PPC vs x86 speed/performance comparions?

[Piru]

If I have a 1.8GHz G5 Mac and a 2.0GHz P4, running the same OS (Say a flavour of Linux), which would yield better performance?

Depends on what you do, but G5 should beat P4 at the same clockrate at many tasks.

The thing is P4 is stoneage x86 technology these days. Take modern core2 cpu .. it runs 1333 fsb (and new ones 1600) and it runs circles around any ppc. Runs cooler, too.

[Piru]

Is there any chance of the sparc (any version of it) running Amiga OS

no

[Piru]

@downix

Would be an easy job  especially if one were to use the migration toolchain Sun developed back when they introduced the Sun-4

You obviously would need the source code to do that. It won't happen.

[Piru]

@dammy

What video cards are you using in the two machines?

What gfxcard has to do with H.264 encoding or renderings?

[Piru]

@dammy

Oh SOOOOOOOOO sorry that I ASKED a question.

Oh please.

[Piru]

@StormLord

I think in INTEGER mulithreaded operations we must be at about the same speed, but in video encodings like H.264 and renderings I'm about 2x faster..
maybe thats because of 4 altivec units that my machine has..(2 altivecs per cpu)

That's it, most likely. AltiVec (especially in 7447/8) is still better than vector units in x86 class machines. Dual G4 is pretty formidable with sw that has good altivec support. The more CPU bound the task is, the better G4 and altivec does (that is G4 doesn't have ultrafast frontside bus and altivec can easily get starved, x86 are tons faster with highly memory intensive tasks).

[Piru]

@Hattig

assist in encode.

Oh? Got any links to documentation?

[Piru]

Ok, the "any modern (current generation) graphics card" referred to decoding only (which I wasn't questioning).

It's still great to see that encoding is getting HW assisted, now, too. Finally some good use for those expensive 3d cards.. ;-)

[EDIT] Hmm tried to google a bit (but failed), got any links to some nice video encoder software that ulitizes the 8800GT for encoding? [/EDIT]