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Perfect RAM Timing Rule (Posting Resuts Of Using The Rule Is Appreciated)

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post #1 of 36 (permalink) Old 01-18-2015, 08:49 AM - Thread Starter
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I was uploaded it years ago 12-18-13

Orignally From another overclocking website
Conversation can be OFFENSIVE
http://www.overclockers.com/forums/showthread.php/741122-Perfect-Ram-Timing-Rule

Posting negative results are also appreciated, as it will tell us that the rule is Wrong


I recomend using this rule when you are overclocking so hard that all of your timings needs to be changed to increace overcloking freedom thumb.gif

Rule applies to any DDR RAM (DDR1,2,3,4)

Spoiler is to keep record of the old version posted. Ignore it cause it is wrong.
Warning: Spoiler! (Click to show)
You can also try with stock ram frequency and keep the CL same but use the rule

My oppinion
Stock clocks and stock CL but using the rule will allow the RAM to operate with less error and run more smooth
Giving increace in performance (ignoring that it can be slower in bench marks)

http://www.overclockers.com/forums/showthread.php/741122-Perfect-Ram-Timing-Rule

Keep in mind lower numbers means higher ram performance

CL depends on your ram performance

You can single clock down CL for quick RAM tune up
leaving everything else stock

1T will give higher performance
2T will give higher RAM frequency
3T will give higher RAM frequency

Find the balance between 1T or 2T memory clock capability giving you best performance thumb.gif


1. TRAS=TCL+TRCD+TRP

2.TRC=TRAS+TRCD Or Tras+TRP Or Tras +CL

3.TWR=TRTP+TCL Or TRTP+TRCD

4.TFAW=TRRD+TWTR+TCWL+TRTP+TWR (TWR which stays the same with the twr rule TRTP+TRCD)

5.Ratio Rule for TCL-TRCD-TRP is 9-10-8 (Cl Lowest-TRCD Highest-TRP Middle)

6.Ratio Rule for TFAW (Back Timings) TRRD+TWTR+TCWL+TRTP (TRRD lowest, TWTR mid low, TCWL mid high TRTP highest)
Which TRRD is simular to CL which decides the RAM operating speed

7.Decreacing TRC and TRAS by -1 to -20 can increase ram write performance
Depending on how much it can take thumb.gif Normally manufacture uses -3 TRC and TRAS

8.Higher TRCD and higher TRP should give higher frequency also trc and tras needs to be changed

(TFAW timing rule hasn't been tested in overclocking yet, this is only an test theory which I will use in overclocking my RAM on the fxa990 gd80 msi
I also need to check by looking at the ram timing setting avalible in my FXA990 GD80 MSI before I can be fully sure that it is right for the back timings
Also I need to upload a ram timing table screen shot of my MSI BIOS later on)

Recomended Rule to use
TRAS=CL+TRCD+TRP

TRC=TRAS+TRP

TWR=TRTP+TRCD

TFAW=TRRD+TWTR+TCWL+TRTP+TWR

Depending on RAM module it will only operate on certain Row Refresh Cycle frequencys, there are 2 or 4 ramtimings for this,80ns, 160NS or 300NS or 350NS (DDR3 RAM)
Example 1600 RAM runs on 160NS, 2400RAM will not run below 300NS even at 1600 speeds
You will want to try out 300NS or higher when your overclocking FSB allot. As you may be able to break your FSB barrarier by setting this higher.

For 1T2T timings, you will need to set it at 2T for high FSBS, unless it operates with the FSB clocked.
Again setting 2T or 3T or higher can break your max FSB barrier

Using CL ratio rule and back timing ratio rule
Higher TRCD and higher TRP should give higher frequency also trc and tras needs to be changed

For back timing Twr and TRRD is bascally simular thing to CL and you need to read before you write
Meaning that trrd must run faster than twr
RAM speed can be modeled by CL divided by MHZ, lower numbers result in faster RAM
10/2400=0.00416
8/2133=0.00375, which means CL8 2133 is faster than Cl10 2400

For fastest ram speeds, aim for lowest CL and lowest TWTR and TRRD
Lower CL means faster RAM, lower numbers means faster timmings.

