Overclock.net › Forums › Components › Memory › 32GB RAM & Sabertooth 990FX R2 & Vishera instability.
New Posts  All Forums:Forum Nav:

32GB RAM & Sabertooth 990FX R2 & Vishera instability.

post #1 of 5
Thread Starter 
Hello guys,

I'm having huge issues with my 4 * F3-14900CL10-8GBXL memory modules. My board will only boot @1066 DDR speed when they are all installed (using the MemOK feature). But running 4M Super Pi will trigger rounding errors most of the time.

I do not think the modules themselves are faulty. I did run MemTest for about 2 hours and no error was found. I did not waited until the whole MemTest was complete, I admit. Additionally, I'm having no issues when only two modules are in. Using 1503 BIOS.

Voltages are these:
- CPU: 1,375V
- CPU-NB: 1,2V
- DRAM: 1,5V
- NB: 1,1V
- NB-HT 1,2V

Played around increasing all voltages except the CPU one, but no success on reliably passing Super Pi 4M. Still have the feeling that increasing the NB voltage to around 1,2 helped somewhat, does it seem legit?


So I would appreciate any suggestion. Still hoping there's a magic switch somewhere in BIOS or elsewhere that will make it all just work. By the way, noticed in BIOS that ECC is enabled. Could that have a negative impact on things? Thank you all for reading, anyways.
BlackBird
(19 items)
 
  
CPUMotherboardGraphicsRAM
Fx 8350 Asus Sabertooth 990FX R 2.0 Powercolor 6850 SC3 F3-14900CL10S - 8GBXL 
Hard DriveHard DriveHard DriveOptical Drive
Samsung SSD 840 Pro Western Digital Caviar Blue  Seagate ST3000DM001 Won't bother to check 
CoolingCoolingCoolingCooling
Noctua NH-C14 3 * NF-S12B FLX 2 * NF-P14 FLX Antec Big Boy 200mm 
OSOSMonitorPower
Windows 8 OpenSuse 12.2 Dell U2400 Seasonic Platinum 860 
CaseAudioAudio
Antec P193 V3 Asus Xonar Essence STX 2 * Fostex PM2 Mk II 
  hide details  
Reply
BlackBird
(19 items)
 
  
CPUMotherboardGraphicsRAM
Fx 8350 Asus Sabertooth 990FX R 2.0 Powercolor 6850 SC3 F3-14900CL10S - 8GBXL 
Hard DriveHard DriveHard DriveOptical Drive
Samsung SSD 840 Pro Western Digital Caviar Blue  Seagate ST3000DM001 Won't bother to check 
CoolingCoolingCoolingCooling
Noctua NH-C14 3 * NF-S12B FLX 2 * NF-P14 FLX Antec Big Boy 200mm 
OSOSMonitorPower
Windows 8 OpenSuse 12.2 Dell U2400 Seasonic Platinum 860 
CaseAudioAudio
Antec P193 V3 Asus Xonar Essence STX 2 * Fostex PM2 Mk II 
  hide details  
Reply
post #2 of 5
I'd try to increase the CPU-NB voltage slightly to help it cope with have 4 modules. While Vischera does support the memory frequency at 1866 Mhz, 4 modules will always be more load, so to speak, than 2.

Also, make sure that is the correct voltage for the modules, and that the timings are correct.
post #3 of 5
Thread Starter 
Upped CPU/NB to 1.225. The memory modules themselves are supplied at 1.55V (spec says 1.5V).

The BIOS has selected 8-8-8-20-27 (@2T) timings which are more conservative. Tried both 1066 and 800(!) speed and superPi 4M still fails.

