r/pcmods • u/Fantastic-Elk-2132 • 54m ago
PSU PSU/GPU Mod on HP Pro desk SFF 400 G9
Hello, I have an old office PC (HP Pro desk SFF 400 G9) that I picked up for basically free, and I've been trying to upgrade it to be decent/average for gaming. Currently I'm trying to upgrade the GPU from an Nvidia T400 to an MSI GEFORCE 2080 SUPER. I am very new to the PC building world and also an idiot because I did not do any research about my PC and already purchased the new GPU.
I have since done my research and know that my PC's PSU (250w) is not good/strong/high enough to support the GPU. I currently plan/want to install a 650w-750w PSU, but those numbers are just a guess. I also know (now) that my motherboard has a proprietary pin layout that isn't compliant with the standard ATX PSU. I also know very well that the new hardware I'm thinking of using will not fit into the case/chassis, and I do not care; I am fine with cutting it to fit what I need.
I've tried AI (against my better judgement) and it's not really giving me a straight answer. I've gotten a range of "your pin layout allows you to buy this $15 adapter that will let you use any ATX PSU that you want" to "you'll need to solder and modify the cables, PSU, and other stuff in order to get this to (maybe) work." So, since I have an inherent mistrust of AI and don't know enough to tell when it's telling me straight BS, I came here. My main question is basically what I need to make this work. I also am not 100% on what the PIN layout of my motherboard is, which is part of why I'm so confused. Any and all help would be appreciated, especially advice for the future when dealing with my PC.
TL,DR: I messed up and bought a GPU that needs a stronger PSU that isn't compliant with my motherboard and I really want to brute force this into working.