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The
Motherboard Guide
The motherboard is the
foundation of any PC. All the critical subsystems, including the
CPU, system chipset, memory, system I/O, expansion bus, and other
critical components run directly off the motherboard. Likewise, the
interconnections among these components are laid into the
motherboard itself.
The mainboard is
possibly the most important part of the computer. It manages all
transactions of data between CPU and the peripherals. It houses the
CPU and its second level cache, the chipset, the BIOS, main memory,
I/O chips, ports for keyboard, serial I/O, parallel I/O ,disks and
plug-in cards.
The first decision
you have to make before buying a motherboard is nowadays which CPU
and then which chipset you're gonna use and which motherboard to
choose. There's no doubt about it - you really should go for a
brand motherboard, preferably a brand that's present on the web,
because that is by far the best way to get the latest Flash BIOS
update, drivers and information about the board you might
require.
Add-Ons
It is becoming
pretty common to use a few more cards in your system than only a
graphics card. A gaming system without a modem, ISDN or network card
is certainly not worth being called a gaming system anymore, simply
due to the fact that the only real gaming experience is generated by
multiplayer games, my beloved Quake II is only one of many many
others. Hence it's not out of the world if I expect that any network
card should work flawlessly in any motherboard.
People who buy
expensive Pentium III systems are certainly making a smart move when
investing in SCSI rather than EIDE. SCSI still offers the highest
disk performance, a great upgradeability for e.g. CDROMs,
CD-recorders, scanners, streamers, ... and last but not least a very
low trouble level. Thus I do appreciate if motherboards that are
targeted towards expensive high end systems have got a SCSI adapter
already onboard, a RAIDport is even better, and it's almost perfect
if it's even Adaptec's latest U2W SCSI adapter, as e.g. on DFI's new
BX board. The least I would expect however, is that any SCSI
adapter runs flawlessly in any board.
A sound system is
nowadays a basic component of any PC. Thus I'd appreciate if there's
either a decent sound system onboard or the board works fine with
older ISA soundcards as well as the new PCI soundcards. In case of
the latter it's useful having the new 'SBLink' onboard, which
enables compatibility to the old ISA Soundblaster standard.
All in all do I
think it's not really asked too much that a modern motherboard can
host all these components together at the same time. If it doesn't,
it may be as fast as it wants, it will still be pretty useless for
any home or office user, system integrator or OEM.
Stability
Another requirement
of a motherboard is certainly the stability. In the most cases
boards become instable when they cannot work properly with the RAM
that's plugged in. As we are fast moving towards the 100 MHz system
bus as a standard, memory problems will become a lot more common. It
can easily be that a board only works reliably with RAM of only a
few memory vendors, other boards were designed and tested better, so
that you can throw virtually any memory at it, as long as it applies
to the basic specifications.
One way of testing
this out is of course overclocking. If the board is running stable
at a higher system bus than what it was designed for, it will most
likely be rock stable at the specified system clock. However,
testing a board to the limits is very difficult, because no board
manufacturer and neither any CPU manufacturer would tell you which
instructions are most sensitive to timing problems and overclocking.
So it's virtually
impossible saying that a board or a CPU run absolutely stable at a
particular clock speed, because it is very likely that the really
touchy procedures haven't been ran at all. This means for the reader
that you of course can be lucky as long as you are not using these
procedures on your system, but it could as well be that you are
using particularly the very software that will cause a crash in a
board that was testified as stable.
Summary
Finally, the
features of a board should be pointed out as well. I already
mentioned onboard SCSI, network adapter and sound, but there are
other things too. System monitoring can be an issue for people and
it's certainly not wrong if a board is equipped with it. It can tell
you if your fan stopped working, if your power supply fails or if
your CPU gets too hot.
The new wake up
features maybe worth a look at too, because it can save you from
leaving your system running permanently, thus saving energy. Wake up
on ring, on LAN and also on clock are features that I do appreciate.
These features are used best in combination with the 'suspend to
disk' feature, as well known from notebooks. AOpen is one of the few
manufacturers who have this feature implememted into their boards
for more than a year now. It starts your system exactly the same way
you left it. The same programs are running, the same data is still
there.
The above said
leads to the following new evaluation scheme for motherboards in
exactly this order:
1. Compatibility
and Reliability (AGP, PCI, ISA cards, BIOS, RAM)
2. Features
(onboard features)
3.
Performance (office performance and gaming performance)
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