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CMD4GX3M2A1600C9 with Asus P7P55D-E Pro

gunrunner

By gunrunner
in Memory

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gunrunner

gunrunner

Posted
Posted

I encounter serious problems with Corsair's CMD4GX3M2A1600C9 and my P7P55D-E Pro, no BSOD or such, the computer randomly freezes and I have to reboot manually. When I start my computer, it has around 90% chances to freeze in the first 2 hours.

 

My settings are (as specified) :

Timings : 9-9-9-24-2N

Frequency : 1333mhz (since my i7 860 is not overclocked)

X.M.P mode

DRAM : 1.65v

QPI : 1.2v

 

Memtest+ shows no erros.

 

I guess this RAM is definitely not compatible with my mobo.

So what should I do?

And why is this reference not listed on Corsair's website?

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gunrunner

gunrunner

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Well I'm kind of sick of playing with QPI, timings, voltages and stuff. I can't even remember the last time I shut my computer off correctly, because no matter what I try, eventually it will always freeze.

 

Here's what clearly doesn't work (everything @ 1333Mhz):

- QPI @1.35v + DRAM @ 1.65v + 9-9-9-24-2N

- QPI @1.20v + DRAM @ 1.65v + 9-9-9-24-2N

- QPI @1.10v + DRAM @ 1.65v + 9-9-9-24-2N

- QPI @1.35v + DRAM @ 1.50v + 9-9-9-24-2N

- QPI @1.20v + DRAM @ 1.50v + 9-9-9-24-2N

- QPI @1.10v + DRAM @ 1.50v + 9-9-9-24-2N

 

I also tried unsuccessfully to switch 2N to 1N, or increase/decrease latencies, but whenever it looks stable for hours, it always ends with in a frustrating crash.

 

I can no longer waste my time, thus I guess next step for me would be a RMA request, what do you think?

 

Thanks in advance.

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Boooooo

Boooooo

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Hi I have a similar problem (random freezes, 100% hardware related and not overheat related) unfortunately not so frequent. My first thought was faulty RAM I tried all voltages and frequency/timing combinations without solving but now I am pretty sure is my video card or power supply;

try this: swapping your video card with another, better if doesn't need a power connector.

 

My freezes are gone, previously could occur even in bios setting page, during a memtest86+, or even in windows when I was idle

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Boooooo

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even my hardware are new. I tell you this because of my experience, even all my issue carried me to DDR problem or motherboard or CPU or Hard Disk...

Usually memory errors not lead to freezes but: BSOD or errors in memtest86+

You never had errors on memtest86+? I can say you memory is 90% working good

Give me a chance, try a different PCI-E (better if not need power connector) and made a memtest86+.

Usually after many minutes/hours do you have a freeze during memtest86+?

Good luck

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gunrunner

gunrunner

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I've found a great and simple solution : I've just threw them out and bought an ACTUAL working G.Skill kit of RAM. 90€ is worthless compared to the time I've totally squandered here with Corsair, and this can't be refunded.

 

Anyway, this may sounds irrational but I won't buy and recommend anything from Corsair in the future.

 

Bye.

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Update: it seems even my issue is caused by memory I am trying a different stick and I have no more freezes (I have to wait few days for more extensive tests)

 

The incredible and weird thing is that my memory probably is not faulty but simple not compatible with my motherboard since resting in bios page menù or performing a memtest86+ works with no freezes if I swap my VGA with another doesn't need power supply.

 

It's exact the same issue reported by this guy

http://forums.overclockers.com.au/showthread.php?t=918669

 

and we have completely different hardware except for similar DDR3

 

Hope I can say END to my freeze story in the next days

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Wired

Wired

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The incredible and weird thing is that my memory probably is not faulty but simple not compatible with my motherboard
Swapping the video card makes no sense, however you're right in that the memory isn't compatible. It's meant for Intel Core iX systems and not AMD systems.
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Einherjar

Einherjar

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I have the exact same memory kits and I'm also having problems. Thing is memtest detected no errors when I tested each kit separately but failed test 5 when both were in (and, before you ask, I did try different sockets). Windows memory diagnostic also detected errors. And while the system is generally stable, the problems are starting to become apparent in some real-life applications (e.g. Fifa 11 shuts down the PC and there's no way in hell the problem can be attributable to overheating because the system runs full load at 40deg max).
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Swapping the video card makes no sense, however you're right in that the memory isn't compatible. It's meant for Intel Core iX systems and not AMD systems.

 

 

I know is incredible, but I found out another guy having same issue, he has an intel system and he also find out this weird thing.

Because of freeze problem I could only try to replace components: I noticed that resting in bios settings page or performing a memtest86+ overnight make system freeze in a range of time (2 minutes 5 hours). Changing VGA with another that doesn't need power supply make the above tests freeze no more (or at lest it extended the range of time because I tried only for two night with a longer test of 16 hours).

Asrock told me they tested for me the same memory and they have no problem, I do not know if they tested with a normal VGA card.

Another common thing beside memory is that our motherboard doesn't have an integrated VGA card

 

 

@Einherjar: your seems a different issue, try using memory in "ganged" mode command rate 2T.

Better thing is to install a free tool called "CPU-Z" and take a look at SPD value, you will see a "timings table": then put this values in bios DDR configuration page (I want to say don't use automatic settings)

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Oh weird thing,

I read test #5 is related to "memory speed, timings and vdimm related (meaning altering mem speed, timings and/or vdimm saw errors in this test disappear)"

 

try the relaxed one configuration for example choosing a very low frequency

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Boooooo

Boooooo

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mhhh probably your last option is trying a different memory and see if errors persist is a motherboard or Integrated Memory Controller (is on the CPU) issue otherwise is a your original memory issue.

I read somewhere that a remote possibility of this kind of problem can be a bent CPU pin, good luck

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trackrat

trackrat

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Problem solved. All that was needed was switching the command rate from 1T to 2T - and, voila, everything works without a glitch, including memtest and prime95. Incredible that such an obscure parameter can make this much of a difference...

 

It's not obscure at all. When you have more than one module in the mobo you typically need an extra timing cycle to prevent corrupt data transfers.

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