I have GIGABYTE EX-38 DS4 mobo with q9450, earlier i had ASUS A7N8X mobo which had nforce 2 chipset with AMD Athlon Xp 2800+ 2.0 Ghz proc . I have this WD IDE Hard Disk , i tested it with HD Tune Software on both pc's . On old mobo read speed was 75 Mb/s and now it is 25 Mb/s . Why the decrease ? is it becasuse i have IDE burner on the same IDE cable ? that was not being used during this test .