Video card or monitor problem?

Moga Stefan

Honorable
Aug 27, 2013
3
0
10,510
i have a a little problem. Sometimes my pc doesn't recognize my monitor. I have a Phillips 224E monitor. My windows is 7 on 64 bits. My graphic card is a NVIDIA GeForce GTX 650 Ti BOOST (2048 MB) . But some times when i turn on my computer my computer does not recognize it. Is set on default! Like this http://i43.tinypic.com/2lcxq2d.jpg I meant that i can set it on full HD on 1920X1080 but the hole screen is surround by a black area. Something like this http://i39.tinypic.com/nffu3s.jpg Could it be the power source? When i enter in the video card menu it show me this http://i40.tinypic.com/24mu96o.jpg and this http://i42.tinypic.com/35387sh.jpg
I tried to connect my monitor with a DVI cable and my desktop wet full screen but not on full hd (that was expected) but monitor was still on default. Please help me!
 

Moga Stefan

Honorable
Aug 27, 2013
3
0
10,510
Until 5 days ago never had this problem! I've played every night.
Oh! and something else i didn't mentioned : The power source is from the previous computer. It's a Vantec ION2+ VAN 600W .
And i have this motherboard GIGABYTE GA-P75-D3, Intel B75, LGA1155, DDR III, PCI-E 3.0, SATA III, USB 3.0