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Old 06-14-2017, 02:55 PM   #1
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Unhappy OC GPU Voltage - Screen Flickering?

So I've downloaded Sapphire TRIXX (which seems very apt as I have 2 x Sapphire 270Xs in Crossfire) to be able to adjust the GPU voltage.

MSI Afterburner doesn't work.

I can overclock my GPUs from 1070/1400 to 1120/1500 without changing anything.. however, every once in a while I get a crash and feel I just need to bump the GPU voltage slightly.

STRANGELY though... looking in TRIXX.. it says the voltage of my 1st GPU is 1.188 and for the SECOND GPU it's 1.238? Why is this?

When I try and bump up the 1st GPU from 1.188 my screen starts flickering... then I have to restart and when I do restart.. the computer will BSOD and then settings will go back to normal.

I have disabled ULPS also.

Any advice on what's happening? Why the VDDCs are different.. how I can overclock safely?
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Old 06-14-2017, 03:00 PM   #2
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Default Re: OC GPU Voltage - Screen Flickering?

How are you overclocking? Are you doing slight bumps Avery time, or do you jump to high frequencies directly?

Also, are the GPUs the same exact model?
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Old 06-14-2017, 03:09 PM   #3
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Default Re: OC GPU Voltage - Screen Flickering?

You know what.. this whole time I thought they were both the exact same.. But I've just checked the boxes.

One of them is an 'Overclock Edition' - the other is not.

What are my options?

Also, what kind of bumps would you recommend? Would you recommend 5mv and then restarting each time?
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Old 06-14-2017, 03:14 PM   #4
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Default Re: OC GPU Voltage - Screen Flickering?

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Originally Posted by datkins91 View Post
You know what.. this whole time I thought they were both the exact same.. But I've just checked the boxes.

One of them is an 'Overclock Edition' - the other is not.

What are my options?

Also, what kind of bumps would you recommend? Would you recommend 5mv and then restarting each time?
I would say you take them to the same voltage first. Them start doing small bumps. Proper overclocking takes hours.

What PSU do you own?
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Old 06-14-2017, 03:30 PM   #5
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Default Re: OC GPU Voltage - Screen Flickering?

I own a Corsair 1000w Platinum rated :P

I tried bumping the 1st GPU to the same as the other, that was the first thing I did.. immediate flickering.

Also, should I have 'Synchronise cards in multi-GPU config' enabled?

Or should I bring the Overclocked one down to 1.188?
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Old 06-14-2017, 03:36 PM   #6
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Default Re: OC GPU Voltage - Screen Flickering?

Yes, enable it. That should equalize the settings.

I was thinking you dropped down the OC card voltage.
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Old 06-14-2017, 03:38 PM   #7
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Default Re: OC GPU Voltage - Screen Flickering?

I'll try bringing the higher one down to the original and work upwards.

Any other suggestions about the flickering at all?

Will try the overclocking tomorrow now.
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Old 06-14-2017, 03:40 PM   #8
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Default Re: OC GPU Voltage - Screen Flickering?

I'd say too much voltage. Maybe drivers, but I don't think so. Try tiny increases starting from the lowest card. Keep them at the same values. Take your time. You can't rush this.
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Old 06-14-2017, 03:43 PM   #9
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Default Re: OC GPU Voltage - Screen Flickering?

Okay will do.

I'll reduce the 2nd card to 1.188, restart my computer.. then increase both cards by.. 3-5mv each time exactly the same, and restart.

I'll let you know tomorrow how it goes.

(If anything else comes to mind do let me know)
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Old 06-14-2017, 03:49 PM   #10
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Default Re: OC GPU Voltage - Screen Flickering?

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Okay will do.

I'll reduce the 2nd card to 1.188, restart my computer.. then increase both cards by.. 3-5mv each time exactly the same, and restart.

I'll let you know tomorrow how it goes.

(If anything else comes to mind do let me know)
Doesn't the synchronize option stabilize the settings?

By the way, have you tried Wattman?
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Old 06-15-2017, 04:45 AM   #11
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Default Re: OC GPU Voltage - Screen Flickering?

Radeon Wattman only works with higher end series AMD cards, doesn't it? That's what I read on their website.

However, if that is the case, I do find it strange when my computer DOES crash because of GPU related overclocking, a message will pop up saying 'Radeon Wattman settings have been reset' .. or something to that effect?

GPU synchronisation has always been on when I've tried the overclocking.

I'll be trying at some point today to do what I'd suggested and see how I go!
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Old 06-15-2017, 05:52 AM   #12
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Default Re: OC GPU Voltage - Screen Flickering?

