here's a newbee requesting some advice related with this subject :). first of all my system:
Mainboard : ASUS - A8N5X
CPU : AMD Athlon(tm) 64 Processor 3200+
RAM : 2 x 512 MB Kingston PC3200
VGA : 256 MB ASUS EN6600/TD
HDD : 160 GB SAMSUNG SATA II
Optical Drives : Philips SPD2400 (Y5H3) / LG GSA-4163B (A106) / LG GCC-4521B (1.07)
Floppy : 1 Pc
Case : 460 W FEEL HURRICANE
O.S. : Win XP SP2
IDE drivers : nVIDIA nForce4 5.10
* IDE driver version 5.52 (WHQL) available waiting for installation , didn't try the MS IDE drivers as commonly adviced.
4521B combo drive is on the primary master (black connector), SPD2400 secondary master (at the very end connector) and 4163B secondary slave and UDMA 2 - Ultra 33 is available for all optical drives. according to the owner's manual at LG's site 4163B supports up to UDMA 2:
Performance => *Burst(ATAPI) => 16.6 Mbytes/s (PIO Mode 4), (MULTI-DMA Mode 2) 33.3 Mbytes/s (Ultra-DMA Mode 2).
as here mentioned 4521B combo supports up to UDMA 2 too, and acoording to Lite-On's site Lite-On SHW-1635S supports up to UDMA 4 (ther's no any info for the burst rate at Philips' site for SPD2400).
there are two IDE cables shipped with the mainboard, one is with blue/gray (writes on it for HDD)/balck (writes on it for CD-ROM) connectors and one is all with black connectors (for all writes CD-ROM). as stated in mainboards's user guide there are Ultra DMA/133 and 40-conductor IDE cable in package contents. the combo drive is on this cable with blue/grey/black cable and the dvd writers are on the other. my SPD2400 burns DVD+R 8x discs at 8x in >8 min. but 4163B in >10 min. according to Nero Burning ROM 188.8.131.52 write speed for 8x selected SPD2400 reaches 8x and then continues at 7,8x. on the other hand for 8x selected 4163B reaches and writes with max. 5,8x. the burst rates for 8x dvd's tested on Nero CD-DVD Speed 4.51.1 are 25 or 26 mb/s for all drives.
as I understand the cable with colorful connectors is the Ultra DMA/133 and the other one should be the 40-conductor IDE cable mentioned in mainboard's user guide and Ultra DMA/133 is in fact 80-conductor cable. how should I configure my optical drives for max. performance?? my thought is SPD2400 on Ultra DMA/133 as master, 4163B on 40-conductor IDE cable as master and 4521B combo as slave. I read that for UDMA 4 80-conductor cable is required.