VisionTek claims their WB'd CryoVenom R9 290
http://www.visiontekproducts.com/index.php/component/virtuemart/graphics-cards/visiontek-cryovenom-liquidcooled-series-r9-290-detail?Itemid=0 for $550 is "Up to 24% Faster Performance Without Voiding Warranty" and "Faster Than NVIDIA GeForce GTX 780 Ti, Yet Costs $150 Less" running at 1175/1450 Mhz's - I can't say how the CryoVenom R9 290 would actually compare in Gaming FPS or Benching but if you're already under water that's a great price.
Here's interesting uTube videos from Tom and Linus which presently sums up how AMD's latest R9 290/X compares to nVidia's GTX 780/Ti:
http://www.youtube.com/watch?v=N3oE-5dGTKc
http://www.youtube.com/watch?v=3OHKWMgBhvA
http://www.youtube.com/watch?v=RqaHh-y51us
It's sounds rather bleak if AMD AIB Partners Air Cooling solutions will live up to expectations and make the card a competitive over-clocker with nVidia Air Cooled Solutions as Hawaii is too HOT of a COOKIE to be effectively cooled under air: That is; keep it under 90C, keep it quiet and keep it from throttling.
I can't complain as I was fortunate to buy my GA- Ref R9 290X for the MSRP price of $549 CDN, that is before the 290 release and prices went insane due to Crypto Mining but I also had to shell out and extra $150 for a Water Block and fittings.
Sure wished I had the insight to have bought 2 Ref 290's at $399 ea when they where available; however, if and when the CryoVenom R9 290 is available again for $550 and available in Canada for that price, I will consider selling this XSPC Razor R9 290X and buying 2 CryoVenoms.