So, in summation the answer to the main question (because I'm not supertech oriented, and have become confused):
Who's fault is it that Apple doesn't have DDRRAM: Apple or Motorola?
Is Apple's motherboard to blame, or Moto's chip? If it is Moto's chip, then how hard is it to get the DDRRAM interface on a current design (74xx) chip?
<strong>So, in summation the answer to the main question (because I'm not supertech oriented, and have become confused):
Who's fault is it that Apple doesn't have DDRRAM: Apple or Motorola?
</strong><hr></blockquote>
Well, both, sort of.
Motorola would have to give the G4 more FSB bandwidth, and once this is done, Apple would have to modify their core logic to support both the faster FSB and DDR memory. Both steps would have to be done, 'cos each one is basically useless without the other.
Also, it could be argued that it is mainly Motorola's fault for not developing a DDR MPX bus (as Apple could easily build a DDR memory controller to compliment it), or that it is mainly Apple's fault for not pressuring or investing in Motorola enough so that they develop a MPX bus. After all, Apple needs to take responsibility for their machine's performance.
Maybe Apple is just looking out for their customers, and they figure that PC133 memory is best because it's cheaper for Mac users to upgrade their RAM! That way they can easily load up their old Macs with RAM to run OS X well, instead of being forced to drop big bucks on a new POWERmac.
Yes, an OEM has to consider availability of upgrade options for end users, but it is now at the state where DDR is widely available and around only 1/3rd more expensive than SDR RAM.
<strong>While RDRAM latency is horrible, DSP algorithms are the ones which will usually do well with it. Signal processing usually works on long sequential streams of data, which is what you want in a high latency system. Its all the other algorithms out there that do badly on high latency memory.</strong><hr></blockquote>
Oops, I guess I wasn't thinking straight for awhile there.
And thanks for the info on Rambus' anti-competitive practices.
Comments
Who's fault is it that Apple doesn't have DDRRAM: Apple or Motorola?
Is Apple's motherboard to blame, or Moto's chip? If it is Moto's chip, then how hard is it to get the DDRRAM interface on a current design (74xx) chip?
SDA
<strong>So, in summation the answer to the main question (because I'm not supertech oriented, and have become confused):
Who's fault is it that Apple doesn't have DDRRAM: Apple or Motorola?
</strong><hr></blockquote>
Well, both, sort of.
Motorola would have to give the G4 more FSB bandwidth, and once this is done, Apple would have to modify their core logic to support both the faster FSB and DDR memory. Both steps would have to be done, 'cos each one is basically useless without the other.
Bye,
RazzFazz
Barto
[ 02-01-2002: Message edited by: Barto ]</p>
<strong>While RDRAM latency is horrible, DSP algorithms are the ones which will usually do well with it. Signal processing usually works on long sequential streams of data, which is what you want in a high latency system. Its all the other algorithms out there that do badly on high latency memory.</strong><hr></blockquote>
Oops, I guess I wasn't thinking straight for awhile there.
And thanks for the info on Rambus' anti-competitive practices.
Barto