[mythtv-users] Upgrade old or cut my losses and buy new?
yan at seiner.com
Tue Mar 6 17:29:22 UTC 2007
Yan-Fa Li wrote:
>On 3/4/07, Yan Seiner <yan at seiner.com> wrote:
>>I'm in search of HD... My cheapie Sempron 3000 CPU just won't do HD.
>>It's clocked at 1.8 GHz and has a 128K L2 cache.
>>I can get an Athlon 64 3000+ that will fit the mobo for $60; it has 512K
>>L2 cache and is clocked 20% faster than the Sempron, at 2.00 GHz.
>>Or should I go for a new AMD Athlon 64 X2 3800+ system? That comes in
>>at $400. The computer in question will only be used as a HD frontend;
>>it has no other function, so if I can get good assurance an upgraded CPU
>>will push my TV at 1366x720p I don't want to spend the money. But then
>>again, I don't want to spend $60 only to have a system that still
>As a reference point, I just built a new frontend for HD:
>X2 3800 (65w) AM2
>ASUS M2NBP-VM MB with integrated Nvidia 6100
>1GB DDR2 (2x512) 800MHz
>Connected via Gig E
>nvidia driver 1.0.9746
OK, thanks everyone for a great discussion. I think I may be on to
something; the working machine, which has an Athlon XP 2000+, does HD
just fine with 60% CPU usage. It also uses agpgart...
The non-working machine, the one with the Sempron, locks up when trying
to use agpgart; I have to set option "nvagp" "0" or "1".
On looking at the modules, the working machine loads the agpgart and the
via_agp modules; it has a KT400 chipset.
The non-working machine loads agpgart and amd64_agp. The kernel docs
This option gives you AGP support for the GLX component of X using the
on-CPU northbridge of the AMD Athlon64/Opteron CPUs. You still need an
external AGP bridge like the AMD 8151, VIA K8T400M, SiS755.
So.... First of all, do Semprons have an on-CPU northbridge? Second of
all, should I be loading the via_agp module as well?
Or should I be loading *just* the via_agp?
In other news, I now have the box to the point where it uses 15% CPU
when showing HD. But.... there is a severe stacatto stutter when
using XvMC; about 1/4 second of pause, then video, then pause.... I've
done all of the nfs tweaks, tried different network cards, etc. When
using the mpeg decoding, I get good sound, but the picture runs in slow
motion and then jerks, on about a 2 second cycle.
The good news is that I have now learned enough to say with confidence
that if everything works right, you can get HD with an Athlon XP 2000+.
OTOH, I can also say that you can't get it on an Sempron 3000....
More information about the mythtv-users