Re: P5P800 SE overclocking problem
- From: nospam@xxxxxxxxxx (Paul)
- Date: Sat, 05 Aug 2006 21:04:16 GMT
In article <g8m9d29ju0nren8qds01121oii2mtip73a@xxxxxxx>, Larc
<larc-news@xxxxxxxxxxxxxxx> wrote:
I recently got a P5P800 SE and a Pentium D 805 in hope of being able to2.93 GHz,
overclock some. When I use the "auto" system in CMOS to OC by 10% to
everything is fine. The CPU temp hardly goes up at all. But when I try to OCCMOS and
by 20% to 3.2, WinXP won't load. The error message is
"Windows could not start because the following file is missing or corrupt:
WINDOWS\SYSTEM32\CONFIG\SYSTEM"
Of course that's not a file at all, but a folder. When I go back into
revert to 10% OCing, XP starts with no problem.
The computer runs smoothly at 3.2 GHz. The temp goes up a little, but the CPU
still idles at about 39C. Is there anything I can do to get XP to cooperate?
Thanks for any help.
Larc
Your motherboard has an "AGP/PCI Frequency (MHZ)" setting. Values
are 66/33, 72/36, and 80/40.
In the description of the ICH5, it says the IDE strobes are
generated with a 133Mhz base clock, which implies to me the
clock comes from 2xhub_bus_clock, where the hub_bus_clock is
one and the same as the AGP clock. In other words, I see a
danger, that if the AGP is raised to the 80/40 value, that
could corrupt the IDE interface.
I would go into the BIOS and change "AGP/PCI Frequency (MHZ)"
from [Auto] to [66/33], to try and ensure the IDE port runs
at standard speed.
Also, when overclocking an Asus board, do not use the automatic
overclocking feature. It tends to downclock the memory (run
memory at DDR320 when it could go at DDR400) and on some boards
has set the Vcore too high. You should be setting everything
on the board to the manual settings, and overclocking
it that way. You'll get better results.
PentiumD 805 draws an awesome amount of Vcore current. In one
demonstration, a system running an 805 at 4GHz, was seated on
a piece of insulating foam on a table. After the experiment
was finished, the foam insulation underneath the Vcore
regulator area was melted. So you likely won't be making it
to 4GHz for that reason (stress on Vcore).
Cheap LGA775 motherboards use three phase regulators, which
are fine for running a wide range of processors, even high
end stuff. But asking a three phase regulator to provide
165W for a drag racing experiment, is going a bit too far.
You should be able to get a good overclock, but watch the
temperature of the components in the Vcore area around
the processor. If you cannot hold a finger on the stuff
without getting burned, that is probably going far enough.
Paul
.
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