The NVIDIA GeForce GTX 980 Ti Review
by Ryan Smith on May 31, 2015 6:00 PM ESTOverclocking
Finally, no review of a high-end video card would be complete without a look at overclocking performance.
From a design standpoint, GTX 980 Ti already ships close to its power limits. NVIDIA’s 250W TDP can only be raised another 10% – to 275W – meaning that in TDP limited scenarios there’s not much headroom to play with. On the other hand with the stock voltage being relatively low, in clockspeed limited scenarios there’s still some room for pushing the performance envelope through overvolting. And neither of these options addresses the most potent aspect of overclocking, which is pushing the entire clockspeed curve higher at the same voltages by increasing the clockspeed offsets.
GTX Titan X by comparison ended up being a good overclocker, and while we'd expect GTX 980 Tis to use slightly lower quality chips as part of the binning process, it should still overclock rather well.
| GeForce GTX 980 Ti Overclocking | ||||
| Stock | Overclocked | |||
| Core Clock | 1000MHz | 1250MHz | ||
| Boost Clock | 1075Mhz | 1326MHz | ||
| Max Boost Clock | 1202MHz | 1477MHz | ||
| Memory Clock | 7GHz | 8GHz | ||
| Max Voltage | 1.187v | 1.23v | ||
Overall we're able to get another 250MHz (25%) out of the GTX 980 Ti's GPU, and another 1GHz (14%) out of its VRAM. This pushes the GTX 980 Ti's clockspeeds up to 1326MHz for the standard boost clock, and 1477MHz for the maximum boost clock. The card is heavily TDP limited at this point, so it's unlikely to sustain clockspeeds over 1400MHz, but working clockspeeds in the 1300MHz range are certainly sustainable. Meanwhile interestingly enough, this is actually a slightly better overclock than what we saw with the GTX Titan X; the Titan was only able to get another 200MHz out of its GPU and 800MHz out of its memory. So GTX 980 Ti ends up being the better overclocker by 50MHz.
The gains from this overclock are a very consistent across all 5 of our sample games at 4K, with the average performance increase being 20%. Though not quite enough to push the GTX 980 Ti above 60fps in Shadow of Mordor or Crysis 3, it is enough to crack 60fps on Battlefield 4 and The Talos Principle.
The cost of that 20% overclock in terms of power and noise is similarly straightforward. You're looking at an increased power cost of 30W or so at the wall – in-line with the 25W increase in the card’s TDP – while on the noise front the GTX 980 Ti is pushed out of its sweet spot. Card noise levels will increase by around 4.5dB(A).
Facebook
Twitter
RSS
290 Comments
View All Comments
TheJian - Tuesday, June 2, 2015 - link
Depends on where you live. At a mere 3hrs per day (easy if more than one person uses it) at 270w difference even Ocing it, you end up $75 a year savings in a place like Australia. That ends up being $300 if you keep it for 4yrs, more if longer. In 15+ states in USA they are above 15c/kwh (au is 25.5c) so you'd save ~$45+ a year (at 15.5, again 14 quite a bit above this), so again $180 for 4yrs. There are many places around the world like AU.Note it pretty much catches 295x2 while doing it Oced. It won't put off as much heat either running 270w less, so in a place like AZ where I live, this card is a no brainer. Since I don't want to cool my whole house to game (no zoned air unfortunately), I have to think heat first. With Electricity rising yearly here, I have to think about that over the long haul too. TCO is important. One more point, you don't deal with any of the "problem" games on NV where crossfire does nothing for you. Single chip is always the way to go if possible.
If you have a kid, they can blow those watts up massively during summer for 3 months too! WOW users can do 21hrs on a weekend...LOL. I'd say Skyrim users etc too along with many rpg's that will suck the life out of you (pillars, witcher 3, etc). A kid can put in more time in the summer than an adult all year in today's world where they don't go out and play like I used to when I was a kid. You're shortsighted. Unless AMD's next card blows this away (and I doubt that, HBM will do nothing when bandwidth isn't the problem, as shown by gpu speeds giving far more than ocing memory), you won't see a price drop at all for a while either.
If rumors are true about $850-900 price for AMD's card these will run off the shelf for a good while if they don't win by a pretty hefty margin and drop the watts.
mapesdhs - Wednesday, June 3, 2015 - link
Add Elite Dangerous, Project Reality, GTA V, the upcoming Squad and various other games to your list of titles which one tends to play for long periods if at all.Ian.
Deacz - Wednesday, June 3, 2015 - link
860€ atm :(ddferrari - Sunday, June 14, 2015 - link
I guess you're one of those people who care more about specs than actual performance. Seriously, is 28nm just too big for ya? It's 3% slower than the fastest gpu on Earth for $650, and you're whining about the transistor size... get a life.Michael Bay - Sunday, May 31, 2015 - link
I`d much rather read about 960...pvgg - Sunday, May 31, 2015 - link
Me too...Ryan Smith - Sunday, May 31, 2015 - link
And you will. Next week.just4U - Sunday, May 31, 2015 - link
The 960 is a underwhelming overpriced product.. I'd be more interested in a Ti variant if I was looking to buy right now.. but no.. although that 980Ti is tempting, I'd never purchase it without seeing what AMD is doing next month.Oxford Guy - Monday, June 1, 2015 - link
"The 960 is a underwhelming overpriced product."There you go, Michael, you've read about it.
PEJUman - Sunday, May 31, 2015 - link
GM206 based 960xx? or a further cut on GM204? ;)My gut feel tells me it would be GM204 based: I am guessing ~3B trans on GM206 on a very mature 28nm process should be relatively doable without much defects.