never had to change my default seting in bios for memory before
when you say,2-2-2-5
theres so much more to the dfi cfx3200 mobo as far as settings go
must check out how to apply setting in cfx3200,will see if i can find settings for mushkin pc3500 somewhere
2-2-2-5 are the basic settings most if not all mobos give you.. starting with the CAS..
I believe its listed 2-2-5-2 in the DFI bios, but I haven't looked for a while. Its the main 4 timings CPU-z gives you when you view memory settings.
You never had to change them before because 1, 2, and even 3 sticks should be able to handle it fine, probably even 1T with 3.
4 stick, however fully loads both memory controller channels, and pulling super tight timings is too straining on the memory controller for it to work stably. Original A64's had a hard time even running 4 sticks, a new E6 should be able to run 4 pretty easily, but we are still a long ways from 2-2-2-5 1T with 4x 512.
Memory timings below, from zebbo should be fine with 4 sticks...
Set memory voltage to 2.7V-2.8V and here's some settings:
Tcl: 2.5
Trcd: 3
Tras: 7
Trp: 3
Trc: 7
Trfc: 14-15
Trrd: 2-3
Twr: 2
Twtr: 1
Trwt: 2-3
Tref: 3120
DRAM Drive Strength: 7
DRAM Data Drive Strength: 2
Max. Async. Lat.: 8ns
Read Preamble: 5ns
Idle Cycle Limit: 16
Dynamic Counter: Enable
R/W Bypass: 16x
Bypass Max: 7x