One of my older computers has a 365-watt power supply that, for various reasons, cannot be replaced with a new power supply. I would like to upgrade the graphics card in that computer, but all the acceptable cards I can find demand the extra 6-pin PCI Express power connector. After using a few power supply calculators, I've come to the conclusion that the additional 6-pin power connector would push my little power supply over the edge (not to mention my PSU lacks a 6-pin connector anyway).
So, would it be possible to create my own 6-pin PCIe connector that plugs into a regular wall outlet? I assume it would be possible with some horrid freakshow of power adapters tangled together, but I don't know where to start.
Some Wikipedia background info about the power connector I'm referring to:
PCI Express cards are allowed a maximum power consumption of 25W (×1: 10W for power-up). Low profile cards are limited to 10W (×16 to 25W). PCI Express Graphics 1.0 (PEG) cards may increase power (from slot) to 75W after configuration (3.3V/3A + 12V/5.5A). PCI Express 2.1 increased the power output from an x16 slot to 150W so that some high-performance graphics cards can be run from the slot power alone. Optional connectors add 75W (6-pin) or 150W (8-pin) power for up to 300W total.