[mythtv-users] Asus M4N78 PRO GeForce 8300 and 1080p

[Jongi]

On 27/03/2010 22:00, Kevin Ross wrote:
> Jongi wrote:
>> Hi,
>>
>> I am building a secondary FE for my bedroom. However I will be going 
>> with a 720p 32" LCD. I have some 1080p content on my master BE/FE 
>> which is connected to a 50" Plasma. The motherboard I have on the 
>> secondary FE is  Asus M4N78 PRO GeForce 8300 Motherboard. If the 
>> M3N78-VM is anything to go by that board should handle 720p without 
>> issue using vdpau. However the M3N78-VM I have used to struggle at 
>> times with 1080p content (I ended up getting a 9500GT).
>>
>> Is there a way to have the onboard "process" the video as 720p? Will 
>> that add to the load and make things worse?
>>
>> Regards
>> Jongi
>
> I have two motherboards with GeForce 8200.  They work perfectly fine 
> for all of the content I throw at them.  Their only limitation is they 
> can't do the Advanced 2x deinterlacing.
>
> Since these motherboards use AMD CPU's, most AMD CPU's slow down the 
> memory controller at the same time they slow down the CPU during idle 
> time.  Since VDPAU doesn't exercise the CPU at all, it stays idle, 
> causing the memory controller to stay at a slower speed, starving the 
> GPU.  This will cause stuttering of 1080p videos.
>
> If this is indeed the problem you are having, then you have two choices:
>
> 1. Set the minimum CPU speed to about 1.8 GHz (or turn off CPU 
> frequency scaling altogether) using the cpufreq-utils package, or
> 2. Upgrade to a CPU that doesn't do this (Athlon II or any Phenom).
>
> I did option 1 on one of my FE's and option 2 on the other.
>
> Hope this helps!
> -- Kevin
>
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Thanks. I'll give option 1 a try.