Hello All,
Apple just released there new Macs with DDR SDRAM support. Does that
mean there is a new G4 that supports DDR SDRAM ? Apple has to be using a new
G4 because they claim a 1.25GHz clock speed and a 166MHz FSB clock rate.
Any body heard anything about this?
Just currious,
Conn
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Conn Clark
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Electronic Systems Technology Inc. www.esteem.com
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"Conn" == Conn Clark [off-list ref] writes:
Conn> Apple just released there new Macs with DDR SDRAM
Conn> support. Does that mean there is a new G4 that supports DDR
Conn> SDRAM ? Apple has to be using a new G4 because they claim a
Conn> 1.25GHz clock speed and a 166MHz FSB clock rate. Any body
Conn> heard anything about this?
For "G4" PPC chips (really Motorola 74xx) the RAM controller is on a
separate companion chip. For example Marvell's Discovery 2 companion
chip supports DDR and works with Mororola 74xx and IBM 750 chips.
However, the fastest Motorola 7455 chips I've heard of are 1 GHz with
a 133 MHz bus. Perhaps the new Macs are using CPUs available only to
Apple?
- Roland
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On Fri, Aug 16, 2002 at 10:02:40AM -0700, Roland Dreier wrote:
However, the fastest Motorola 7455 chips I've heard of are 1 GHz with
a 133 MHz bus. Perhaps the new Macs are using CPUs available only to
Apple?
Well, once someone gets one, we might find out what the PVR is. I
suppose it's possible there's new 7455's that are just a tad faster, or
maybe it's a new rev (7456? with all the previously known errata
fixed..)
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Tom Rini (TR1265)
http://gate.crashing.org/~trini/
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