Question i7 2700k, gtx 1660 Ti or gtx 1080 or rtx 2060

RealRemus

Reputable
Jul 7, 2016
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4,520
Hello everybody,
My current PC specs are:
Asrock Z77 Extreme4
Crucial MX500 250gb, Segate Barracuda 1T
16 gb Hyperx RAM, 1600 MHz
Corsair CS550M,
i7 2700k, stock cooler ( probaly will get nh-d14 or d15 )
MSI 1050, 2 Gb, OC.
I will maybe upgrading my GPU in the following month but I can realy decide which to chose. First I was picking between gtx 1660 Ti and rtx 2060 but I saw gtx 1080 was selling for almost the same price as gtx 1660 Ti. I was wondering if I could get gtx 1080 and good cooler like nh-d15 and oc the CPU to 4.5ghz - 4.9ghz. Would there be a problem with my PSU? I was calculating rougtly and got around 530 W from stress test data. Prime95 on the i7 2700k (stock is 95W) 4.5ghz ~180W. Gtx 1080 (stock is 180W) on stress test 220 W. And my all other components add up to 128W to a total of 528W. Did I calculate something wrong becouse this seems a bit much to me? If I shouldn't go for the 1080, should I go for the gtx 1660 Ti (120W) or gtx 2060 (160W)?
Thank you in advance.