I've been using an older budget PC for years because it handles games like League of Legends, Valorant, and Call of Duty: Black Ops II at 144 FPS or more. Lately I've become more interested in single-player games, especially the Assassin's Creed series, and I only plan to play at 1080p. My current system has an i7-4770, GTX 1050 Ti, and 16GB of DDR3 memory. Would my existing 320W power supply be enough if I upgraded to a GTX 1660 Super?
3 Answers
A 750W unit would work, but it’s overkill for an i7-4770 and 1660 Super. Buy a quality 450–550W supply instead, unless you’re planning a much more demanding future upgrade. Also check whether your current 320W unit is an OEM model without a PCIe power cable, since that could prevent the graphics card from working properly.
The 1660 Super’s commonly listed minimum is 450W. Your computer might technically draw less than that under normal gaming loads, but a low-end 320W PSU leaves very little safety margin. Replacing it with a reputable 450–500W model is the sensible option.
I wouldn’t rely on a 320W unit for this upgrade. Even if the estimated total draw looks close to 280W, power-supply calculators don’t account for every transient spike, aging, or the quality of the unit. A good 450–500W power supply would be a much safer choice, assuming it has the required PCIe power connector.
The estimated usage I saw was around 280W, so I thought the remaining 40W might be enough. I’ll check the PSU’s quality and connectors before deciding.