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ROG Crosshair VI overclocking thread - Page 1279

post #12781 of 17365
Thread Starter 
Btw, I updated the OP with current issues/solution/status. Let me know if you feel something is missing. Please note that I can't add every detail, let's stick to essential knowledge for users new to this thread.
post #12782 of 17365
Quote:
Originally Posted by nycgtr View Post

anyone here experience retardedly slow sata ssd speeds like 20mb/s regardless of ssd.

None here. Are you changing your base clock?
post #12783 of 17365
Hello

G.Skill 2 x 8GB 3550MHz 14-14-14 1T BIOS version 1107.







post #12784 of 17365
Quote:
Originally Posted by elmor View Post

Btw, I updated the OP with current issues/solution/status. Let me know if you feel something is missing. Please note that I can't add every detail, let's stick to essential knowledge for users new to this thread.

Can You write flashback Instruction in OP and mark as spoiler ??? Since with 1107 bios people cant EZ flash back and after that must have been 20-30 pages of people asking... HOW DO I FLASH BACK.
If i be doing Any Flashback ill record video and upload on my YT and leave it here for people.
post #12785 of 17365
Quote:
Originally Posted by Praz View Post

Hello

G.Skill 2 x 8GB 3550MHz 14-14-14 1T BIOS version 1107.








Jealous... rolleyes.gif
post #12786 of 17365
Two interesting observations made during memory overclocking (to its rated speed of 3200).

First: I think motherboard checks only the module in A2 or if populated in A1 socket, then assumes the other one is identical.
This means that if you have two modules, one can be "better" than the other and by swapping your modules you get second chance at a faster speed.
If you have four modules then you have four chances. Rotate each module to the A1 socket and record the best memory speed you can get.

Second: It is important to do a ProcODT "sweep" to find the sweet spot for your particular memory.


Actual process is rather lengthy, read on if you are interested or just trying to get your memory to go faster. Caveat: ability to run memory faster is CPU-dependent and as I found recently also (to a lesser degree) motherboard-dependent. I had a chance to try 1800X+same memory in another X370-Pro Asus board, and while the first X370Pro board allowed 3200, the second one only allowed 2933 (with 0515 BIOS; 0604 made memory speed lower).

A bit of background: my kit is 2x8GB Hynix M-die (per Thaiphoon) TridentZ 3200-16-18-18-38, single rank (per CPUz), F4-3200C16D-16GTZB
I will call it KIT1. It runs merrily at 3200-14 with 1800X and C6H with 0083 BIOS. Some examples are below. Notation is not completely self-explanatory, but 4000 usually means CPU speed and 2133-3200 usually means memory speed. BIOS settings that are not Auto are also shown. "BIOS ok" means that after a F10 reboot the system booted to BIOS.
Also are shown CB15 and CPUZ1.79 scores, best out of three runs.
4000@1.368V; 3200@1.35V, SB 1.087V, 16(18)38 CB 1766 CPUZ 4974
4000@1.368V; 3200@1.38V, SB 1.087V, 16(16)36 CB 1771 CPUZ 4976
4000@1.368V; 3200@1.39V, SB 1.087V, 14(16)36 CB 1760 CPUZ 4976

So I picked up another pair of these TridentZ at a local microcenter on clearance for $107 mainly with an intent to see how four modules from different kits work together and also how BIOS 0083 vs 1107 differ in running four memory sticks. However, I have read reports that 1107 is not too kind to four-module memory and decided to wait with the secondary objective till the June BIOS with 1.0.0.5 AGESA. I will call the new one KIT2.

KIT2 plugged in - BIOS sees 8GB only. Windows sees 16GB.
3600@Auto; 2133@Auto, 15(15)36-1T 1609 4598
4000@1.368; 2133@Auto, 15(15)36-1T 1720 4968
2400@1.35V, SB 1.087, 16(18)38 - no BIOS boot
set DRAM BOOT 1.39V - no BIOS boot

KIT2 swapped - BIOS sees 16GB (lower serial number placed closer to CPU in A2 socket)*
* - this is coincidental only, just reporting the process; actual reason is poor memory seating in socket which was confirmed later
2400 BIOS ok 16(18)38-1T 1739 4974
2666 BIOS ok 16(18)38-2T 1751 4976
2933 BIOS ok 16(18)38-2T 1762 4973
3200 BIOS ok 16(18)38-2T 1768 4973
set DRAM BOOT to Auto. Default boot 2133 BIOS ok, BIOS retained 3200 setting, after F10 reboot BIOS ok.
set timing 16(16)36. Default boot 2133 BIOS ok, BIOS retained 3200 setting, after F10 reboot BIOS ok.
3200@1.38V 16(16)36-2T 1778 4974
3200@1.39V 14(16)36-2T 1771 4971
At this point I saw that KIT2 could run as fast as KIT1.
Windows Memory Diagnostic and Linux Memtester both found no problems with KIT2.

