CM3X2G1333C9 and Asus P7P55D LE instability

[luisa]

Hi,

I have 4 modules of cm3x2g1333c9 and getting instability (freezes, the occasional reboot and bsod). I ran memtest and found no errors. Maybe my bios settings for this ram are wrong? Note that I didn't touch them (and that I don't wish to do any overclocking etc, just to have a working pc would be great!).

 

Also, on corsair.com I found that in principle this model of ram is not among the recommended ones for my mobo. Could it be that this is the problem?

 

thanks a lot,

luisa

[trackrat]

The TW3X4G1333C9 is meant to be used as one kit. Mutiple kits may or may not function together per the Memory Upgrade Guide link in my signature. You can try setting the BIOS to 11-11-11-30 2T and see if this helps.

 

Note: Part Number edited for clarity.

[luisa]

Hi,

and thanks a lot for your quick answer. I will try to change the bios settings, but I just wanted to ask: how can the cm3x2g1333c9 be meant to work as one kit if it was sold to me in two boxes with two modules each (number TW3X4G1333C9A G)?

thanks a lot

Luisa

[trackrat]

A cm3x2g1333c9 is one DIMM module. It is one of two DIMMs that comprise the TW3X4G1333C9, which is a two module, matched 4 GB. kit. In the above comment I should have used TW3X4G1333C9 to be clear perhaps? (I will edit it now.) If Corsair sold the RAM as ONE tested, matched kit, then you are fine. If you purchased two kits or a retailer used two kits to supply the quantity of RAM you desired, they may not work well together? It's always best to purchase the total RAM you desire as ONE tested, matched kit. Multiple kits are not guaranteed to work together.

 

http://www.corsair.com/_datasheets/TW3X4G1333C9.pdf

[Wired]

In otherwords, two kits are not meant to be used together as they are not packaged, tested, or sold that way. There's no way to guarantee how they'd work together.

[RAM GUY]

With two sets you can try and set the memory frequency at DDR1066 and increase the memory Voltage to 1.6 Volts and see if its more stable.

[luisa]

Hi, thanks everybody for your answers. First of all I will talk to the shop to see if a) they can maybe change the 2x4 to a 1x8 group (with some price difference) or b) let me change the bios settings without invalidating the warranty. I'll let you know.

thanks a lot

Luisa

[RAM GUY]

You might see if they can change to CMX8GX3M2A1333C9

that is an 8 Gig set 2 x 4.0 Gig modules that may run better on that MB.

[luisa]

Hi everybody,

sorry for disappearing for so long. Possibly the soap opera is now concluded ;)

I brought the pc to the shop, they examined it and concluded one RAM module was showing some parity defect that would show up only when testing each module separately with Memtest (running Memtest on all of them at once showed no problem at all), so they changed it, claiming this would fix the reboots. They also updated the BIOS. I thanked, brought the pc home... and the freezes happened again. Re-brought it to the shop, they re-examined it and said now they couldn't find any other problem, everything looked fine to them, they suggested it might be some software. I started uninstalling ZoneAlarm, SpybotS&D, Avira, etc, pretty much to no avail, until now I *possibly* found what the glitch is.

I used to connect external hard drives, then when finished using them I'd unplug the external hd's power cord but not the usb cable. Well, apparently that's the problem. When I started regularly unplugging the external hd's usb cable as well after use, all the problems stopped.

Thanks very much anyway for your help and your prompt replies.

[RAM GUY]

Just glad you got the problem solved and thank you for letting us know!