Knowing that the GeForce GTX 1080 Ti has significant headroom for overclocking, we were keen to see where our journey into the realm of enhanced clock speeds would take us.
Asus offer a tool called called Asus GPU Tweak II which has a range of presets and charts right out of the box. We used this in combination with MSI Kombuster to test stability upon every change we made.
First up, we check the card’s stability and temperature at default clock speeds:
Immediately you can something that makes overclocking a bit more of a dark art with modern GPUs – although the Asus ROG Strix GeForce GTX 1080 Ti OC edition is meant to feature a 1594 Mhz base clock and 1708 Mhz boost clock, the actual result is entirely based upon a thermal curve and will boost higher should the environment allow it. The combination of the triple wing-blade fan setup and the Maxcontact Technology heatsink allow the GeForce GTX 1080 Ti GPU to really stretch its legs, levelling out at a 1949 Mhz core clock without any modification to any settings.
This is truly impressive and shows the time and effort Asus have placed upon their thermal solution and frequency curve setup. The virtually guaranteed high clock frequencies will be very attractive to many gamers who want ‘the best’ without having to go to a significant amount of effort and tweaking to achieve it.
We clicked on OC Mode to see what further enhancements can be had:
OC Mode by comparison was an anti-climax. Once the core clock settles down, we reach a 1962 Mhz boost clock – a mere 13 Mhz higher. However, these results are not unexpected – even custom-loop water cooled cards only reach the 2100 Mhz arena.
We explored and investigated how we could push the envelope a little further by going into the Professional Mode settings. The following approach was taken to find the optimal clock frequencies for the card:
- Increased Power Target (%) to 120% to allow us plenty of headroom and ensure that breaching the regular TDP for the card wouldn’t down-clock our results
- Hunted the best core clock by increased the GPU Boost Clock in portions of 10 Mhz until the test crashed
- At the crash frequency, we applied additional core voltage (in segments of +25mV)) to see if the crash frequency was stabilised
- After finding the crash frequency, we backed off by 10 Mhz to get our find boost clock value
- Lastly, hunted memory clock frequency using a similar approach but in segments of 150 Mhz (again, backing off by 150 Mhz once we found the crash value)
So, as you can imagine, we had plenty of results ending similar to the screen-shot below. We tried to get +70 Mhz boost clock stable but the crashing could not be beaten with any increase in voltage….
However, +60 Mhz boost clock (without any voltage increase necessary) and also +740 Mhz memory clock proved to be perfectly stable for well over 20 minutes and though all our overclocked game testing:
Overall, our results were as follows:
- GeForce GTX 1080 Ti Founder’s Edition – Base Clock 1480 Mhz, Boost Clock, 1582 Mhz, Memory Clock 11000Mhz
- Asus ROG Strix GeForce GTX 1080 Ti OC Edition- Base Clock 1594 Mhz, Boost Clock 1708 Mhz, Memory Clock 11104 Mhz
- Asus ROG Strix GeForce GTX 1080 OC Edition (Overclocked) – Base Clock 1594Mhz, Boost Clock 2000Mhz, Memory Clock 11750Mhz
Impressively, temperatures did not increase as a result of our additional clock speeds.
We re-tested two game benchmarks and one synthetic benchmark to check the difference:
Whilst not earth shattering, the additional performance improvement is always welcome, however, the take-away from our experience here is Asus has already done the vast majority of the overclocking leg-work. Additional tuning is absolutely not required with this edition of card to get the most out of it.