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6750m extreme overclocking guide

This may be a dumb question, but if I overclock the ATI 6750m in Windows, will it still be overclocked when I use OSX Mountain Lion.
 
Mattgfx said:
How much lower are your temperatures if you over clock compared to normal clock rate?
Click to expand...

Well it will only drop if you lower the voltage applied across the GPU. I run mine at .955v with 775 core and 975 memory and have never seen the GPU temps run over 90 degrees C. I am now experimenting with undervolting to see how low the voltage can go for the stock speeds.

Wonder how the 6750m overclocked will handle BF4??
 
Why is there no software available in OS X to underclock/overclock ANY of the video cards? I've got a 2011 MBP with an AMD 6750M that recently FRIED on me from normal use in OS X. I attribute the failure to the GPU. I would LOVE to underclock it if possible.
 
shardey said:
I am now experimenting with undervolting to see how low the voltage can go for the stock speeds.
Click to expand...

Interested to hear how that goes.

On a side note, for those wanting to underclock/undervolt on OSX, it might be possible to do this via the SMC. It's rather an obscure hack, which is probably why it hasn't been done yet.

First prize for me now, is to figure out how to disable the dedicated graphics card completely (it drains battery life insanely). GfxCardStatus doesn't work for this goal.
 
canhaz said:
Interested to hear how that goes.

On a side note, for those wanting to underclock/undervolt on OSX, it might be possible to do this via the SMC. It's rather an obscure hack, which is probably why it hasn't been done yet.

First prize for me now, is to figure out how to disable the dedicated graphics card completely (it drains battery life insanely). GfxCardStatus doesn't work for this goal.
Click to expand...

Well I ended up trading my MBP for a very nice Maingear rig. I did manage to use .955V stable with an OC so there is potential for lower voltage, just may not be that much lower.
 
Hello everyone.
Necris, i really thank you for such brilliant guide!

Just for information, i increased clocks to 820/1000 with 0.955 voltage and everything looks stable. Played a couple hours BF3 without any problems. Average GPU temperature was around 77 C. Also, used 850/1050 and it looked good, but decided to underclock my overclocking a bit :D

Is there any chance of shortage voltage for such clocks, or if it plays well nothing to worry about?

Oh and another one question... What voltage to use with 150/100 clocks? They are the default ones ATT uses. And it is enough for me to serf web or doing other work stuff. Currently i'm using 0.855

UPDATED:

Oh and yeah, i find out, that ATT work absolutely great without Catalyst! I use only bootcamp. All you need is to put atipdlxx.dll to your ATT root folder, which you can take from previous versions of Catalyst. Or you can download the attached one. Have fun!
 

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JEYCDEE said:
Hello everyone.
Necris, i really thank you for such brilliant guide!

Just for information, i increased clocks to 820/1000 with 0.955 voltage and everything looks stable. Played a couple hours BF3 without any problems. Average GPU temperature was around 77 C. Also, used 850/1050 and it looked good, but decided to underclock my overclocking a bit :D

Is there any chance of shortage voltage for such clocks, or if it plays well nothing to worry about?

Oh and another one question... What voltage to use with 150/100 clocks? They are the default ones ATT uses. And it is enough for me to serf web or doing other work stuff. Currently i'm using 0.855

UPDATED:

Oh and yeah, i find out, that ATT work absolutely great without Catalyst! I use only bootcamp. All you need is to put atipdlxx.dll to your ATT root folder, which you can take from previous versions of Catalyst. Or you can download the attached one. Have fun!
Click to expand...

Are you using Windows 7? In Windows 8 and the latest drivers using this dll file results in continuous graphical glitches :-(
 
Overclocking my iMac12,1 (i5-2.5GHz-QC/16GB-RAM/6750M*512MBGDDR5*/Win7Ult64bit) HELP?

Thank you for taking the time to read my reply to this thread...

I recently started using my iMac for gaming since the laser in my XBOX360 burnt out and too broke to replace the laser right now.

Moving on... Following all these instruction - basically I wanted to try lowering the voltage as this thread suggest for the better performance. So I installed everything suggested; Latest Catalyst (14.4) and ATI Tray Tools by Ray Adams ver. 1.0.

-Opened up the Overclocking menu within ATI Tray Tools and the area I am confused about is the Voltage area. When I first open the menu it shows "0.00", and even clicking on the drop down next to it shows nothing.

There is a button next to the Voltage Drop Down menu that has ... and when I Click on that it opens up a menu named "Custom VDDC" which the list is blank. So I tried adding the voltage 0.995 (But your not able to enter in anything but numbers) - So I entered in 995 and clicked save.
This is now an option in the Drop Down menu but it reads
"0.995 Unsafe!"
------------------------
This is where I am stuck, if I select that, does that mean I changed the voltage to "0.995"?? I tried looking up the stats in GPU-Z to confirm but it doesn't show voltage. Even trying to pull up stats using Catalyst it doesn't show voltage.

So I figured I would try the MSI Afterburner program, and trying to use that program doesn't allow me to change much at all. Half the slider buttons are not lit meaning I cannot change them and the Core Speed and Memory Speed do not go high at all, so I figured I'd just go back to the ATI Tray.

I have looked for video's on youtube of people using ATI Tray hoping to see how they raise and lower voltage but for some reason I Wasn't abel to find one, or one that's using the same version as mine where the options are the same.

Anyone give any suggestions????

I am using BootCamp/Windows 7 for gaming only, so I was looking for a Windows 7 Build setup for gaming so all the extra BS was turned off and all resources are free for gaming only but I only came across XP builds. SO this is my next step - overclocking gpu to get a little better performance.

I am mainly looking to do this for the higher end games such as "Alien Isolation" since it's min Requirements say a 1GB GPU Video card and mine only has 512mb. The rest of my specs are great - i5 Quad Core, 16GB of Ram - So Any Suggestions??

Thanks again for your time and patients, I loved this tut but pictures posted with this are no longer available so I couldn't even verify against those.
 
Macbook pro ealy 2011 overclock

After several runs finding out what the gpu could run at as its max parameters. The top clock speed I could get it running at without the card crashing was 850 clock speed and also 1100 MHz memory speed. However this required me to up the voltage to 1.050v and while gaming (on my lap :p ) it does regularly average between 80-90 degrees. however when benchmarking the I pucked up a extra 5000 score with the standard clock at 11000 but boosted to 16000 with the overclock more than tripling the fps I get in certain games or keeping some games i run at ultra on a lock of 60 fps (fps limited)
 
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