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Overclocking the GTX980 memory core

post #1 of 7
Thread Starter 
Hi guys,

So I've read a lot of doomsayers saying you should avoid overclocking the graphics card memory clock, as it can overheat the video memory modules.. and since they usually don't have temperature sensors (or very good cooling), it can permanently damage your card.

Having said that, it seems to overclock pretty easily. As a test I managed to push an extra +155 core clock on my GTX 980 (Gigabyte G1 Gaming edition, which is already a bit factory-OC'ed), and could push memory clock up to +500 too. Both of these on +0 extra voltage. Must've been a good lottery card. There are even people who push +750/1000 on the memory clock, but I'm not quite that brave. I must say though, OC'ing the video memory clock makes a hell of a big difference in minimum fps. In fact, when i tried pushing some extra voltage (+25mV to start with) it became unstable and crashed.

Tested the OC settings on Unigine-Valley and 3DMark and they seemed stable enough, but I've reverted to stock clocks until I can get some more clarity on that video memory-overheating thing. Don't exactly want to fry the card just yet. Anyone know how accurate that is?

(I usually never overclock GPU's but some people suggest that OC'ing it may reduce the coil whine which is unfortunately quite common with the GTX970s and 980s in certain batches. While the OC didn't help the coil whine at all, it produced some amazing FPS results)

For those who are wondering, this is what I used:

Voltage: +0
Core: +155
Memory: +500
Total core: 1522 (up from "stock" 1366)
Total mem: 8002 (up from stock 7012)

With results in Unigine-Valley:

Minfps: 39
Maxfps: 150
Ave fps: 80
Firestrike: 12,700

Compared to stock:

Minfps: 28 (34% increase)
Maxfps: 133 (11% increase)
Ave fps: 71 (11% increase)
Firestrike: 11,200 (12% increase)

And basically no increase in temp (I suspect because the voltage was left untouched).
So, good results. But being careful here. Anyone have any solid info on that memory heat?
Edited by aktorsyl - 6/26/16 at 6:01am
post #2 of 7
you can do whatever you want. you'll hit max oc limit well before you overheat those ddr5 modules on G1 or most (if not all) AIB cards.
post #3 of 7
Thread Starter 
Thanks, so +500 definitely has no danger of overheating the memory modules?
Now I'm kind of curious what the max is.
post #4 of 7
Quote:
Originally Posted by aktorsyl View Post

Thanks, so +500 definitely has no danger of overheating the memory modules?
Now I'm kind of curious what the max is.
you mean like in going from 7000MHz to 7500MHz ? No way you're damaging anything. Depending on the memory manufacturer, I've seen ppl running 8300MHz Samsung memory on 980Ti's and it was fine. Even the reference cooler has thermal pads for memory.
Edited by Klocek001 - 6/26/16 at 12:19pm
post #5 of 7
Thread Starter 
Well yes, except +500 would make it run at 8000, not 7500, unless I'm getting the DDR figures messed up somewhere.
post #6 of 7
nah, 7GHz to 8GHz is a nice oc and safe too.
post #7 of 7
Thread Starter 
Thanks mate.
I'm pretty new to GPU overclocking, so playing it safe and making sure before I break something. I'm curious what my max OC would be on the G1's air cooler, so I need to play around with it a bit. Just a pity the OC'ing isn't helping for that damn coil whine, but oh well.
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