@Stagea: sir yung processor ko kasi na Llano 3850 with Radeon HD 6550D, currently im using sapphire 7750. may improve ba sir pa e remove ko ang 7750 then kabitan ko ng 6550 para maging crossfire. thanks
HD 7750 is better than HD 6550D + HD 6670 crossfire. Crossfire relies on profiles to work well with applications, so it does not work in all cases (and it doesn't work for video at the moment). The HD 7000 series also has a slight image quality advantage over the HD 6000 series.
pansin ko lang bakit mas preferred ang ati for ht instead of nvidia?
Because AMD (or ATi) has had the lead in video quality in consumer video for quite some time now and offers better built-in video processing features. AMD's past 3 (and Intel's past 2) GPU generations have offered such great video, in all honesty. Nvidia has been trying to close the gap recently (and they've made quite some progress with the Geforce 500 and 600 series), but they're still behind AMD's and Intel's solutions (particularly with noise/artifact reduction and video conversion).
Nvidia offers advantages in some other aspects, but they're not quite the HTPC darling because they haven't polished their video processing to match the competition. It seems like they're just realizing this market now, as their high end products up until the Geforce 500 series did not support HD Audio bitstreaming.
I like both AMD and Nvidia, and I use both solutions. However, I handle video processing via software when running my Nvidia-based rig to work around Nvidia's video issues.