KIT2 in sockets (A2,B2) + KIT1 (A1,B1) - BIOS sees 32GB (for consistency KIT1 also lower serial number in A1 near CPU)
2400 BIOS ok 16(18)38-2T 1742 4972
2666 BIOS ok 16(18)38-2T 1753 4968
2933 - no BIOS boot
set DRAM BOOT 1.39V - no BIOS boot
set DRAM 1.38V - no BIOS boot
set ProcODT 80 Ohm, Fail Cnt 2 - 2133 default boot, then after F10 no boot.
set ProcODT 96 Ohm, Fail Cnt 2, DRAM BOOT 1.39V, DRAM 1.38V - 2133 after boot cycle, then after F10 no boot.
set ProcODT 68 Ohm, Fail Cnt 2, DRAM BOOT 1.39V, DRAM 1.39V - 2133 after boot cycle, then after F10 no boot.

At this point I was about to give up on the KIT2 and wrote down my fan speeds configuration before a flash to 1107 but decided to sleep on it.
KIT1 was replaced to A2,B2 and some BCLK tests were done. My BCLK rabbithole doesn't go too deep, presumably because of M.2 storage.
BCLK 102.2, core 1.387V, DRAM 1.385V CB crash CPUz 5092
BCLK 101.6, core 1.368V, DRAM 1.38V CB crash CPUz 5060
BCLK 101.0, core 1.368V, DRAM 1.38V CB crash CPUz 5032

Next day both kits were tested together again
KIT1 (A2,B2)+ KIT2 (A1,B1) - 2133 default boot
CPU kept at 3600, core volts Auto, SB 1.087V, DRAM BOOT 1.39V, DRAM 1.35V, 16(18)38, 2400 - no boot
swaped the kits
KIT2 (A2,B2)+ KIT1 (A1,B1) - 2133 default BIOS ok
CPU kept at 3600, core volts Auto, SB 1.087V, DRAM BOOT 1.39V, DRAM 1.35V, 16(18)38, 2133 - BIOS ok
2400 BIOS ok
2666 BIOS ok
set ProcODT 60 Ohm BIOS ok
2933 - no boot
default boot 2133 ok
set SB 1.087V, DRAM BOOT 1.39V, DRAM 1.35V, 16(18)38, 2400 - BIOS ok
2666 BIOS ok
set ProcODT 53 Ohm BIOS ok
2933 - no boot
default boot 2133 ok
set SB 1.087V, DRAM BOOT 1.39V, DRAM 1.35V, 16(18)38, 2666 - BIOS ok
set ProcODT 48 Ohm BIOS ok
set 18(18)38, DRAM 1.39V BIOS ok
2933 BIOS ok **
** - This was the Aha moment. Apparently not all memory kits like 96, 80 or even 53 Ohms. I continued with the ProcODT sweep.

set ProcODT 43 Ohm BIOS ok
set ProcODT 40 Ohm BIOS ok
set ProcODT 36 Ohm BIOS ok
set ProcODT 34 Ohm BIOS ok
set ProcODT 32 Ohm - boot cycles
default boot 2133 ok
set SB 1.087V, DRAM BOOT 1.39V, DRAM 1.39V, 18(18)38, 2933, ProcODT 53 Ohm BIOS ok
set ProcODT 60 Ohm BIOS ok
set ProcODT 68 Ohm - boot cycles
Now I know the ProcODT range from 34 to 60 Ohm. The one in the middle is 43 Ohms. ***
*** - someone with a degree in electrical engineering may say it scales exponentially, not linearly - please comment if there's a better way to pick a on-die termination resistance sweet spot.

set SB 1.087V, DRAM BOOT 1.39V, DRAM 1.39V, 18(18)38, 2933, ProcODT 43 Ohm BIOS ok
set DRAM BOOT 1.395V, DRAM 1.395V, 20(20)40, 3200 BIOS ok 1641 4599

cold boot (remove power plug) - CMOS loses the ProcODT setting. Default boot to 2133 memory speed. All other settings were retained in CMOS. After a reset to 43 Ohms BIOS ok
4000@1.368V; 3200@1.395V, SB 1.087V, 20(20)40 CB 1766 CPUZ 4973 - with four modules 32 GB Hynix M-die running at 3200.

Next is optimization of timings, voltages, etc. Hope this helps someone who is stuck at 2133 or 2666.
post #12787 of 17365
Thread Starter 
Quote:
Originally Posted by Praz View Post

Hello

G.Skill 2 x 8GB 3550MHz 14-14-14 1T BIOS version 1107.








Awesome thumb.gif

Quote:
Originally Posted by lordzed83 View Post

Can You write flashback Instruction in OP and mark as spoiler ??? Since with 1107 bios people cant EZ flash back and after that must have been 20-30 pages of people asking... HOW DO I FLASH BACK.
If i be doing Any Flashback ill record video and upload on my YT and leave it here for people.

Good suggestion, send me the link when you're done. Include that you need the CPU installed on C6H in order to be able to use USB BIOS Flashback.
post #12788 of 17365
@ elmor

Cool when next bios hits us I will flashback it in and record the whole thing. Maybe wont be super professional but ill comment step by step for people.
post #12789 of 17365
Thread Starter 
Quote:
Originally Posted by lordzed83 View Post

@ elmor

Cool when next bios hits us I will flashback it in and record the whole thing. Maybe wont be super professional but ill comment step by step for people.

Thanks, I appreciate the help smile.gif
post #12790 of 17365
@elmor

Will the official bioses be always at 1T like 1107? I have 4 x 8GB Hynix can run at 2933Mhz (Bclk 100) with 2T Bioses even at default 1.35V and soc 0.89V . But 1T bioses don't let me pass 2133 redface.gif .
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