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IWETHEY Home / IWETHEY Board / Apple Forum / what, 64bits?
Post #181,023
by Steve Lowe
10/26/04 3:50:32 PM
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New what, 64bits?
--
Steve
Post #181,029
by inthane-chan
Picture of inthane-chan
10/26/04 4:15:22 PM
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New Dual channel memory, you git. :)
Let me know when Mac OS X is fully 64 bit, too - how long have we had 64 bit x86 Linux?

(And just in case I'm being too obtuse - I actually would *LOVE* to buy a dual G5 PowerMac - just can't justify it to the beancounter.)
All I want for my birthday is a new President!
Post #181,030
by Steve Lowe
10/26/04 4:18:57 PM
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New you and me both! :-)
--
Steve
Post #181,033
by pwhysall
Picture of pwhysall
10/26/04 4:28:03 PM
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New Give me a shout when Linux is fully 64-bit, too :)
Note the difference between “64-bit” and “64-bit clean”.

ObVMSButEvenNotAllThatIs64BitPlug.

Peter
[link|http://www.debian.org|Shill For Hire]
[link|http://www.kuro5hin.org|There is no K5 Cabal]
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Post #181,041
by SpiceWare
10/26/04 5:01:47 PM
Reply
New single channel 128 beats dual channel 64
    The iMac G5 has 3 modes depending on how the memory is installed

  • single channel 64 bit - one RAM slot filled

  • dual channel 64 bit - both slots filled w/mismatched memory

  • single channel 128 bit - both slots filled w/matched memory
From [link|http://www.ppcnux.de/modules.php?name=News&file=article&sid=4092|here](German - read the , in the numbers as . )

Xbench Memory Test iMac G5 1,8GHz - in MB/s
Konfiguration 64Bit - 256MB 128Bit - 1GB 2x64Bit - 1,25GB
System Fill 1664,16 2231,49 1625,25
System Copy 750,36 1041,32 861,25
Stream Copy 1217,79 1615,10 1255,89
Stream Scale 1250,43 1657,52 1251,27
Stream Add 1439,19 1781,15 1423,78
Stream Triad 1461,27 1794,59 1441,01

The results for single channel 64 and dual channel 64 are very close, and they both are trounced by single channel 128 bit access.

I haven't kept up with memory technology, does the consumer PC have 128 bit memory access like the consumer Mac?
Darrell Spice, Jr.                      [link|http://www.spiceware.org/cgi-bin/spa.pl?album=./Artistic%20Overpass|Artistic Overpass]\n[link|http://www.spiceware.org/|SpiceWare] - We don't do Windows, it's too much of a chore
Post #181,044
by admin
Picture of admin
10/26/04 5:18:04 PM
Reply
New They're doing something wrong with their dual-channel then.
Or what you're calling 128-bit is the same thing as nVidia's dual channel.

Dual channel on my nVidia nForce2 is quite a bit faster than single channel 64-bit.
Regards,

-scott anderson

"Welcome to Rivendell, Mr. Anderson..."
     Looks like paired memory best for iMac G5 - (SpiceWare) - (7) - Oct. 26, 2004, 10:50:01 AM EDT
         We've had this for at least four years on x86... - (inthane-chan) - (6) - Oct. 26, 2004, 11:44:43 AM EDT
             what, 64bits? -NT - (Steve Lowe) - (5) - Oct. 26, 2004, 03:50:32 PM EDT
                 Dual channel memory, you git. :) - (inthane-chan) - (4) - Oct. 26, 2004, 04:15:22 PM EDT
                     you and me both! :-) -NT - (Steve Lowe) - Oct. 26, 2004, 04:18:57 PM EDT
                     Give me a shout when Linux is fully 64-bit, too :) - (pwhysall) - Oct. 26, 2004, 04:28:03 PM EDT
                     single channel 128 beats dual channel 64 - (SpiceWare) - (1) - Oct. 26, 2004, 05:01:47 PM EDT
                         They're doing something wrong with their dual-channel then. - (admin) - Oct. 26, 2004, 05:18:04 PM EDT

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