Archived from groups: alt.comp.hardware,alt.comp.hardware.overclocking.amd (
More info?)
kony wrote:
> On Mon, 7 Jun 2004 06:02:45 -0500, "Sorrow" <jcboget@yahoo.com> wrote:
>
>>> As Wes pointed out, the default multiplier on those is 13X, not
>>> 12.5X. Adjust rest of what I posted accordingly, you may still be
>>> able to run 13 X 166MHz FSB though you may be at the point where
>>> average CPU vCore voltage needs 1.725, give or take +-.05V
>>
>> The only things that I changed in the BIOS was the FSB (to 166MHz)
>> and
>> the value for "CPU Voltage Regulator" in the "Power BIOS Features"
>> area. That last I changed to 1.7. Prime95 ran fine for about 6+
>> hours and then it locked up.
>
> One thing important to mention, is that some systems can't even run
> Prime95 all day when they're NOT overclocked! A baseline is
> important. In other words, before any test you should've already used
> same test with system at stock speed, or at least rerun test that
> fails, at stock speed.
>
>> I was running MBM5 at the time and having it log. Below is the
>> first and last readout in that log. Do these numbers seem right?
>> Are any too low/high?
>>
>>
+-------------------------------------------------------------------------+
>>> Total number of readouts: 533 CPU Speed: 2176 MHz
>>> | Running from: 6/6/2004 7:16:29 PM until: 6/6/2004 8:45:34
>>> PM |
>>
+-----------------------------+----------+----------+----------+----------+
>>> Sensor | Current | Low | High |
>>> Average |
>>
+-----------------------------+----------+----------+----------+----------+
>>> Case | 32° C | 31° C | 32° C | 31°
>>> C | CPU | 64° C | 52° C | 66° C
>>> | 63° C | Sensor 3 | 0° C | 0° C |
>>> 0° C | 0° C | Core 0 | 1.60 V |
>>> 1.58 V | 1.60 V | 1.60 V | Core 1 |
>>> 1.66 V | 1.65 V | 1.71 V | 1.67 V | +3.3
>>> | 2.59 V | 2.56 V | 2.66 V | 2.60 V | +5.00
>>> | 5.00 V | 4.97 V | 5.00 V | 4.98 V | +12.00
>>> | 11.86 V | 11.80 V | 11.92 V | 11.85 V |
>>> -12.00 | -7.09 V | -7.17 V | -7.09 V |
>>> -7.10 V |
>>> -5.00 | -1.27 V | -1.27 V | -1.25 V |
>>> -1.27 V | Fan 1 | 1513 RPM | 1328 RPM |
>>> 1534 RPM | 1339 RPM | Fan 2 | 0 RPM | 0
>>> RPM | 0 RPM | 0 RPM |
>>
>>> Fan 3 | 4891 RPM | 4687 RPM | 4891 RPM |
>>> 4807 RPM |
>>
+-----------------------------+----------+----------+----------+----------+
>>
>>
>>
+-------------------------------------------------------------------------+
>>> Total number of readouts: 1432 CPU Speed: 2176 MHz
>>> | Running from: 6/6/2004 7:16:29 PM until: 6/6/2004 11:14:57
>>> PM |
>>
+-----------------------------+----------+----------+----------+----------+
>>> Sensor | Current | Low | High |
>>> Average |
>>
+-----------------------------+----------+----------+----------+----------+
>>> Case | 33° C | 31° C | 33° C | 32°
>>> C | CPU | 64° C | 52° C | 66° C
>>> | 64° C | Sensor 3 | 0° C | 0° C |
>>> 0° C | 0° C | Core 0 | 1.60 V |
>>> 1.58 V | 1.60 V | 1.60 V | Core 1 |
>>> 1.66 V | 1.63 V | 1.71 V | 1.67 V | +3.3
>>> | 2.61 V | 2.54 V | 2.66 V | 2.60 V | +5.00
>>> | 4.97 V | 4.97 V | 5.00 V | 4.98 V | +12.00
>>> | 11.86 V | 11.73 V | 11.92 V | 11.85 V |
>>> -12.00 | -7.09 V | -7.17 V | -7.09 V |
>>> -7.10 V |
>>> -5.00 | -1.27 V | -1.27 V | -1.25 V |
>>> -1.27 V | Fan 1 | 1520 RPM | 1328 RPM |
>>> 1555 RPM | 1451 RPM | Fan 2 | 0 RPM | 0
>>> RPM | 0 RPM | 0 RPM | Fan 3 | 4891
>>> RPM | 4687 RPM | 4891 RPM | 4808 RPM |
>>
+-----------------------------+----------+----------+----------+----------+
>>
>
> In first readings the core voltage was dropped down to 1.65... your
> motherboard may be somewhat limiting your overclock. You might try
> running at lower voltage, it seems your temp, at 66C, was too high for
> comfort when overclocking.
>
> The 12V reading, @ 11.73, is within acceptable limits yet also looks
> to be dipping a bit, but could also be the motherboard's fault. You
> could take a 12V reading at a power supply plug with a multimeter and
> compare to the motherboard monitor reading, and further compare what
> MBM shows with system not overclocked. It's not really important to
> do that though, but you ought to check the 12V reading at hard drive
> to confirm that only the motherboard is seeing these dips.
>
> Basically I suspect the CPU is getting too hot, so your options are a
> better heatsink, trying a lower voltage, and/or reducing clock speed
> some.
>
> An alternate way of doing it might be to lower the voltage to 1.65V,
> then adjust FSB as high as it'll go while staying stable @ 1.65V...
> just depends on how much work you want to put into that last couple
> hundred MHz.
That +3.3v is very low. Not that it will necessarily be a problem. Mine was
running similar levels but stable (XP1800+@2.1Ghz), however, I elected to
replace the PSU anyway. The graphics card runs off the 3.3v and, in a lot of
cases, the graphics card is the most expensive component in a PC, not worth
risking it.
Luck,
--
~misfit~
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