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Set of timings for DDR3 Elpida Hyper

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On 1/19/2019 at 12:12 AM, TaPaKaH said:

On tRCD - 1020 hardly tells you anything. tRCD 6 would be extremely impressive (only Hicookie's GTX2 were capable of such a feat), tRCD 7 is standard on 90-95% of sticks. If tRCD 8 is necessary at 1020 then kit is garbage.

But you are comparing LN2 RAM vs. ambient here? :confused: On LN2, both Luumi and Cookie's have 32M runs at those settings or above.

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I don't know why Luumi ran tRCD 8, usually this is not necessary even on air.

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17 hours ago, TaPaKaH said:

I don't know why Luumi ran tRCD 8, usually this is not necessary even on air.

More likely to be an IMC rather than a stick limitation. @Luumi, do you remember? :)

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did a quick test on my kit at 2.1V, they keep on scaling, 6-6-5 at 976 is doable at that.

6-6-5_2.1V.png

Might manage 6-6-5 at 986 (it did manage half a run before I got too greedy and went to 1000, but it doesn't scale anymore with voltage from here (sticks might be getting too hot too, though I have plenty of airflow right now)

 

Next steps are  -optimising subtimings (still using the same as at 1107) -trying if it goes any further at 6-7-5/6-7-6/6-6-6

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26 minutes ago, ground1556 said:

did a quick test on my kit at 2.1V, they keep on scaling, 6-6-5 at 976 is doable at that.

6-6-5_2.1V.png

Might manage 6-6-5 at 986 (it did manage half a run before I got too greedy and went to 1000, but it doesn't scale anymore with voltage from here (sticks might be getting too hot too, though I have plenty of airflow right now)

 

Next steps are  -optimising subtimings (still using the same as at 1107) -trying if it goes any further at 6-7-5/6-7-6/6-6-6

I probably wouldn't advise running hypers at that kinda voltage for too long, it's not going to do the longevity of them any good.

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11 hours ago, ObscureParadox said:

I probably wouldn't advise running hypers at that kinda voltage for too long, it's not going to do the longevity of them any good.

Its a kit as bad as they come, planning on getting a new one asap. For most of my benching I’ll keep them below 1.95 most likely. Haven’t confirmed, but I’m almost sure they can’t do spec.

 

...they do spec, and now that they have taken 2.1V for maybe an hour of testing they suddenly work much better then before, currently running 1050 7-7-6 at 1.775V, 1000 7-7-6 seems to be good for 32m at 1.68V and 1100 7-7-6 at 1.85V...

Edited by ground1556

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2 hours ago, M1RR0R said:

can you try this mem under SS/ln2? 

If I get around buying a memory pot I’ll most likely run it on dry ice. Will also try some more mounting pressure on the peltiers, maybe I can get to a little lower with this setup already. I also have a feeling I degraded the imc a bit with the high memory voltage, need to grab one of my remaining high memory clock capable chips for more testing...

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I tried hypers on SS ages back, did 2000 6-6-4 @2V in 32M on Z97. Those sticks were ~1.66V 2000C7 I think.

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9 hours ago, Noxinite said:

did 2000 6-6-4 @2V in 32M on Z97

what about CL7? 2400+ with 7-7-7/7-8-7 is possible? 

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On 2/26/2019 at 1:19 AM, M1RR0R said:

what about CL7? 2400+ with 7-7-7/7-8-7 is possible? 

Pretty sure I've only seen l0ud_sil3nc3 pull this off. At least at ambient temps that is

1644958919_BestHyper.thumb.JPG.f76d1ae44712eed8674c7773ca8fd66f.JPG

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Hiwa ran G.Skill Perfect Storm Hypers on cold 2600 7-7-7 lots of years ago iirc (Ivy Bridge), but I am not sure this makes sense on most newer platforms

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12 hours ago, websmile said:

No, maybe you find it at xs where he posted that

Thanks, I went to check and 5 hours later I made it back to this thread. Never send a ddr3 guy to xtreme pi alone, very easy to get lost in there reading about XDZ, XDX, XDY, XDT, XDR, XEA, XEB, XED, XEE, XEF, XEJ, XEV, XEX, XEY, XFD and XFE to name a few.

Only Ivy era run with hypers i saw was. . .  http://www.xtremesystems.org/forums/showthread.php?280903-SuperPi32m-5Ghz-Ivy-All-Out-Challenge!&p=5103700&viewfull=1#post5103700

And only hiwa runs were 2x2gb Trident BBSE and 4x2gb Trident PSC

http://www.xtremesystems.org/forums/showthread.php?280903-SuperPi32m-5Ghz-Ivy-All-Out-Challenge!&p=5177133&viewfull=1#post5177133

http://www.xtremesystems.org/forums/showthread.php?280903-SuperPi32m-5Ghz-Ivy-All-Out-Challenge!&p=5172912&viewfull=1#post5172912

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No one posted decent results for the list bc Hypers are too slow for Ivy and haswell - I made a fast check myself and found that Hiwa ran only 1m at single stage mems -40 at 2600 7-8-7 with his Perfect Storm. Maybe GTX2 for example with more cold can do better, he mentioned that stability at divider level ended 2400 for him, which is not much considering that even GTR can do 2400c7 32m on cold

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4 minutes ago, websmile said:

No one posted decent results for the list bc Hypers are too slow for Ivy and haswell - I made a fast check myself and found that Hiwa ran only 1m at single stage mems -40 at 2600 7-8-7 with his Perfect Storm. Maybe GTX2 for example with more cold can do better, he mentioned that stability at divider level ended 2400 for him, which is not much considering that even GTR can do 2400c7 32m on cold

I wasn't using the list as reference tho. Went through 20 pages of "hiwa posts". lol. What would you guess  best time would be for hypers on Haswell/DC at any popular cpu speed. ie 4.0/4.5/5.0 or even 4.7 uh hum Div VII. Looking for a time to shoot for, maybe sub 5.59.000 5g?

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I am quite sure George already is around best you can get on Hypers at 1150 at 4G. Sub 6 should work for sure , if 5,59 sub I am unsure. Tbh, this is much more of a theoretical question as Hypers are pretty much frequency limited nd their reign ends with Sandy Bridge latest

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No coldbug up until -40 at least. MHz/volt doesn't improve much. tRCD drops by about 1 value (but not lower than CAS). Voltage scaling stops later.

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Posted (edited)

Keep the contacts on the sticks clean, I thought one of my sticks had degraded badly, cleaned the contacts and it went from 1025 7-7-6 at 1.85V to 1100 7-7-6 at the same voltage, now testing less voltage (tRCD wall at 1100)

Edited by ground1556

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Oh, quick note too - if your sticks are dead/badly degraded the trick from d9 times of throwing them in the freezer over night or longer might work. Got 3 (out of 4, last remains unable to boot) 2000 c8 dimms that didn’t manage XMP, JEDEC boot or post at all before back to where they belong around 2000 7-7-6 at 1.66V. 

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