From my very first test above:
Hitachi as master CPU 8x 12%
LG as slave CPU 8x 40%
I haven´t winzip so I couldn´t opened Nero InfoTool.
I made following Nero CD Speed test:
1. Unmarked DMA in Device manager.
Master Hitachi DVD-ROM. Start 11,35x, End 14,31x, CPU 8x 45%
Slave LG GCE. Start 10.97x, End 10,89x, CPU 8x 70%
My conclusion: DMA was turned on before this test. Right?
2. LG GCE as Master alone in the Secondary IDE. Marked DMA in Device manager.
Start 21,71X, End 50,89X (nice!) CPU 8X 6%
3. Master LG GCE as Master. Start 21,79x, End 50,91x (nice!) CPU 8x 7%
Slave Hitachi DVD-ROM. Start 11,36x End 14,08x CPU 8x 42%
Does the performance allways decrease when a driver set as a slave?
Can I increase the performance for the slave Hitachi DVD-ROM to 24x?