No I haven't tried that one, I will try it tomorrow. Anyway I'm back to 700/900 and no more random crashes when exiting to XMB, the games I've been testing are Castlevania Lords of Shadows, Dark Souls 2 and The Last of Us.
There's a gain of 8-9 fps in intense moments in Lords of Shadows so...
I tried 750/900 and the games do appear to work fine but when I try to exit to XMB the PS3 randomly crashes and I have to unplug it because not even long pressing the on/off button worked
Guys I'm new to this and I just want to make sure I do this right before I brick my PS3. So I have a CECH-2504A what is the most stable OC I can go for other than the standard 600/750?