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Author Topic: Latest G4's running at 1.43Hhz  (Read 19743 times)

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Re: Not so pretty
« on: January 29, 2003, 10:22:10 PM »
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a few points:
1. they do use the extra bandwidth!!! thats why its there!


The system ASIC can, the CPUs can't.

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2. both cpu's share the same bus??? what do you expect! that is how SMP is done! all SMP machines have the CPU's sharing the same data bus!!!!!!!! i forget the name of this architecture, would somebody please help!


Not true, they used to use this Architecture until point to point busses came along.  Athlons multiprocessing have 2 processors on 2 different busses.
PPC 970 will be the same - except it goes up to 32 processors.

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3. the cpu efficiancy CAN/DOES matter when there may be a reletivly low bus bandwidth! memory bandwidth is only important when there is a lot of data to move, otherwise, if there is litte data and more processing of that data, you dont need such a huge bandwidth


True, big caches help here also.
Bandwidth on the other hand fails completely if the task is latency bound i.e. iterating over a big tree structure.  Test a P4 and a G4 on that and you'll find it'll cripple both.

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"a realist", everybody uses that term on a.org!


I'm an unrealist  8-)
 

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Re: Latest G4's running at 1.43Hhz
« Reply #1 on: January 30, 2003, 10:26:33 AM »
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All this talk of Supirior Hardware is really making me sick. I don't care what kind of hardware is realeased if I can stop using Windows, but I'm sure not going to pay through the nose for an old, slow machine.


This debate has been done to death elsewhere no doubt many times over.  Apple may not have the cheapest or fastest hardware but they do have the benefits of integration so it looks good and works out of the box, for most people this is exactly what they want.

But what I increasingly notice is that for most people when you hit close to 1GHz you don't need any more speed.  So, even if PCs are faster most people are not going to notice the difference.

If you need speed things are different.  But I have an 800MHz Athlon and while I've considered upgrading it I've yet to think of a good reason to do it.

For work I use a 700MHz iBook and again it's fine for pretty much everything I do on it.  OS X can be a slug at times but it improves with every update, I don't see the "spinning colour wheel of death" very often these days.