The NVIDIA GeForce GTX 970 Review: Featuring EVGA
by Ryan Smith on September 26, 2014 10:00 AM ESTOverclocking
With GTX 980 we saw first-hand how GM204 had very significant overclocking headroom. Even without the ability to meaningful overvolt on NVIDIA cards, we were able to push our base GPU clock speed up from 1126MHz to 1377MHz, or in terms of the maximum boost bin, from 1265MHz to 1515MHz. Consequently with GTX 970 shipping at lower clock speeds, we have very lofty expectations here.
But running counter to that will be TDP. As we have already seen, GTX 970 is TDP limited right out of the gate, so even if our card has more clock speed headroom, its 110% TDP limit doesn’t leave much more in the way of power headroom. Furthermore as this is already a factory overclocked card, there’s no guarantee that EVGA has left us much overclocking headroom to play with in the first place.
| EVGA GeForce GTX 970 FTW Overclocking | ||||
| FTW | Overclocked | |||
| Core Clock | 1216MHz | 1241MHz | ||
| Boost Clock | 1367MHz | 1392MHz | ||
| Max Boost Clock | 1418MHz | 1455MHz | ||
| Memory Clock | 7GHz | 7.8GHz | ||
| Max Voltage | 1.218v | 1.243v | ||
And in fact our results show they haven’t. We aren’t able to get even another 50MHz out of our GPU before errors start setting in; 25MHz is all we will get, which pushes our base GPU clock speed from 1216MHz to 1241MHz, and our maximum boost clock from 1418MHz to 1455MHz. Overall this is a weaker overclock than GTX 980, though not immensely so.
Meanwhile memory overclocking was just as fruitful as it was on GTX 980, with our card being able to handle up to 7.8GHz on its GDDR5 memory. As we saw with GTX 980 we’re nearly as memory bandwidth bottlenecked as we are GPU bottlenecked, but we will take what performance we can get.
As you’d expect from such a mild overclock, the performance increase is very limited. Our overclocked GTX 970 FTW does close on GTX 980 even more, but even with this full overclock it won’t overcome the 3 SMM deficit.
Overall in all likelihood the GTX 970 FTW benefits more from the 10% increase in TDP than it does the clock speed increase. GTX 970 – and GM204 in general – clearly desires to be fed with more voltage and more power overall than what any NVIDIA approved card is going to see.
Power consumption and noise tick up, but only slightly. The limited 10% TDP increase means that the amount of power the card can draw and dissipate as heat only increases slightly. You aren’t getting much more performance, but you also aren’t getting much more noise.
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dibbademevos - Tuesday, September 30, 2014 - link
hidibbademevos - Tuesday, September 30, 2014 - link
hi
SkyBill40 - Wednesday, October 1, 2014 - link
Having always been an MSI guy, I've not really considered going with another vendor... until now. This looks like a nice card which also happens to conveniently match my color scheme whereas the red coloring of the MSI Gaming line sadly does not. Still, the overclocks are pretty much a wash and the only real differences seem to be in the cooling solution. The ACX 2.0 seems to be on par with the MSI, so I suppose I could go either way.Oxford Guy - Saturday, October 4, 2014 - link
Is it the case that the ACX card uses only 4 power phases which is why overclocking it beyond the factory setting isn't going to work very well? There is no mention of power phases in your article.Kanuj5678 - Sunday, October 5, 2014 - link
GTX 970 beats the shit out of everything and that too in style with lowest TDPCheers
Kanuj
ambientblue - Wednesday, April 29, 2015 - link
Enthusiasts dont care about TDP that much. The 290x is held back by HSF cooling (Uber mode is actually stock advertised speeds) while the GTX 970 is not. Water-cool the 290x and OC it to 1200mhz and it will match a 980, surpassing it at 4K resolution easily.igyb - Tuesday, October 7, 2014 - link
Is the gtx 970 just an underclocked 980? i might just get that because i cant really afford a 980.Kimtastic - Tuesday, October 21, 2014 - link
Dear Ryan,I had a MSI GTX 970 and found that under heavy load the core clock was fluctuating and causing FPS drops. After having read this article, I now understand that its due to the TDP limit. Is this something that will/can be fixed or something permanent?
I would be grateful for your advice. Many thanks.
hoohoo - Thursday, October 23, 2014 - link
Thank you for including an HD7970 in the test!Shoiti2 - Monday, November 3, 2014 - link
Those price are damn cheap. I would say, buying a gtx980 in the U.S wouldnt even buy a gtx 970 in Brazil. I'm living in Brazil right now and ordered an evga gtx 970 sc. Ok, how much did i pay for the gtx 970!! Nothing less than $750USD.the Gtx 970 at $750USD still very cheap for us Brazilian, the world's most expensive country.
The evga gtx 980 is costing around $1100USD, not kidding, check for yourself.