Is a 320W power supply enough for an i7-4770 and GTX 1660 Super?
Asked by
MellowCedar47
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?
Answers
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.
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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.
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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.
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MellowCedar47: 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.