I'm looking to upgrade my video card. I'd like to run Battlefield 3 at 1680x1050 smoothly on the lower settings. I'm also hoping to run Crysis 3, Black Ops 2, and some other future games on lower settings (though I know this will be less likely as time passes ).
I currently have a Galaxy 8800 GT PCIe 2.0 video card. I've got an old Asrock 939Dual-SATA2 mainboard with a 3800+ (edit) X2 dual core CPU. The board has a PCIe 1.0a slot, which currently hosts the 8800 GT without issue.
I was thinking of upgrading to either a Radeon 7770 (PCIe 3.0), Radeon 6850 (PCIe 2.1), or Geforce FX 560se. I'd like the Radeon 7770 in particular, since it only has an 85 watt TDP. I know the PCIe standard is supposed to be backward compatible, but I'm still worried about the newer cards working with my board. Has anyone out there successfully run one of the above cards, or a close family member (7850, 6870, 560 ti etc ) in the Asrock 939Dual-SATA2 board?
I've got a Corsair 450 watt power supply, which has 2 PCIe power connectors (I've read its internals are used for 500 watt power supplies from other manufacturers).
I know I'm more CPU bottle necked at this point, but I don't have the money for a full CPU/board/memory upgrade right now.
The system hosts 2 pci usb controller cards, a pci Soundblaster Audigy 2 soundcard, and four hard drives, two SATA and 2 IDE. One of the SATA drives is currently working intermittently since the system experienced a brown out; with all drives enabled, the system will soon hang, though I can use the system fine with the problem drive disabled, and boot into the problem drive with the others disabled. I don't know if the brownout fried one of my SATA controllers, something else on the board, the drive itself, or my power supply. This is an additional concern with upgrading the video card, as I'm afraid putting a card with two high of a power requirement into the system may break the power supply or fry something else
Thank you for your advice ahead of time.

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