
> > a 24 to 24 pin). I assume you used one of them to connect the supply to
> your
> > P III board. Did you use the other (ATX GES connector) on your S2665 or
> did
> > you connect the supply directly without an adapter.
> >
> > The ATX-GES connector has a different voltage output sequence and if
used
> > could have damaged the s2665.
> >
> > Is this a possibility?
> >
> > Douggs
>
>

before I run into this little problem I was absolutely satisfied with the
performance
and reliability of the board.

"Doug Schmidt" wrote ...
> Alex, you seem to know what you're doing and I can't think of anything
else
> other than all the simple things which I'm sure you've tried. I agree that
> it sounds like a motherboard problem. Perhaps, a component was close to
> failure and the surge of power from restarting the machine pushed it over
> the edge. Don't know. I had a Tyan S1696 that died after I simply set the
> BIOS to the defaults and rebooted the machine. Best of luck!
>
> By the way, after a 5 week wait my S2665 is arriving this Monday. How do
you
> like the board other than your recent problems?
>
> Doug