Sun Baked said:
Not really the advantage of the G5 over the G4 is bandwidth (aka GB/s).
I must not have clearly stated that I knew that, then.
The System Controller is running quite hot, and the G5 elastic-Bus is designed to run at a 2, 3, and 4x multiplier. A 1.8GHz G5 in a PowerBook running a 450MHz or 600MHz FSB has better bandwidth than the G4 at 167 MHz -- but the biggest benefit is reduced power/heat at the lower clock cycles.
You must not have ever read one of my posts where I argue with people who say that the G5 should be out now,
now, now. One of my main points in those arguments is that a full-speed G5 ASIC is going to be quite a bit hotter than the G4, and that cutting the FSB down is going to kill a lot of the performance advantage. However, I'm curious where you're getting your numbers on the lower heat at lower clock cycles claim.
The single channel DDR memory would mean the current 2 DIMM slots stay and you wouldn't need to toss 2 DDR DIMMs every time you upgrade memory. 4 DIMMs is asking a lot of a portable, and if it comes with DDR2...
Single-channel DDR would elminate the ability to read and write on the same clock cycle, though, wouldn't it? I've always understood that the reason the processor could do that is that it taps one back going up and the other going down.
And it's not modifying the motherboard, but design of a new chipset for single CPU machines and portables.
I also understand that. It sounded like you were saying Apple only had to modify the dual-processor board.
jahutch said:
I assume you know nothing about PC laptops.
Strike One.
First off, this "luggable" nonsense has been false since the Centrino was released.
Strike Two.
My Centrino machine is the same weight and nearly as thin (like 1.25") as an Apple Powerbook - in short, it is every bit as portable. Second, the screen on my laptop absolutely wipes the floor with the junk Apple puts on its laptops - mine is a 14" screen that does 1400x1050 resolution. You'd have to get a lunch tray 17" powerbook to get that kind of screen space from Apple (and for me, screen space was really the deciding factor).
You know, I've got a nearly three year old iBook that's got a screen that's just as sharp as the day it was manufactured, and while I'd like a slightly larger resolution, it works just fine. Often, PC laptops come with cheaper displays that can technically go larger, but which look awful when they do so. My coworker's Dell Inspiron is a wonderful example of a brick of a computer that cost about the same as my iBook, only it runs worse.
Dell Inspiron 8600
Pentium-M 1.5ghz
XP Pro with Plus! and Digital Media
512MB RAM 1-DIMM
ATI Radeon 9600 Mobile 128MB
4x CD/DVD-R with RecordNow! and MyDVD Deluxe
80GB HD
Dell Wireless 1450 Internal 802.11
Dell TrueMobile Blutooth
McAffee Security Center with 1yr Enrollment
Dell Jukebox Plus
Dell Picture Stuiod with Photo Album Premium
Cost: $2,686
Apple PowerBook 15"
Motorola G4 1.5ghz
MacOS X 10.3.3
512MB RAM 1-DIMM
ATI Radeon 9700 128MB
SuperDrive
80GB HD
Airport Extreme
Blutooth
iLife
Cost: $2,599
So, in conclusion, both the Centrinos and Powerbooks have advantages and disadvantages. Either is a solid choice in my opinion. I just had to respond though, because I get the feeling people haven't touched a PC laptop since the centrinos were released - so they love to talk about what junk they are.
I have. So what?