Tras= CL+TRCD+TRRD

TRP= your RAM speed Example 2400RAM will need a setting of 12 or higher
2133 will Need a setting of 11
Thus 13X2=26X100=2600, therefore to run 2600 RAM this timing must be 2600 Or higher
(note that TRCD shouldn't be smaller than TRP, it should be equal or higher)
You should increace TRCD when small amounts of stabibility is needed, because the speeds are to fast for the ram to handle. You can also manually add 1 clock to TRAS and TRFW, therefore stabibility will increace, as there is a 1 clock or more delay for stuff to finish before going onto next step

TRC= TRAS+ TRCD
You need to have a certian number of TRAS and TRFC to run certain frequencies, you may want to leave it as cl+2X tTRCD then try CL+TRCD+TRRD(EG the 2400 tidrent X needed 30-42 minimum to run stalbe)

TRRD Must Be smaller than TWTR, Typically TWTR should be 1 click higher than TRRD
TRRD= 20
TWTR=21
(These are bascally read write time CL Depping on how much your RAM can take, the lower you can set it the faster it is)

TWR =Manually specify for performance, Typically 2clocks higher than TRRD should be the fastest setting. Depends on how fast your ram can run.
Typically the minimum TRTP setting on a DDR3 RAM is 5 clocks, unless you BIOS mod you cannot go lower. As the name implies Time Read To Precharge and Time Wrte to Load, it is the diffrence in your TRRD and TWTR timming compared with TWR For DDR3 a typical TWR setting is TRRD+TWTR=TWR

TWL= TWR minus Twtr
TRTP= TWR minus TRRD
TFAW=TWR+TRRD

Typically, If your CL can be set at CL7, your TRRD should be able to run at 5 or lower.
It is best to have TWTR one click lower than CL ( TWTR at 6).
TRRD+TWTR can be even lower when you want a higher OC. But it shouldn't get you far, as your CL timing will be bottle necking your very fast TRRD and TWTR, in terms of stabibility and performance, CL at 20 means your TRRD should be at 18 and TWTR should be at 19

Command Rate depends on your RAM module, Lower numbers are faster
(setting this at 2T or higher can yeild higher max FSB OC)

TRFC0,1,2,3,4 Depends on RAM module, lower numbers are faster
(setting this at 350NS or higher can yeild higher max FSB OC)



Ram can operate with approximatly a +- 3 timings from optimal timing,
But TRRD must be smaller than TWTR, no tollerance for that. You can try your self and you will find out. make TWTR lower than TRRD and you will not boot up biggrin.gif


Refer to image, It is also a example of a perferct 2133 RAM oc setting


http://valid.x86.fr/hf3j77 Vadilation of the system with this timing (Its a Gskill 2400CL10 2X8GB water cooled)

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post #2 of 36 (permalink) Old 01-18-2015, 01:24 PM
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post #3 of 36 (permalink) Old 01-18-2015, 01:53 PM
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post #4 of 36 (permalink) Old 01-18-2015, 02:02 PM
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This guy made a thread earlier stating that somehow he was gonna get some Chinese semiconductor cooperation to build some sort of super CPU he designed that can scale infinitely. I'm not to sure about this guy. He seems like a troll. Time will tell

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post #5 of 36 (permalink) Old 01-18-2015, 10:27 PM - Thread Starter
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Quote:
Originally Posted by Alastair View Post

This guy made a thread earlier stating that somehow he was gonna get some Chinese semiconductor cooperation to build some sort of super CPU he designed that can scale infinitely. I'm not to sure about this guy. He seems like a troll. Time will tell

on 12/16/14Infraction: Trolling (4 points / 90 days) issued by DizZz
Status: Active
Projected Expiry Date: 3/16/15
Forum Post: /t/1530368/i-wanna-design-japanese-cpu-made-in-nec#post_23278424

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post #6 of 36 (permalink) Old 01-19-2015, 02:26 AM
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post #7 of 36 (permalink) Old 01-19-2015, 03:16 AM
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You will appreciate his build log.

Some of this post actually is true, however explanations and reasoning are scarce, often questionable and/or wrong.
Looks good. But OP must remember. That if half of his posts end up being troll posts it only makes him half believable. So now while all this looks interesting. Is it true? Does it work? Can people verify? And can OP give practical examples so that we can see how his theories would work in practice?

