Hello, I seek to change my psu, and having seen Tom's Hardware PSU list and the PSUs available near me, I have as options two XFX PSUs: XFX 650W XTR Full Modular 80+ Gold, and XFX 850W XXX Pro Modular 80 Plus Silver. The price difference is pretty small, so I don't care about that aspect. I do care about the heat and noise generated by the PSU. I understand the first one is tier 2, and the second one is tier 1, but I still wanted to ask. If you have another suggestion beside these two xfxs let me know, but my main question is about them in particular. Thanks in advance.