[SOLVED] Knowing that a motherboard can support a GPU without a external power plug,would the power consumption at the wall increase by 75 watts using such a

[meemadd]

im thinking about putting a 1650 in a HP wich only has a 180 watt psu

 

[13thmonkey]

yes, the power has to come from somewhere, i'd never put any G{U on a 180W PSU, Not even a 20W device, that system will be so finely balanced i'd expect there is no headroom.

 

[ScrewySqrl]

yeah, a 180W PSU is probly too weak to support anything. I'd go with at least 250-300W.

power draw at the wall will vary by the PSU's efficiency rating.

so, lets say you have a system that uses 300W, an 80+ PSU (80% efficient) will pull 300/0.8 = 375W from the wall. an 80+ Bronze PSU (82% efficient) will pull 365.85W from the wall. in either case, the excess wattage becomes waste heat.

 

[tennis2]

Yup, agreed with above. Not to mention, the "180W" PSU probably can't supply 15A on the +12V rail (12V x 15A = 180W) There's a sticker on the side of your power supply that shows this info.

What is your actual machine? If the mobo and case accept "standard" ATX PSUs, a replacement isn't very expensive (Corsair CX450 = $20 after MIR) AND then you're not limited to a GPU without external power.