[SOLVED] whats best cpu cooler for i7 8700k?

Solution
Very similar to my build in terms of main components. H115i is an okay choice, there are certainly better ones , but they are more expensive. Some of your Krakens are copper/brass and some of the fancier ones allow expansion through quick release joints or are just expandable and refillable to be the core of a custom loop.

More or less how I dealt with mine. Started with an old Swiftech H240 (280mm), added a GPU block, and another 280mm radiator.
Very similar to my build in terms of main components. H115i is an okay choice, there are certainly better ones , but they are more expensive. Some of your Krakens are copper/brass and some of the fancier ones allow expansion through quick release joints or are just expandable and refillable to be the core of a custom loop.

More or less how I dealt with mine. Started with an old Swiftech H240 (280mm), added a GPU block, and another 280mm radiator.
 
Solution
Very similar to my build in terms of main components. H115i is an okay choice, there are certainly better ones , but they are more expensive. Some of your Krakens are copper/brass and some of the fancier ones allow expansion through quick release joints or are just expandable and refillable to be the core of a custom loop.

More or less how I dealt with mine. Started with an old Swiftech H240 (280mm), added a GPU block, and another 280mm radiator.

what you recommend I'm new to liquid cooling
 
Well, your typical AIO is a copper cold plate and an aluminum radiator. This works well enough, but typically it is a bad idea to mix metals in a solution. One will start to leach ions from the other. They put in anti-corrosives, anti-freeze(for shipping in cold weather), and biocidal agents to prevent bacteria and algae growth. Pretty sure all of Corsair's offerings fall under this.

The more expensive models will use Copper and Brass radiators (copper radiator, brass fittings/joints) Copper is a more effective radiator material, but is more expensive. An example would be Alphacool's Eisbear solutions.

A lot of the higher priced AIOs offer RGB lighting, displays (temperature, animated logos, etc), and fan controllers. Depends on if you want to prioritize cooling or appearance.

And finally you have all the custom side of things. That is getting quite a bit more expensive, and isn't what most people need. I suppose what I have could be considered semi-custom, since I use Rad/Res/Pump combo. Typically the pump and reservoir would be a unit. Alphacool, EK, and others make expandable water cooling loops, pre-filled GPU blocks that can be plugged into their CPU coolers with quick disconnects.

Hardline tubing probably close to the hardest thing you can do.

H115i is a fine choice, Corsair stock fans are a little loud when maxed out, but you shouldn't run them at max.
 
Well, your typical AIO is a copper cold plate and an aluminum radiator. This works well enough, but typically it is a bad idea to mix metals in a solution. One will start to leach ions from the other. They put in anti-corrosives, anti-freeze(for shipping in cold weather), and biocidal agents to prevent bacteria and algae growth. Pretty sure all of Corsair's offerings fall under this.

The more expensive models will use Copper and Brass radiators (copper radiator, brass fittings/joints) Copper is a more effective radiator material, but is more expensive. An example would be Alphacool's Eisbear solutions.

A lot of the higher priced AIOs offer RGB lighting, displays (temperature, animated logos, etc), and fan controllers. Depends on if you want to prioritize cooling or appearance.

And finally you have all the custom side of things. That is getting quite a bit more expensive, and isn't what most people need. I suppose what I have could be considered semi-custom, since I use Rad/Res/Pump combo. Typically the pump and reservoir would be a unit. Alphacool, EK, and others make expandable water cooling loops, pre-filled GPU blocks that can be plugged into their CPU coolers with quick disconnects.

Hardline tubing probably close to the hardest thing you can do.

H115i is a fine choice, Corsair stock fans are a little loud when maxed out, but you shouldn't run them at max.

so you think H115i will be fine
 
I’ve used H100i v2 for 3 years with i7-8700K. It does keep the temps low (65-70 degrees) under load. Never tried running benchmark tests.
Now the AIO’s pump has died. I’m planning to get a new AIO (360 mm).