FSB Troubles

  • Thread starter Thread starter Jeff
  • Start date Start date
J

Jeff

Hi,

(I'm having trouble with my mailer sorry if this is a double post)

Don't know if anyone here will know the answer but it's worth a try. I
have an EPoX 4SDA5+ motherboard with one stick of 512 MB PC2700 RAM. I
have a P4 2.4bGHz CPU in it. I have noticed that my CPU is running at
1.8GHz and not the 2.4GHz I expected. I have checked my BIOS settings and
the CPU Clock is set to 100 instead of 133 which is the cause of this.
However when I up the CPU clock windows fails to boot.

I have flashed the BIOS with the most resent version. I have updated the
SiS 648 chipset drivers from the SiS website and it's made no difference.
Anybody got any ideas?

Full Specs:-

P4 2.4bGhz CPU
512 MB PC2700 Samsung RAM
EPoX 5SDA5+ Motherboard
128MB Radeon 9800 Pro
450 Watt PSU
 
Jeff said:
Hi,

(I'm having trouble with my mailer sorry if this is a double post)

Don't know if anyone here will know the answer but it's worth a try. I
have an EPoX 4SDA5+ motherboard with one stick of 512 MB PC2700 RAM. I
have a P4 2.4bGHz CPU in it. I have noticed that my CPU is running at
1.8GHz and not the 2.4GHz I expected. I have checked my BIOS settings and
the CPU Clock is set to 100 instead of 133 which is the cause of this.
However when I up the CPU clock windows fails to boot.

I have flashed the BIOS with the most resent version. I have updated the
SiS 648 chipset drivers from the SiS website and it's made no difference.
Anybody got any ideas?

Full Specs:-

P4 2.4bGhz CPU
512 MB PC2700 Samsung RAM
EPoX 5SDA5+ Motherboard
128MB Radeon 9800 Pro
450 Watt PSU
Click to expand...

OK, other components of your PC are often referenced to the CPU clock. If
you change the CPU clock, you must also change other settings to match.
First thing to check is make sure your DRAM timing control is set to "by
SPD". Then make sure your CPU/DRAM ration is "by SPD". If that doesn't
work, try CPU/DRAM ratio of 4/5. If that doesn't work, try CPU/DRAM ratio
of 1/1. (slightly underclocking your RAM) Note that your RAM is DDR, so if
you bump up the CPU clock to 133, set the CPU/DRAM ratio to 4/5, this will
run your RAM at 166 (333). At 1/1 ratio, you'd be running 333 RAM at 266.
If THAT doesn't work, you've got serious hardware problems. (!) -Dave
 
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