DDR/SDR CAS Select

JBT

Lifer
Nov 28, 2001
12,094
1
81
in my bios setup there is a option for "DDR/SDR CAS Select" saying 2.0/2 or 2.5/3 which should i put it on? right now i have SD 256mb PC133 kingston memory installed. I also have Crucail 256 DDR pc2100 not installed though because i get memory dumps errors when i install it I'm not surewhy I change the jumpers and voltage selector Maybe im doing something wrong though? what setting should I out it on and if it was on the wrong setting would that make the DDR ram not work?
I also have another question about the setting "Dram performance" i have the options of normal,slow, fast, ultra, ultra 2, and fail safe which setting should i put that on? right now i have both on the default settings "2.5/3" and "normal" if I change either what will be the effects? either bad or good? thanks for any help I can get.