Hi all, I've recently purchased a classic Mac Pro (5,1 - flashed from a 4,1). It has the following spec: W3690 - 6 Core 3.46GHz 32GB RAM Nvidia GT120 GPU HDD - 640GB I think (Haven't really looked at what it is yet as intend to upgrade to SSD) I am a pro photographer and use a iMac 5K for work which suits me admirably but I am keen to run the Mac Pro as a secondary machine to use for occasional rendering tasks, such as exporting slideshows, and some FCPX. However my main intention for the machine is to use it as a gaming machine. I've always wanted a powerful gaming machine but haven't wanted to spring big money for a gaming PC that will only get used for gaming. My thinking with this setup is I'll have a good gaming machine but also have access to a 2nd, powerful Mac. I'm happy to run the machine under Bootcamp for gaming, and have installed Windows 10 onto it, but am now trying to figure out what is the best GPU purchase to maximise performance. My main gaming love is flight simming, specifically X-Plane 10/11 but I also want to spend some more time with other games such as Witcher 3, Elite and whatever the latest FPS games are these days (I've been out of the loop for a while). I'd also like to try out some VR stuff in the future - I currently own a DK2 which I have used sporadically. So, the main aim is good X-Plane performance, with other games an important secondary concern. I'm willing to drop some money on a good card, but the question is, what's the best bet? I understand that you can comfortably power up to approximately ~225w via the PCI-E slot (75w) + the 2 PCI-E AUX connectors on the motherboard (75w each) and am reticent to push beyond that or attempt complex mods to allow for more powerful cards. My inclination is to go for a GTX 1080 as these are rated at 180w according to Nvidia and are basically top of the tree before you push through that 225w power threshold. That said, I'm unclear, and have struggled to find info on whether or not the W3690 can feed these high end 10 series GPUs fast enough to unlock their true potential. I don't want to spend a bunch of change on a 1080 to find that actually a 1060 would have provided the same performance levels due to a CPU bottleneck. On the flip side, if a 1080Ti or a Titan was going to offer significant leaps in performance and could be installed via a reasonably safe and non-complex process then I'd consider it. While I don't want to screwup my new machine, or overload the traces on the mobo I'm ready to enjoy as much gaming speed as this machine can provide and am willing to spend a bit to access it! I've also seen that Nvidia have announced official Mac support for their 10 series (Pascal) cards so I imagine these could be decent investments for use on the Mac OS side of things as well? Sorry for the long post, any input or advice would be gladly welcomed! If you have experience with any of this, I'd love to hear your thoughts or see some in-game benches.