Register FAQ / Rules Forum Spy Search Today's Posts Mark Forums Read
Go Back   MacRumors Forums > Apple Hardware > PowerPC Macs

Reply
 
Thread Tools Search this Thread Display Modes
Old Apr 16, 2006, 01:06 PM   #1
sk1985
macrumors regular
 
Join Date: Jan 2006
Overclocking an ATi card on a 12 inch 1.33 Ghz iBook.

I'm currently using Aticcelerator II to overclock my iBook's CPU. I was wondering what would be the maximum amount of Mhz to add to to the Card's CPU and memory (safely). I really don't want to mess up my computer so any ideas would be great.
sk1985 is offline   0 Reply With Quote
Old Apr 16, 2006, 02:14 PM   #2
TLRedhawke
macrumors 6502
 
Join Date: Sep 2004
It's usually the case that much more than a 10%-15% increase in speed will be unstable, but it's really not at a risk of harm until you start to encounter errors.
__________________
G4: Mac mini 1.25GHz; PB 12" 867MHz; PM Cube 450MHz;
G3: PB Pismo 400MHz x2; PM Beige 266MHz
TLRedhawke is offline   0 Reply With Quote
Old Apr 16, 2006, 02:18 PM   #3
calebjohnston
macrumors 68000
 
calebjohnston's Avatar
 
Join Date: Jan 2006
Send a message via AIM to calebjohnston Send a message via MSN to calebjohnston
If you really don't want to risk 'messing up' your iBook, then don't overclock it.
calebjohnston is offline   0 Reply With Quote
Old Apr 16, 2006, 02:29 PM   #4
sk1985
Thread Starter
macrumors regular
 
Join Date: Jan 2006
Quote:
Originally Posted by calebjohnston
If you really don't want to risk 'messing up' your iBook, then don't overclock it.
I really can't see how overclocking the CPU would mess it up. I'm more so interested in seeing what kinds of gains I can get while keeping the GPU stable. By messing it up I intended to say I want to keep my computer stable (i.e. No errors, overheating issues, or crashes).
sk1985 is offline   0 Reply With Quote
Old Apr 16, 2006, 03:24 PM   #5
topicolo
macrumors 68000
 
topicolo's Avatar
 
Join Date: Jun 2002
Location: Ottawa, ON
Quote:
Originally Posted by calebjohnston
If you really don't want to risk 'messing up' your iBook, then don't overclock it.
How exactly is that going to happen? electron migration? lack of heating leading to the chip burning out? Unlikely over the short term. What's more likely is that the chip (and it's the GPU we're talking about not the CPU since ATIcccelerator II doesn't do CPUs) will become unstable and sk1985 will get visual artifacts or his computer crashing.

My suggestion is to keep increasing the speeds a few Mhz at a time until you start getting crashes or artifacts and then lower it back down a few notches until it's stable. Every GPU is going to have different overclocking potentials. The one downside to overclocking your GPU is that there'll be a bit more of a power draw so your battery life might shorten, but if you're sitting at your desk with your ibook plugged in, then don't worry about it.
__________________
Do not disturb. Blood alcohol experiment in progress...
topicolo is offline   0 Reply With Quote
Old Apr 16, 2006, 09:46 PM   #6
sk1985
Thread Starter
macrumors regular
 
Join Date: Jan 2006
Quote:
Originally Posted by topicolo
How exactly is that going to happen? electron migration? lack of heating leading to the chip burning out? Unlikely over the short term. What's more likely is that the chip (and it's the GPU we're talking about not the CPU since ATIcccelerator II doesn't do CPUs) will become unstable and sk1985 will get visual artifacts or his computer crashing.

