Question R9 280X stresstests causes clock drops

[arcsaber]

Hey guys,

I am currently playing around with GPU overclocking using MSI Afterburner.
While stresstesting with Geeks3D FurMark v1.20.4.0 I noticed periodic coreclock drops.
My System:
GPU: Powercolor R9 280X with a basecoreclock of 1030MHz and a basememoryclock of 1500MHz
CPU: AMD FX-8350 not overclocked
Mainboard: ASUS M5A97 R2.0
RAM: 8GB
OS: Windows 10

What could be causing the drops and is it serious? I've not tested the stability in games yet.

Screenshot:

https://imgur.com/rKV7Bq6

View: https://imgur.com/rKV7Bq6

The coreclockspeed in the screenshot was 1150MHz

 

[mgallo848]

What were the temps during the clock drops?

 

[arcsaber]

The temps are around 79-81°C. The drops do not happen in a specifical regularity like if drops immediately once it reaches 81°C

 

[mgallo848]

Try raising the fan speed up and stress it again. I had 2 7970's (same card as yours) both at 1050/1550 for years without an issue.

 

[arcsaber]

I've set the fan speed to automatic in MSI Afterburner.
70°C => 70%
80°C => 80%
more than 90°C => 100%
Should I raise the curve?

Update:
I raised the fancurve to 80°C => 90%.
I am at 1130MHz now and still got no drops after 10 minutes. Seems like the solution is simple as that thank you