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Changing core voltage of GPU through MSI Afterburner

Last response: in Overclocking
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April 24, 2014 2:57:44 AM

I want to overclock my MSI r9 280X and so I need to increase my core voltage but I'm not sure to what extent I should do it since the units for core voltage are a bit confusing.
I followed reliable OC guides online and I want to increase core voltage to 1200mv but the units aren't shown in mvs in Afterburner. Its just at 0 and I can change it to +10, +50 to +100, etc. Refer to this screenshot of my MSI afterburner- http://imageshack.com/a/img843/4253/rpx1.png .So how do I know what value represents 1200mv?
a c 91 K Overclocking
a c 204 U Graphics card
April 24, 2014 3:00:45 AM

I don't tend to change the core voltage when I OC my GPU, I just leave it at the standard it came as, works the same. Unless you really want to do extreme OC, I suggest you change the voltage, which 1200Mhz is high, but not extreme. You'll be fine leaving at at 0.
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a b K Overclocking
a b U Graphics card
April 24, 2014 3:04:08 AM

default is 1.175v and you're adding to this number. boost voltage is already 1.2v default so i think the card overclocks automatically if it has the tdp/temperature headroom
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April 24, 2014 3:05:51 AM

unknownofprob said:
I don't tend to change the core voltage when I OC my GPU, I just leave it at the standard it came as, works the same. Unless you really want to do extreme OC, I suggest you change the voltage, which 1200Mhz is high, but not extreme. You'll be fine leaving at at 0.


Alright, fair enough. But will the rest of my increased values like core clock, memory clock be effective in improving performance without increasing core clock? I didn't know increasing core voltage was extreme since I thought you always had to do it for ANY overclock
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a c 91 K Overclocking
a c 204 U Graphics card
April 24, 2014 3:09:53 AM

It won't be effected unless you go to high-extreme OC, The software will generally increase the voltage automatically to prevent catastrophic voltages being applied, the software will not apply such high voltages if it is not necessary.
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April 24, 2014 3:14:08 AM

laviniuc said:
default is 1.175v and you're adding to this number. boost voltage is already 1.2v default so i think the card overclocks automatically if it has the tdp/temperature headroom


Yep, it seems you're absolutely right., I left core voltage at default and I ran MSI Kombustor with all other OC settings (like core and memory clock increases) applied and the core voltage reads 1.200V so you're right, the card does overclock automatically. Thanks again.
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April 24, 2014 3:16:07 AM

unknownofprob said:
It won't be effected unless you go to high-extreme OC, The software will generally increase the voltage automatically to prevent catastrophic voltages being applied, the software will not apply such high voltages if it is not necessary.


Alright, so I'll leave it unchanged from Afterburner. Thanks :) 
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April 24, 2014 11:29:57 PM

I have an R9 280x as well, and it's odd that yours is 1.175v stock. Mine is actually 1.075v stock, I actually had to bump it to 1.125v for stock settings. I did purchase the card used admittedly, so it's possible the previous owner flashed down the voltage to conserve power.

Anyway, here is what I did for a gaming-only overclock (YMMV)

Core Voltage 1250
Power Limit 20%
Core Clock 1140
Leave Memory voltage/clock alone, minimal gains to be had there.
Fan Speed 100% Manual

For a maxed out overclock given the hardware, same as above except:

Core Voltage 1300
Core Clock 1170

Not sure if you have a standard model with a 1000 core clock or one of the overclocked models, but this overclock is for a standard model R9 280x (PowerColor).

It's worth a shot!
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April 24, 2014 11:33:20 PM

themyst said:
I have an R9 280x as well, and it's odd that yours is 1.175v stock. Mine is actually 1.075v stock, I actually had to bump it to 1.125v for stock settings. I did purchase the card used admittedly, so it's possible the previous owner flashed down the voltage to conserve power.

Anyway, here is what I did for a gaming-only overclock (YMMV)

Core Voltage 1250
Power Limit 20%
Core Clock 1140
Leave Memory voltage/clock alone, minimal gains to be had there.
Fan Speed 100% Manual

For a maxed out overclock given the hardware, same as above except:

Core Voltage 1300
Core Clock 1170

Not sure if you have a standard model with a 1000 core clock or one of the overclocked models, but this overclock is for a standard model R9 280x (PowerColor).

It's worth a shot!

It's probably because my one is the MSI r9 280X and I managed to find out that it comes with stock 1.175V.
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