BSODs after expanding memory from 16GB to 32GB

[EnsoniqHT]

Hi, looking for a little advice on what to try to stop my PC from giving me BSODs.

I built this system a few weeks ago initially with 16 GB of RAM, it has run flawlessly configured that way. Last night I added 16 GB more RAM of an identical RAM kit to my system. All 32GB is listed and detected in Windows, however I seem to get frequent BSODs, every hour or 2 approximately.

Further testing my system, I removed the 16GB of RAM I originally had installed and then ran the system under a high load and thoroughly tested it, it no longer BSODs. So it would appear I can run either kit of 16GB RAM stable, but the problem arises when I try to run all 32GB.

I ran a 9 hour MemTest, using MemTest v4.20 on all 32GB of RAM and it passed 3 times with no errors.

The BSOD errors I have been given so far are

DRIVER_IRQL_NOT_LESS_OR_EQUAL
IRQL_NOT_LESS_OR_EQUAL
SYSTEM_SERVICE_EXCEPTION

Hardware information:
Motherboard - Asus Z87-Pro, http://www.newegg.com/Product/Product.aspx?Item=N82E16813131979
CPU - Intel i7-4770k
RAM - Kingston Hyper X DDR3-2400 KHX24C11T3K2/16X, http://www.newegg.com/Product/Product.aspx?Item=N82E16820104374
GPU - EVGA GeForce GTX 670
SSD - Samsung 840 EVO, http://www.newegg.com/Product/Product.aspx?Item=N82E16820147255

I've tried the XML Profiles in the BIOS which didn't seem to fix the issue. The BSODs have occured generally while playing World of Warcraft, and I've seen some during Windows boot as well.

Any suggestions, or recommendations for the settings in my BIOS would be appreciated. Thank you

[HiVizMan]

Sad to say even if you have two kits of the same model and part number there is no certainty that they will work together. Just because ram has the same part number does not guarantee that they are programmed the same or even have the same batch of chips used in their manufacture.

I guess that is why matched kits are so expensive.

I would suggest running memtest86+ as per my guide in my sig to determine which kit is the problem, or which stick is the problem.

[EnsoniqHT]

Right now I am running all 32GB of RAM at 1333mhz as opposed to 2400mhz and it would appear that for the time being, I am stable. Should I have purchased a 8GBx4 kit to have avoided this issue to begin with? Hindsight, I was unaware of 2 matching kits not being guaranteed to work together. As long as I can run all 32Gb stable I should be happy, just disappointing to know I may not be able to get the full 2400mhz out of em.

Edit:
1600mhz which is the highest non OC speed seems to run perfectly stable as well. 2200mhz which is the setting below 2400mhz, would not boot at all. I will likely keep it at 1600mhz until more information is available to me on the issue. Thanks again for any advice offered.

[HiVizMan]

Mate do not get disheartend it will get done but just going to need some tweaking. Right now I need to sleep.

Leave it at 1600 for now and we will work on this in the morning.

[Arne_Saknussemm]

I would forget about setting XMP per se. Put in one kit and restore BIOS defaults F5...save and exit F10. Then back into BIOS...load XMP and copy down first second and third timings. Then clear BIOS back to defaults and then try setting up both kits, one on each set of slots, entirely manually. Might need to give them a bit more VCCSA/VTT and even a bit more VDIMM. But two kits is not guaranteed even though that platform can be more forgiving....

[Praz]

Also please keep in mind that not all Haswell CPUs can run 32GB of memory at 2400MHz regardless if the set is matched or not.

[EnsoniqHT]

This is all very good stuff to know. I'll keep it running 1600mhz as it is still appearing to be stable at that. Over the next few weeks I'll begin experimenting with running it at 2400mhz and manually configuring the timings as well and trying a few tweaks to hopefully find that right combination that gets a stable 2400mhz setup going, and worse case scenario, I still have this stable 1600mhz configuration to fall back on. Thanks again for all the input.

[HiVizMan]

Right back - could you have a look at the full SPD information of your memory and the full XMP profile of each of the sticks. That can be checked in the bios. Use a fat formatted USB stick and F12 to take a screen.

What you are wanting to do is have a idea of what the two kits have set as their programming for the different profiles v jdec. You should pick up the difference just by comparing the two images of the settings side by side.

[EnsoniqHT]

Forgive me if I screenshot'd the incorrect things, I took screenshots of any menu I thought might be relevant.
http://imageshack.us/a/img541/5599/iegr.png
http://imageshack.us/a/img692/4298/zecr.png
http://imageshack.us/a/img708/1864/hxb1.png
http://imageshack.us/a/img194/2833/kqca.png
http://imageshack.us/a/img811/283/kb73.png
http://imageshack.us/a/img203/1125/gy5i.png
http://imageshack.us/a/img43/2305/cm4d.png
http://imageshack.us/a/img59/4478/05rb.png
http://imageshack.us/a/img541/4683/cr0q.png

These are all taken with XMP Profile 1 set.

[HiVizMan]

Please upload using the ROG image host. This will embed them into the forum. It is the tree icon.

You can select all those files at once and upload them at one time.