Hello everyone, so I have a Galaxy GT 640 I would like to put in my Dell Inspiron 570 with an AMD Athlon IIX2, but I'm not sure if the PSU is good enough. The stock PSU it came with is a HIPRO HP-P3017F3 that only has 300w and 18A on the 12V rail. However from what I've heard Dell PSUs are underrated but I still don't want to risk it without more information. If I need to upgrade my PSU, would this be a good choice?
Who did specify 20A? Listen, in order not to go in specifc details and explanations, the maximum wattage drawn by your card are 37w at full load as reported by techpowerup.com
nVidia recommending a 350W system wattage, they do claim that because they know that cheap garbage PSUs are not rated for the labeled wattage.
I had 9600 GT on my Dell Optiplex 740 connected with a molex to 6 pin adapter and I never had an issue.
PCIE lane are absorbing 75W provided by the PSU, the card doesn't require any external power so their's no even a "rail" required for your card. It will just absorb the power provided by the PSU to the PCIE slot.
Don't worry, just plug it in and enjoy your games.