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TBi

macrumors 68030
Jul 26, 2005
2,583
6
Ireland
Would any of the overclocking help the Air to run GTA IV? I was able to play the game on the Air with the stock settings; however the game would typically crash on me about 20 minutes of playing. Would it be worth testing it again while OC'd to 2.4 to 2.5 Ghz?

I don't think so... If the crashes are software related then it's gonna crash again, if they are heat related then it will crash faster and may cause damage.

I dunno, seems like common sense...
 

gman901

macrumors 6502a
Sep 1, 2007
607
14
Houston, TX
Okay, I won't bother with it. I am trying to use nTune to overclock the motherboard, but I am getting a failure when moving the slider to 2505ghz. Do I need to also move the voltage up, and if so, to what number? I am running the 20 minute auto tune program to see if this makes it any easier to bump up the clock speed.
 

lucifiel

macrumors 6502a
Nov 7, 2009
982
2
In your basement
Okay, I won't bother with it. I am trying to use nTune to overclock the motherboard, but I am getting a failure when moving the slider to 2505ghz. Do I need to also move the voltage up, and if so, to what number? I am running the 20 minute auto tune program to see if this makes it any easier to bump up the clock speed.

if you can auto-tune, you're using the wrong version of ntunes.

upgrade to 6.05, I had the same problem before.
 

bloodycape

macrumors 65816
Jun 18, 2005
1,373
0
California
If heat is a issue do you think on of those cooling pads could help lower the temps a little to help with the ocing? I know when I had an nvdia based card in my old pc rig I had to use custom drivers to help better overclock the gpu with out any stability issues or having the clock speed being locked.

BTW how does SetFSB work on the MBA(or any mac with windows on it)?
 

gman901

macrumors 6502a
Sep 1, 2007
607
14
Houston, TX
Ah! You are right! I noticed I installed version 5.5. I wonder why Nvidia's site only offered up this version to me? Since you pointed that out, I am wondering if I installed the most updates Nvidia drivers for the 9400M. I think it gave me version 186.xxx.xxx. Does that seem right?
 

gman901

macrumors 6502a
Sep 1, 2007
607
14
Houston, TX
Okay, I could not find the 6.05 Ntune version, but I found the newest version 6.10. It installed Nvidia System Monitor, Performance and System Update. When I go to the Performance application, I noticed there are graphical tabs on the top showing the cpu, motherboard, memory, etc. When I go to the first tab (cpu) and try sliding the clock speed up about 300 ghz, and then hit apply, nothing happens. The slider reverts back to the default and does not stick to the level I chose or increase the clock speed. What am I doing wrong and what should I do to increase the clock speed correctly?:confused:
 

lucifiel

macrumors 6502a
Nov 7, 2009
982
2
In your basement
Okay, I could not find the 6.05 Ntune version, but I found the newest version 6.10. It installed Nvidia System Monitor, Performance and System Update. When I go to the Performance application, I noticed there are graphical tabs on the top showing the cpu, motherboard, memory, etc. When I go to the first tab (cpu) and try sliding the clock speed up about 300 ghz, and then hit apply, nothing happens. The slider reverts back to the default and does not stick to the level I chose or increase the clock speed. What am I doing wrong and what should I do to increase the clock speed correctly?:confused:

i dunno where you're looking but try this link for 6.05 clicky
 

gman901

macrumors 6502a
Sep 1, 2007
607
14
Houston, TX
6.05 seems to work... when I applied the change to 2505 ghz cpu, it took and the performance monitor shows the clock speed at 2505ghz. However, when I ran Geekbench, I keep getting around score of 2400. Also, when I tried playing Mass Effect, the game still seemed choppy as if it was running at the lower clock speed. How do I know the overclock application is actually working?
 

lucifiel

macrumors 6502a
Nov 7, 2009
982
2
In your basement
6.05 seems to work... when I applied the change to 2505 ghz cpu, it took and the performance monitor shows the clock speed at 2505ghz. However, when I ran Geekbench, I keep getting around score of 2400. Also, when I tried playing Mass Effect, the game still seemed choppy as if it was running at the lower clock speed. How do I know the overclock application is actually working?

i actually tend to encounter this problem too, but i think it's to do with the throttling that occurs when the system gets hot.

i think ayeying summed it up: yes you get throttled, but instead of being throttled to 1600, you get throttled to 1900 or whatever. Thus it's still not truly 2500, it's just faster...
 

ayeying

macrumors 601
Original poster
Dec 5, 2007
4,547
13
Yay Area, CA
6.05 seems to work... when I applied the change to 2505 ghz cpu, it took and the performance monitor shows the clock speed at 2505ghz. However, when I ran Geekbench, I keep getting around score of 2400. Also, when I tried playing Mass Effect, the game still seemed choppy as if it was running at the lower clock speed. How do I know the overclock application is actually working?

I just use CPU-Z to see where I'm at. The throttling is a known issue in the MacBook Air's according to Notebookcheck's review of it.

The only real benefit is the throttling speed is faster than stock. 2.6GHz = 1.95GHz throttled. 2.13GHz = 1.6GHz Throttled and so forth.
 

alphaod

macrumors Core
Feb 9, 2008
22,183
1,245
NYC
The only real benefit is the throttling speed is faster than stock. 2.6GHz = 1.95GHz throttled. 2.13GHz = 1.6GHz Throttled and so forth.

Well the only way to throttle is to drop the multiplier not the base clock.
 

lucifiel

macrumors 6502a
Nov 7, 2009
982
2
In your basement
just a quick update, it seems that GPU overclocking tends to cause my computer to crash...pushing my CPU up to 2600 doesn't do much in the way of making my computer unstable...

