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