Hi
I got 1 450Mhz P3 slot 1 PC. the motherboard can only support 36GB. If i
add PCI IDE Card to the PC, will it support hard disk bigger that 36GB?
Yes
Most cards should work, but the only way to be 100% sure is
to buy one and try it.
Another thing, is it posible to downclock the processor? Since the server
will only serve me, i think it doesn't require that speed.
It depends on the details of implementation whether you need
450MHz P3 or not. Suppose you had a PCI soft-processing
RAID card and a raid array of drives, plus a Gigabit PCI
network card. I say suppose this, because it is the most
cost effective way to get disc fault tolerance and fast
access (100Mb lan will be the bottleneck if you don't use
GbE, and while 100Mb throughput won't be bottlenecked by the
450MHz P3, GbE plus the Raid card will be slightly).
Downclocking will definitely reduce heat, but far better is
downclocking in conjunction with lowering the voltage.
You've not given us enough information to know what is
possible with your board, you should investigate things like
motherboard bios or jumper settings for FSB and CPU vcore
(voltage). I don't even remember what voltage a P3-450 uses
at the moment but it's a fair bet that if underclocked to a
66MHz FSB, for resultant 300MHz total speed, it will still
be stable at a lower voltage... but this is definitely
something (stability) you would have to test extensively
before relying on it.
The more universal way to force an underclock on slot 1 CPU
involves cutting traces on the board or masking pins so they
don't make contact in the socket. Different people have
different ways of doing it, some just put a piece of tape
over the contact (leave it on permanently) but I prefer to
first mask off on both sides of the contact with tape, then
paint the area with nail polish, then peel off the tape. It
is a bit easier to understand after having done it, if you
aren't clear on what I mean. Any board can be forced to
underclock a CPU in this manner, with rare exception of
those that have the FSB jumper (which should start out set
to "auto" but if someone had previously changed it to a
manually set speed) set.
Similar methods of covering or joining contacts can change
the voltage as well, but you may not even need to do these
things, as a P3-450 is not a very hot CPU by modern
standards, they can be passively cooled if using a passive
type heatsink (very long fins) with a plastic duct that
extends from overtop the 'sink to an adjacent case or PSU
fan.