EpIckFa1LJoN :
Basically you have the chip itself, then other companies usually alter the PCB (Printed Circuit Board) usually by adding power components for overclocking efficiency. Then they will add custom cooling, heatsinks and fans, and many models are factory overclocked. The big advantage of factory OC'd cards is that you can increase the performance of the GPU without having to do much tweaking with voltages and such yourself.
As far as the 1080 goes the OC cards are about 7-10 fps more than the reference Founder's edition card, as well as having MUCH better cooling, pascal cards tend to overheat more and throttle which you definitely want to avoid. For that reason I prefer 3-fan cards. The two top cards are the Zotac Amp Extreme and the Asus ROG Strix. But the Zotac AE is a bit cheaper and is slightly better.
The other guy mentioned the Amp, but I wouldn't go for that one, simce you have to adjust the fan profile significantly more to keep it cool enough.
I own the Amp Extreme and out of the box I have gotten up to 2071MHz, adjusting only the fan speed, running the fans at 50%. Recently I run the "Advanced" preset fan profile which is tiered to kick on the fams more depending on the temp, 10% at 10C, 20% at 20C etc., using that profile I have yet to see my gpu go over 50C, and as I said the clock hits up to 2071MHz and I constantly clock it at 2050MHz, which is more than it is advertised to hit, and the Strix, out of the box with no extra tweaking outside the fan profile.
I HIGHLY recommend the Zotac Amp Extreme for current 10 series cards.
Compared to other cards it is the best, even if marginally, and has the best PCB and components.
Hey,
Agree with almost everything said, apart from that apart from that about the Zotac AMP Card.
As I am not keeping the card, I have not tweaked it too much, just 150MHz boost on the core and 200MHz boost on the Memory, with stock Voltage and Power Limit.
I run the stock fan curve, and in an intensive game, the card sits in the low-mid 60s, reaching 70 very occasionally.
Although this is not as cool as the triple fan editions of the card it is certainly safe and a good operating temperature for the card.
My reason for arguing this cards point, is its price. In the UK, I picked up the card for 530GBP a great price. Whereas the Amp Extreme is 700GBP. Which, in my opinion isn't worth the 170GBP more for improved temperatures.