I have a motherboard with the Intel 815EP chipset, and i have a ?

[TheNeck]

the chipset supports ata 100 hard drives. but when i install a ata 100 hard with a cdrom connected on the same ide channel the hard drive reads ata 33 but if i disconnect the cdrom from the ide cable, it reads ata 100. why is this? thanks for the help

 

[ROJAS]

This is true. If you install a slower device (ata33, ata66) on the same IRQ14 or 15, your fastest speed will be to the speed of the slower device. If you move the cdrom to the secondary ide (Irq15) then your hard drive will run at the ata 100 speed. You could buy a Promise controller board that will handle 4 additional ides and put your slower devices (cdrom, zip) on it.

 

[rommel]

yeah if you can get every thing on its own channel...reserving the blue eide ata 100 primary channel for hard drives unless your using a controller card...but just a note...if you are using win98se or earlier make sure you download the chipset utility from intel to make sure winX is seeing your 815ep...also you can download the ultra ata drivers from intel as well.