PSU replace/upgrade

I have a HP Pavilion Elite e9180f, with a i7-920 processor on a Truckee UL8E mother board with LGA 1366 socket; 6 240-pin DIMM and PCI-e slots, Geforce GTS 250 6pin Graphics card, 460w Delta Electronics PSU model # DPS-460-DB A. I need to replace/upgrade PSU. However I can't find any information on whether my computer has a standard or proprietary power supply. I appreciate any information or recommendations regarding my issue.
 
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