Xfx radeon 4850 problems running dual monitors

I hooked up a 24" samsung syncmaster and a 23" acer monitor to my xfx radeon 4850 card and at first it worked as it should. I could spread my windows to each monitor and watch videos in one and read whatever in the other. Then the card started crashing. I tried to use the catalyst control center to no avail. The mobo accelerater hardware does not recognize the xfx card. I tried smart doctor but it did not recognize either. Now if I pull a window into the secondary monitor I lose my mouse and must wait till it loads up. I am using an Asus P6T mobo with 12 gigs of memory and a core i7 processor. A corsair 750 psu. Should not be robbing me of power. The card has 512 megabytes of DDR. It worked well with one monitor. If I was to upgrade the card to fix this problem does anyone have any suggestions as to the best card in the 300 dollar range.
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  1. What i7 are you currently using and do you have a preference to what brand you would like and chip maker? Also could you fill out your system specs for me please.

    System Setup:
    CPU: i7 (fill in the blank)
    Memory: 12 gigs (Tri channel?)
    Motherboard:
    PSU: Corsair 750w (TX,HX?)
    Video Card: 4850 however WiP
  2. I suppose I would consider an Asus graphics card so I could use the EPU six engine. It does not recognize the xfx card so I use ccc. I also have turbo V. Am not familiar with any of this stuff. Just want to plug and play.

    ASUS P6T Motherboard
    Intel Core i7 920 Processor BX80601920 - 2.66GHz, LGA 1366, 4.8GT/s QPI, 8MB L3 Cache,
    2 Corsair XMS3 TR3X6G1600C8 6GB Memory Module - PC12800, DDR3, 1600MHz, DIMM
    Radeon HD 4850 512MB GDDR3 PCI Express 2.0 x 16
  3. Okay so it does look like you are using a tri channel configuration and its a x58 chipset. Best card in that range for you hmm I'm not sure I would say a 660Ti, or a 7870 for you. Beyond that I would think you would want to do some overclocking to your CPU.

    And ASUS isn't a bad way to go brand wise the 660Ti is stronger then the 7870 as a note.
    7870
    http://www.newegg.com/Product/Product.aspx?Item=N82E16814121649&Tpk=asus%207870
    660Ti
    http://pcpartpicker.com/part/asus-video-card-gtx660tidc22gd5
  4. Thanks, I took your advice and ordered the 660. They have a couple of variants of that model. I got this one.

    ASUS GTX660 TI-DC2O-2GD5 GeForce GTX 660 Ti 2GB 192-bit GDDR5 PCI Express 3.0 x16 HDCP Ready SLI Support Video Card
    http://www.newegg.com/Product/Product.aspx?Item=N82E16814121656
  5. No problem. So you went with the factory overclocked one right on. It should serve as a great card for you. Hope you are happy with it. I have a 670 which is the 660Ti's bigger brother. You should let me know how it goes :)
  6. Asus 660 is working fine. Pushing a 23 and 24 inch screen. The old card xfx 4850 was working great on a single monitor when I pulled it. Try to use two and it would slow as soon as I pulled a tab to the other screen.
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