so im not sure how much wat i need for my build

Ichigo1554

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MSI B150 PC MATE motherboard
Corsair Value Select - DDR4 - 16 GB
Samsung 850 EVO MZ-75E250 250 GB SSD
Toshiba DT01ACA300 3 TB HDD
Corsair Hydro Series H100i v2
Intel Core i7 7700K
Corsair Air Series SP120 with 2 fans
Corsair Air Series AF120 Quiet Edition with 1 fan
Corsair Air Series AF140 Quiet Edition with 1 fan
MSI GeForce® GTX 1080



and how much if i pick MSI GeForce GTX 1080 Ti Gaming X 11G instead of gtx 1080 msi ?
 
This is a bad pairing as the B150 motherboard wont be able to overclock. Thus you are spending alot more on K serries CPU and water cooler when you cant use that feature.

As far as power (for regular of ti version) you need a quality 650w unit. Seasonic or EVGA G2/G3/GS is what I would recommend.
 

Ichigo1554

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i dont need more w i was sure i had to buy 750 w for the build ik i cant overclock i will buy a MSI H270 GAMING M3 later on
 

Ichigo1554

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i didnt know you could danish also i thought i had to get 750 w from evga gold
 

Ichigo1554

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hmm here in our shops in denmark it says the 1080 use 500 w and the 1080ti use 600 w