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*Official* Intel DDR4 24/7 Memory Stability Thread - Page 63

post #621 of 4610
Quote:
Originally Posted by Raja@ASUS View Post

No, the tRRD_L timing denotes Act to Act delay for same bank group, while tRRD_S is different bank groups. tFAW is a timing for tRRD_S only. Four concurrent Activates are not sent to same bank group, hence no tFAW_L timing exists.

Thanks. thumb.gif

Is there a manual or something on these things..? I've tried searching a long time ago, results weren't satisfactory, IIRC.


If there's none, you mind listing out the rules you know of..? Now or later, whenever you are free.
Plzzz... poke.gif
post #622 of 4610
Check the ROG forums for some of the UEFI guides which include some DDR3 laws. No bank groups there, but the rest of the timing laws for min values between associated timings are same.
post #623 of 4610
Quote:
Originally Posted by Raja@ASUS View Post

tFAW min is 4X tRRD. tFAW is four Activate window. tRRD is Activate to Activate delay.

tRTP is read to Precharge. This setting is not related to tFAW or tRRD.

Ahhhh. I'm liking tRTP on 6. At first I was unstable but I had TWR on auto, I set TWR to 12 as per the guide on hwbot and I'm up to 700% hci pass. I do have tFAW on 24 tho so I take it I can reduce that back down to 16 or double check what my tRRD is set at.

Actually thinking about it, I think that's set at 6 so 24 will be good.

Thanks for the input Raja. Look forward to episode 3 of the podcast too by the way.

Also is there somewhere I can read up on what these things do. Even if they are currently over my head, there must be something I can read for some bedtime reading.

*** edit

I'll check the rog forums as I just seen the above post!
Edited by llantant - 2/1/16 at 1:18pm
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post #624 of 4610
Quote:
Originally Posted by Raja@ASUS View Post

Check the ROG forums for some of the UEFI guides which include some DDR3 laws. No bank groups there, but the rest of the timing laws for min values between associated timings are same.

Found it.
cheers.gif
Quote:
Originally Posted by llantant View Post


Also is there somewhere I can read up on what these things do. Even if they are currently over my head, there must be something I can read for some bedtime reading.

https://rog.asus.com/forum/showthread.php?33488-Maximus-VI-Series-UEFI-Guide-for-Overclocking thumb.gif
post #625 of 4610
Thread Starter 
Quote:
Originally Posted by llantant View Post

Ahhhh. I'm liking tRTP on 6. At first I was unstable but I had TWR on auto, I set TWR to 12 as per the guide on hwbot and I'm up to 700% hci pass. I do have tFAW on 24 tho so I take it I can reduce that back down to 16 or double check what my tRRD is set at.

Actually thinking about it, I think that's set at 6 so 24 will be good.

Thanks for the input Raja. Look forward to episode 3 of the podcast too by the way.

Also is there somewhere I can read up on what these things do. Even if they are currently over my head, there must be something I can read for some bedtime reading.

*** edit

I'll check the rog forums as I just seen the above post!

I'll stick up for JP as he-did know this, I think he just had a blunder moment lol biggrin.gif
post #626 of 4610

Thanks dude. I know what I'm reading through in bed tonight thumb.gif
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post #627 of 4610
Quote:
Originally Posted by Silent Scone View Post

I'll stick up for JP as he-did know this, I think he just had a blunder moment lol biggrin.gif

thumb.gif

Also I cannot check what my tRRD is set at currently anyway. I don't want to stop hci so far in. I'll have a check in the morning.

Either way I got a nice bump in performance with jpms suggestion regardless biggrin.gif
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post #628 of 4610
Quote:
Originally Posted by Raja@ASUS View Post

No, the tRRD_L timing denotes Act to Act delay for same bank group, while tRRD_S is different bank groups. tFAW is a timing for tRRD_S only. Four concurrent Activates are not sent to same bank group, hence no tFAW_L timing exists.

Ahh, I think that tRRD_S is set to 5, RAS to RAS delay? (tRRD_L is 7)

Should I set FAW to 20 or because as Jpm suggest no less than x4, 24 would be ok anyway?
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post #629 of 4610
Quote:
Originally Posted by Silent Scone View Post

JP will kick himself over that one tongue.gif

Kicking has commenced. redface.gif

here's where I'm at on x99.... z170 is set to fold so ram is only 3466loose. ]




got a GSAT somewhere... lol, in this thread most likely.

hopefully rig runs solid, uninterrupted for the next 7 days...
Edited by Jpmboy - 2/1/16 at 2:10pm
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post #630 of 4610
Quote:
Originally Posted by llantant View Post

Have a look at my above post, theres a link to a nice guide. Of course that guide is pumping alot of voltage through the kits but its a good read and gives a good idea on some of the important timings.

Basically my advice is to have a good windows image to hand and then try a whole bunch different timings and speeds!

If you up the speed then you will have to loosen timings and/or up voltage.

Also you seem to be running memtest with 7 iterations of 2gb? You should be splitting amongst 8 threads. So 8 instances and less than 2gb each. 1650 approx depending on how much windows is running.

Thx for the quick reply and guide hint thumb.gif will be reading that later tonight. Thx Silent Scone for the quick reply also.

Didn't know 1 more thread of HCI would make a difference when running values above 500% on 14 out of 16Gb, still learning biggrin.gif

Realized when i looked better at the timings i posted from HWiNFO and they are above what kit specs says they should be. After reading the guide i will probably set the spec timings and check if that runs stable without added voltage. Hmmm CPU-Z reports the kit spec timings... lol. one is wrong... which one? lol

Thx for the guidance thumb.gif
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