My PC gives fatal erros, bsod, restarts, freezes

Flips2

Prominent
Feb 14, 2017
5
0
520
Hello fellas!
First of all i consider that i necessarily to give info about my configuration, so here it is:
Mobo: Asus M4A77TD PRO
CPU: AMD Phenom II x4 945
GPU: ATI RADEON 5770 (saphire)
RAM: Kingston Hyperx blue 8gb x1
HDD: Hitachi 500 gb, 7200 rpm, 32mb cache
PSU: Antec VP500PC 500W (had other one before Glacial Power 500W).

So here is what firstly happened. I needed to remove one of the HDD's, in order to do that i had to remove the RAM. Here comes the stupid part, after removing the RAM, the next day right when i woke up i tried to put it back in the slot and i put it in the opposite site (dont ask how i managed to do it, i dont know myself...). After i tried turning on my PC obviously i fried my mobo. then i bought one used (due low budget) but it stopped working. Again, due low budget i fixed my old mobo (the one i fried, my brother in law works with that, fixing electronic devices, so we found the wire that was broken and he did his thing) After that the pc ws running with that mobo, and still it it. But i was having those problems in the title, fatal errors, bsod, restarts, freezes and those were happening randomly, after 5 mins or after half hour or 3-4 hours, with a bigger chance to happen if i was multitasking.
I tried reinstalling windows to see if that will fix it, but it didnt. I made sure that i installed all the drivers and optimized the windows settings, but still i was having the same problems.
After a while i tried working on the PC with my friend's PSU and it was working perfectly fine, i was able to surf, play games and download in the same time without any problems at all. So i was sure that it was the PSU and i bought the new Antec PSU but after istalling it the problems were still there.
So i tried removing everything from the case and working it like that and it got more stable (it is still in that condition. I want to note here that beside the other problems something was causing the pc to lose the default settings and after restarting the windows was recovering and i was losing the settings i have made and even saves from games, losing the data from Windows Media Player Library...

Right now the condition its more stable. My pc restarts after i play and i play only league of legends and while i play there is no problem at all, it just that it takes slow to load and highly possible that i will get an error if i do surf in the same time. But when the game ends, right after i get tothe desktop (or sometimes even before that happens) my PC restarts.
Another note: my pc was running slow even before i fried the mobo. Also, the HDD makes that harsh noise while loading the game.

So the question now is: What should i change the mobo or the HDD or should i take SSD and use the HDD just to store things in it. (there are no bad sectors in the HDD, i checked that).
What could be causing the problems?

The ratings in the windows rating system are next: CPU 7.3, RAM 7.4, Aero 7.1, 3D graphics 7.1, Primari HD 5.9.
 

Flips2

Prominent
Feb 14, 2017
5
0
520
its 1600, already decreased it, but i dont know how to set all values, and the bios is giving me some kind of an error, but i can still start my pc. When it starts the CPUZ software sees it as 800MHz... i dont know if it accurate