Voltage adjust on 270x for OC and general OC help.

t99 · Nov 16, 2016

I have a r9 270x that will be upgraded very soon and want to start experimenting with more advanced overclocking. The model is r9 270x msi gaming mini itx. the core clock is 1030 with a 1080oc boost. I've always ran it at 1090 from day 1 w/ no issues at all. I recently had it running stable at 1180 +-10mhz (don't remember exactly when it forced a restart). I was under the impression if I up the voltage then it could allow me to get it stable at a higher clock speed.

Curious as to what increments I should move the voltage up to? How far is to far? I want to experiment a bit, but I don't want to fry it. Really interested to get a before and after of a couple of benchmarks / games. The core clock seems to give me a lot more room for error than the memory. It's been a while since playing with the memory because I found it unstable. I want to say I could only move it up by 70 or so. I just leave it at the default of 1400.

weberdarren97 · Nov 17, 2016

What increments should you increase by? I would suggest moving up by .002 volts at a time.

How far is too far? I don't suggest going more than .05V higher than default.

Do note that increasing voltage will increase heat output. Please do keep the core under 90C.

IMO, the memory on these R9 2xx cards is already fast enough and overclocking it isn't nearly as beneficial as overclocking the core.

t99 · Nov 17, 2016

weberdarren97 :

Thanks, about to give it a shot. The heat is amazing on this thing for a 1 fan card. Highest it's been was mid 70s during the most extreme benchmarks, typically mid 62-67 when gaming.

One other thing... When adjusting the clock speed it seems really safe. I adjust it, run a game / benchmark and it either works or cpu freezes / restarts at which point everything is fine again. Can adjusting the voltage even within a "safe" amount still possibly cause a bigger problem than a typical restart?

weberdarren97 · Nov 17, 2016

t99 :

Clock speed adjustments will restart without issue because it doesn't apply that clock until you put a high enough load on it that it needs to boost up to high performance mode, sometimes referred to 3D mode because it is triggered when running a game or other application that's using Direct3D or other 3D Graphics API's. So until you load it up, it will likely hang out around 200-500MHz depending on the specific aftermarket model and the BIOS it's equipped with.

As for voltage, there is a little more danger. You see, it will not reach your set target voltage until it enters high performance mode. However, it will increase rest mode voltage by however many milivolts you are above stock voltage. Let's say you've raised voltage by .003V. Even though its idle voltage will be much lower than the voltage it applies while in high performance mode, it will still be .003V higher than its default idle voltage. This is why I don't recommend going more .05V higher than default, so that you don't strain the MOSFETs while in idle. They need that period in between periods of being in high performance mode so that they can rest and be ready for the next gaming session.

t99 · Nov 18, 2016

weberdarren97 :

t99 :

Clock speed adjustments will restart without issue because it doesn't apply that clock until you put a high enough load on it that it needs to boost up to high performance mode, sometimes referred to 3D mode because it is triggered when running a game or other application that's using Direct3D or other 3D Graphics API's. So until you load it up, it will likely hang out around 200-500MHz depending on the specific aftermarket model and the BIOS it's equipped with.

As for voltage, there is a little more danger. You see, it will not reach your set target voltage until it enters high performance mode. However, it will increase rest mode voltage by however many milivolts you are above stock voltage. Let's say you've raised voltage by .003V. Even though its idle voltage will be much lower than the voltage it applies while in high performance mode, it will still be .003V higher than its default idle voltage. This is why I don't recommend going more .05V higher than default, so that you don't strain the MOSFETs while in idle. They need that period in between periods of being in high performance mode so that they can rest and be ready for the next gaming session.

Couldn't you just move the voltage back when not gaming so the idle voltage is not higher or would it cause some kind of issue by constantly moving the voltage back and forth?

weberdarren97 · Nov 18, 2016

t99 :

weberdarren97 :

Couldn't you just move the voltage back when not gaming so the idle voltage is not higher or would it cause some kind of issue by constantly moving the voltage back and forth?

Technically you could, but I try not to make more changes than what's necessary. The more changes you make and the more often you make said changes, the greater the chance of confusing the display drivers.

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Voltage adjust on 270x for OC and general OC help.

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