Hi,
I just put this together yesterday (650W PSU, i5 2500K, 500 and 1TB Sata II, optical sata, stock intel cooler) and I can't get system to come up if I use memory slots 3_1 and 3_1 per the manual for dual channel, nor 3_2 and 3_4 slots. If I put em in channel B as a pair (or single) the system posts and comes up. I have set optimized defaults in BIOS as well as ACHI for the controllers and disabled full screen logo. Default memory speed showed 1333 vs 1600 (voltage at 1.5v).
I thought I had been able to run 2 sticks in Channel A previously but now it just constantly resets during POST. I ran 2 sticks in channel B for 6 passes overnight with zero errors. Currently running other pair in channel B memtest (latest vis USB bootable setup). I don't understand why manual says to use the _1/_3 or _2/_4 slots for dual channel when the system won't even POST with them in that setup (either pair of modules). And now why it won't post with 2 in channel A slots. I am thinking this mobo is defective. I had gotten Win7 Home Premium installed yesterday with 2 sticks in channel B and system updates and some apps installed (av/malware/cpu-z, coretemp). Temps sit in upper 20's to low 30's at idle, ran a short Prime95 (64bit version and temps climbed into the 60's/low 70's range (not all case fans running (top/front intake/one next to PSU atm not connected).
BIOS is showing F9 and there is an F10 for this rev. board but @BIOS said there was no update available and on website doesn't appear to be one I need.
So a) why can't I run the modules in _1/_3 or _2/_4 slots, b) why won't it POST with all 4 installed and c) why will it not POST with sticks in channel A only? I am thinking this mobo is defective or there are some settings I am missing in BIOS. Also, why didn't it set to 1600 by default without me having to go into BIOS to set XMS profile which changed the speed to 1600 1600 vs 1333 1600 when I manually set the multiplier to 16.0?
Thanks in advance, I hope I don't have a dud for mobo....and the corsair HX650 PSU I bought may be dead too, using my older Thermaltake 650 till I can troubleshoot the Corsair.
Mike