Announcement

Collapse
No announcement yet.

Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

Collapse
This is a sticky topic.
X
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • #61
    Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

    Thanks, Will do

    Memtest86+ 2.10 is about to come out here pretty soon as well. If you find it before I notice let me know >>>
    http://forum.canardpc.com/showthread.php?t=30178

    Comment


    • #62
      Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

      Originally posted by Lsdmeasap View Post
      Write to Precharge Delay (tWR)________ 3-5 (Note Actual Value set in BIOS Vs. What system Uses will be 5+)
      This is from your first post in this topic, it appears to be 3+ here instead of 5+
      Other deviations seem correct.
      Primairy system: GA-EP45-DS4 / E8400 C0 / 2x2GB OCZ ReaperX PC8000 / Sapphire HD5870 / Creative Xfi Xtrememusic PCI / Intel Postville 160GB for OS & Programs / Antec Neopower 650w / Antec 900 / Windows7x64pro RTM (build7600)

      Comment


      • #63
        Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

        Hmm, I do not get that with any of my three boards, you sure you are looking at the right one in the BIOS and Memset?

        Comment


        • #64
          Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

          Originally posted by Lsdmeasap View Post
          Hmm, I do not get that with any of my three boards, you sure you are looking at the right one in the BIOS and Memset?
          It appeared i made a mistake here by telling the tWR (Write to Precharge Delay / Write Recovery Time) is +3.... After trying many different values it seems to be +7 here (still not +5) just like the tWTR is.

          Found something else:
          Originally posted by Lsdmeasap View Post
          Rank Write to READ Delay (tWTR)_______ (4-6) 9-11 (Note Actual Value set in BIOS Vs. What system Uses will be 7+)
          the 4-6 should be 2-4... or
          the 9-11 should be 11-13

          If that is meant set value vs. real value
          Last edited by MadDoGz; 11-13-2008, 03:56 AM.
          Primairy system: GA-EP45-DS4 / E8400 C0 / 2x2GB OCZ ReaperX PC8000 / Sapphire HD5870 / Creative Xfi Xtrememusic PCI / Intel Postville 160GB for OS & Programs / Antec Neopower 650w / Antec 900 / Windows7x64pro RTM (build7600)

          Comment


          • #65
            Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

            Those tWTR timings above are both ranges, 4-6 and 9-11. Meaning both of those may be acceptable and the user should bench each range. Value is +7 from what you set

            tRTP is +3

            tWR is + 5

            I will post you some images here in about 45 minutes once this download I am running is done so you can see. I wrote this for P35 using 2.00 Multi as most did then, I have not actually checked for sure with P45 the exact values but I am pretty sure it is the same.

            Actually this variance does differ at different Memory Dividers as well. Al values are not 100% Predefined some are taken as set value plus other timings, and some even more in-depth reasons behind the value shown. And all boards vary with certain things, so he could not make it work 100% the same for everyone's boards

            Here is how the values are obtained for tWR and tWTR, Quoted from Felix at XS forum the creator of the program >>>>

            For the Write Recovery time and the write to Read delay, bios and memset are right; I explain:

            Write Recovery time and Write to Read delay are internal dram timing.
            There values are usually 3 to 8 for Write Recovery time and 2 to 6 for Write to Read delay.
            But memset don't report these value, memset report Write to Precharge delay and Write to Read command delay.

            Here is how these value are calculated by the chipsets:

            Write to Precharge = Cas - 1 +BL/2 + tWR.
            Write to read command = Cas - 1 +BL/2 + tWTR.
            BL(Burst Lenght) practically always 8.
            tWR(Write recovery time) is 3 for ddr or ddr2/400 and 4 for ddr2/533, 5 for ddr2/667-800.It's can vary.

            For example, If your have ddr2/533 and your Cas latency is 4,Write Precharge = 4-1+(8/2)+4=11.

            It's the reason that memset report higher values than the bios.
            You can see here at page 114 for Intel explanations.
            XtremeSystems Forums - View Single Post - New memory tweaker for chipsets Intel.

