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Still think it is 160 DC

GPU is rated 120w

CPU is rated 65w

MB will be about 10w

No mention of storage so lets assume SSD, thats 5>10 w

Ram.  hard to say, but outervision with just 2 x DDR4  ( and standard KB and mouse inc) shows 65w

and that is without any USB device,  extra fans, LED  etc... not saying the OP has any such, but just how these things add up

I would pitch for at least 300w  DC-ATX