Thunderballs :
This is an excellent card. I have bought a second 1080 and am now GTX 1080 SLI and 1440p.
Personally I prefer the flexibility of having the two cards as I can sell one or both on and have benefited from the price drop in the second hand market.
SLI not a problem for me in the games I play.
The problem for SLI w/ 10xx series id SLI isn't what it was with 9xx series, For 9xx, scaling at 1440p, was over 70% in TPUs 16 game test suite. With 10xx, it's just 18% and with 1440p it's just 30% which makes it very hard to justify the additional expense. At 4k, it's over 50%.
Why is this ? Possibilities include:
a) GPU advancements have been as much as 50+% generation to generation where each CPU generation has averaged < 5% since 2011. This has resulted in the GPU being less of a bottleneck than it once was.
b) With the 1070 / 1080 being the only SLI capable cards, and no competition from AMD as yet, improved SLI performance will impact the sales of only 1 card ... the 1080 ... and soon the 1080 Ti once the non reference cards come out. Improved SLI performance therefore would therefore cut into nVidia's bottom line as it would mean more 1070s sold and less 1080 / 1080 Tis sold and the more expensive cards have higher profit margins.
The Asus Strix is 3% faster than the reference 1080 Ti and let's look at what happens under load:
The Asus (blue line) maintains a stable 1925 core speed whereas the reference card throttles and after about 1.5 minutes, is unable to get anywhere near that with cores ranging between 1660 and 1770. All that spiking is the source of stuttering seen on screen.
Tis is basically a repeat of what we have seen with every FE card. TPU has the FE at 84C under load; the Strix version is at 69C. Throttling occurs at 82C and the FE again throttles right outta the box.