support question: F3-12800CL6T2-12GBPIS on foxconn x79 prime95 errors

[tworule]

Hello,

I have 3 sticks from the kit F3-12800CL6T2-12GBPIS. I have foxconn x79 board and xeon e5. I use everything on stock. I use xmp settings. I set the dimm voltage at 1,6v ( also tried 1,624v) but the board is overvolting. When I set dimm voltage at 1,6v the hardware monitor on bios reads it around 1,62v-1,63v, When I set th dimm voltage at 1,624v, the hardware monitor reads it around 1,64,v 1,65v. Anyway, I also set core vtt at: 1,12v resulting 1,5v on hardware monitor of bios.

These voltages give me prime 95 blend test around 30 minutes stable and i meet a few rounding errors after 30 mins.

IF I just set the dimm voltage at 1,59v, I instantly receive prime 95 blend test rounding error.
I have latest bios, windows 8 64bit. I have tested each ram with memtest 86+ (v 4.20) and all three sticks together at 1,624 dimm and 1,12v vcore ( resulting 1,65v and 1,15v vcore). No errors and it passes the test once.

So what is your suggestion? I am thnking of manually setting subtimings. Can someone give me manual timings:
my bios has these timings:
TCL:
TRP:
TRCD:
TRAS:
TWR:
TRFC:
TWTR:
TRRD:
TRTP:
TFAW:

.

Should I bumb voltages more?
Thanks

[tworule]

one stick is definitely bad. When I try this particular module, with memtest on the far dimm slots from the cpu, memtest gives out errors. however, the closer dimm slots, memtest passed 1 time without error.
then I installed all modules in three slots (the abd module in the closed slot) and prime 95 blend test was 2hour stable. However, during a game i had bsod. internal memory management.. something..

then tried prime95 blend and gave out rounding error again. any suggestions please? faulty module??

sorry for my english...

[Tradesman]

Do you have the latest BIOS, doesn't sound like the mobo is setting/regulating voltages correctly or PSU is off. Might try a different PSU if one is available or if you can borrow one

[tworule]

I have the latest bios
my psu is ocz 600 watt. which is 3 years old. barely used ( i can say 24 hours per month)
i have gtx690 and ocz revodrive (pcix ssd)
1 sata hdd and 1 dvdrw sata drive
3x120mm case fans
1 90mm case fan
xeon e5 2650

so why do you think psu is problematic? the mobo has voltage check points.i naver used a voltmeter but maybe i should check the voltages
The interesting point is, the "bad module" does not work on the far slots, works only at the closer slots to the psu. I checked with memtest. dont you think the module is faulty? the other two modules work on either slots.

[tworule]

i have no other psu to try...

[Tradesman]

Just from the sounds of what you wrote (voltages not matching up to what you input) that maybe a bad mobo or that the PSU wasn't putting out what was called for, which could be surging or undervolting

[tworule]

ok i ordered a new psu. I will update the information when I receive it. Thanks

[Tradesman]

Keep us updated,