GTX 770 OC Problem

PKLee · April 27, 2016

Hey guys. I just tried overclocking my old 770 with Afterburner and a problem occurred.

I got core 1293MHz and VRAM 3903MHz (on Afterburner, on GPU-Z it's 1951.7MHz), was great when doing 3DMark, but then at some point the core went down to about 530MHz and never went above that. The problem is solved after rebooting, but it happened again when I played Dirt Rally later today. The screen froze and the game quitted, then the core fell down to 530MHz again. Again, solved after rebooting.

How could it happen? Is it because that I've overclocked it too much? It never occurred at stock frequency.

BTW why VRAM frequency on GPU-Z is 1951, on Afterburner is 3903, while I know that it actually is around 7806?

positivePXL · April 27, 2016

Thermal throttling?

DioOmicida · April 27, 2016

8 minutes ago, PKLee said:

BTW why VRAM frequency on GPU-Z is 1951, on Afterburner is 3903, while I know that it actually is around 7806?

GDDR5 uses "quad pumped" technology, which within one clock cycle can do four data transfers.
So it's really up to the program how it wants to display clock speeds. 1951 or 1951x4