LmeAde2

Definitely go with the Sapphire NITRO R9 380 4GB http://www.amazon.com/Sapphire-DL-DVI-I-DL-DVI-D-Graphics-11242-07-20G/dp/B00ZGL8D5M/ref=sr_1_1?s=pc&ie=UTF8&qid=1442519585&sr=1-1&keywords=r9+380. I wouldn't touch a card with less than 3GB VRAM anymore unless you play 1080p or lower resolution or older games.

The ASUS GTX 980Ti Strix http://www.amazon.com/GeForce-Overclocked-384-bit-DisplayPort-Graphics/dp/B011ERJTYU/ref=sr_1_2?s=pc&ie=UTF8&qid=1442435115&sr=1-2&keywords=980ti+strix is the best for those not wanting to overclock. It has the highest clock out of the box, best cooling, and most silent operation of the models available. ASUS cards just look aesthetically great also.

The EVGA GTX 960 SSC ACX http://www.amazon.com/EVGA-GeForce-128bit-Graphics-04G-P4-3966-KR/dp/B00UOYQ5LA/ref=sr_1_2?s=pc&ie=UTF8&qid=1441847399&sr=1-2&keywords=gtx+960 would be my recommendation if those are the only two options you are looking at. The EVGA comes clocked much higher out of the box and EVGA has the best warranty and customer support in the industry. The Gigabyte is really not a viable option unless you prefer its aesthetics. The cooling and noise may be slightly better with the Gigabyte but not that much.

The Kraken G10 only supports AseTek style coolers like the one used in this video. https://youtu.be/RlGMhASE22w?list=PLTLW-NE1XjRCDLWTgKec1BCKucCXqrqdq

Your best bet is a 980Ti as was already suggested. I'd recommend the MSI GTX 980Ti Gaming model http://www.amazon.com/MSI-GTX-980TI-GAMING-6G/dp/B0106QZE62/ref=sr_1_1?s=electronics&ie=UTF8&qid=1441676373&sr=1-1&keywords=980+ti+gaming&pebp=1441676389126&perid=1B0XFX3Y77A7BF7E7X8K specifically. I've tested the Gigabyte G1 Gaming, ASUS STRIX, and EVGA SC ACX 2.0 also and the MSI ended up my favorite, to my surprise. The MSI ran the quietest by far, came with a nice OC out of the box, ran very cool, and the aesthetics didn't hurt either. Of course aesthetics are a personal preference but it matched my build.

Definitely the Sapphire R9 390 NITRO http://www.amazon.com/Sapphire-Radeon-Version-Graphics-11244-00-20G/dp/B00ZGL8CYY/ref=sr_1_2?s=electronics&ie=UTF8&qid=1441676552&sr=1-2&keywords=r9+390&pebp=1441676569728&perid=115MKAXR2RAS3BGQE290. The R9 390 is a faster card and for 1440p or higher resolutions it pulls away even further in the lead. Good choice with Sapphire, best AMD manufacturer in the industry.

An ASUS GTX 980Ti STRIX http://www.amazon.com/GeForce-384-Bit-GDDR5-Graphics-STRIX-GTX980TI-DC3-6GD5-GAMING/dp/B013XFK0SK/ref=sr_1_2?s=pc&ie=UTF8&qid=1441080737&sr=1-2&keywords=980ti is easily the best option. Not even the R9 Fury would be better.

Have to remember this is at 1080p and also on Grid.

Definitely go with the Gigabyte GTX 950 WF http://www.amazon.co.uk/GIGABYTE-128-Bit-Dl-DVI-I-Windforce-Graphics/dp/B0146YLBTO/ref=sr_1_fkmr0_1?s=computers&ie=UTF8&qid=1440639814&sr=1-1-fkmr0&keywords=GIGABYTE+NVIDIA+GTX+950+WF+O. The performance to power consumption and price is excellent.

I would go with the EVGA GTX 980Ti SC+ ACX 2.0 http://www.amazon.com/EVGA-GeForce-Graphics-Backplate-06G-P4-4995-KR/dp/B00YDAYOK0/ref=sr_1_1?s=pc&ie=UTF8&qid=1440445754&sr=1-1&keywords=980ti. EVGA is the most reliable manufacturer and has the best warranty in the industry. This particular model has great cooling and an excellent OC out of the box.

Definitely the R9 380. I could recommend the GTX 960 but that would be foolish. The Gigabyte R9 380 G1 Gaming http://www.amazon.com/Gigabyte-Gaming-Graphics-GV-R938G1-GAMING-4GD/dp/B00ZGF3TUC/ref=sr_1_1?s=photo&ie=UTF8&qid=1440378205&sr=8-1&keywords=r9+380 is the best option available at the moment as well. Go that route.

I came across this youtube page a while ago and it has a lot of Kraken G10 information and install videos on it. http://youtu.be/TcuSHFob4qM?list=PLTLW-NE1XjRCDLWTgKec1BCKucCXqrqdq. According to NZXT's website the GTX 960 won't work. http://www.nzxt.com/product/detail/138-kraken-g10-gpu-bracket.html They only list reference design compatibility but the GTX 960 likely has to short of a PCB for the VRM fan to cool it properly.

I can tell you that I will give you a lifetime warranty but that doesn't mean I'm actually going to give you the service to go with it. I've had an experience with Zotac RMA and it's not the smoothest process. EVGA is the best support in the business.

The TITAN X will give you absolutely no benefits (unless you do any rendering or editing work) and especially at 1440p.

The GPU drives the frames per second but the monitor limits the maximum frames you can view. 144Hz means you cannot "see" more than 144fps.