I'm not familiar with the software you're using, I swear by Afterburner for stable, reliable overclocking.

When you say voltage control isn't working, have you enabled voltage control in settings? :P

I've never heard of that being an issue with MSI AB.


I'm also staggered by your clockspeeds there, I've three different R9 270Xs (Sapphire, MSI and XFX) and they all we unstable above 1275MHz on the core.
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Old 06-15-2017, 06:29 AM   #13
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Default Re: OC GPU Voltage - Screen Flickering?

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I'm not familiar with the software you're using, I swear by Afterburner for stable, reliable overclocking.

When you say voltage control isn't working, have you enabled voltage control in settings? :P

I've never heard of that being an issue with MSI AB.


I'm also staggered by your clockspeeds there, I've three different R9 270Xs (Sapphire, MSI and XFX) and they all we unstable above 1275MHz on the core.
I had enabled it yes!

My core is at 1120 though? Unless I'm being silly and missing what you mean!

Also, do you use afterburner for the 270Xs? In which case, if I've enable the voltage control, why else can't I use it?
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Old 06-15-2017, 09:16 AM   #14
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Default Re: OC GPU Voltage - Screen Flickering?

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I had enabled it yes!

My core is at 1120 though? Unless I'm being silly and missing what you mean!

Also, do you use afterburner for the 270Xs? In which case, if I've enable the voltage control, why else can't I use it?
Ohhhh I know who you are now. I didn't realize earlier. Didn't you have a pair of 290Xs?
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Old 06-15-2017, 09:28 AM   #15
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Default Re: OC GPU Voltage - Screen Flickering?

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I had enabled it yes!

My core is at 1120 though? Unless I'm being silly and missing what you mean!

Also, do you use afterburner for the 270Xs? In which case, if I've enable the voltage control, why else can't I use it?
Sorry I had Nvidia on my mind there, I thought you meant 1120/1500 as a base/boost clock but then i realised you're talking memory

If you've unlocked voltage control on Afterburner it's really weird it doesn't let you move the voltage slider.

You could try using Asus GPU Tweak II, that also has voltage control - don't worry I don't think you actually need Asus GPUs to use their software, it works with any card that ASUS make a variant of (i think!). worth a try though?

Might also be worth screenshotting what you're seeing on the afterburner window and on the first settings page so I can see what options you're running with
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Old 06-15-2017, 09:46 AM   #16
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Default Re: OC GPU Voltage - Screen Flickering?

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Sorry I had Nvidia on my mind there, I thought you meant 1120/1500 as a base/boost clock but then i realised you're talking memory

If you've unlocked voltage control on Afterburner it's really weird it doesn't let you move the voltage slider.

You could try using Asus GPU Tweak II, that also has voltage control - don't worry I don't think you actually need Asus GPUs to use their software, it works with any card that ASUS make a variant of (i think!). worth a try though?

Might also be worth screenshotting what you're seeing on the afterburner window and on the first settings page so I can see what options you're running with
Now attached! I've also tried it with every other option other than 'Standard MSI'
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File Type: jpg Capture.JPG (73.5 KB, 4 views)
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Old 06-15-2017, 10:21 AM   #17
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Default Re: OC GPU Voltage - Screen Flickering?

Not even sure what the 'modes' do to be honest, I've always just used standard MSI for all the years ive used the app.

Have you tried removing all video drivers and reinstalling whatever the latest crimson driver is from AMD?
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Old 06-15-2017, 10:30 AM   #18
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Default Re: OC GPU Voltage - Screen Flickering?



Try that and tell us how it goes. You are not overclocking right so trying to troubleshoot that is pointless.
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Old 06-15-2017, 11:57 AM   #19
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Default Re: OC GPU Voltage - Screen Flickering?

Well, true - but the inability to access voltage control (especially on AMD cards) is a big issue that needs addressing before you try and dial in max stable OC :P

also, big up Jayztwocents.
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Old 06-17-2017, 10:06 AM   #20
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Default Re: OC GPU Voltage - Screen Flickering?

Hey guys..


So I watched the video and it is useful. However, I can't seem to get access to the voltage control on MSI AB or Sapphire TRIXX... so is it locked in some way?

HOWEVER.. I AM able to get the control using the oldest version of Trixx (which is referenced by my original post)

As you can see attached going on the website there are 3 versions for download.. and it's the V4.9.1 that allows it... but the others do not???

Any ideas why this is?
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File Type: jpg Capture.JPG (75.1 KB, 5 views)
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