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New G4s: Apollos or not ...?
- Thread starter abe
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I think so...
The Apollo is the only G4 chip that can make it to 1Ghz so I'm guessing all of them are. When you think about it, the way chips are made, any chips that fail at a given clock speed is slowed down until it doesn't fail and then it's rated at the lowest speed it can go to without failing. It stands to reason that motorola are more likely to be supplying chip in 933 and 800Mhz speeds from the same batch as the 1Ghz chips, purely for cost reasons, I imagine using the 7450 in the 800Mhz model would be a waste of production time too, seeing as 867Mhz is the highest clock speed the G4+ could go to.
I'd be pretty interested to see how the 800 and 933Mhz G4s compared to the old 867 and dual 800Mhz G4s actually. I mean the 7455 has a higher floating point score than the older 7450 chips, infact I think it might mean that Mhz for Mhz an Apollo is faster than the 7450 at everything because if it's higher MIPS score on the Motorola site.
For instance the original G4 (7400) had a MIPS rating of 917 @ 500Mhz, the new Apollo chips have a MIPS rating of 2280 @ 1Ghz, that effectively makes the Apollo the equivelent of a 1,243Mhz 7400 G4.
obviously with the original G4 having a 4 stage pipeline and a 1Mb 2:1 rated cache compared to the 7 stages pipeline, 256K 1:1 rated cache and 2Mb 4:1 rated cache on the 7450 and above, I think it all adds up to the 1Ghz G4 probably being twice the speed of a 500Mhz G4 and no more.
hope I've not gone off on too much of tangent there
The Apollo is the only G4 chip that can make it to 1Ghz so I'm guessing all of them are. When you think about it, the way chips are made, any chips that fail at a given clock speed is slowed down until it doesn't fail and then it's rated at the lowest speed it can go to without failing. It stands to reason that motorola are more likely to be supplying chip in 933 and 800Mhz speeds from the same batch as the 1Ghz chips, purely for cost reasons, I imagine using the 7450 in the 800Mhz model would be a waste of production time too, seeing as 867Mhz is the highest clock speed the G4+ could go to.
I'd be pretty interested to see how the 800 and 933Mhz G4s compared to the old 867 and dual 800Mhz G4s actually. I mean the 7455 has a higher floating point score than the older 7450 chips, infact I think it might mean that Mhz for Mhz an Apollo is faster than the 7450 at everything because if it's higher MIPS score on the Motorola site.
For instance the original G4 (7400) had a MIPS rating of 917 @ 500Mhz, the new Apollo chips have a MIPS rating of 2280 @ 1Ghz, that effectively makes the Apollo the equivelent of a 1,243Mhz 7400 G4.
obviously with the original G4 having a 4 stage pipeline and a 1Mb 2:1 rated cache compared to the 7 stages pipeline, 256K 1:1 rated cache and 2Mb 4:1 rated cache on the 7450 and above, I think it all adds up to the 1Ghz G4 probably being twice the speed of a 500Mhz G4 and no more.
hope I've not gone off on too much of tangent there
Read This
This article from eWeek mentions Apollo
http://www.eweek.com/article/0,3658,s%253D25201%2526a%253D22082,00.asp
This article from eWeek mentions Apollo
http://www.eweek.com/article/0,3658,s%253D25201%2526a%253D22082,00.asp
That eWeek article says directly that the 933 and 1GHz are Apollos. What about the 800? Rumors-wise, it's important to know if they are just clearing out old 800s while they test a 1.2GHz Apollo...
The other interesting detail is that the mac IIcv mentioned in the article cost $2950 when it came out, and that was 10 YEARS AGO. (Just in case anyone really doubts that we are getting better value for money now...)
The other interesting detail is that the mac IIcv mentioned in the article cost $2950 when it came out, and that was 10 YEARS AGO. (Just in case anyone really doubts that we are getting better value for money now...)