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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: Effy on July 25, 2004, 03:12:15 PM

Title: how fast can you overclock a 1220/4 28 Mhz ???
Post by: Effy on July 25, 2004, 03:12:15 PM

http://www.amiga-hardware.com/blizzard1220.html (http://www.amiga-hardware.com/blizzard1220.html)

Got one of these in my RBM tower and got also a Speedmaker to change mhz. How fast can one overclock such a 68020/28Mhz ???

Title: Re: how fast can you overclock a 1220/4 28 Mhz ???
Post by: Brian on July 25, 2004, 03:23:13 PM

I don't thik you can overclock it (more as it's actually overclocked from 25Mhz already) as it take it's clock from the Amiga, the crystal socket available is only for FPU clock.

Title: Re: how fast can you overclock a 1220/4 28 Mhz ???
Post by: Effy on July 25, 2004, 08:19:38 PM

If it takes its clock from the A1200 then it should be only 14 Mhz,not ???

Title: Re: how fast can you overclock a 1220/4 28 Mhz ???
Post by: Holley on July 25, 2004, 08:23:41 PM

14MHz, times two ;-)

I had an Appollo 020, don't think it would take kindly to overclocking - much better idea to get a cheap '030 card ...

Title: Re: how fast can you overclock a 1220/4 28 Mhz ???
Post by: Lemmink on July 25, 2004, 09:47:48 PM

Thats right, the B1220 takes it clock from the A1200 mobo and multiplies it. Th next step would be 42 MHz if you find the multiplicator and a way to change it, but I highly doubt, that the 68020 will take so much pain.
The crystalsocket is just for the FPU in case you want to clock is asyncronusly.

Title: Re: how fast can you overclock a 1220/4 28 Mhz ???
Post by: Effy on July 27, 2004, 07:26:57 AM

Okay then, thanx for the info even though it wasn´t that positive  :-)