PSU for 1660ti/3050

[Gilgamang]

I'm restoring an old HP P7-1380T with a 300W PSU and was wondering if it is sufficient for a 1660ti or 3050 which have a tdp of 120w.

[kitnoman]

120w for gpu and probably 65w for your cpu, then add another 50w for other components, like ram, fans storage. So estimated 235w max power consumption(which will not happen on normal usage). Personally, the PSU I pair with my system is one that the total max power of the system is around 70% or below of the total wattage the PSU is rated. For 300w, the 70% is at 210w. 235w is around 78%, so still decent, specially if the spu is a decent brand and model. In real world usage, you probably won't be using more than 150-200w when gaming. So yeah, your plan could work. Also undervolt your gpu and cpu.

[Failure 101]

1 hour ago, kitnoman said:

120w for gpu and probably 65w for your cpu, then add another 50w for other components, like ram, fans storage. So estimated 235w max power consumption(which will not happen on normal usage). Personally, the PSU I pair with my system is one that the total max power of the system is around 70% or below of the total wattage the PSU is rated. For 300w, the 70% is at 210w. 235w is around 78%, so still decent, specially if the spu is a decent brand and model. In real world usage, you probably won't be using more than 150-200w when gaming. So yeah, your plan could work. Also undervolt your gpu and cpu.

I would also check if the PSU power wattage rating is based on just the 12V rail or all the rails combined.

[Gilgamang]

8 hours ago, Failure 101 said:

I would also check if the PSU power wattage rating is based on just the 12V rail or all the rails combined.

How do I do that? What is the 12V rail? Here is the power supply.