Athlon 64 2800+ including a new AMD motherboard. I also upgraded my graphics
card from NVdia 8Mb Vanta to ATI Radeon 9600 256Mb, and my hard disk from 20Gb
to 120 Gb, as well as the memory from 64Mb to 512Mb. However, I still use the
same old casing, with one fan. It keeps
shutting down after quite sometime and reboots. What could be the
Sounds like you’ve upgraded your machine quite nicely. I’m guessing it runs
much faster, and much smoother.
Until it dies, of course.
There’s one component you didn’t upgrade that I suspect as being the likely
cause of your problem.
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Most people consider the CPU to be the heart of the computer. I don’t look
at it that way. The brains, maybe, but not the heart.
Your power supply is the true heart of your PC. Quietly, or not so quietly,
pumping out electricity at the various voltages required by the various components
of your computer, the power supply is an often over looked, and under appreciated
component. I mean, when was the last time you saw anyone get excited about a
With the changes you’ve made, it’s likely that your new computer is drawing
more power than your old one, and it’s quite possible that your power supply
isn’t keeping up. It could easily be overheating and shutting down after you
use it for a while.
You mention that it’s the “old casing with one fan”. Chances are that one
fan is on a small box and that small box is your old, probably tired, power supply.
That would be my first guess, and the very first thing I would replace. It’s
probably rated for some number of watts – I’d now get one at double that rating.
The other thing that your new components are probably doing is also generating
more heat. It’s possible that your power supply is ok, but that one fan isn’t enough to
keep the motherboard and other components from overheating. This is relatively
easy to test … keep the cover off of your computer, and get a table-top fan
to blow air at it. If it stays running, then one way or another, you’re probably
overheating when the box is closed.
The solution may well be the same. That more powerful power supply I mentioned
above may well include a more powerful fan capable of moving more air. Alternately,
you might see if you can mount a second fan in your case to help move air through.
There’s also a small chance that the problem is only the CPU overheating. If it
doesn’t already have a fan mounted directly on or over it, you might look into adding
that as well.
Your new motherboard probably has thermometers in various places to help measure
the state of various components. Check out Motherboard Monitor,
a free tool that will report your CPU’s temperature among other things. It’s a tad
geeky, but there’s good information.