Any of the lightweight DEs will help you out: LXDE (which is in the throes of being ported to QT, and I don't currently recommend), XCFE, which has been improved, and MATE, which is a fork of GNOME 2, and is pretty lightweight, and the DE I prefer. No slowdown of games have I seen.

And your English is just fine; it remains the hardest second language to learn, with the possible exception of Turkish.

Thanks, I will try 'em, but just in case you think my PC is old here are my specs:
GTX 660 Ti
I7 - 3770k
8 GB RAM

Quoting: oldrocker99And your English is just fine; it remains the hardest second language to learn, with the possible exception of Turkish.

English is easy, the problem is that I don't like to use/write/speak it :D for me is the easiest language.

Thanks for the reply.

I'm using MATE desktop for over a year now. It's pretty light on resources, very much bug free and stable overall. Cinnamon has also come along nicely in recent months and it's a great candidate for my 2nd DE of choice.

I never had any game freeze my DE. I've used XFCE, KDE, i3, heck even the god awfull gnome3 doesn't freeze.

Might be a problem not related to your DE.

I'm just using Ubuntu Unity, no problems with it, and it's the most supported.

Well thanks everyone for the replies.
I've prove every DE you guys told me, failed stability in all, a game freeze (ex: CSGO, Chilvary, etc.) and I have to do hard reset. Tried other distros (Debian, OpenSUSE and Ubuntu, witch I can say that Ubuntu was the more "stable" ) and the problem still there. I changed my games location from my HDD to another.
My PC components are good, no high voltage or over heat.
I don't know what to do. I have thinking on prove Gentoo or Arch but I don't like the rolling release model.
What you guys think?

PS: Really thankfully for all your help, thanks again :)

Quoting: GuestTry XFCE I have to no problems to play games with it on debian 8 and whats the driver version of your nvidia driver? Try the lastest stable from here http://www.nvidia.com/object/unix.html

Sorry man didn't saw your reply, I tested from the oldstable driver to the beta one and the problem still there.

Thanks.

Quoting: GuestCould be a bad power supply unit, too.

No, 850 Watts for a system that only consumes 650-570 watts.
Thanks anyway

If the problem persists regardless of OS, I'd still put my money on faulty hardware. Doesn't need to be overheating or anything like that, but games and other resource intensive software do expose problems you don't see under normal desktop use. Sometimes the culprit can be really hard to pinpoint, and I speak from experience. The last time this happened to me it took literally months to finally solve. (Turned out that one of the cores in my i7 had stopped working properly for some mysterious reason, resulting in instability when said core came under load.)

Quoting: Modofokus

Quoting: GuestCould be a bad power supply unit, too.

No, 850 Watts for a system that only consumes 650-570 watts.
Thanks anyway

That doesn't mean the power supply cannot be faulty.

QuoteThat doesn't mean the power supply cannot be faulty.

Well sorry if it was a short answer, but my power supply don't have problems. I tested it no more than 1 week- 5 days ago (voltage, house-to-power energy).
Sorry if I couldn't explain myself.

But I missed one thing to ask.
I have my OS on a SSD (going to 1 year old) and my games on 2 HDD (some age). Can be that a problem with the stability?