80 wire cable is same width like 40 wire except when you look at it, the ribbon wires look much smaller. You can count them.
This cable is for new drives.
But if you did not installed burner by yourself, most likely it will be correct.
DMA (direct memory access) is setup for IDE channel.
You can find it in Device Manager, if you open Properties of your IDE Primary or Secondary channel and than click on Advance Setting.
Now some more questions.
How old is this drive?
When it started to happen?
What do you mean by “local dvds”?