My suggestion is to keep increasing the speeds a few Mhz at a time until you start getting crashes or artifacts and then lower it back down a few notches until it's stable. Every GPU is going to have different overclocking potentials. The one downside to overclocking your GPU is that there'll be a bit more of a power draw so your battery life might shorten, but if you're sitting at your desk with your ibook plugged in, then don't worry about it.
Yeah I only play games while my iBook is plugged in. When the battery is in use I'd just put the GPU on it's stock frequency. Basically you stated my biggest fears (a system that crashes or has funny visuals). I was hoping that someone here would already have done the trial and error and just known what the 9550's max limits are. I guess I'll just start playing around with it a bit.
sk1985 is offline   0 Reply With Quote
Old Apr 16, 2006, 09:56 PM   #7
mikemodena
macrumors 6502a
 
mikemodena's Avatar
 
Join Date: May 2005
Location: Connecticut
Send a message via AIM to mikemodena
Quote:
Originally Posted by sk1985
Yeah I only play games while my iBook is plugged in. When the battery is in use I'd just put the GPU on it's stock frequency. Basically you stated my biggest fears (a system that crashes or has funny visuals). I was hoping that someone here would already have done the trial and error and just known what the 9550's max limits are. I guess I'll just start playing around with it a bit.
I bumped it 25% and I can say that it is completely stable at that level. I was too chicken to push it more
mikemodena is offline   0 Reply With Quote
Old Apr 17, 2006, 07:34 AM   #8
ITASOR
macrumors 601
 
ITASOR's Avatar
 
Join Date: Mar 2005
Location: Oneida, NY
Send a message via AIM to ITASOR
Actually, besides just having it crash, you can fry the graphics card...read the comments on MacUpdate about it.
__________________
11.6" MBA | 4GB | 64GB
ITASOR is offline   0 Reply With Quote
Old Apr 17, 2006, 09:02 AM   #9
mikemodena
macrumors 6502a
 
mikemodena's Avatar
 
Join Date: May 2005
Location: Connecticut
Send a message via AIM to mikemodena
Quote:
Originally Posted by ITASOR
Actually, besides just having it crash, you can fry the graphics card...read the comments on MacUpdate about it.
Yeah, I read that when I got done playing and put it back to stock. I'll stick to gaming on the G5
mikemodena is offline   0 Reply With Quote
Old Apr 17, 2006, 10:49 AM   #10
calebjohnston
macrumors 68000
 
calebjohnston's Avatar
 
Join Date: Jan 2006
Send a message via AIM to calebjohnston Send a message via MSN to calebjohnston
Quote:
Originally Posted by ITASOR
Actually, besides just having it crash, you can fry the graphics card...read the comments on MacUpdate about it.

That's what I was talking about before. "Messing up" your computer. The company would have raised to any given level if it was entirely safe.
calebjohnston is offline   0 Reply With Quote
Old Apr 17, 2006, 01:14 PM   #11
sk1985
Thread Starter
macrumors regular
 
Join Date: Jan 2006
Quote:
Originally Posted by ITASOR
Actually, besides just having it crash, you can fry the graphics card...read the comments on MacUpdate about it.
Yeah but I imagine people must have overclocked the hell out of their cards.
sk1985 is offline   0 Reply With Quote

Reply
MacRumors Forums > Apple Hardware > PowerPC Macs

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
thread Thread Starter Forum Replies Last Post
Is the 2.66 GHz 12 Core worth it? Fesco Mac Pro 10 Dec 1, 2011 02:14 PM
Need advice- How Bad Will Leopard Be With 512 MB of Ram on a 1.33 Ghz iBook? technomuffin PowerPC Macs 10 Sep 5, 2010 10:18 PM
Trade 1.33 gHz iBook G4 for 1 gHz PB G4? Xeem PowerPC Macs 3 Apr 4, 2007 08:05 PM
Help! 12 inch 1.5 ghz PB or Macbook pro? crazydrumma Buying Tips and Advice 11 Feb 1, 2006 12:38 PM
ibook g4 12 inch 1.33 ghz new - sleep length? steelfist Macintosh Computers 10 Aug 27, 2005 01:11 PM


All times are GMT -5. The time now is 04:34 AM.

Mac Rumors | Mac | iPhone | iPhone Game Reviews | iPhone Apps

Mobile Version | Fixed | Fluid | Fluid HD
Copyright 2002-2013, MacRumors.com, LLC