            MANY Beta versions are available in this thread if you would like to play around with them, you may also ask Felix anything you like and he will reply once you join (If you do not have a good email, use the below site for a login. There is a Guest account but I cannot remember the login) >>>
            XTREMESYSTEMS.ORG passwords - login with these free accounts to bypass compulsory web registration - Bugmenot.com

            Latest Beta ( Correctly Picks DDR2 ) >>>>
            http://www.tweakers.fr/download/MemSet359beta.exe

            P45 Pre Post Edit. I find P45 to use the following (At least for what I am Testing right now) >>>


            tRTP + 2
            tWTR + 8
            tWR + 8

            As shown here with the 400 MCH Strap W/2.00 Multi (No time to test 2.66 Multi) >>>>



            __________________________________________________ ______

            2.00 Multi ______________ 2.40 Multi
            tRTP + 2 _______________ tRTP + 2
            tWTR + 7 ______________ tWTR + 8
            tWR + 7 _______________ tWR + 8

            As shown here with the 333 MCH Strap W/ 2.00 and 2.40 Multi >>>>



            So all in all, it depends on your chipset and what strap and multi you are using. So it will always vary from board to board and speed to speed. I basically added that to the original post when I posted this thread because MANY users PM'd me about why what they set was not applied. I actually did not know it varied so much between various settings

            Comment


            • #66
              Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

              CPU-Tweaker 1.0-beta1

              New memory tweaker,support only Nehalem and AMD K10 CPU (with integrated Memory Controller).

              CPU-Tweaker 1.0-beta1
              (Bug-->2x1024)
              Last edited by stasio; 11-23-2008, 04:13 AM.

              Comment


              • #67
                Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

                Everyone should just follow the very simplified memory tweaking page..... very few adjustments required to be set manually in the Bios for great performance.

                At default Bios settings I was running 14+sec. Super Pi 1M. Just by reading the memory tweaking page I brought that down to 12.4 sec. A few PM's later and I'm at 11.4sec SuperPi 1M times. My memory timings are still very looooooose with my 2 x 1gb HZ's (5-5-5-15) as I have a 2 x 2 kit of G.Skills on the way and I figure the timings will need to be there anyways when they arrive. I've run the HZ's at 4-4-4-12 up to DDR-1000 on another board, so I know they have headroom here @ 5-5-5-15.

                Biggest improvement was setting static tread to manual and tweaking the setting (my happy spot is 9- tried 7 and it was a bit flakey). 9 is right in the middle of the road for DDDR-800/1000 and DDR-1066+. Static tread phase adjust settings were all set from auto to manual (@0) and my board is very happy right now. Stable as all get out @ 4009mhz (9.5 x 422FSB w/ 2.00D multiplier for 1:1 memory settings). Memory (HZ's) are at stock w/ 2.1v. When my 2 x 2 kit gets here I'll go for broke ;)

                I've never had support as good as on this forum.... only ones even remotely close were DFI and they took hours to reply... not minutes like here.

                Kudos to Gigabyte!! Gigabyte for life!!
                Last edited by cdelong; 11-25-2008, 04:30 AM.

                Comment


                • #68
                  Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

                  OK.... G.Skill 2 x 2gb PI's are from my G.Skill 2 x 1gb HZ's. Results look promising as a quick comparison. HZ's were 11.3sec. in SuperPi 1Meg..... PI's I have gotten to 11.6sec. 1Meg!!

                  Funny how Memset sees both pairs as DDR3?? Oh well.... a bug I guess?

                  LSD.... attached is a Word doc w/ my current memory settings- and you can see my one stuck sensor @ 42C

                  How do I stop my CPU from being throttled down when not loaded??
                  Attached Files
                  Last edited by cdelong; 11-28-2008, 06:54 AM.

                  Comment


                  • #69
                    Re: Memory Timings Explained W/ Suggested Timings & Memset VS. BIOS

                    For those that don't have MS Word...

                    MB Intelligent Tweaker(M.I.T.)
                    Robust Graphics Booster ...............: [Auto]
                    CPU Clock Ratio ...........................:9x
                    Fine CPU Clock Ratio.....................:+0.5
                    CPU Frequency .............................:4.00Ghz (422x9.5)

                    Clock Chip Control
                    Standard Clock Control

                    CPU Host Clock Control..................: [Enabled]
                    CPU Host Frequency (Mhz) ............: 422 Mhz
                    PCI Express Frequency (Mhz) .........: Auto
                    C.I.A.2 ...........................................:[Disabled]

