You should be able to fit in a either a HD6850, HD6870 or a GTX460 but your processor could be a potential bottleneck for these cards and your PSU is of unknown origins.
I am wondering if that PSU is really 480W true power but you've used a GTX260 on it that requires 2x6pin PCIE power then I guess it is possible to upgrade to the GC that I mentioned above.
|