Extreme Amiga overclocking.

[PMC]

Yeah,

I bought a stock Apollo 25Mhz '040 some years back.  Knowing that '040's have cooling issues I overclocked it.  First to 28Mhz, then 33Mhz and finally 40Mhz.  

Worked a treat.  At least it did until the chip fan decided to detach itself...  I now am presented with a red screen upon startup.

Oops.

[PMC]

@Blob,

Well, it worked for over four years at 40Mhz with no problems with stability.  

For good measure I installed a heatsink between the CPU and fan, but I foolishly failed to periodically check the adhesion between the heatsink and fan.  

I'll check the ROMs as you suggest and will report back.

[PMC]

@BoingBoss

Well, I agree in principle that an overclocked system can run hotter and be prone to unreliability, but there are methods of mitigating these factors.

Paying attention to cooling goes without saying, and you'll find that several accelerator cards are retailed new running at higher clock rates than is actually shown on the CPU.  Amiga Format ran an article back in July / August 1998 when they researched the subject which might well be worth seeking out.

Fact is, there are people out there who want to play Quake or use CPU intensive image processing software on their Amigas.  If they're willing to take the risk of irreversible damage to their CPU and take all practical precautions then fair play I guess.

[PMC]

BoingBoss wrote:

My system is an Amiga 2000 Series computer, the highest quality Amiga, so NO, my system is working just fine.  

Hi BoingBoss

Are you experiencing any instability with your system at 28Mhz, or are you simply downclocking to 25Mhz just to stay within the stated rated speed of the chip?

Assuming you're not experiencing any stability issues, I'd say you'd be better off seeking out an '060 board as you suggest.  That way you'll be able to play mp3 file etc without having to overclock a system in order to do so.

Assuming you are experiencing stability issues, it might not neccessarily be the hardware.  You might want to try starting your system with no startup sequence, or commenting out some of the programs launched in the script to see if any one individual program is causing you problems.  

Good luck!

[PMC]

[PMC]

I once turned down sex to watch Star Trek II... The young lady involved was NOT impressed... I wasn't even that interested in watching the film either (I'd seen it countless times before :-s )

I'm not surprised she wasn't impressed!  Was she THAT bad?

 :-o

Couldn't you have done the decent thing as just gone out on the lash with your mates instead?  She's have probably been able to deal with that one.

Actually, I know a guy who turned down sex to go mountain biking...  Before you ask, no it wasn't me!

Just had an idea from a new thread....