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Random line flashes across screen periodically on R9 390

post #1 of 3
Thread Starter 
Hey all,

So I'm having this small problem. every once in a while (30 minutes to an hour) I get a horizontal line flash through my screen. It's not terrible but it's kind of annoying when you're watching a movie and an hour in this line flashes across for a split second. It kind of takes your focus off what you're enjoying. I've a Sapphire (new) R9 390, on a Asus 990FX Sabertooth R 2.0 motherboard.

The line will randomly flash across the screen on either monitor I have hooked up (I've one to a projector via HDMI and one to a monitor via DVI. I can't seem to isolate what could be causing it.

I've run Memtest and it comes back as fine, I can run benchmarking programs and I won't see a thing under load, and I've checked MSI afterburner monitoring for any spikes in clock speed on my GPU right after I see it - but nothing appears to be out of sorts. I'm overclocked on my 8320 and the 390, but I've run them both normally and I'll still get the line flash across my screen every once in a while. I've double checked the refresh rate is set properly on both screens (they are) - and I've done clean uninstalls and installs of the drivers.

Anyone have any idea? ... The motherboard IS missing the little lock switch to the PCI lane, but I've re-seated it and made sure it's properly secured multiple times, so I don't THINK that's the problem...

Thanks for your input!
post #2 of 3
We got this problem on 3 screen setup since last april, its the memory clock that is too low at 150mhz , if your one screen is high enough in resolution I bet its the same thing that happend to you..

How to workaround:

Use msi Afterburn go into the setting of afterburn and at the bottom in Unofficial Overclock mode select "Without PowerPlay Support"

This will allow the card to STAY at the mhz you input in core and mem all the time, if you "reset" or dont touch the clock it will work like usual and drop to 300 mhz core and 150 mhz mem but if you boost your 3d clock for gaming it will stay where you set it so remember to lower them after some gaming.

Then you have to boost your MEM clock to the lowest possible its 625 in my case and apply, this will remove the flickering BUT you lose your low power state your core will still be 300 but voltage will go up to a 3D voltage and the card will waste more watt.

In HWinfo64 in low powerstate the CPU core watt said 9 Watt and the mem 1.2 watt and by removing the low power state you have core 36 Watt and mem 13 W , lowering the voltage to -100 lower the core watt to 25W

AMD are award of that since april but are doing nothing to fix it... the only solution I can think of is flashing the card with a Higher memory clock in low power state but I dont even know if you can do that ppl boost the 3d clock that way but I seen no one touch the lowest 150 mhz clock.
I7 6700K
(15 items)
 
  
CPUMotherboardGraphicsRAM
I7 6700k Gigabyte Z170x-UD5 Rx Vega 64 G.Skill Ripjaws F4-3200C16-16GVK 
Hard DriveHard DriveCoolingOS
Samsung 256 830 serie Samsung 500 850 serie M-2 Custom Water Loop , 2 GPU block , 1 CPU block, ... Win7 64 / Win 10 64 
MonitorKeyboardPowerCase
3X LG 24 inch (2ms) Logitech G810 XFX 1250W  Bitfenix Shinobi XL modded 
MouseMouse PadAudio
Logitech G502 Logitech Hard Pad ( G440) Xonar dx to a 5.1 system 
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I7 6700K
(15 items)
 
  
CPUMotherboardGraphicsRAM
I7 6700k Gigabyte Z170x-UD5 Rx Vega 64 G.Skill Ripjaws F4-3200C16-16GVK 
Hard DriveHard DriveCoolingOS
Samsung 256 830 serie Samsung 500 850 serie M-2 Custom Water Loop , 2 GPU block , 1 CPU block, ... Win7 64 / Win 10 64 
MonitorKeyboardPowerCase
3X LG 24 inch (2ms) Logitech G810 XFX 1250W  Bitfenix Shinobi XL modded 
MouseMouse PadAudio
Logitech G502 Logitech Hard Pad ( G440) Xonar dx to a 5.1 system 
  hide details  
Reply
post #3 of 3
Thread Starter 
Hey thanks for the advice!.. I had read that a couple people were having this problem in multiple monitor configs - but was trying to rule everything else out. I'm not going to go through all that at the moment unless it becomes really bad. Hopefully AMD will fix the problem. I'll file a ticket with them anyways just to add another voice to the list.
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