 |
 |
Sawtooth 350 overclocked to 450!
|
|
|
|
|
corwin
|
|
I overclocked my G4/350 Sawtooth to 450Mhz! Its a rev 2.6 cpu! I also made a web page detailing the procedure. http://webusers.warwick.net/~u1034376/web/
Has anybody else achieved a 100mhz speed boost from a G4, perticularly a sawtooth?
|
|
|
| |
|
|
|
|
|
|
|
Mac Elite
Join Date: Jun 2000
Location: Pasadena
Status:
Offline
|
|
I'm sure it's not hard to do, however, getting a 100Mhz speed bump, I'd imagine you are getting a few more crashes than you used to...maybe not, 'cuz I bought the 450 sawtooth. Well, just letting you know that inorder for the CPU to run well at the OC'd speed, you "Should" alter the core voltage. The massive heat-sink should be good enough for cooling though. Increasing the core voltage will require delicate soldering skills, but will reduce crashes if successful...just my $.02
|
|
G4/450, T-bird 1.05GHz, iBook 500, iBook 233...4 different machines, 4 different OSes...(9, 2k, X.1, YDL2.2 respectively) PiA to maintain...
|
| |
|
|
|
|
|
|
|
corwin
|
|
Nope, I did not touch the Vcc for the chip. I havent had a single crash related to the cpu, just bad software and beta Voodoo 3 drivers. It's the types of crashes that normally occure.
However, if I try to speed up the backside cache over 225Mhz it will crash. so it looks like 450 is the max I can go because of the backside cache. I wonder if I could modify the huge heatsink to cover the cache chips? Has anybody tried this?
-corwin
|
|
|
| |
|
|
|
|
|
|
|
Mac Elite
Join Date: Jun 2000
Location: Pasadena
Status:
Offline
|
|
You could "underclock" your L2 cache using a 3rd party utility like Xlr8's MACh speed control. But I wouldn't recommend you going above 450 for a few reasons.
1. Apple didn't ship the 500 machine because of the infamous bug with the G4 CPU that has problems going above 500 Mhz. If all the G4 CPUs can be rated at 500, why do you suppose we've been stuck at this speed for a year?
2. Though the massive heat-sink in the G4 is definitely big enough and good enough to get rid of the extra heat generated by the CPU, but going over 100Mhz in overclocking might have disatrous effects. I haven't heard anyone burning out a G4 yet, but I've definitely heard people who has burnt out G3 Mobos and CPUs with their OC...So I wouldn't try pushing it too hard, at least for the time being, when 450 is still "good enough."
With that said, if you still wanna try it out yourself, go right on ahead. Again, you can underclock your L2 cache to be less than 2:1 ratio using 3rd party software. Goodluck.
|
|
G4/450, T-bird 1.05GHz, iBook 500, iBook 233...4 different machines, 4 different OSes...(9, 2k, X.1, YDL2.2 respectively) PiA to maintain...
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
 
|
|
|
Forum Rules
|
|
|
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
|
HTML code is Off
|
|
|
|
|
|
|
|
|
|
|
|
|
Top
