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post #61 of 1055
Quote:
Originally Posted by CL3P20 View Post

30min of IBT on Max.. jeebuscrust.. I dont think I have ever used a computer that was that 'stable'.  .. ok i joke.. 

 Really though.. what can you even run, software wise that can produce loads like IBT? If thats not a "stable" system.. I will just stop using computers today. tongue.gif

That & I change things too often to spend time running prime, 30 minutes is about my limit for stress testing if that much.
The memory is already in with a different mobo & cpu. Have booted this so far on the asus board but not doing well at getting even pi 32m stable yet.

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post #62 of 1055
Quote:
Originally Posted by Blameless View Post

I've got 32GiB, 1866, 9-9-9-27, seemingly stable again.

Had to tweak my VCCSA and VTT more extensively (I'm at 1.15v on both right now), as well as loosen a few sub-timings. It wasn't that the sub-timings themselves were unstable, it's that the auto detected RTLs and IOLs were occasionally set too low by the BIOS. Since I can only set offsets on these, and not 100% manual/fixed values, I had to loosen the other timings to 'trick' the board into setting the correct IOL range.

I also had to boost vDIMM to 1.385v.

I'm 14 hours into a Prime95 run. If all goes well, I'll switch to LinX in about 10 hours.
Quote:
Originally Posted by CL3P20 View Post

 Really though.. what can you even run, software wise that can produce loads like IBT? If thats not a "stable" system.. I will just stop using computers today. tongue.gif

Very little, minute for minute, but I do plenty of things that are far more likely to produce a memory error over the span of hours or days than LINPACK tests will in 30 minutes.

So, I usually run about 48 hours of LINPACK with 95% memory usage, in addition to my other tests.

I like to have a system that I can set to a demanding task, walk away, and comeback a month or two later and it's still doing what I told it to do.

 

@ Blameless..  Your doing some crazy computing then sir! My hats off to you. Folding while gaming is about the only thing that 'stresses' my daily user. 

 

 *As for your RTL issue.. Im curious if your mobo is keeping tRWSR and tRWDRDD too tight for your RAM's liking? Those timings are more IMC bound than RAM.. seems 3-4 is tight for most boards with RAM speeds between 1800-2200mhz .. 5-6 can allow for some higher speeds without increasing voltage for me. You may want to keep VTT a notch higher than SA/IMCv as well.. 

post #63 of 1055
Well this is awesome. In an unexpected twist of events, it's now prime95 that keeps getting an error after just a couple of hours, even though HCI at boot can run 500%+ at tighter timings and lower voltages (which takes about 24 hours). Either Prime95 is really on the ball all of a sudden, or my CPU decided now would be an excellent time to conclude break-in time and require higher voltage. Either way, I'm getting the distinct feeling I've spent about a week tweaking and running stress tests for nothing. frown.gif
I've reverted back to my old settings (4.5ghz CPU, 2000mhz RAM) for now, I'll have to test the CPU individually later. For now I want to actually use my pc for a bit before going back to stress testing.
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post #64 of 1055
post #65 of 1055
yottabyte the mems do 2000MHz at 1.5v with those 9-9-9, and you are missing the prime95 test...
post #66 of 1055
Quote:
Originally Posted by [CyGnus] View Post

yottabyte the mems do 2000MHz at 1.5v with those 9-9-9, and you are missing the prime95 test...

I haven't messed around with memory overclocking for more than a day yet so I'm still working on it and I don't need prime95 to join the club "To enter the club, have a to take a screen shot of your CPU-Z screen showing your memory with a note pad with your OCN name on the same screen." Which is all I want to do right now. When I mess around with it some more and get an OC I like I will post it with prime95 and all thumb.gif

EDIT: Thanks you for letting me know about the 2000Mhz though CyGnus. I believe I tried that and when I ran Memtest86 it was showing up as 2666Mhz... Any idea why?
post #67 of 1055
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post #68 of 1055
Quote:
Originally Posted by CL3P20 View Post

@ Blameless..  Your doing some crazy computing then sir! My hats off to you. Folding while gaming is about the only thing that 'stresses' my daily user. 

 *As for your RTL issue.. Im curious if your mobo is keeping tRWSR and tRWDRDD too tight for your RAM's liking? Those timings are more IMC bound than RAM.. seems 3-4 is tight for most boards with RAM speeds between 1800-2200mhz .. 5-6 can allow for some higher speeds without increasing voltage for me. You may want to keep VTT a notch higher than SA/IMCv as well.. 

This system if going to be a jack of all trades, but near absolute stability is important as some of the work I do on it is helping my wife finish her PhD. Whenever she has sequencing problem that won't fit into the 24GiB of memory that her workstation has (the X58/i7 970 build in my sig), it's going to run on this (we haven't run into anything in ARB that can't fit in ~30GiB of memory, yet). Saves us time from having to send it off to be run on a supercomputer somewhere (the supercomputers can finish the tasks far faster, but by the time she's through the queue this system can already have done it). I also Fold or run projects when I'm away on vacation.

Anyway, my board doesn't have a tRWDRDD setting, but all related tertiary timings are quite tight (0-3) and and tRWSR is 3. Loosening them produced less favorable results than simply loosening tRRD and tFAW to 7 and 40 (forcing all IOLs to 5-6, as an auto detect of 4 on some rows was crapping things up, and any manual offset sometimes produced settings of 7, which was just as bad for stability).

Regarding SA vs VTT, this chip with 8 DIMMs seems to prefer equal or greater SA voltage. If I bump VTT past a narrow range (depending on clock speeds) stability rapidly declines. I may be able to tweak a bit further, but I'm hesitant to start testing over after I'm nearly two full days into it (and has taken almost a week of 12 hours a day of tweaking to get to these settings). 1.15/1.15 is well within safe limits, so if it's stable at this point, I don't plan to screw with it too much. Maybe if I'm feeling really bored at some point I'll loosen tertiary timings and shoot for DDR3-2133.

I do think I've got everything stable now. I finished off 24 hours of Large FFTs without error, had to bump vcore a notch to 1.336v load (at 4.4GHz) to stablize 8 hours of Small FFTs, now I'm several hours into a custom Blend test using 28-30GB of memory. All seems well, and I expect it to pass. After that I'll finish off CPU/memory testing with a few hundred loops of LinX and some HCI Memtest.

Currently at 1866, 9-9-9-27-T2, 7-200-15-7-40-7-8 (tRRD-tRFC-tWRT-tRPT-tFAW-tWRD-tWL), 0-2-3-3-3-3-1-1-3-0 (tRRDR-tRRDD-tWWDR-tWWDD-tRWDR-tRWDD-tWRDR-tWRDD-tRWSR-tCCD).

This is with 1.385 vDIMM (idle is about 1.41v, but full load is very near set point), testing in 30C ambients, with FurMark running in the back ground to dump some extra heat in the case.

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post #69 of 1055

Now thats a healthy load..  your level of stability I would say goes far and beyond what most people use for daily operations. 

 

*As for the VTT vs. SAv ; Holy hell.. with 30GB's of memory.. yeah, your IMC will take some 'juice' to keep things sorted out biggrin.gif. Nuff said. Nice rig btw.. that thing is a monster.

post #70 of 1055
Hey tjjAngel why not test the ram only as we already "know" the cpu is "stable" instead of running prime we only test the ram in custom with
Min FFT 2048 Max 4096 not in place?? 15min for like 2hrs and we jump all the cpu tests all together?

Its what i use for example while searching for cpu vcore stability with 8k and 20k in place ffts... never fails XD
Edited by zGunBLADEz - 12/15/12 at 6:24pm
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