DMA Problem!

Hi, I can’t understand why, but I have 3 optical drives:

1- DvD-Writer ASUS 1608P (Pioneer 109) Primary Master
2- CD-Writer ASUS 5232AX Secondary Master
3- DvD-Reader ASUS E616-P2 Secondary Slave

The DMA settings are, rispectively:

1- 66
2- 33
3- 100

The two cables are EXACTLY the same, and these are the fastest configuration possible…


And, how can I reach 133 for all 3 drives?

Thx a lot!