GTX1660 (120W) on a 12V/16A rail with a 45W CPU and 260W PSU?

I currently have a compact Mini-ITX PC which has an i5 3570T CPU (45W, Low-Voltage) paired with a 250W PSU (80+ Bronze) rated at 16A on the main 12V rail (~192W). The other 3.3V rail is rated at 18A (~60W). It currently has no GPU, 1HDD and 1SSD and the performance of Intel HD 2500 that came with my i5 CPU is... show more I currently have a compact Mini-ITX PC which has an i5 3570T CPU (45W, Low-Voltage) paired with a 250W PSU (80+ Bronze) rated at 16A on the main 12V rail (~192W). The other 3.3V rail is rated at 18A (~60W).

It currently has no GPU, 1HDD and 1SSD and the performance of Intel HD 2500 that came with my i5 CPU is mediocre at best, hence I'm looking for an upgrade.

I'm thinking about buying a Mini-ITX MSI GTX1060 3GB rated at 120W.

I'm no expert but I think 120W means it draws around 10A from the 12V rail, because 12V x 10A = 120W, correct?

Similarly, my 45W CPU will draw around 3.75A from the 12v rail (12V x 3.75A = 45W).

By these calculations; both the CPU and GPU will draw 13.75A from the 12V rail which is rated at 16A by the manufacturer.

Nvidia recommends a minimum of 450W PSU but by these calculations; my PSU should easily handle both with a little room to spare, correct?

Just need a second opinion before I pull the trigger, that's all!
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