GPU issues, hd 7950, weird green screen.

[Kyuubixchidori]

Hi everyone! so my issue is that, randomly, my screen will freak out, and will be a series of mostly green lines, with other colors, just flashing across the screen. so just hardcore artifacts. 

It appears to occur when 90% of YouTube videos. but just light internet browsing and boom. right now its at stock settings, but i had a massive overclock, and stable at full load, but light idling it will act up? what?

 

win 8.1 64 bit

hd 7950,

 

stock settings right now, underclock/overclock did not seem to effect the issue. overclocking at all seemed to make it occur more often, but might just be placebo. has not once happened because of heavy load

[KamiKatze]

What overclock exactly did you have? Clock speed and voltage wise?

 

@Kyuubixchidori

[Profquast]

Youtube seems to fuck with overclocked settings. I only enable my overclock profile when gaming because youtube always resets it to stock clocks and disables boost or something.

[Kyuubixchidori]

What overclock exactly did you have? Clock speed and voltage wise?

 

@Kyuubixchidori

had 1115mv 1050 core, 1575 mem. but same issue even stock speeds

[KamiKatze]

had 1115mv 1050 core, 1575 mem. but same issue even stock speeds

 

That's not much, voltage wise, there shouldn't be any fault at your GPU. Maybe try a different connector, like VGA instead, just for the purpose of testing? I actually don't know.

[Kyuubixchidori]

That's not much, voltage wise, there shouldn't be any fault at your GPU. Maybe try a different connector, like VGA instead, just for the purpose of testing? I actually don't know.

turning off hardware acceleration seems to fix the issue, but every video looks like poop, with them being blocky, even pushing 1440P/1080p to a 1600x900 monitor

[Profquast]

turning off hardware acceleration seems to fix the issue, but every video looks like poop, with them being blocky, even pushing 1440P/1080p to a 1600x900 monitor

It seems to be a driver or flash player issue, I even had rma'd my card because of artifacts and not keeping clockspeed (it would give random red pixels in games and the clockspeed would fluctuate between 500 and 880 megahertz, mostly on the lower side) but they couldn't replicate the issue. After disabling all the issues went away and I now run my card at 1120/1500 +20% power and stock voltages in games. I could probably increase the speed even more if I would increase the voltages, but it already gets 85 degrees sometimes (it gets 75 on stock speeds although it should be around 65 with my cooler, I suspect the thermal paste job might be a bit bad but I don't have proper paste to fix it)

 

edit: 1080p youtube looks normal on my 1080p monitor, but when it scales another res like 720p it looks indeed poopy. Watching the livestream archive is sometimes kinda annoying but I just learned to live with it.

[PathfinderNC]

I've also had the green screen issue when playing youtube full screen. I'm confident it's a catalyst driver issue because I've been able to back out of it (without restarting) and everything else is fine. The combination of a high overclock and using flashplayer full screen would randomly cause it. I've since backed off my overclock until catalyst gets an update to fix v14.4. My OC used to be atleast 1150/1500 and up to 1200/1555 but catalyst always crashes in game with that setting (the game itself being completely stable). 1125-1140/1500 is the highest I can have atm.

[Kyuubixchidori]

I've also had the green screen issue when playing youtube full screen. I'm confident it's a catalyst driver issue because I've been able to back out of it (without restarting) and everything else is fine. The combination of a high overclock and using flashplayer full screen would randomly cause it. I've since backed off my overclock until catalyst gets an update to fix v14.4. My OC used to be atleast 1150/1500 and up to 1200/1555 but catalyst always crashes in game with that setting (the game itself being completely stable). 1125-1140/1500 is the highest I can have atm.

 

really? I haven't been able to find anyone else who had this issue. it happens with nearly every video, turns out with hardware decoding off, now it looks fine. i don't know what different now but its not a big deal. right now im running stable with 1200/1575. but i have my voltage kicked up to 1.2.  gets up to 80 degrees on 100% load at 45% fan speed. which is not bad at all. kind of mad I have to put the voltage up that high, but its not a huge deal.

 

 

but it already gets 85 degrees sometimes (it gets 75 on stock speeds although it should be around 65 with my cooler, I suspect the thermal paste job might be a bit bad but I don't have proper paste to fix it)

 

ouch. my 7950 gets 80-82 degrees with 45% fan speed at 1.2 volts. 

[PathfinderNC]

really? I haven't been able to find anyone else who had this issue. it happens with nearly every video, turns out with hardware decoding off, now it looks fine. i don't know what different now but its not a big deal. right now im running stable with 1200/1575. but i have my voltage kicked up to 1.2.  gets up to 80 degrees on 100% load at 45% fan speed. which is not bad at all. kind of mad I have to put the voltage up that high, but its not a huge deal.

 

I haven't had to turn off hardware decoding yet. I guess doing that or dropping an OC both help.

 

hmm. my 270 runs 1.2v stock when in high gear. Is the 7950 the one that's basically the same as the R9 270 (chipwise) or do I have that mixed up?

 

I guess the DirectCUII cooler works quite well compared to those temps. I use a user set fan profile but it's only slightly more aggresive than the stock curve. It normally doesn't pass 65c under gaming load & 75c under synthetic tests. I know it's supposed to be safe up to about 85c momentarily but anything past 70c and I start "paying attention" (getting nervous).

 

I know one other guy who was gonna tryout catalyst 14.6 beta then downgrade to 14.2 to see what helps. If he/I find anything, I'll echo it back here.

[Kyuubixchidori]

I haven't had to turn off hardware decoding yet. I guess doing that or dropping an OC both help.

 

hmm. my 270 runs 1.2v stock when in high gear. Is the 7950 the one that's basically the same as the R9 270 (chipwise) or do I have that mixed up?

 

I guess the DirectCUII cooler works quite well compared to those temps. I use a user set fan profile but it's only slightly more aggresive than the stock curve. It normally doesn't pass 65c under gaming load & 75c under synthetic tests. I know it's supposed to be safe up to about 85c momentarily but anything past 70c and I start "paying attention" (getting nervous).

 

I know one other guy who was gonna tryout catalyst 14.6 beta then downgrade to 14.2 to see what helps. If he/I find anything, I'll echo it back here.

even stock speeds i was getting the issue, which reinforces its a driver issue. I believe its a r9 280(chipwise), but I'm not quite sure, I know theres barely a diffrence between my 7950 and my friends 7870 before my overclock. I need to test the gaming load because the synthetic was 80ish. What bothers me is besides the new cards running at 95*C or whatever, there's no official what a safe temperature is that i can find. 

 

my triple slot asus cooler is amazing. its weird to me because my hd 7770 had a much smaller cooler, so the temps would change almost instantly. this thing is so gradual. 

 

do you run with the +20% power? I know it lets the card pull more power, do you only need that for huge voltage bumps?

[PathfinderNC]

Yes I have the power target at +20%. I'm note sure exactly what it changes, but from research I know people say to put it there when doing medium to high overclocking to help with stability. The voltage control is locked to stock though unfortunately, and I'm not sure of any ways to unlock it without flashing the bios (which I haven't done before).

[Profquast]

I believe the power slider was because the card is limited to a certain wattage for thermal reasons, and if you overclock the resistance increases so the wattage increases with it and with the limit imposed it can't maintain the clockspeeds.