PIII 667 Overclocking...

[m0rph3us-old]

Hi guys,

I just bought a new motherboard and CPU and i'm trying to overclock it. I read that with Inter the CPU multiplied can't be changed but only FSB can be used for overclocking

Here are my specs:

PIII 667 133MHZ System Bus FC-PGA 256K L2 Cache

Motherboard:
MSI 815E Pro (MS-6337) Onboard sound and video
128MB SDRAM 133MHZ

I know this isn't a "Dream Machine" but i still want to safely overclockit.

I want to overclock safely without the aid of any external cooling devices. Just its retail fan.

Thanks in advance for your input

 

[Dark4ng3l]

Okay I highly suggest you dont overclock your cpu.
1.I highly suggest you dont o/c with the crappy retail fan
2. buss speeds >133MHz will run your pci and agp busses out of spec(very bad for lesser quality hard drives)
3. You need good memory to run your bus >133MHz witch you probably dont have(you want to o/c with only the crappy retail hsf)
4. You probably would not get enough of a boost to justify the risks.(5*133= 667, 5*150= 750(highly unlikely without good memory))

 

[m0rph3us-old]

obviously i would increase the divider for PCI bus so that PCI is always around 33MHZ.

 

[Dark4ng3l]

Only one problem... No chipset has the proper dividers for bus speeds over 133MHz.

 

[m0rph3us-old]

so no go then?

aww.. that bites

 

[Dark4ng3l]

you can always try for 140 or so bus. 140/4= 35 so it's not that bad.

 

[max105]

you can downclock your memory to run at 100 while your p3 is running 133...that way your memory won't be much out of spec, or none at all if its pc133 memory. my friend clocked his 667 to 150fsb and it ran fine. just downclock your memory and it should be fine.

 

[Dark4ng3l]

<< you can downclock your memory to run at 100 while your p3 is running 133 >>



That's a feature use only in via chipsets, he uses and 815E chipset with definately does not support asynchronous bus speeds.

 

[Wingznut]

The i815e chipset DOES support asynchronous bus speeds.

 

[max105]

yea i'm running an CUSL2 with the 815E chip, and from what I can see in the BIOS.. it DOES have the option to run memory at 100 while cpu at 133 fsb

 

[Dark4ng3l]

Ok i guess I was wrong