Hi, I am planning on upgrading my graphics card and, as a result, I need to replace my PSU in my computer, which is an HP d4100e desktop, AMD 64 x2 My current PS is 350w. I am looking at a 500-600w PSU. I contacted HP with regards to this and they replied with the following: "The internal component are tested and designed to work with the rated power supply, We do not recommend the user to upgrade the power supply unit as it may result in hardware damage of Motherboard. It is highly recommended to install the same rated power supply unit in case of replacement." Am I screwed? Or, is this just their way of covering their butts in the highly unlikely chance that something goes wrong? Any help would be greatly appreciated!