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2x Corsair Vengeance (4GB) DDR3 - problems

post #1 of 6
Thread Starter 

Here's what i got :

Phenom X2 550BE (3,1 ghz) @ Phenom X4 B50 (3,624 mhz)
Gigabyte GA-MA770T-UD3 (newest FDe bios)
2x Corsair Vengeance 4GB 1600mhz DDR3 XMP
Corsair VXEU 550W

So 2 weeks ago i've contacted Corsair support because i wasn't able to run my memory (single 4GB stick) on 1600 mhz. Turned out many people are having probs, so i stayed at 1333 mhz 9-9-9-24 1,5V.


Yesterday i bought second stick (same as the first one). I've moved the old stick to slot number 3 on MB and i've put the new one to slot number 4.

Because of this memory is running on dual channel.

I've used standard memory settings (like on single stick) wich are 9-9-9-24 1,5V.

Unfortunately it's not stable. Im getting BSOD's.


I've decided to play a bit.


I've increased NB voltage from 1,1V to 1,3V. I've increased memory voltage to 1,6V.

I've changed the timings to 9-9-9-24 (34) and 1T

Still BSOD's

2. Ive changed timings to 9-9-9-27 (34) and 2T

Still BSOD's

3. I've changed memory freq to 1066 mhz

I've used 9-9-9-24 (34) 1T timings

Still BSOD's

4. I've changed timings to 9-9-9-27 (34) 2T



Now from what i see, everything started because of the new stick and dual channel

I've run memtest for 10 hours on each stick separately and together. No problems.

1. I've googled a bit and seems like some people fixed this problem by puttings the sticks in different slots (so the dual channel would be inactive) should i try that?

2. Also, on other forums they told me to increase the NB voltage to 1,35V, memory voltage to 1,75V, timings to 9-9-9-19 (27) CR1 . But im afraid im gonna dmg the sticks...


This is screenshot of CPU Z http://i40.tinypic.com/r1wryp.jpg don't mind the timings im just experiencing...

Thanks in advance
post #2 of 6
Many RAM issues are BIOS based and the mobo makers have all had issues with their BIOS with certain RAM or mobo models.

That being said I would run Memtest86+ on each DIMM individually to check for errors and then on both DIMMs concurrently. The RAM should work properly in single or dual channel with one or two DIMMs and in all DIMM slots, though some mobos prefer the use of slot #1.

For the RAM to run OC'ed at 1600 MHz. the CPU/mobo/RAM all have to play nice as the CPU is only rated at 1333 MHz. RAM frequency. If your DIMMs test fine then your CPU IPC may just not be able to run the RAM stable at 1600 MHz. ????
post #3 of 6

Had you tried increasing the CPU-NB votlage (NOT the different NB voltage) on the IMC to compensate?


Increasing the actual DRAM voltage also helps on C2 revision Phenom II processors such as your 55, although it is rare that 1600Mhz operation with 2 DIMMs have problems on C2 revision processors.  There should be absolutely no problem running your 2 DIMMs at any sort of lower speed.  You should check the DIMM slot that you placed the second stick of RAM in, it may itself be faulty.


Also, see what happens when you update your BIOS.  BIOS updates have been known to improve memory compatibility in some cases.


One thing that will help us: what exactly are your BSOD codes?  Are your BSODs random (as with most actual memory instability problems) or just during stability tests?

post #4 of 6
Thread Starter 
Ok so.

I have the newest BIOS

I did check the sticks individually and together for 12 hours each test.

My BSOD's are mostly caused by ntoskrnl.exe or hal.dll.

Also, i set the freq to 1066, timings for 9-9-9-19-27 (2T) and ram voltage for 1,680V

I played BF3 for 1,5 hour without any probs. So that might be it but im not quite sure what has CHANGED. My previous settings were pretty much similiar to those...
post #5 of 6

1066 at 9-9-9 (i.e. worse than the generic DDR3 standard, nearly 2x as bad as the DDR2 standard)  with more than 1.5V?  That's just crazy. At this point you're going beyond and actually taking away expected bandwidth..... you should demand another kit from Corsair if these are the only specs your RAM can do.  BF3 is very bandwidth intensive - improving your memory bandwidth by running your memory at the proper speed (or lowering your DDR3-1066 timings to at least CL5) should give you a noticeable increase in FPS.


You might wish to try older BIOS revisions.

What seems weird is that your BSODs are being caused mostly by these files but these are not actually those BSODs that specifically pertain to memory error or instability.  I think the problem is beyond memory.  You should raise the CPU-NB (IMC) voltage.

Edited by xd_1771 - 2/5/12 at 11:00am
post #6 of 6
No matter what the RAM settings are you won't see any tangible system performance diff because DDR3 is not a bottleneck in the system.

The fact they you have mixed two DIMMs instead of buying one, matched RAM kit is likely the reason the DIMMs don't run at a lower latency or higher frequency - but it could be the IPC/mobo also. There is no means to tell other than testing thoguh as noted it won't make any real system improvement.
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