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Yes, correct. If your GPU supports opengl 2.0, it'll run just as fast as an 8800 ultra.
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For very demanding materials (read: "birds scene" ) 2.6GHz is minimum and that's with very efficient CoreAVC codec. If You go for socket 775 Dual Core Intel, than 2.2 or 2.6 doesn't make any difference as You buy lowest clocked one and OC it to 2,6-3,0GHz with no problems (except You must have good motherboard)
XBMC somehow benefit not low end graphics in some cases because it was already reported that for example integrated GF 7050 was bottleneck and as I read recently, also 7150 sometimes happen to be to less.
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d4rk
Team-XBMC Developer
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rodalpho, that's not entirely accurate, you will definitely benefit from a better GPU. For example, the Nvidia 7050, even though it supports OpenGL 2.1, cannot (currently) handle the bicubic video upsampling filter, whereas the Nvidia 7600 can.
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Is that right? I guess that explains why tslayer could play the birds clip smoothly on a slower CPU with his 8600GT.
I can play everything 1080p except the birds clip smoothly, so I don't see any need to upgrade from my 7150, so no big deal. But good to know.
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Wish these boards had edit enabled...
Yes, onboard solutions work fine. My nvidia 7150 is integrated. According to d4rk's post just before yours the answer is yes, you'll see some benefit from a higher-end videocard. How much benefit is up for debate.