                    Advanced Clock Control [Press Enter]
                    CPU Clock Drive...........................: 800 mv
                    PCI Express Clock Drive................: 900 mv
                    CPU Clock Skew ..........................: 50 ps
                    MCH Clock Skew .........................: 100 ps

                    DRAM Performance Control
                    Performance Enhance...................: [Standard]
                    X.M.P………………………………………………..: [Auto]<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>

                    (G)MCH Frequency Latch...............: [Auto]
                    System Memory Multiplier ..............:[2.00D]
                    Memory Frequency (Mhz) ...............:800
                    844
                    DRAM Timing Selectable ................: [Manual]

                    Standard Timing Control
                    CAS Latency Time........................: 6 [4]
                    tRCD ......................................... 6 [4]
                    tRP'........................................... 6 [4]
                    tRAS.......................................... 18 [12]

                    Advanced Timing Control
                    tRRD........................................... 3 [4]
                    tWTR.......................................... 3 [4]
                    tWR............................................ 6 [8]
                    tRFC........................................... 52
                    tRTP........................................... 3 [4]
                    Command Rate (CMD) ....................:0 [2]

                    Driving Strength Profiles
                    Driving Strength ............................ [Auto]
                    Static tRead Value.........................: 8
                    tRD Phase0 Adjustment...................:1 [Auto]
                    tRD Phase1 Adjustment...................:0 [Auto]
                    tRD Phase2 Adjustment .................:0 [Auto]
                    tRD Phase3 Adjustment..................:0 [Auto]
                    Trd2rd(Different Rank)....................:6 [Auto]
                    Twr2wr(Different Rank)...................:6 [Auto]
                    Twr2rd(Different Rank)...................:5 [Auto]
                    Trd2wr(Same/Diff Rank)..................:8 [Auto]
                    Dimm1 Clock Skew Control...............:[Auto]
                    Dimm2 Clock Skew Control...............:[Auto]
                    DDR write training..............................[Auto]

                    Motherboard Voltage Control
                    Load Line Calibration........................[Disabled]
                    Voltage Type.………... [Auto]

                    CPU
                    CPU Vcore….……….........................: 1.38125v
                    CPU Termination…..... ......................:1.280V
                    CPU PLL………………….....................:1.3500V
                    CPU Reference.…………........................:0.760V [Auto]

                    MCH/ICH
                    MCH Core……………....1.3v
                    MCH Reference….…….Auto
                    MCH/DRAM Ref.…...... 0.910v
                    ICH I/O……………….....1.570V
                    ICH Core…………...……1.200V

                    DRAM
                    DRAM Voltage ……....2.0v (PI Blacks rated 1.8- 1.9v)
                    DRAM Termination .…0.910V- will not let me select 0.900v??
                    Channel A Reference 0.910V “
                    Channel B Reference 0.910V “
                    Last edited by cdelong; 11-28-2008, 02:46 AM.

                    Comment


                    • #70
                      Re: Memory Timings Explained W/ Suggested Timings &amp; Memset VS. BIOS

                      I have updated Memset link with newest Beta that fixes that DDR2/3 issue, grab the link on the front page

                      Comment


                      • #71
                        Re: Memory Timings Explained W/ Suggested Timings &amp; Memset VS. BIOS

                        This is probably as good as it get for me..... Maybe 50 more mhz, but thats it... Not posted here, but SuperPi 1M is back down to 11.5 seconds w/ 2 x 2gb of DDR800 ;)
                        Last edited by cdelong; 12-07-2008, 12:05 PM.

                        Comment


                        • #72
                          Re: Memory Timings Explained W/ Suggested Timings &amp; Memset VS. BIOS

                          LSD... backed off on the momory a touch. Heres the most recent stable timings so far. Changes highlighted in red.

                          MB Intelligent Tweaker(M.I.T.)
                          Robust Graphics Booster ...............: [Auto]
                          CPU Clock Ratio ...........................:9x
                          Fine CPU Clock Ratio.....................:+0.5
                          CPU Frequency .............................:4.03ghz (425x9.5)

                          Clock Chip Control
                          Standard Clock Control
                          CPU Host Clock Control..................: [Enabled]
                          CPU Host Frequency (Mhz) ............: 425 Mhz
                          PCI Express Frequency (Mhz) .........: Auto >> 100
                          C.I.A.2 ...........................................:[Disabled]

