The voltages look OK, at idle. As for the PSU, the issue is what they put out under stress which there is very little way to tell. CPU temps sound OK, for a chip like yours, the GPU temps sound slightly high, I think for a 560 TI. The card should be able to take those temps, but in my opinion 80C is pushing the limit. Maybe you could add some air flow to your case and set a custom fan profile with Precision X. That is what I do with my card and it will help a lot.
Also, did you follow Koolkat's instructions for creating a small memory dump? Make sure the minidump file is there or create one. It would really help if we had some debugging info to direct us to what the problem is. Without that we are going to have to proceed as if it was a hardware problem, which is may very well be. If you did and still are not getting memory dumps, go further down in the tutorial She linked to and use the regedit file posted there to make sure the registry knows to create the dump.
To troubleshoot hardware problems, is very time consuming and can take a lot of hours. I know very well what a pain it is. I have been there myself several times. Lets start with running memtest86+. Follow the link in the tutorial which will lead you to memtest86+. Be sure to get the + version. There are 2 companies which make the test, memtest86 and memtest86+. The + version is, in my opinion, the best and most accurate. It needs to run for 8 passes and will probably take quite a few hours. Each pass consists of 10 tests, each testing something different. Each pass tests a different thing also, so it takes 8 passes to do a complete test. If you get errors during the test you can stop it, the test has failed. It is best to run the test overnight. This should explain how to run the test.
http://www.sevenforums.com/tutorials/105647-ram-test-memtest86.html
Also, if you have anything overclocked, set everything back to default values. Also, please download and install
Ungine Heaven Basic edition (free). It is a graphics card benchmark and will really push your graphics card. Be sure and set on screen monitoring in Precision to show at least the GPU temps and fan speed. Set a fan profile before you run the test.
If you don't already have it, download and install
CPUz and post screenshots of the Mainboard tab, memory tab, CPU tab and the SPD tab.