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*Official* Intel DDR4 24/7 Memory Stability Thread - Page 69

post #681 of 4610
Kimir --- 5960X @ 4.6/4.3Ghz --- 3200Mhz C13-13-13-28 1T --- 1.4v --- SA 0.970v --- VCCIN 1.92v --- SAT 1H




And started a 5H test with reduced voltage (1.407v measured on all channel) for the night, so far (45 mins) so good. smile.gif
Edited by Kimir - 2/3/16 at 7:03pm
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post #682 of 4610
Thread Starter 
Glad you managed to bag a set that worked for you smile.gif

Personally having the refresh that high didn't work out for me. It did for the most part, but I experienced PFN list corruption at a time not long after testing it. I'm not convinced GSAT tests this aspect as well as it does others.

Would have to ask JP and see how he's found it
Edited by Silent Scone - 2/3/16 at 11:37pm
post #683 of 4610
Quote:
Originally Posted by Silent Scone View Post

Keep DRAM voltage below 1.5v. Depending on the age of the kit and binning process it may well be the same IC but the capabilities at each bin will be different. You've paid for the bin you've bought, and are not guaranteed to achieve the same results as the next bin. All of GSKILL kits are handed picked which is not cheap.

After lots lots of testing, I'm currenctly at 4.57 cpu with ram at 3300, still not stable, timings I put something similar as Raja just for testing 16-18-18-38-390 and I played yesterday for a bit, ran Firestrikes, and I achieved one of my best scores 10996 I believe was my best yesterday, so I will try to lower the BCLK bits by bits until I'm (hopefully) stable, question is, since I'm noob when I tryed to get higher speeds I bumped voltage up to 1.39 lol, so should I go back to 1.35 ? I guess that maybe even cause instability, oh well, I'm about to figure out now !

RAM overclocking session 2 here I come biggrin.gif

Oh and yea handpicked you say ? I see.. so it might make sense this kit can't do at least 3466mhz stable.. sort of like with the GPU brands like EVGA when you buy it, and you know they have been hand selecting all sorts of higher % chance overclocking and whatnot, sort of reduce the chances for you to reach a high overclocking tongue.gif

PS: should I just lower the timings also? if so which ones, since my CPU is stable at 4.6 (or like 4.59 at least) and I'm already lower than that, perhaps I can get my CPU at the speed limit while bumping the RAM to whatever it would be for that CPU speed.

Edit : http://www.3dmark.com/3dm/10603977? score with 1.35V Will do some testing see how stable it is
Edited by StrongForce - 2/4/16 at 3:08am
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post #684 of 4610
Thread Starter 
Quote:
Originally Posted by StrongForce View Post

After lots lots of testing, I'm currenctly at 4.57 cpu with ram at 3300, still not stable, timings I put something similar as Raja just for testing 16-18-18-38-390 and I played yesterday for a bit, ran Firestrikes, and I achieved one of my best scores 10996 I believe was my best yesterday, so I will try to lower the BCLK bits by bits until I'm (hopefully) stable, question is, since I'm noob when I tryed to get higher speeds I bumped voltage up to 1.39 lol, so should I go back to 1.35 ? I guess that maybe even cause instability, oh well, I'm about to figure out now !

RAM overclocking session 2 here I come biggrin.gif

Oh and yea handpicked you say ? I see.. so it might make sense this kit can't do at least 3466mhz stable.. sort of like with the GPU brands like EVGA when you buy it, and you know they have been hand selecting all sorts of higher % chance overclocking and whatnot, sort of reduce the chances for you to reach a high overclocking tongue.gif

PS: should I just lower the timings also? if so which ones, since my CPU is stable at 4.6 (or like 4.59 at least) and I'm already lower than that, perhaps I can get my CPU at the speed limit while bumping the RAM to whatever it would be for that CPU speed.

