how to speed up ac3 its lagging a bit. my config is amd a6-3500 apu with radeon tm hd graphics 2.10ghz and max turbo 2.40ghz, internal grafix is 1.75gb and external is xfx ati radeon hd 5450 1gb ddr3 and 4gb ram 3.00 usable
set every thing on low, resolution 1080p and start from upgrading texture quality while checking the performance and so on until you will reach the best quality
/ performance compromise
you need to upgrade that gpu that you have, a 5450 is almost on par to what the what the intergrated apu has to offer. if you hop on ebay you can find some decent cards (i picked up a 5670 for $20) which is leaps and bounds better.
set every thing on low, resolution 1080p and start from upgrading texture quality while checking the performance and so on until you will reach the best quality
/ performance compromise