I need help for my PSU (power)

Hi,

I’m going to upgrade my graphic card and im don't is my PSU enough for new upgrade or not!!! so pleaseee helpp T_T

my PC Detail is:

• motherboard asuse H110-Plus with 4 Pin ATX Power Connector
• CPU intel core i3 6100 3.700 MHz with a normal Fan (model: E97379-003) 12v DC , 0.60A
• 2× 8GB memory Ram 3000MHz G.skill
• 2x HDD 2T
• DVD Raw

and my PSU is Gigabyte 450w (peak power 550w) i don't know what that mean is it 450w or 550w!!! im searched in google and all i found they write it's actually 550w... the exact model is (GE-P450P-C2) and it have 6+2 PCI

So now my vga is asus 1050 strix i want to buy 1060 6GB strix or zotac is my PSU enough for the 1060???

in Green calculatin website it say your pc AVG power usage is 335w and it suggested a 430w power...