memory help!!!!! in 990fxa ud3 rev. 1.1

[lrivera1342]

hey all i have spent hours and days trying to get my system to see all my physical memory

presently in the system control panel it states INSTALL MEMORY 12 Gb (USEABLE 7.98)


i have tried the original bios settings and the most current f6k

the cpu is an 8150

windows 7 64 bit
memory i am using corsair vengeance 16gb matched box set cmz16gx3m4a1600c9b  which both websites (gigabyte and corsair) fits?
i tried all in dual modes and it reads 6gb and 3.98 usable?? meaning i tried all configured around 1 and 3   2 and 4 with all modules rearranged

i have not bios tinkering or tampering enabled? i thought i would get 1600 16gb memory without any different setting which i am lost to try 

[MarkJohnson]

Try using F5 BIOS.  The F6K is beta.  only two digit BIOS are stable.  three digit BIOS are BETA TEST only.

Good luck
-=Mark=-

[lrivera1342]

i had bios f5 version and it also the same condition which didnt let me see or use the full 16gb of memory

[MarkJohnson]

Have you set your memory manually in BIOS?

If not, set the timings to 9-9-9-24 2T

In case you're not sure, it is located in the:

MB Intelligent Tweaker (MIT) --> DRAM Configuration

scroll down to Set Memory Clock and change to [Manual]

set Memory Clock to [x8.000] for 1600MHz memory speed.

Then scroll down to DDR3 Timing Items and set to [Manual]

set the next items to 9-9-9-24-2t:

1T/2T Command Timing [2T]
CAS# Latency [9T]
RAS to CAS R/W Delay [9T]
Row Precharge Time [9T]
Minimum RAS Active Time [24]

I have the 970A-UD3 board, but gigabyte is good about keeping the BIOS the same.

Let us know if this works for you
-=Mark=-

[Dark Mantis]

If that doesn't work (which it usually does) then it might be that you have a setting called maxmem set to 8GB. Check here:

Start/run/msconfig/boot/advanced options/maximum memory

[lrivera1342]

thanks BM for the reply ill try that but i sent the board back since it was the same two modules that where reading only half the memory?? #2 and 4 no matter what i put there it just read half>

so when i put brand new memory in slot 1 and 3 it still read only 6 gb and 4 gb usable out of a total (8gb) it seemed odd that the board did everything perfect except show the correct memory ? i either put in 16 gb and it showed 12 with onkly 8 usable or install 8 with only 6 usable ?? ( this is using 4 gb memory sticks