The laptop will appear (and be) slower in some tasks, CPU and memory and bus being equal, because the video accelerator is weaker and the hard drive and optical drive are slower.
Depending on what you hope to be doing with the machine, that's a perfectly reasonable tradeoff to gain portability.
The weakest point of a laptop is the HD, the second point is the graphic chipset. The third point is the lack of L3cache (but there is no L3 cache in the LCD i mac or powermac G4 800.
<strong>Yes, hard drive speed and graphics, but I was considering actual processing power, not overall speed.</strong><hr></blockquote>
In that case the speed will be exactly equal. I think the confusion (not you) came from the fact that in the X86 world the chips designed for laptop and deskstop have a slighty different design (for example the pentium 4 M is slower than is desktop counterpart).
But in the Apple world the two chips are the same, Apple just use the latest generation of chips in their laptop in order to have the less watt consomption.
<strong>But in the Apple world the two chips are the same, Apple just use the latest generation of chips in their laptop in order to have the less watt consomption.
]</strong><hr></blockquote>
So the new speed bumped 800mHz G4 Powerbook at MWTokyo, should be roughly the same speed as the 800 G4 Tower (less HD speed)?
I recently saw a rating of all available macs on some benchmark suite and hands on test. No available Powerbook could outrun even a 450 Mhz G4. The 677PB was just a couple of points ahead of the 450PM, and the 466PM was faster (barely)than every available PB config.
667PB ~= 466PM
Good. But not great. This should partially explain OSX's slight sluggishness on the Books. Mind you, those were all the standard RAM configs when 256 was standard. A gig of RAM might have a more dramatic effect on a laptop than a desktop, as the laptops have much slower HDD performance (even the 5400rpm laptop drives have less real throughput, slower access, seek, read and write times than a same speed desktop drive)
Comments
(I'm not an expert, so I don't really no anything. Just seems logical to me...)
Depending on what you hope to be doing with the machine, that's a perfectly reasonable tradeoff to gain portability.
But yeah, I know it sounds logical that same specs should mean same speed.
Somehow I remember some of the G3 iMacs were faster than equivalent G3 iBooks.
<strong>If a laptop and a desktop both have an 800 MHz G4 processor, a 100 MHz Bus and 512 MB of RAM, why would one be slower than the other?
(I'm not an expert, so I don't really no anything. Just seems logical to me...)</strong><hr></blockquote>
Hard drive speed.
<strong>Yes, hard drive speed and graphics, but I was considering actual processing power, not overall speed.</strong><hr></blockquote>
In that case the speed will be exactly equal. I think the confusion (not you) came from the fact that in the X86 world the chips designed for laptop and deskstop have a slighty different design (for example the pentium 4 M is slower than is desktop counterpart).
But in the Apple world the two chips are the same, Apple just use the latest generation of chips in their laptop in order to have the less watt consomption.
[ 03-08-2002: Message edited by: powerdoc ]</p>
<strong>But in the Apple world the two chips are the same, Apple just use the latest generation of chips in their laptop in order to have the less watt consomption.
]</strong><hr></blockquote>
So the new speed bumped 800mHz G4 Powerbook at MWTokyo,
Basically the 7440 is a 7450 sans the L3.
To edit in RealTime in Final Cut Pro, you need a desktop with 500 MHZ, or a Labtop with 667 MHZ.
667PB ~= 466PM
Good. But not great. This should partially explain OSX's slight sluggishness on the Books. Mind you, those were all the standard RAM configs when 256 was standard. A gig of RAM might have a more dramatic effect on a laptop than a desktop, as the laptops have much slower HDD performance (even the 5400rpm laptop drives have less real throughput, slower access, seek, read and write times than a same speed desktop drive)