RAM wont boot with LOOSER timings

[Smoblikat]

So ive been having instability lately and i figured out its my RAM. So i went to loosen some timings, i was previously DDR3 2133 CL9-11-10-24, i want to be 11-11-11-30. But if i try to reboot with the CL11 my computer wont start, but if i do 10-11-10-30 it boots fine. Why would it not work with looser timings? Voltage is 1.65v since im running 16gb of ram (4x4gb)

First kit:
http://www.newegg.com/Product/Produc...82E16820231519
Second:
http://www.newegg.com/Product/Produc...82E16820226245

I want to run 11-11-11-30 @ 1.65v, but i can only boot in as low as 10-11-10-30 1.65v, whats teh problem?

 

[Smoblikat]

BUMP

 

[Joseph F]

While I don't have an answer to your problem, I would strongly recommend that you don't run 1.65V through your 2500K's RAM controller. Have you tried overvolting the PLL yet?

 

[Diogenes2]

What applications do you run that benefit from the marginally higher performing RAM ?

 

[yhelothar]

I get this as well. I was surprised that this occurred, but I suppose that's just how DDR3 works.

 

[Smoblikat]

What applications do you run that benefit from the marginally higher performing RAM ?

I dont understand your question, im attempting to make my RAM slower.

While I don't have an answer to your problem, I would strongly recommend that you don't run 1.65V through your 2500K's RAM controller. Have you tried overvolting the PLL yet?

Do i need to overvolt the PLL? I have PLL overvoltage disabled and its voltage is set to 1.75

I get this as well. I was surprised that this occurred, but I suppose that's just how DDR3 works.

Are you having the same problem?

 

[Diogenes2]

I dont understand your question, im attempting to make my RAM slower.
...

I was just wondering why you had 2133 RAM ..

 

[Smoblikat]

I was just wondering why you had 2133 RAM ..

Oh, i got 16gb for 100$.

 

[Diogenes2]

That's good reason..:biggrin:

 

[Meghan54]

That's good reason..:biggrin:

Another is one can typically run it at slower speeds and really crank down on the timings, getting them tighter than stick rated at that slower speed, such as moving down from 2133 to 1600. Moving a 2133 set down to 1600 speeds may make it possible, and I emphasize MAY, to set the timings much tighter than sticks rated only for 1600 speeds. But a lot depends upon the mfgr. of the RAM, IC's used, etc., etc.

 

[Smoblikat]

Another is one can typically run it at slower speeds and really crank down on the timings, getting them tighter than stick rated at that slower speed, such as moving down from 2133 to 1600. Moving a 2133 set down to 1600 speeds may make it possible, and I emphasize MAY, to set the timings much tighter than sticks rated only for 1600 speeds. But a lot depends upon the mfgr. of the RAM, IC's used, etc., etc.

Ya, my mushkin is CLEARLY a higher end chipset. Though im not sure it supports booting at CL 11, is this possible? My Gskill runs fine by itself, but as soon as I loosen the timings with my mushkin all hell breaks loose.

Im a big guy for the ghz, i dont care about latency as much. It might not give me the best performance, but its what i prefer.

 

[Smoblikat]

Somthing i might not have mentioned. I performed memtest on each pair of sticks individually (both mushkin and Gskill) and neither of them received any errors in memtest running at stock settings. Its when i combine them that i get errors, and i know i can get rid of the errors if i can go to 11-11-11-30, but my computer refuses to boot. Is there some settings i should enable?

 

[notty22]

It might be the way the sub-timings are being set based on the different main cas.
With my board for example.
You can choose normal, turbo, extreme modes.
Which I think will alter those sub-timings that are on auto based on the main timings.
That are not on AUTO. I set the 8 8 8 31 and 128 (trfc) manually
Use the program in this picture to take a look at them.

 

[Joseph F]

I dont understand your question, im attempting to make my RAM slower.



Do i need to overvolt the PLL? I have PLL overvoltage disabled and its voltage is set to 1.75



Are you having the same problem?

I'm not sure what voltage your should set your PLL to, but when you're running 4 sticks at 2000MHz+, I hear that it's recommended to overvolt it.

 

[Smoblikat]

It might be the way the sub-timings are being set based on the different main cas.
With my board for example.
You can choose normal, turbo, extreme modes.
Which I think will alter those sub-timings that are on auto based on the main timings.
That are not on AUTO. I set the 8 8 8 31 and 128 (trfc) manually
Use the program in this picture to take a look at them.

Im acquiring AIDA right now, and i jsut downloaded CPU tweaker too. Thanks a lot. Ill post back if this turned out to be the problem. i beleive it is, since im no fully stable at 10-11-11-30. its that damn first 11 that screws me over.

 

[notty22]

You could always experiment and see what performance you get from going to 1866 frequency.

 

[Smoblikat]

You could always experiment and see what performance you get from going to 1866 frequency.

Thats definitely an option, though im trying to retain my 2133 as best as I can since im compeing with my friend against his RAM , he has 1866.

 

[Smoblikat]

The plot thickens..................
So if i run 16gb at 10-11-11-30 1.65v, not only does everything in windows crahs randomly, i get a lot of memtest errors. So i tested just my pair of Gskill at these speeds and received zero errors in memtest, even after 3 runs. Since I already tested my mushkin pair at these speeds i figured id try and get to the elusive 11-11-11-30 on them...........not only did they boot fine into memtest, absolutely no errors. So i get errors when combining them together at speeds they are both fully stable at when seperated, and i cant undertime them together even though both sets run fine at 11-11-11-30 seperatley. I did try messing with the limited selection of sub timings that i have avaliable to me when i had 16gb installed, then i put it to Cl11, no go.

tl;dr
My gskill posts fine at CL10 and 11, my mushkin posts fine at CL11 and CL10, when combined i cant post at CL11. because of this i get insability, even though both pairs remain stable at all sorts of timings during memtest.

Please help me understand this, it doesnt make much sense.

Also, not sure if thsi matters. But when i had my mushkin and gskill in at the same time it only gave me the option of XMP 1.2 (i dont use XMP, its all manual) but with just the Gskill it gives me option of XMP 1.3.

 

[notty22]

I think you are asking to much of the memory controller and motherboard with that much memory overclock. Especially using different sets of ram . More sticks increases inherit hardware limitations. It always has.

 

[Smoblikat]

I think you are asking to much of the memory controller and motherboard with that much memory overclock. Especially using different sets of ram . More sticks increases inherit hardware limitations. It always has.

But wouldnt it be less stressful to run it at CL11 vs the Cl10 it runs fine at?

 

[VirtualLarry]

four sticks at 2133 is going to be very stressful, regardless of the latency required to make it work.

 

[Smoblikat]

four sticks at 2133 is going to be very stressful, regardless of the latency required to make it work.

Interesting, i would have thought its an acceptable clock rate considering SB is rated for 32gb.

 

[Smoblikat]

I beleive i have figured it out. By changing 1T to @t i can now have my good timings back, and my stability.