Technically from a specifications point of view it would work,depending on the rest of your PC.Although i'm going to have to agree with everyone else and reccomend you buy a new PSU.A GTX465 can be quite a power hog and you would want nice clean efficient power for it.
Intresting how their marketing the GTX465 now.Selling the card for $50 less but it's more powerful than the GTX460.
For a system with a single GeForce GTX 465 graphics card a minimum of a 550 Watt or greater power supply with a +12 Volt continuous current rating of 38 Amps or greater and with at least two 6-pin PCI Express supplementary power connectors is recommended.
Your Raidmax HYBRID SERIES RX-530SS power supply unit with its maximum +12 Volt continuous current rating of 30 Amps is unable to properly power a system with a single GeForce GTX 465 graphics card.
You are in a bind and any thing less than a gtx460/465 isn't going to cut it at that ress and at the same time your psu is holding you back. Either settle for something that uses less power or dig deeper and get the card you want along with a new but better psu.