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).
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douglord - Monday, June 1, 2015 - link
I need to know if the 980ti can output 10-bit color correctly? Is it ready for UHD Blueray?dragonsqrrl - Monday, June 1, 2015 - link
To my knowledge only Quadro's and Firepro's output 10 bit color depth.johnpombrio - Monday, June 1, 2015 - link
Any card that can do true RGB color schemes are NOT MEANT for normal users. It brings a lot of drawbacks for games and normal tasks. These type of cards are for graphics professionals only. Google it to see why.mapesdhs - Wednesday, June 3, 2015 - link
Indeed, the way colourspaces interact with different types of monitor can result in some nasty issues for accurate colour presentation. For home users, it's really not suitable since so many normal apps & games aren't written to utilise such modes correctly. Besides, I doubt any 4K TVs could properly resolve 10bis/channel anyway. Funny though that people are still asking about 10bit colour when pro users were already using 12bit more than 20 years ago. :D Also 16bit greyscale for medical/GIS/etc.johnpombrio - Monday, June 1, 2015 - link
Yikes! That overclock ability! I always buy EVGA's superclocked NVidia cards as they as super stable and have great benchmarks (as well as playing games well, heh). I might buy into this even tho I have a GTX980.As for AMD, NVidia has 76% of the discrete GPU graphics card market (and still rising) while AMD has lost 12% market share in the last 12 months alone. Whatever AMD has up for new products, it better hurry and be a LOT better than NVidia cards. AMD has tried the " rebadge existing GPU family cards, reduce its price, and bundle games" for too long and IT IS NOT WORKING. C'mon AMD, get back into the fight.
mapesdhs - Wednesday, June 3, 2015 - link
True, I kept finding EVGA's cards work really well. The ACX2 980 (1266MHz) is particularly good.Nfarce - Monday, June 1, 2015 - link
Well I recently upgraded with a second 970 for SLI for 1440p gaming and have them overclocked to 980 performance. It's roughly 15% faster than this single card solution for $700 vs. $650 (7.5% increase in cost). But one thing is for certain: we are still a long time away from realistic 4K gaming with a G-sync 120Hz monitor when those come out. I would much prefer 1440p gaming with max quality and high AA settings and faster FPS matched to screen Hz than detuned 4K settings (even if AA is less meaningful at 2160p).By the way: are you guys ever going to add Project Cars to your benchmarks? It has rapidly become THE racer to own. Grid Autosport is not really a good benchmark these days because it's just a rehash of the Grid 2 engine (EGO 3.0)...easy on GPUs. Many, including me, haven't touched Autosport since PCars was released and may never touch it again.
mapesdhs - Wednesday, June 3, 2015 - link
Project Cards is one game that runs badly in CF atm (driver issues), which would make the 295x2 look horrible. Might be better to wait until AMD has fixed the issue first.agentbb007 - Monday, June 1, 2015 - link
A GTX Titan X for $649, DOH BART! Oh well I've enjoyed my SLI Titan X's for a few months so I guess that was worth the $700 premium. I keep falling for nVidia's Titan brand gimmick, I also bought the original Titan luckily just 1 of them and ended up selling it for about half what I paid.Lesson learned, AGAIN, don't buy the Titan brand wait for the regular GTX version instead.
mapesdhs - Tuesday, March 12, 2019 - link
2019 calling! I wonder if he bought the 2080 Ti or RTX Titan... :}