I am not sure what I'm doing wrong with the GPU overclocking, I have a feeling it's to do with memory speeds as well...anyone know how to help?
 

TBi

macrumors 68030
Jul 26, 2005
2,583
6
Ireland
just a quick update, it seems that GPU overclocking tends to cause my computer to crash...pushing my CPU up to 2600 doesn't do much in the way of making my computer unstable...

I am not sure what I'm doing wrong with the GPU overclocking, I have a feeling it's to do with memory speeds as well...anyone know how to help?

More than likely the card just can't handle the speeds/heat. It's not unusual. The card is only spec'd for the default speed. I know these cards run faster stock on other machines but maybe apple is buying all the cards that fail at stock?
 

ayeying

macrumors 601
Original poster
Dec 5, 2007
4,547
13
Yay Area, CA
More than likely the card just can't handle the speeds/heat. It's not unusual. The card is only spec'd for the default speed. I know these cards run faster stock on other machines but maybe apple is buying all the cards that fail at stock?

Yeah, I'm not sure what's going on here. The stock speeds for the MBA should be:

350MHz Core
800MHz Shader

but we only really get:

300MHz Core
600MHz Shader

This is a lot lower than the 13" MBP or 15" MBP or 17" MBP or any other systems with the 9400M. Their speeds are:

450MHz Core
1100MHz Shader
 

Ace134blue

macrumors 6502a
Sep 17, 2009
734
2
If heat is a issue do you think on of those cooling pads could help lower the temps a little to help with the ocing? I know when I had an nvdia based card in my old pc rig I had to use custom drivers to help better overclock the gpu with out any stability issues or having the clock speed being locked.

BTW how does SetFSB work on the MBA(or any mac with windows on it)?

I am curious about this too. I know most motherboards have Crystals and show which ICS model it is. You can OC the FSB, ram, and PCI slots. I have never actually checked a mac motherboard for one of these Crystals.
Anyone here know?:confused:
 

ayeying

macrumors 601
Original poster
Dec 5, 2007
4,547
13
Yay Area, CA
I am curious about this too. I know most motherboards have Crystals and show which ICS model it is. You can OC the FSB, ram, and PCI slots. I have never actually checked a mac motherboard for one of these Crystals.
Anyone here know?:confused:

Its an nVidia board. nTune overclocks it already, so why need to check manually for the ICS?
 

lucifiel

macrumors 6502a
Nov 7, 2009
982
2
In your basement
Yeah, I'm not sure what's going on here. The stock speeds for the MBA should be:

350MHz Core
800MHz Shader

but we only really get:

300MHz Core
600MHz Shader

This is a lot lower than the 13" MBP or 15" MBP or 17" MBP or any other systems with the 9400M. Their speeds are:

450MHz Core
1100MHz Shader

i am getting up to 350/800 when i push it (according to the nVidia monitors), but when i o/c it up to 450/1100 the computer dies...well starts to go really choppy, I have a feeling that TBi may be onto something...but surely they wouldn't' give the MBA crappy ones when the MBP are getting ones that can get to 450 and 1100...
 

ayeying

macrumors 601
Original poster
Dec 5, 2007
4,547
13
Yay Area, CA
i am getting up to 350/800 when i push it (according to the nVidia monitors), but when i o/c it up to 450/1100 the computer dies...well starts to go really choppy, I have a feeling that TBi may be onto something...but surely they wouldn't' give the MBA crappy ones when the MBP are getting ones that can get to 450 and 1100...

I haven't been able to hit 350/800 even when I'm running MW2 or Folding@home GPU with CUDA.
 

lucifiel

macrumors 6502a
Nov 7, 2009
982
2
In your basement
I haven't been able to hit 350/800 even when I'm running MW2 or Folding@home GPU with CUDA.

350/800 are my stock settings, so it hits that when i strain the system with the 3d benchmark thingy with all the nice lighting and shiny balls rotating in a system. (i forget the name).

I do also note that when I muck around with the shader/cpu speeds of my GPU, the memory speed goes from 0 to 0, and I reckon that's where my errors are occuring, that or it's just too ****** to run at its actual speeds of 450/1100...
 

ayeying

macrumors 601
Original poster
Dec 5, 2007
4,547
13
Yay Area, CA
isn't that true for all cpus that have been overclocked too far?

Not really.. no. There's only so far you can overclock with the stock cooling. If you're an idiot... well, I think Darwinism should kick in by then.

Besides, all hardware are "overclocked" items. Our 1066Mhz ram is amazingly designed for 1333Mhz, underclocked. Some ram that MBP or MB or any other computer users could be of slower design but overclocked for higher marketing price.
 

lucifiel

macrumors 6502a
Nov 7, 2009
982
2
In your basement
Not really.. no. There's only so far you can overclock with the stock cooling. If you're an idiot... well, I think Darwinism should kick in by then.

Besides, all hardware are "overclocked" items. Our 1066Mhz ram is amazingly designed for 1333Mhz, underclocked. Some ram that MBP or MB or any other computer users could be of slower design but overclocked for higher marketing price.

well that's why i put in the "too far" bit, implying that to make our lovely Air into a paperweight, one would have to try quite hard and push it 'too far.' That said, I'm not sure that it's possible to do a software overclock to damage the hardware permanently, since things just shuts down when nTunes is used inappropriately.

Oh wells, I've still got my Air running at 2580 (or something?) and I have little intention of bringing it back down, especially since I'm not always in Windows...

I'm still trying to puzzle out a way to squeeze more out of the 9400M...
 
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