Edit : http://www.3dmark.com/3dm/10603977? score with 1.35V Will do some testing see how stable it is


Firestrike is sensitive to memory latency, and as far as benching goes this is ok, but as a stability test on a scale of 1 to 10, with 1 being the weakest it's probably a 1. You need to test your settings long term with the options available in the original post. You also might want to reaffirm other aspects of your overclock are stable before assessing memory stability
post #685 of 4610
Quote:
Originally Posted by Kimir View Post

Kimir --- 5960X @ 4.6/4.3Ghz --- 3200Mhz C13-13-13-28 1T --- 1.4v --- SA 0.970v --- VCCIN 1.92v --- SAT 1H
Warning: Spoiler! (Click to show)


And started a 5H test with reduced voltage (1.407v measured on all channel) for the night, so far (45 mins) so good. smile.gif
Nice! RMA or refund on the other kit?
Frankly - I think x99/5960X will be a strong platform for quite a while. Already 1.5(?) years in? This on will eventually end up in my wife's tax business, down tuned to a pizza-finger-proof configuration. redface.gif
Quote:
Originally Posted by Silent Scone View Post

Glad you managed to bag a set that worked for you smile.gif

Personally having the refresh that high didn't work out for me. It did for the most part, but I experienced PFN list corruption at a time not long after testing it. I'm not convinced GSAT tests this aspect as well as it does others.

Would have to ask JP and see how he's found it

Still the same - no problems, but... what's a PFN list? (still same even with Faw too low!)
FOLDing in 12 cores too
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post #686 of 4610
Thread Starter 
Quote:
Originally Posted by Jpmboy View Post

Nice! RMA or refund on the other kit?
Frankly - I think x99/5960X will be a strong platform for quite a while. Already 1.5(?) years in? This on will eventually end up in my wife's tax business, down tuned to a pizza-finger-proof configuration. redface.gif
Still the same - no problems, but... what's a PFN list? (still same even with Faw too low!)
FOLDing in 12 cores too


PFN_List_Corrupt is a bug check that means a page was read incorrectly. It stands for Page Frame Number (or Page Frame Database), which is Windows method of indexing physical pages from DRAM. It tracks everything that has a physical page. If paged into memory that is inaccessible or corrupted for whatever reason you can receive this bugcheck. DRAM isn't the only cause as it may also be driver related, or Cache.

I'm making an almost brash correlation there in truth, but tREFI was one of the only things that had changed, and it did pass 2 hours of GSAT. Since reducing the interval it's not reoccurred nor has it ever happened before.
Edited by Silent Scone - 2/4/16 at 5:47am
post #687 of 4610
Quote:
Originally Posted by Silent Scone View Post

I'm making an almost brash correlation there in truth, but tREFI was one of the only things that had changed, and it did pass 2 hours of GSAT. Since reducing the interval it's not reoccurred nor has it ever happened before.

Hello

It can be difficult to catch instability because of insufficient tREFI. The total refresh operation is done in a number of smaller operations so all cells are not refreshed at the same time. Each cell also has a slightly different leakage rate. And if tRFC is not set so the charge pumps are given sufficient recovery time not all cells may be fully refreshed. Compounding this is the introduction of Fine Granularity Refresh for DDR4. When testing memory it's hit and miss as far as testing a cell that may have suffered from an insufficient refresh time.
post #688 of 4610
Thread Starter 
Quote:
Originally Posted by Praz View Post

Hello

It can be difficult to catch instability because of insufficient tREFI. The total refresh operation is done in a number of smaller operations so all cells are not refreshed at the same time. Each cell also has a slightly different leakage rate. And if tRFC is not set so the charge pumps are given sufficient recovery time not all cells may be fully refreshed. Compounding this is the introduction of Fine Granularity Refresh for DDR4. When testing memory it's hit and miss as far as testing a cell that may have suffered from an insufficient refresh time.

Thanks Praz. Yeah this was a blue moon crash which may likely now never happen again, but out of morbid curiosity I'm tempted to raise the interval again to see if it's replicable. Raja has said to possibly try putting the system to sleep with lots of things suspended to DRAM. As with all things DRAM being able to repro things of this nature can take too long
Edited by Silent Scone - 2/4/16 at 7:20am
post #689 of 4610
Quote:
Originally Posted by Silent Scone View Post

Thanks Praz. Yeah this was a blue moon crash which may likely now never happen again, but out of morbid curiosity I'm tempted to raise the interval again to see if it's replicable. Raja has said to possible try putting the system to sleep with lots of things suspended to DRAM. As with all things DRAM being able to repro things of this nature can take too long

Hello

This paper is a couple of years old now but if you get bored offers some good insight into FGR used with DDR4.


FineGranularityRefresh.zip 986k .zip file
post #690 of 4610
Thread Starter 
I'll do my best. Beyond not making a joke about preemptive command draining
Edited by Silent Scone - 2/4/16 at 7:01am
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