F3-17000CL11Q2-64GBZLD + Gigabyte GA-X79-UP4 + 3930K CPU

[paul.pech]

Hi

I'm trying to get to 2133 MHz with 64GB RAM on the board mentioned in the subject (board rev 1.0; BIOS F2 - but same results with beta BIOS F3p).

I've tried enabling XMP Profile 1 oder Profile 2, but I'm not able to boot with the XMP profiles (board shuts down, starts, shuts down, ...; I've got to reset BIOS to start again; this also happens if only 4 modules are used).

I've then tried manually setting 2133 MHz, increased DDR voltage to 1.65V and VTT to 1.15V:

RAM Voltage



VTT



I used the following timings



No matter whether I use 4 or 8 modules, the system boots but immediately enters BIOS because of OC failure.

I can run 8 modules when I set them to 1866 MHz. Is it at all possible to run 64GB @ 2133MHz with this board?

CPU always runs at stock speed.

Any help is greatly appreciated!

Yours


Paul

[Tradesman]

2133 will require an OC, prob need tRFC up to 278 or so for 32 GB, Vtt up to 1.20 (maybe even a tad higher) and try that initially with 4 sticks and see how it goes, then let me know

[paul.pech]

Thanks for replying.

I've tried with 4 and 8 modules, but there is no big difference. If I set

CAS 11
tRCD 11
tRP 11
tRAS 33
tRFC 278 (tried max 320)
Vtt 1.2 (tried max 1.3)
IMC 1.0 (tried max 1.1)
DRAM 1.6 (tried max 1.65)
tCMD 2

I will sometimes be able to boot (about 50% of the time; more often if only 4 modules are used) and even start OS or memtest. But starting prime95 will fail immediately.

But for the fist time I was able to boot with 2133MHz. Maybe there are some other tweaks I could try?

Would you recommend trying 2133, if I want to get it stable 24/7 or better settle with 1866 (prime95 runs for 6h+ and memtest for 12h+)? I get 47500 MB/s with 1866MHz and 49500 MB/s with 2133MHz.

When using 1866 MHz and tCMD=1 (9-9-11-24) I can get close to 49500 MB/s but it's not stable. Maybe this can be tweaked a bit to get it going?

[Tradesman]

Let's stay at 2133 for the moment and try tRRD 5, tWTR 6, tRTP 6 and tFAW 24

[GSKILL TECH]

tRC 42
tRRD 6
tWTR 7
tWR 14
tRFC 350
tRTP 7

Manually input these and see how it works.

Also, CPU VTT and IMC may need to be raised more for 64GB of DDR3-2133.

Thank you
GSKILL TECH

[paul.pech]

Thank you Tradesman and GSkill for replying.

I have tried both your settings but none of them work. I also tried raising them further but to no avail. Even with 1866 MHz I'm not able to boot (most of the time) using these settings. If I revert every setting back to "auto" (including voltages) I'm able to boot with 9-9-11-24 @ 1866.

I've noticed one thing though: I cannot manually enter a value greater than 32 for rRC. As soon as I do, BIOS will revert it back to "auto" (strangely enough, the auto setting seems to be 33...).

It's not a big deal, I'm happy the with the RAM @ 1866 (1.5V), CPU @ 4.1 MHz (1.25V core) , everything else unchanged. It's really stable, prime95 runs for 10h+. [I did not use CPU OC when trying your setting].

Cheers

Paul

[Tradesman]

Might contact GB and see if they have a BIOS update in the works or ask what they suggest

[paul.pech]

I've sent the following report to Gigabyte:

---quote---

Dear Sirs,

I might possibly have an issue with your current BIOS F2 (including beta BIOS F3p).

I'm not able to manually set values for tRC greater than 32. As soon as I do, BIOS will revert it back to "auto" (strangely enough, the auto setting seems to be 33...).

Before contacting you, I've tried to solve this with GSKILL. Please cf. here:

http://www.gskill.us/forum/showthread.php?t=12365

I was advised to bring this to your attention.

Is it at all possible to achieve 2133GHz with this brand of 64GB RAM?

Yours

Paul

--end quote---

[Tradesman]

Sounds good, odd they would have a limit on the tRC but have run into similar, had a couple of ASRock mobos that had a 255 limit on the tRFC and 32GB (2133 and up sets) sets typically require 278-314 for that timing. Let us know what they say

[paul.pech]

Sorry for the delay... On Tuesday (4/28) Gigabyte sent me a very swift and friendly reply. Attached was beta BIOS F3t with which I can set values greater than 32 for tRC.

Also I'm able to boot with XMP Profiles enabled (cf. OP). The following settings where used for Profile 1 (2133GHz):



tRFC was raised to 320 (and above), auto values should fit GSKILL's proposal in a previous post.

To be able to boot from a disk (hdd or cd), voltages were set to (no CPU OC):

RAM 1.56V

Vcore 1.2
PLL 1.85
Vtt 1.37
IMC 1.25

At times an OS can be booted and prime95 started. It may run 10-20 minutes but it will fail eventually, usually very quickly.

With only 4 modules, it will run considerably longer and voltages can be lowered (Vtt; IMC); I didn't have it running for longer than 2h, so I don't know whether it's really stable.

I've read somewhere that recommended max. for Vtt is 1.4 with H2O, but I'm on air (Noctua NH-U12P, 2x fan). It doesn't run very hot (about 76 °C w/ prime) but I'm little bit worried...

The point is: If I want it stable for 24/7, is there a good chance I can realize this with 64 GB @ 2133 and this hardware setup? As I've said earlier, I'm happy with 4.1 GHZ @ 1866.

Thank you Tradesman, GSkill and Gigabyte for your time and patience :-)

Any suggestions are still very welcome!

[Tradesman]

Might try raising the vCore, maybe 1.26 - 1.27 and see how that does, this will be of additional help to the MC that is located within the CPU

[attomic]

2133!

Hi folks thanks so much for posting this information. I am very new to memory tuning and this thread has been very helpful in pointing me in great directions of research on the subject.

I also have the x79-up4 with a 3930k and 64gb of RAM. I am currently running at 2133MHZ which is its rating! However it is not a 64gb kit. It is two 32gb kits. The model# is F3-2133C9Q-32GZH. I was having the identical problems paul.tech was having until I loaded the f3t bios. Using XMP Profile 1 the computer has been very stable. No other changes have been made in the BIOS.

CPU-Z gives me this info on the Memory:
Freq 1066.7MHz
FSBRAM 1:16
CL 9.0
tRCD 11
tRP 11
tRAS 31
tRFC 308
CR 2T

Not sure if this is helpful at all but I hope it helps. Thanks again for posting as I wouldn't have known about f3t otherwise.

[Tradesman]

Looking good, this should help others.