Core Voltage wont OC on N680GTX Lightning!

Hi everybody!
I recently bought a brand new gaming PC, after years and years of being a notebook gamer.. So, i finally decided to play around with the overclock settings for my GPU
I have the Z77 MPOWER Motherboard, and as for my GPU, I have the N680GTX Lightning. My system is running windows 7 x64. I use MSI Afterburner 2.3.1 for applying the overclocking, and Furmark for testing (instead of Kombuster)
I'm all new to overclocking, so i started reading about it, and came across this review of the GPU:
-Link here, but this damn forum says: "Sorry, you are not allowed to post external links." darn..
And they clearly figured out some nice overclocking settings for the GPU. Allthough, I didn't know if I should just change the settings to those levels right away, so i kept looking and found another post:
-Link here, but this damn forum says: "Sorry, you are not allowed to post external links." darn..
So i started to slowly apply the overclocking to my Core Clock, and everything was well. I was able to get it to +70/80 before the drivers started to crash. Then i went ahead to start applying the Core Voltage overclocking (slowly increasing the Voltage a little bit at a time), i realized, that when i increase the Core Voltage (to ex. +12 or +25), nothing happens to "GPU voltage, V" in the monitor screen in Afterburner. It just stays at 1175'ish. When i increase the value and press "Apply", it drops to 1100 for like 1/4 of a second, and then goes up to 1175 again. And no matter how much i increase the Core Voltage, it just wont go higher than 1175. When i apply the overclock, GPU-Z also says that the "GPU Clock boost" still is at 1176 (Just like the Default Clock, so nothing has changed). Now, I did increase the Power Limit from 100 to 133%, and i checked "Unlock voltage control", "Unlock voltage monitoring" and "Force constant voltage"(allthough i don't really know what "Force constant voltage" does, but i have the same problem with applying the voltage overclock whether i have it checked or not). I also set the UAC settings to "disabled"(Never notify), as i did read somewhere that that could be the problem. Didn't help me though..
Is anybody else experiencing the same problem? Or does anyone have any idea of what i do wrong? Hope somebody can help me!
(this is my first post in here.. And sorry for any bad English language )

Quote from: svendsen1 on 31-January-13, 22:36:40
Hi everybody!
I recently bought a brand new gaming PC, after years and years of being a notebook gamer.. So, i finally decided to play around with the overclock settings for my GPU
I have the Z77 MPOWER Motherboard, and as for my GPU, I have the N680GTX Lightning. My system is running windows 7 x64. I use MSI Afterburner 2.3.1 for applying the overclocking, and Furmark for testing (instead of Kombuster)
I'm all new to overclocking, so i started reading about it, and came across this review of the GPU:
-Link here, but this damn forum says: "Sorry, you are not allowed to post external links." darn..
And they clearly figured out some nice overclocking settings for the GPU. Allthough, I didn't know if I should just change the settings to those levels right away, so i kept looking and found another post:
-Link here, but this damn forum says: "Sorry, you are not allowed to post external links." darn..
So i started to slowly apply the overclocking to my Core Clock, and everything was well. I was able to get it to +70/80 before the drivers started to crash. Then i went ahead to start applying the Core Voltage overclocking (slowly increasing the Voltage a little bit at a time), i realized, that when i increase the Core Voltage (to ex. +12 or +25), nothing happens to "GPU voltage, V" in the monitor screen in Afterburner. It just stays at 1175'ish. When i increase the value and press "Apply", it drops to 1100 for like 1/4 of a second, and then goes up to 1175 again. And no matter how much i increase the Core Voltage, it just wont go higher than 1175. When i apply the overclock, GPU-Z also says that the "GPU Clock boost" still is at 1176 (Just like the Default Clock, so nothing has changed). Now, I did increase the Power Limit from 100 to 133%, and i checked "Unlock voltage control", "Unlock voltage monitoring" and "Force constant voltage"(allthough i don't really know what "Force constant voltage" does, but i have the same problem with applying the voltage overclock whether i have it checked or not). I also set the UAC settings to "disabled"(Never notify), as i did read somewhere that that could be the problem. Didn't help me though..
Is anybody else experiencing the same problem? Or does anyone have any idea of what i do wrong? Hope somebody can help me!
(this is my first post in here.. And sorry for any bad English language )
Hi, the easy answer is you need to use older 2.2.3 AB version as Nvidia forced MSI AB to lock out voltage tweaks .
Now onto voltage monitoring, even if you use older AB the voltage will not show correctly in GPU-Z or AB, it will show 1.175 approx , but that is not including the offset added voltage because the PE/lightening models add voltage on top of reference regulator .
SO just add offset to GPU-Z and should be close to right voltage .

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MOVED: Core Voltage wont OC on N680GTX Lightning!

This topic has been moved to Overclocking, Undervolting.
https://forum-en.msi.com/index.php?topic=165956.0

This topic has been moved to Overclocking, Undervolting.
https://forum-en.msi.com/index.php?topic=165956.0

MSI Afterburner Core Voltage = huh?

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Quote from: Henry on 27-September-11, 06:34:22
The only reasons you would need to increase the voltage would be: 1 - if you are going to OC more than what it came with and it would need higher voltage for it to run stable. 2 - if you are experiencing problems that would require a higher voltage for it to run stable. If all is OK as is then leave it alone.
Hey Henry,
Sorry I didn't specify. I came from overclocking ASUS GTX 570 and increasing the voltage quite a bit. But I was using ASUS SmartDoctor that showed the actual voltage.
Since MSI Afterburner only has a +1 through plus +200 on the core voltage modifier, I didn't quite understand what that was.
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I went up to 1.6V, and what I actually get is 1.52.....
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Quote from: Svet on 03-May-13, 01:18:22
Yes, unfortunately im sure
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multiple times with different cases. But nothing works.
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Starting with the Forceware 100.xx drivers, the SLI capability in case of graphic cards with different amount of VRAM has been removed.
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Quote
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Core Voltage wont OC on N680GTX Lightning!

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