Server MBs

[Roger Oberholtzer]

On Fri, 2005-08-19 at 12:56 -0500, Alma J Wetzker wrote:
> Roger Oberholtzer wrote:
> > On Fri, 2005-08-19 at 15:20, Lonni J Friedman wrote:
> > 
> >>On Fri, 19 Aug 2005, Roger Oberholtzer wrote:
> >>
> >>>Dumb question here:
> >>>
> >>>I am looking at 19" rack mount chassis that can hold 6, 8 or however
> >>>many more SATA disks. These seem to be common; however, it seems that
> >>>all suppliers list that the systems are for Dual Xeon ATX MB. Well, I do
> >>>not want Dual Xeon. I want a P4 ATX MB (as in an ASUS P4C800-Deluxe).
> >>>Could I expect this to work? Could it be that the Dual Xeon info is just
> >>>letting me know I can put that in, but a P4 MB should work as well?
> >>>These are not coming with the MB. I will be adding that.
> >>>
> >>>I am asking various manufacturers this, but I want to know NOW!!
> >>>
> >>>Anyone know about this sort of thing?
> >>
> >>Generally speaking i don't think you can run Xeons and P4s in the same
> >>motherboard, as they have different numbers of pins.  The P4C800 you
> >>mentioned certainly can't take Xeons.
> > 
> > 
> > I am not trying to run them in the same motherboard. I have selected the
> > ATX motherboard and CPU that I want. What confuses me is that the rack
> > chassis info say they are for an ATX with a Dual Xeon. I can see that
> > they can say they support such a thing. But does that mean this is all
> > the rack supports? I thought ATX defined where the connectors are and
> > the types of connectors for power and things. The specific CPU should
> > not really be a concern of the rack chassis. In fact, I have found some
> > manufacturers that say their racks support ATX MB with Xeon, P4 or PIII.
> > I think in the other cases (where only Xeon is listed) the manufacturer
> > is being lazy or assumes their customers know this support (P4 and all)
> > is implied.
> > 
> 
> I usually run AMD so I am not positive, but, I think the high end Intel 
> processors need a separate power connector from the power supply.  Are 
> those connectors the same for a P4 and a Xeon?  Is it a 2U case so you 
> can replace the PS with one that does have the correct connector if you 
> guess wrong?

I think they need +12V. This is a power supply thing. There are ATX
power supplies. 

> 
> ATX does indeed mean that the mechanical connector locations are 
> defined.  It even implies a certain connector for MB power.  With the 
> specialized stuff that showed up in the decade since ATX was defined, 
> some extra stuff is bound to get added.

Yep. But, ATX does not tell which CPU is there. Only what power the CPU
might expect.


> 
>      -- Alma
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