EVGA 670 having issues

[cesidio]

I have a EVGA 670 ftw which I overclocked through precision X. Everything was running fine until about 2 months ago, when I started to notice a slight performance decrease. When I looked into it more I discovered and learned about boost clock and its effects. Still, it wasn't that much of a performance loss but recently its been aggravating me. I began to notice that even in demanding games like shadow of mordor that boost clock wouldn't turn on. I currently have my card  core clocked to 1241 mhz and was wondering if boost clock wasn't turning on because my overclock is too high or if something is wrong. Furthermore, if something is wrong, how would I go about fixing it?

 

I cant figure out the issue

 

Here are my specs:

intel i7-3770k

16 gb of ram

extreme 650w modular power supply

EVGA 670 FTW

EVGA 650 TI (dedicated to physx)

asus P8Z77-V LK for motherboard

 

 

Thanks in advance.

 

 

[TheKDub]

1. please change the font colour to automatic!

 

2. Have you ever cleaned the dust out of it? GPUs tend to build up a bit of dust over time..