                          Advanced Clock Control [Press Enter]
                          CPU Clock Drive...........................: 900 mv
                          PCI Express Clock Drive................: 900 mv
                          CPU Clock Skew ..........................: 50 ps
                          MCH Clock Skew .........................: 100 ps

                          DRAM Performance Control
                          Performance Enhance...................: [Standard]
                          X.M.P………………………………………………..: [Auto]
                          (G)MCH Frequency Latch...............: [400]
                          System Memory Multiplier ..............:[2.00D]
                          Memory Frequency (Mhz) ...............:800 850
                          DRAM Timing Selectable ................: [Manual]

                          Standard Timing Control
                          CAS Latency Time........................: 6 [4]>> 5
                          tRCD ......................................... 6 [4]
                          tRP'........................................... 6 [4]
                          tRAS.......................................... 18 [12]

                          Advanced Timing Control
                          tRRD........................................... 3 [4]
                          tWTR.......................................... 3 [4]
                          tWR............................................ 6 [8]
                          tRFC........................................... 52 [58]
                          tRTP........................................... 3 [4]
                          Command Rate (CMD) ....................:0 [2]

                          Driving Strength Profiles
                          Driving Strength ............................ [Auto]>> 800
                          Channel A & B
                          Static tRead Value.........................: 8>> 9
                          tRD Phase0 Adjustment...................:1 [Auto]
                          tRD Phase1 Adjustment...................:0 [Auto]
                          tRD Phase2 Adjustment .................:0 [Auto]
                          tRD Phase3 Adjustment..................:0 [Auto]
                          Trd2rd(Different Rank)....................:6 [Auto]
                          Twr2wr(Different Rank)...................:6 [Auto]
                          Twr2rd(Different Rank)...................:5 [Auto]
                          Trd2wr(Same/Diff Rank)..................:8 [Auto]
                          Dimm1 Clock Skew Control...............:[Auto]
                          Dimm2 Clock Skew Control...............:[Auto]
                          DDR write training..............................[Auto]

                          Motherboard Voltage Control
                          Load Line Calibration........................[Disabled]
                          Voltage Type.………... [Auto]

                          CPU
                          CPU Vcore….……….........................: 1.3875v
                          CPU Termination…..... ......................:1.280V
                          CPU PLL………………….....................:1.3500V
                          CPU Reference.…………........................:0.760V [Auto]

                          MCH/ICH
                          MCH Core……………....1.3v>> 1.2v
                          MCH Reference….…….Auto
                          MCH/DRAM Ref.…...... 0.910v
                          ICH I/O……………….....1.570V
                          ICH Core…………...……1.200V

                          DRAM
                          DRAM Voltage ……....2.0v (PI Blacks rated 1.8- 1.9v)
                          DRAM Termination .…0.910V- will not let me select 0.900v??
                          Channel A Reference 0.910V “
                          Channel B Reference 0.910V “
                          Last edited by cdelong; 12-07-2008, 12:17 PM.

                          Comment


                          • #73
                            Re: Memory Timings Explained W/ Suggested Timings &amp; Memset VS. BIOS

                            Set it to auto then >>>
                            DRAM Termination .…0.910V- will not let me select 0.900v??

                            Why 544-12 at 840? Did it fail at 444-12? Hmm, have you tested maybe tRD 8 again, but with a bit more MCH

                            Comment


                            • #74
                              Re: Memory Timings Explained W/ Suggested Timings &amp; Memset VS. BIOS

                              It didn't fail anything... except the BSOD issue we've been PM'ing about.

                              I loosened up the ram a touch to see what would happen.

                              On the MCH... my buddy has the board clocked to the max and has yet to go over 1.1v, so I thought 1.2v would cover me.

                              I'm taking any tweaks slowly since this beast is stable all around at 3.99Ghz right now.

                              Comment


                              • #75
                                Re: Memory Timings Explained W/ Suggested Timings &amp; Memset VS. BIOS

                                Edited post #71.... Back to 4.038ghz 24 hour Prime 95 stable and all around stable with graphics apps. as well.

                                I'm not sure what exact change made it more stable, but I'm going to try 4-4-4-12 again instead of 5-4-4-12 where I am currently stable as a rock. After that back to Static Tread of 8 possibly.

                                From there I'll drop down on the Vcore although temps are not an issue at all on WC'ing.

                                Comment

                                Working...
                                X