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What will G5 do(or mean) for the Powerbooks?
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Forum Regular
Join Date: Sep 2003
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I know everyone is ready for the G5 chipset in the powerbook line. I am curious as to what will it be more capable of than the current chipset? Is G5 64bit oriented? Will L2 cache be bumped up to 2MB?
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Am I ready for the Mac? I want a 60G iPod!!!!!
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Posting Junkie
Join Date: Jun 2003
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Originally posted by sbc:
I know everyone is ready for the G5 chipset in the powerbook line. I am curious as to what will it be more capable of than the current chipset? Is G5 64bit oriented? Will L2 cache be bumped up to 2MB?
2 MB L2 cache? A big L2 cache might be nice (esp. since memory speeds in the G5 PowerBook would be relatively slow) but it's unlikely. It seems Apple might just use the 970FX, which has a 512 KB L2 cache (which is what the 970 in the Power Macs also has).
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Dedicated MacNNer
Join Date: Dec 2003
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Well, nothing really other than the ability to scale further, and the 64 bit bus for a higher memory limit. From what I have heard/seen, the G4 and G5, clock for clock, are about equal; but the G4 is not able to scale to the speeds that IBM can push the G5.
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15 inch MacBook Pro 2.16 GHz, 2 GB RAM, 7200 RPM 100GB HDD.
Dual 2.5 GHz Power Mac G5, 1 GB RAM, 250 GB HDD, ATI Radeon X800XT.
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Mac Elite
Join Date: Mar 2003
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The clock speed better by high because those new Dothans with 2MBs cache are the best CPUs in the world. I would love for the mobile G5 to match them at anything.
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Posting Junkie
Join Date: Jun 2003
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Originally posted by KraziKid:
Well, nothing really other than the ability to scale further, and the 64 bit bus for a higher memory limit. From what I have heard/seen, the G4 and G5, clock for clock, are about equal; but the G4 is not able to scale to the speeds that IBM can push the G5.
From what I've seen, in certain things the G4 and G5 are similar clock-for-clock (ie. integer), but in other things the G5 absolutely destroys the G4. Most specifically, for floating point, the G5 is a computing monster, while the G4 hobbles along on crutches.
In fact, Motorola/Freescale refuses to publish any sort of FP benches for the G4 precisely because it so damn slow. They're quick to publish integer benchmarks though, since at that they're respectable (for the clockspeed).
Also, more memory addressability isn't going to be all that useful. The G4 can already address 4 GB. It's not as if you're going to be putting more than 4 GB RAM in a PowerBook in the useful lifetime of the laptop.
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