Monitor out of range/going into standby

I have been having problems for the last 3 months or so with my monitor or at least I think it is my monitor. The number one problem that happens is that whenever I play one of my high demand games like skyrim or shogun 2 I will get a message 'out of range' after playing it for 15-30 minutes it varies. Most of the answers on online say it is because I am playing on a higher resolution then my monitor can handle. I must have tripled checked and I am playing on a resolution it can handle. Second thing that happens is sometimes instead of the out of range message it just goes into standby. For this it has been stated it is either a overheating problem or a power supply problem. Now I know for sure my graphics card is overheating but I have the case open and a big fan next to it blowing and that keeps it cool or at least I think it does. I know my graphics card is going to the crapper but I just want to make sure that is what it is before I spend money on something to find out it is another thing. So here are my specs

AMD Phenom IIx4 945
Radeon HD 4870
4g ram
Gigabyte tech motherboard.
Flatron M237WD Monitor
750 power supply

Also if it is my video card what do you guys suggest upgrading to I would like something in the 200's range.

Thank you.
4 answers Last reply
More about monitor range going standby
  1. I am not sure why that is happening
  2. I also recently just got a blue screen after my monitor went 'out of range' I turned it off and on and saw a blue screen after the computer restarted by itself I got this message on boot up

    Problem signature:
    Problem Event Name: BlueScreen
    OS Version: 6.1.7601.
    Locale ID: 1033

    Additional information about the problem:
    BCCode: 116
    BCP1: FFFFFA8008C6A4E0
    BCP2: FFFFF8800424CEFC
    BCP3: 0000000000000000
    BCP4: 0000000000000002
    OS Version: 6_1_7601
    Service Pack: 1_0
    Product: 256_1

    Files that help describe the problem:

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