Well, I believe it must be the power supply, I just ran a memory test for about 2 hours and the memory stood firm
So, I guess it must be the power supply.

By the way, can someone tell me what the correct power settings would be for a AMD Thunderbird 800 MHz, or where I can find this settings, I've tries AMD.com, but the info there is quite a mess for my poor knowlidge.

Yes, I am no hacker, just a user with a eager desire to have some answers.

By the way, if you need some English to Portuguese translations I would be glad to help, after all, that could be the only way to help you due to my sparce knowlidge.

Thank you all

pipas_