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post #8 of 36 (permalink) Old 01-19-2015, 04:21 AM
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I was uploaded it years ago 12-18-13

From another overclocking website
Conversation can be OFFENSIVE


I recomend using this rule when you are overclocking so hard that all of your timings needs to be changed to increace overcloking freedom thumb.gif

You can also try with stock ram frequency and keep the CL same but use the rule

My oppinion
Stock clocks and stock CL but using the rule will allow the RAM to operate with less error and run more smooth
Giving increace in performance (ignoring that it can be slower in bench marks)

http://www.overclockers.com/forums/showthread.php/741122-Perfect-Ram-Timing-Rule

Keep in mind lower numbers means higher ram performance

CL depends on your ram performance

You can single clock down CL for quick RAM tune up
leaving everything else stock

1T will give higher performance
2T will give higher RAM frequency
3T will give higher RAM frequency

Find the balance between 1T or 2T memory clock capability giving you best performance thumb.gif


1. TRAS=TCL+TRCD+TRP

2.TRC=TRAS+TRCD Or Tras+TRP Or Tras +CL

3.TWR=TRTP+TCL Or TRTP+TRCD

4.TFAW=TRRD+TWTR+TCWL+TRTP+TWR (TWR which stays the same with the twr rule TRTP+TRCD)

5.Ratio Rule for TCL-TRCD-TRP is 9-10-8 (Cl Lowest-TRCD Highest-TRP Middle)

6.Ratio Rule for TFAW (Back Timings) TRRD+TWTR+TCWL+TRTP (TRRD lowest, TWTR mid low, TCWL mid high TRTP highest)
Which TRRD is simular to CL which decides the RAM operating speed

7.Decreacing TRC and TRAS by -1 to -20 can increase ram write performance
Depending on how much it can take thumb.gif Normally manufacture uses -3 TRC and TRAS

8.Higher TRCD and higher TRP should give higher frequency also trc and tras needs to be changed

(TFAW timing rule hasn't been tested in overclocking yet, this is only an test theory which I will use in overclocking my RAM on the fxa990 gd80 msi
I also need to check by looking at the ram timing setting avalible in my FXA990 GD80 MSI before I can be fully sure that it is right for the back timings
Also I need to upload a ram timing table screen shot of my MSI BIOS later on)

Recomended Rule to use
TRAS=CL+TRCD+TRP

TRC=TRAS+TRCD

TWR=TRTP+TRCD

TFAW=TRRD+TWTR+TCWL+TRTP+TWR

Using CL ratio rule and back timing ratio rule
Higher TRCD and higher TRP should give higher frequency also trc and tras needs to be changed

I won't question your other posts and honestly i don't really care about what others might think of you, so consider what i'm saying unbiased.
what are these times? read? write? what cycle of reading or writing? tCL(CAS) or tWR aren't simply the all read or write cycles times so...
in the same bank? in the same rank? under what circumstances? minimum or maximum?
Please be specific, some of rules that you mentioned are INCORRECT, so if possible explain how are you calculating these rules. thumb.gif

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post #9 of 36 (permalink) Old 11-19-2015, 01:12 AM - Thread Starter
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I won't question your other posts and honestly i don't really care about what others might think of you, so consider what i'm saying unbiased.
what are these times? read? write? what cycle of reading or writing? tCL(CAS) or tWR aren't simply the all read or write cycles times so...
in the same bank? in the same rank? under what circumstances? minimum or maximum?
Please be specific, some of rules that you mentioned are INCORRECT, so if possible explain how are you calculating these rules. thumb.gif

Triall and error method. + Reading what others say on ram timing. Like RAM timing guide. (they have rules and what each timing does)

Also new update, Depending on RAM module it will only operate on certain Row Refresh Cycle frequencys, there are 2 or 4 ramtimings for this,80ns, 160NS or 300NS or 350NS (DDR3 RAM)
Example 1600 RAM runs on 160NS, 2400RAM will not run below 300NS even at 1600 speeds

You will want to try out 300NS or higher when your overclocking FSB allot. As you may be able to break your FSB barrarier by setting this higher.

For 1T2T timings, you will need to set it at 2T for high FSBS, unless it operates with the FSB clocked.
Again setting 2T or 3T or higher can break your max FSB barrier

http://i204.photobucket.com/albums/bb205/maffraff/Tweaking/20409-10-10AMDOverdrive.png

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Overclocking is not about the pefromance gains, it is about the passion
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post #10 of 36 (permalink) Old 11-23-2015, 11:51 PM - Thread Starter
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Update, Timings fixed and I am 100% confident that it is correct biggrin.gif
Quote:
Originally Posted by Alastair View Post

Looks good. But OP must remember. That if half of his posts end up being troll posts it only makes him half believable. So now while all this looks interesting. Is it true? Does it work? Can people verify? And can OP give practical examples so that we can see how his theories would work in practice?

You can go try my timing rule and totally have your timming messed up, as long as that RAM speed isn't too high for the RAM to handle. Using the rule will result in manufactre quality timing, or even better

Overcloking is about the passion, not about how much you clock
Overclocking is not about the pefromance gains, it is about the passion
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