It still looks like one or two modules are faulty. This is because SuperPi 2M and bellow will always pass. Seems that only when more memory is used in benching problems start to arise. Though as I said, I cannot reproduce this behavior with two modules.
BlackBird
(19 items)
 
  
CPUMotherboardGraphicsRAM
Fx 8350 Asus Sabertooth 990FX R 2.0 Powercolor 6850 SC3 F3-14900CL10S - 8GBXL 
Hard DriveHard DriveHard DriveOptical Drive
Samsung SSD 840 Pro Western Digital Caviar Blue  Seagate ST3000DM001 Won't bother to check 
CoolingCoolingCoolingCooling
Noctua NH-C14 3 * NF-S12B FLX 2 * NF-P14 FLX Antec Big Boy 200mm 
OSOSMonitorPower
Windows 8 OpenSuse 12.2 Dell U2400 Seasonic Platinum 860 
CaseAudioAudio
Antec P193 V3 Asus Xonar Essence STX 2 * Fostex PM2 Mk II 
  hide details  
Reply
BlackBird
(19 items)
 
  
CPUMotherboardGraphicsRAM
Fx 8350 Asus Sabertooth 990FX R 2.0 Powercolor 6850 SC3 F3-14900CL10S - 8GBXL 
Hard DriveHard DriveHard DriveOptical Drive
Samsung SSD 840 Pro Western Digital Caviar Blue  Seagate ST3000DM001 Won't bother to check 
CoolingCoolingCoolingCooling
Noctua NH-C14 3 * NF-S12B FLX 2 * NF-P14 FLX Antec Big Boy 200mm 
OSOSMonitorPower
Windows 8 OpenSuse 12.2 Dell U2400 Seasonic Platinum 860 
CaseAudioAudio
Antec P193 V3 Asus Xonar Essence STX 2 * Fostex PM2 Mk II 
  hide details  
Reply
post #4 of 5
have you tried testing each module individually?

See if you can run each stick individually, at 1866Mhz, and bench/ stress test.

If you can, you know this issues lies elsewhere, either in your IMC or an issue with your motherboard.

If you can't, obviously you've found which module is faulty at it's rated speed + voltage. RMA time!
post #5 of 5
Thread Starter 
Indeed it was that simple. One of the modules just didn't want to POST @ 1333.

The others work fine @1866. Can't get rid of the broken stick thought, as I had removed those ugly heatsinks already.
BlackBird
(19 items)
 
  
CPUMotherboardGraphicsRAM
Fx 8350 Asus Sabertooth 990FX R 2.0 Powercolor 6850 SC3 F3-14900CL10S - 8GBXL 
Hard DriveHard DriveHard DriveOptical Drive
Samsung SSD 840 Pro Western Digital Caviar Blue  Seagate ST3000DM001 Won't bother to check 
CoolingCoolingCoolingCooling
Noctua NH-C14 3 * NF-S12B FLX 2 * NF-P14 FLX Antec Big Boy 200mm 
OSOSMonitorPower
Windows 8 OpenSuse 12.2 Dell U2400 Seasonic Platinum 860 
CaseAudioAudio
Antec P193 V3 Asus Xonar Essence STX 2 * Fostex PM2 Mk II 
  hide details  
Reply
BlackBird
(19 items)
 
  
CPUMotherboardGraphicsRAM
Fx 8350 Asus Sabertooth 990FX R 2.0 Powercolor 6850 SC3 F3-14900CL10S - 8GBXL 
Hard DriveHard DriveHard DriveOptical Drive
Samsung SSD 840 Pro Western Digital Caviar Blue  Seagate ST3000DM001 Won't bother to check 
CoolingCoolingCoolingCooling
Noctua NH-C14 3 * NF-S12B FLX 2 * NF-P14 FLX Antec Big Boy 200mm 
OSOSMonitorPower
Windows 8 OpenSuse 12.2 Dell U2400 Seasonic Platinum 860 
CaseAudioAudio
Antec P193 V3 Asus Xonar Essence STX 2 * Fostex PM2 Mk II 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Memory
Overclock.net › Forums › Components › Memory › 32GB RAM & Sabertooth 990FX R2 & Vishera instability.