Hey there, Valter. Yes I would be more than happy to give you a hand setting up your config. Are you wanting to keep the stock settings, or are you interested in overclocking? Either way, I can help you out. Let's start with your GPU temps. . Are you running SLI? If so, you're card on top will be getting some heat off the one below. Either way it would be good to bring this down into at least the 70's. What type of case and fans are you running? A couple things to check without me knowing to start are; 1. Is your power supply fan right side up, or upside down. Having it upsidedown if your case has vents for it on the bottom can help lower your temps a few degrees. 2. Having the most up to date drivers for your GPU. 3. Making sure your fans on the bottom and side of your case are bringing air in and the ones on the top and back are pulling air out. 4. Some games that use Mantle seem to cause more problems than they solve on entry level GCN GPU's like 270's, 270x's, and should never be used with Nvidia cards so turn it off with your Nvidia. Games with PhysX should turn that option off when used with ATI/AMD cards. 5. Origin sucks. try closing it if possible before game boot or through task manager afterwards. Uplay sucks. Try doing the same. Sometimes these programs are required to run in order to save or get your achievements, or play multiplayer. There are workarounds. Generally, though these programs are giving your cpu more of a drag than your gpu. 6. Make sure your GPU is up to the task if you are running multiple monitors in these games. These are all things to try, but it may also be that you GPU is just from a bad batch.
Also, if you do not want USB's at all on when system is turned off you need to go to advanced options in your bios, and turn ON ErP energy saver function. PM me for the rest of the details for setting up your bios for optimal performance with or without overclocking. Goodluck!