overclocking

Fragger

Fragger

Lorem Ipsum
hmm... i haven't posted in a while...

At any rate, I was wondering if anybody has ever tried to overclock any sort of apple-used processor before. I don't know off hand what temperatures the newest G4's run at; but I have been thinking they may have some room to "burn" (hehe)

This has been a secret dream of mine for a while :)

graham
 
i would think the ibook would be the worst thing to overclock due to its density and such. Interestingly I've heard rumors of Athlons being cooled with liquid nitrogen resulting in some insane speed increase. I'm curious as to who has enough spare time (and cpus) to pull off such a feat.
(my friend has a big tank, and liquid nitrogen costs very little)

:) graham
 
There's a thread around here somewhere about someone overclocking his DP 1-GHz machine to 1.2 GHz or some such. Heavens to Betsy! who'd want to mess around with THAT?
 
Oh well, I was using an iBook 500 and overclocked it to 600MHz/100FSB by following that web site. It worked fine for half an year and now I have already sold it.

:)

I am running on PowerBook 667 now!
 
I've overclocked two iMacs, a 333 MHz to 400 MHz, and a 233 MHz to 266 MHz, both are perfectly stable, although the 266 MHz iMac ran a little too hot, so I applied some silicon "cooling paste" between the processor and the heatsink. All Macs can be overclocked, but it's WAY harder than overclocking PCs. On PC's there are usually just jumpers to set on the CPU card, on Macs you have to move resistors on the daughtercard, in some cases even on the motherboard, which means you'll have to solder in your Mac, which is absolutely NOT recommended. Of course it'll void the warrianty, and if anything goes wrong, you'll have to replace the daughtercard or the motherboard, which is not cheap. You have been warned.

http://www.bekkoame.ne.jp/~t-imai/menue1.html and http://www.xlr8yourmac.com
 
Originally posted by ksv
All Macs can be overclocked, but it's WAY harder than overclocking PCs. On PC's there are usually just jumpers to set on the CPU card, on Macs you have to move resistors on the daughtercard, in some cases even on the motherboard, which means you'll have to solder in your Mac, which is absolutely NOT recommended. http://www.bekkoame.ne.jp/~t-imai/menue1.html and http://www.xlr8yourmac.com
Click to expand...

Hehehe.
The B/W Macs were also 'just' jumpers to move for overclocking (I bumped mine from the 350MHz starter system to 450MHz. The top line model at this time :D )

As for the easiness of overclocking PCs:
If you got a System that you have to overclock via jumpers, you have one of the harder to overclock. Usually, you can do the whole overclocking via the BIOS. You don't even have to open your box!
 
Originally posted by ddma
Heehee, anyway to overclock via the OpenFirmware?

:p
Click to expand...

In fact, you can overclock the bus on the Sawtooth G4 via OpenFirmware. Still, you'll have to move some resistors to lower the multiplier that configures the CPU speed, if else you'd overclock a 400 MHz CPU to 532 MHz setting the bus to 133 MHz instead of 100 MHz, and such high speeds only work insome cases. In addition, you'd have to change out the RAM with PC-133 RAM.
 
And, yeah, the B/W G3s and the Yikes G4s (those without AGP) could be OCed with jumpers, but these are the only ones, I think.
On several G3/G4 upgrade cards you can even set the bus/CPU speed with switches :)
 
Yea, I did overlock my office's B/W G3 350 to 400MHz by setting those jumpers on the motherboard. Shhhh... don't tell my boss!!

:eek:
 
Originally posted by ddma
Yea, I did overlock my office's B/W G3 350 to 400MHz by setting those jumpers on the motherboard. Shhhh... don't tell my boss!!

:eek:
Click to expand...

Hehe ;)
Tried 450 MHz?
It could work... :p
 
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