I still don't see a 90nm (970fx) 1.8ghz g5 working in powerbook at any great speed. I see the bus cut down to ~200mhz... I see a processor that will suck battery life out so quickly... why does everyone want a g5 so bad... why wouldn't dual g4's be sufficient? Why wouldn't dual-core g4's be sufficient? I'd much rather have 2 slower chips then 1 fast, battery killing chip.
Because it is the only PPC processor that offers substantially improved performance over a G4. Personally, I don't care about 64-bit addressing in a notebook as long as it is not possible to physically install more than 4 GB RAM.
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Why wouldn't dual-core g4's be sufficient?
A dual core G4 would be sufficient if it was available now or in the beginning of the next year. However, it is not. Worse yet, it won't go into the sampling phase before one year from now passes.
Because it is the only PPC processor that offers substantially improved performance over a G4. Personally, I don't care about 64-bit addressing in a notebook as long as it is not possible to physically install more than 4 GB RAM.
Without 64bit, fast bus, and more than 4gb memory.... g5 isn't much quicker... definitely not worth the loss of battery life, heat, etc.
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A dual core G4 would be sufficient if it was available now or in the beginning of the next year. However, it is not. Worse yet, it won't go into the sampling phase before one year from now passes.
That's why.
Why can't dual processor g4's work? Too much power? A year from now when freescale already has samples? Thats a long time for the testing phase isn't it?
Without 64bit, fast bus, and more than 4gb memory.... g5 isn't much quicker... definitely not worth the loss of battery life, heat, etc.
A Powerbook G5 would use the same architecture as the iMac G5 except for using low power components. It'll have the 1/3 FSB ratio and 128 bit memory bus support, I predict.
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Why can't dual processor g4's work? Too much power? A year from now when freescale already has samples? Thats a long time for the testing phase isn't it?
Freescale doesn't have samples of any of their 90 nm processors. No samples of the 7448, PowerQuicc 3, 8641 and 8641D. They probably haven't taped out and only exist as computer simulations. No test hardware means they haven't begun the testing phase of any of these processors. Actual hardware samples probably won't come out until Q2 05, with dual core samples 6 months after that (2H 05).
The dual core G4's won't be shipping until 1H 2006. Just look at slide 41 of the SNDF presentation.
A Powerbook G5 would use the same architecture as the iMac G5 except of using low power components. It'll have the 1/3 FSB ratio and 128 bit memory bus support, I predict.
I thought they had to turnt he FSB way down for less heat. could be wrong though.
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The dual core G4's won't be shipping until 1H 2006. Just look at slide 41 of the SNDF presentation.
Well that blows. I was hoping dual core would be out around March. Do they really need to do it at 90nm? What's wrong with 130nm?
I thought they had to turnt he FSB way down for less heat. could be wrong though.
The iMac G5 is using a 1/3 FSB ratio. That's not way down. That's going from 1/2 to 1/3. By the time a 8641 ships and the iMac G5 is at 2+ GHz, it's 1/3 FSB will be just as high as the 8641's integrated, ondie MPX bus. So it is fast enough for iMac usage. Maybe they did it for heat dissipation problems, who knows, but I'm 100% sure that they did it for feature differentiation to the Power Macs.
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Do they really need to do it at 90nm?
For Powerbooks and other mobile uses, yes.
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What's wrong with 130nm?
The 130 nm 7447A in the current Powerbooks burns 30+ Watts max. A dual core variant would burn about 60+ Watts max.
Comments
Originally posted by emig647
why does everyone want a g5 so bad...
Because it is the only PPC processor that offers substantially improved performance over a G4. Personally, I don't care about 64-bit addressing in a notebook as long as it is not possible to physically install more than 4 GB RAM.
Why wouldn't dual-core g4's be sufficient?
A dual core G4 would be sufficient if it was available now or in the beginning of the next year. However, it is not. Worse yet, it won't go into the sampling phase before one year from now passes.
That's why.
Originally posted by PB
Because it is the only PPC processor that offers substantially improved performance over a G4. Personally, I don't care about 64-bit addressing in a notebook as long as it is not possible to physically install more than 4 GB RAM.
Without 64bit, fast bus, and more than 4gb memory.... g5 isn't much quicker... definitely not worth the loss of battery life, heat, etc.
A dual core G4 would be sufficient if it was available now or in the beginning of the next year. However, it is not. Worse yet, it won't go into the sampling phase before one year from now passes.
That's why.
Why can't dual processor g4's work? Too much power? A year from now when freescale already has samples? Thats a long time for the testing phase isn't it?
Originally posted by emig647
Without 64bit, fast bus, and more than 4gb memory.... g5 isn't much quicker... definitely not worth the loss of battery life, heat, etc.
A Powerbook G5 would use the same architecture as the iMac G5 except for using low power components. It'll have the 1/3 FSB ratio and 128 bit memory bus support, I predict.
Why can't dual processor g4's work? Too much power? A year from now when freescale already has samples? Thats a long time for the testing phase isn't it?
Freescale doesn't have samples of any of their 90 nm processors. No samples of the 7448, PowerQuicc 3, 8641 and 8641D. They probably haven't taped out and only exist as computer simulations. No test hardware means they haven't begun the testing phase of any of these processors. Actual hardware samples probably won't come out until Q2 05, with dual core samples 6 months after that (2H 05).
The dual core G4's won't be shipping until 1H 2006. Just look at slide 41 of the SNDF presentation.
Originally posted by THT
A Powerbook G5 would use the same architecture as the iMac G5 except of using low power components. It'll have the 1/3 FSB ratio and 128 bit memory bus support, I predict.
I thought they had to turnt he FSB way down for less heat. could be wrong though.
The dual core G4's won't be shipping until 1H 2006. Just look at slide 41 of the SNDF presentation.
Well that blows. I was hoping dual core would be out around March. Do they really need to do it at 90nm? What's wrong with 130nm?
Originally posted by emig647
I thought they had to turnt he FSB way down for less heat. could be wrong though.
The iMac G5 is using a 1/3 FSB ratio. That's not way down. That's going from 1/2 to 1/3. By the time a 8641 ships and the iMac G5 is at 2+ GHz, it's 1/3 FSB will be just as high as the 8641's integrated, ondie MPX bus.
Do they really need to do it at 90nm?
For Powerbooks and other mobile uses, yes.
What's wrong with 130nm?
The 130 nm 7447A in the current Powerbooks burns 30+ Watts max. A dual core variant would burn about 60+ Watts max.