Video performance on integrated GPU

[HipHoper]

Hello All :O)

I am trying to upgrade my Athlon 3000+ (939) HTPC video performance.
Currently I am using integrated GPU (Nforce 430 - Geforce 6100) and 32" LCD screen.
I tried the system with Geforce 7300 and 8400GS but the video enhancement of Divx/Xvid videos is minor.
Don't you think that this cpu is powerful enough the display Divx/Xvid falwlessly ?
It works usually fine, But what makes me uncomfortable is when a square block is moving (Like camera slowly moving in a room or a street), That i see that the blocks doesn't move smoothly....
Regarding picture quality...I also tried DVI to HDMI cable (My lcd supports HDMI), But quality was the same. I thought I'll notice colors and contrast improvments like in monitors, But I guess I was wrong...
I'd like to hear you opinion about this subject.
Thank you

[CeeBee]

That has nothing to do with your video capabilities, it's quality lost during encoding...
Only way to increase the quality is to encode the original movie at a higher bitrate, at the expense of more storage space required.
Edit: One more thing that can be tried is to encode at variable bitrate (VBR), usually a 2-pass encoding gives better results - this way more bits are allocated for fast-changing frames resulting in smoother picture. But of course there is a trade-off here too, and that is more time required for encoding...

[HipHoper]

Thanks Bee for the clarification. The thing is that I DO see improvment on the stronger GPU, So I guess it's not all encoding fault.
I think it also have to do that the picture is displayed on a big LCD rather than a monitor ?

[Platypus]

Image flaws will certainly be more noticeable to the eye on a physically larger screen, which will also possibly have a lower resolution than a monitor. That means not only are the screen pixels physically larger, but the interpolation that the display has to do to match the video image resolution to the screen resolution, has less pixels to play with.

[HipHoper]

LOL @ The End Plat :O)

If the resolution is lower at the bigger LCD, Doesn't that mean that it will be dispalyed FASTER ? (Less proccessing power needed for lower resolutions ?) I use mostly 800X600 and sometimes 1024X768 on the bigger screen and play via VLC player most of my videos since it is very easy to change aspect ratio of videos...

[lightclouds]

If the resolution is lower at the bigger LCD, it should be faster.

[Shard92]

Don't forget however that lcd's have a native resolution and that anytime you display at a different resolution then the lcd has to emulate the resolution... which of course can lead to errors or funny effects...

[HipHoper]

I didn't took it into the account, But when the resolution is improper. You get the "out of range" message on most displays (Or a funny smell of something burning :O)

[NooNoo]

Not with lcds... they just look sort of shimmery.

[HipHoper]

Nice to know....So it might be my cooking ..... :O)

[NooNoo]

I already explained about corn flakes and frying pans..... D'Oh!