- CPU: Motorola MC68010 overclocked to 14.2 MHz, 16KB cache memory.
- STORAGE: 270MB Seagate SCSI hard drive, 1.76 MB HD floppy
- VIDEO: Full ECS chipset.
- MEMORY: 4MB Fast RAM, 2MB Chip RAM.
- SCSI CONTROLLER: GVP A500 HD+.
Welcome to the Amiga Overclocking Website. Here you can learn how to maximise your Amiga's performance at minimum cost. I have a very extensive overclocking experience -I have been overclocking since 1975 - when I
first overclocked a calculator to make it faster than those belonging to my schoolmates! Overclocking is a process where the equipment being overclocked is made to run faster than it's design speed. This is usually
achieved by changing the "oscillator module" by one rated at a higher frequency. It is a somewhat controversial procedure - some like myself swear by it and overclock everything that isn't bolted down! Others see it
as totally evil - even worse than Micro$oft - and claim that it will melt your computer and fry your cat!. Perhaps some people have a problem with the concept of "getting something for nothing" which is basically
what overclocking is all about.
There are a number of practical considerations to bear in mind when attempting an overclocking project. Firstly is the computer being modified of "synchronous" or "asynchonous" design? Synchronous is where the CPU is
clocked at a speed which is a direct multiple of the main clock which runs the entire computer. Examples of a synchronous computer are standard A500, A1000, A1200 and A2000s. These machines are not easy to overclock,
although, it is possible. A3000 and A4000s are of asynchonous design, having a separate oscillator for the CPU and are easier to overclock. If you have an accelerator card in your Amiga, chances are that it is
asynchonous. I have also found over the years that more recently made versions of a particular chip will often overclock to a higher frequency. For example you would be more likely to get better results from a 4 year
old 68030 compared to one that is 7 years old. Likewise you will usually get less from a chip at the top of it's range compared to a lesser rated one. For example you will usually be able to overclock a 25MHz 68030
further than a 50MHz 68030.
The second consideration is heat generation. Due to increased capacitive and inductive losses at the higher frequencies, the CPU (and sometimes other associated chips) will run hotter. Care must be taken to ensure
they are cooled properly to avoid crashes or possible damage. Cooling would have to be the most important part of overclocking. Despite what critics say, I have NEVER
had any damage caused by overclocking, however it is best to be cautious, especially when an expensive PPC chip is involved. Thirdly you need to bear in mind that the accelerator card itself will also limit maximum
possible overclocking speeds. A good example is the Commodore A2630 which cannot be clocked past 29MHz - even if you install a 50MHz 68030 in it.
Finally, bear in mind you will void any warranty applying to your equipment. Of course, I will not be held responsible for any damage caused by carrying out the modifications listed here. They are done at your own
risk. Listed below are several links to the different Amiga CPUs I have overclocked, as well as other associated chips and hardware. Click on them for more information. I currently have no information for any
hardware not listed here.
Other Amiga overclocking sites.
Australian Amiga User Groups.
Other Amiga links.
Other links of interest.
- Overclockers Australia Australian PC overclocking site. Contains interesting tech news.
- Overclocking PPC-A Mac-specific site, but nonetheless, interesting.
- Speedy A fascinating overclocking gadget for Macs, useable on Amigas - a variable clock oscillator!
- Extreme ICE An Australian PC overclocking site
- Fast Graphics Site Overclocking PC graphics cards. Some information may be relevant to Amiga graphics card owners.
- Boycott Microsoft Compulsory surfing here! (Sadly this site has not been updated for some time)
- Dave's Bear Den My personal homepage. Best viewed with an open mind!
You can email me at: davem2at iinetdot netdot au
This site was introduced 26th June 1998. Updated 5th June 2004. Rev 1.32. Under Construction.