hey im trying to oc my gpu r9 270 sapphire and ive oc the gpu to 985 and yes i was doing by increments and at that clock the graphics driver crashed and after that i lowered the clock down to 980 and then ran the stress test again to see if its fine still and while i was running the test the numbers on the stress test were flickering and im not sure if its ok or not?
If the driver crashed you will have to reset the computer first before retesting.
so i every time the driver crashes and restartes i need to reset? also do you know what the avg oc for the r9 270 is?
Yes....the r9 270 is a hd 7870 1100Mhz on the core is not uncommon there are HD7870 Ghz editions with a 1000mhz factory clock
if you have flickering with overclocking there is two things you can do. And here is a few things you should know if you don't know them already.
First raise the power-limit to around 120-ish. i personally start very high with this since it really doesn't do anything but provide the necessary power to your graphics card.
Core-Clocks
You've already mentioned pushing it, in increments. that's right. keep going on to you see "Artifacting" or (the weird abnormal pixels on your monitor) you can test this with a few benchmark tests like "Valley Benchmark" or "MSI Afterburner" softwares. once you start to see that "Artifcating" it's not stable and you need to push the card a bit back to get it in a stable range. so if you have 985 on the core clock and you see it's NOT stable try pushing it back in Increments of 5 until it goes away.
Memory Clocks
When you push this high enough that is what causes the flickering. if you push it far enough you will eventually get a black screen and you will have to restart your PC.
This you can do in increments of 25-ish. you don't want to push it massively, but you can push it much faster than the core-clocks. then run the benchmark every time you push the memory, To see if it "artifacts" or "flickers". if it starts to flicker you can either
A. Add a teeny-bit of voltage to see the flickering goes away.
B. just stop pushing it, bring it back in increments of 20. and see if the artifacting or Flickering goes away.
or if it flickers even at tiniest increments add a bit of voltage. NOT TOO much but a reasonable amount ike 5mv.
Realistically you don't ever have to touch the voltage, but i do just to see if it makes it alittle bit stable. but you don't have to.
however to give you a general idea of what is the average clocks on these R9-270s here is the website for it
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cheers for the advice but how do i unlock voltage control on msi after burner?
It's not available?
thats all i have when im on it
check if there is a tiny switch on your graphics card. it's usually there to switch between Legacy BIOS and UEFI BIOS. this right now tells me it's on Legacy BIOS. cause you can't touch the voltage. turn off the computer. hit that switch and restart. you should be able to modify the voltage after that.