On Thu, 2005-03-24 at 16:11 -0800, Brad Templeton wrote: > On Thu, Mar 24, 2005 at 04:57:49PM -0500, Donavan Stanley wrote: > > On Thu, 24 Mar 2005 16:38:45 -0500, PAUL WILLIAMSON > > <[EMAIL PROTECTED]> wrote: > > > 2.8 has been suggested as the lowest processor > > > you'd want to go with for HD. I'm not sure > > > if the Pundit would do that... > > > > > > My Celeron 2.5ghz sits at 80% when watching 1080i... > > > > The CPU quotes floating around the net are either out of date, for > > Windows, or just flat out wrong. > > There was an improvement between .16 and .17 that allowed slower > processors to play HDTV. Many things can play a role, including > if you do deinterlacing, and how much spare capacity you want to have. > > My experience is I wouldn't want to run at 80% saturated because other > things can pop up on the system and cause stutters. Live TV seems > more succeptible too. For example, even though commercial scans are > run niced, they make the system more prone to stutters if you have a > slim margin. I find that even my P4-3ghz-hyperthreading system can > still stutter on occasion when additional load pops up, though generally > it has more than enough. > > xvmc support has been constantly improving. Some have had it working > for a while, others have had problems but the problems are being slowly > ground out. This changes the CPU equation as well. > > There is some debate over how much better Pentiums are than Athlons > at mpeg decode, and why they are better, but they are a bit better. > > Reasons include: > a) mpeg decode takes more advantage of intel pipelining > b) hyperthreading does its job well here (not on celerons of course) > c) Intel CPUs run at ~ a 35% faster clock speed than AMD of the same > number. Sometimes the size of your clock does matter. > > Idle times report major benefits for intel but are misleading. However, > an improvement of the range of 15% is almost certainly real, and possibly > much more. > > Intel CPUs run a bit hotter due to their faster clock. AMD CPUs are faster > than Intel on other tasks even if slower on the particular task of mpeg > decode. Of course mpeg decode is what you care about here!
Chips hate Heat. Heat must be Moved Away. Moving lots of Heat makes Noise, or costs a Lot, or is Esoteric. Noise is Incompatible with watching TV (unless you're watching MTV). P4 chips make Lots of Heat. AMD chips make less Heat (nowadays). -- ----------------------------------------------------------------- Ron Johnson, Jr. Jefferson, LA USA PGP Key ID 8834C06B I prefer encrypted mail. "He that would live in peace and at ease must not speak all he knows or all he sees." Benjamin Franklin
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