Berkeley CSUA MOTD:Entry 15529
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2025/05/24 [General] UID:1000 Activity:popular
5/24    

1999/3/3 [Computer/HW/CPU] UID:15529 Activity:high
3/3     What are the cons to overclocking say a Celeron 300 to 550 Mhz?
        \_ Celerons are clock-locked at 4.5.
        \_ Celeron 300As are clock-locked at 4.5.
           450 ~= 4.5 x 66 bus
           550 ~= 4.5 x 125 bus

           PCI bus is 33 MHz, but the board only comes with 1/2 and 1/3
           dividers. 125/3 = 42 MHz, ~ 25% over-stress on PCI cards.  Most
           likely this will fail because one or two PCI cards will choke;
           graphics cards heat up, too.  Christ, 450 is fast enough.
           \_ What's a good 112 MHZ mainboard? If the board manufacturer
              knows that the divider won't line up with PCI standards
              why do they release it? Why can't dividers be differant than
              1/2 or 1/3?
              \_ people think "oh, it can support 112/125/133" it must
                 be cooler than this one that's "slower".  Most PCI cards
                 are ok up to 112 MHz (1/3 divider), ~10% stress.  I heard
                 the new Coppermine is going to do 133 MHz bus (1/4 PCI
                 divider) -- the divider things are hard-wired and are
                 expensive to make variable or to put more on
           \_ dual celeron 400 over-clocked on 75mHZ board gives 450mHZ
              how comparable is this to a  pII450
              \_ is this a troll?
2025/05/24 [General] UID:1000 Activity:popular
5/24    

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