Best memory for Asus Rampage III Extreme

[jaquith]

Keep in mind the BCLK speed varies all the time, it's NORMAL, and ±10 MHz is NOTHING.

Also, there's rounding BCLK 133.33333 ± 3; 130 X 12 = 1560 ; 136 X 12 = 1632 ; therefore any number between 1560~1632 MHz is a nothing!

Duh, just noticed {I get CONFUSED with (2) people SAME POST}; is your RAM = CMT12GX3M3A2000C9 a/k/a 2000 MHz??

REMEMBER -> "Reason, unless you are going to OC at least 4+GHz the 2000 MHz will require {8/10} under-clocking to remain stable; that's the catch-22 of super-fast RAM. "

You need a BCLK of 180~200 to use the 2000 MHz RAM. Please confirm.

 

[Coamex]

No, my RAM is CMP12GX3M3A1600C9, which is 3x4GB 1600 MHz Corsair Dominator. I have my bclock at around 155. I did this using ASUS Vpower on WIndows. It seems to be stabel at the moment, but I don't know if I might be using more V than required in some settings.

Roger about the MHz, the thing that I find wierd is WHY it will fail as soon as it hits 1600 Mhz or a tad over it, but not below!? I want to be able to get my system to 4 GHz, thats all Im asking for, I don't want to go super crazy, just want a reasonable and no-harm OC with my memory at 2000 MHz if I buy that one. You think its possible? I have a i7 980X, R3E, Megahalems w/ Delta 3400 RPM fan (100+ CFM). Please advise.

Also, I'm considering this memory to replace my current one:
G. Skill F3-16000CL9T-12GBRM
Corsair CMT8GX3M2A2000C9 (Newegg ran out of the 12GB kit for this one, so I think I just buy this one and add to it in the future)

Please advise about the memory selection. I was thinking on trying the G.Skill just to make sure that it is not the memory by trying 2 completely different sets.

Thank you as always for your great help.

 

[jaquith]

9.9/10 it's your BIOS settings. What EXACT BIOS settings have you 'changed?' Please list here:

 

[Coamex]

I will do as soon as I get home from work...I can't remember all the settings from memory. Also, any advice on the memory?

Thank you again. (It will be a while since I can get those settings for you).

 

[jaquith]

The MAJOR Problems with this post is 1600 vs 2000 MHz require (2) COMPLETELY Different Approaches. If you or I make the mistake of confusing one or the other the RESULT is WRONG settings. Therefore, PLEASE open a NEW Post and Private Message me with the link; I will look at it and start from NEW.

My first assumption is a BIOS setting error.

 

[Coamex]

Ok, here it is http://www.tomshardware.com/forum/283205-30-memory-running-speed-rampage-extreme

Thank you again.

 

[Dunc-TT]

Just thought I would try to add a comment to give this discussion some closure (from a point of what works to get you up and running). I purchased CMT6GX3M3A2000C8 as it had better timings that the 12GB version and was actually in stock at retailers. It worked fine with the default settings of my mobo (1333Mhz), no CPU overclock. I will play around with the settings to find out what works and certainly would be interested in the best way to approach the CPU+RAM OC for this mobo.

 

[jaquith]

Keep in mind the rated Speed vs running under rated Speed; the CAS ALL change. You will need to contact Corsair via a ticket to determine 'those' timings; as speed decreases so does the CAS:

Example {not correct, but for illustration} CMT6GX3M3A2000C8:
2000 MHz 8-9-8-24
1600 MHz 7-7-7-20 **

http://forum.corsair.com/forums/showthread.php?t=87341

A few times a year I do build a rig with 2000 MHz RAM, but when I do I start with the RAM running at 'stock' speeds. Next I determine the OC, I use Koolance, which is typically 4.2~4.6 GHz. Finally, I OC the RAM to ~2000 MHz and adjust the voltage. In my experience I could never get 2000 MHz to post or run at rated until the CPU was OC first. Finally, I would 'tweak' all voltages and BCLK/CPU/etc Multipliers to yield a final stable system. It is NOT a 5 minute affair of throwing-in Googled OC numbers and EVERY setup is entirely different. Meaning (2) identical rigs will need different settings. People who successfully OC are experienced and have a 'feel' that is impossible to state in a post.

** http://forum.corsair.com/v3/showthread.php?p=472729

 

[Guest]

Kind of late reply, but I have something to chip in... I have exact same setup, and went through few chips before I learned what was going on. I have initially purchased Patriot's Viper II 1600Mhz 12GB kit, and could not get it to work at that speed. I've tried so many thing, but with no luck. Then, I found that post on Patriot forum stating lowest bios version works just fine with this memory. So, I downgraded (about 4 builds down to 402), adjusted settings, and it worked right away. None of other bios releases worked. It seems Asus decided to give non-QVL chips no go. I was to order Dominator 2000 kit, but it is not listed on QVL, however, Corsair lists it as compatible. I guess in this case we are free to go to their support, and demand help in setting things up... Anyways, those chips are hard to get, so I settled with Kingston HyperX, which in fact is listed on QVL at 2000Mhz on all 6 dimms... I should have them tomorrow, and will post back with results.

 

[degetzelus]

Hi Jaquith,

Thanks for your prompt advice.

I feel going for 3x4GB is the best idea as I still have more room for expansion as long as the timings remain good. 1600Mhz seems a bit slow these days and 2200Mhz has very few options out there, so two configurations caught my interest:

CMT12GX3M3A2000C9 - DDR3-2000 (DominatorGT-16000 9-10-9-27*XMP*3CH)
and
CMX12GX3M3A2000C9 - DDR3-2000 (XMS3-16000C9) Latency 9-9-9-24

I find it strange that the 2nd item has better latency ratings than the Dominator GT, but the description is different and it does not mention XMP or 3CH which I presume is triple channel. Which would in theory be faster?

Also, where did you get that graph from and can I compare the two above?

Cheers.

IF YOU CAN AFFORD GET ADATA Plus V2.0 Series 2200MHz 8-8-8-21 PC3 17600 , BUT IS VERY PRICEY... 😱 AND SO FAR IS DUAL CHANNEL RETAIL PKG 2X2GB SO FOR TRIPLE CHANNEL YOU WILL HAVE TO BUY 3X(2X2GB) PKGS FOR ONLY 12GB TOTAL THEY HAVE IT ON AMAZON PART # AX3U2200PB2G8DP2 GOOD LUCK 😀

 

[Ultimatep]

Hello,

is the ASUS Rampage III Extreme working also with 24GB of memory CMT12GX3M3A2000C9 (2 times the set of 3 modules)? Any catch or something to pay attention to?

Thanks and regards
P

 

[chiefhubbard]

This is my first build since my Pentium 4, but will be with the Cool Master HAF X, Case, Asus Rampage III Extreme Black Edition, Intel i7 990X extreme and 24GB of Corsair Dominator-GT CMT12GXM3A2000C9 (says Intel i7processor Extreme Edition compatible). It will include a couple of EVGA NVIDA GeForce GTX 580 Call of Duty Black Ops Special Edition with Fansink included. Will not bother with the rest since this thread is on the Motherboards & Memory. Asus say's the RAM is not on their list but that does not mean that it was or was not tested. Corsair say's that the RAM will work, guess I will find out when I am done and will post. It is far easier for the maker of the RAM to do the testing than the maker of the MB since they want you to buy their RAM. I will hold their feet to the fire when I am done.

 

[vanjamarin]

Hello,

is the ASUS Rampage III Extreme working also with 24GB of memory CMT12GX3M3A2000C9 (2 times the set of 3 modules)? Any catch or something to pay attention to?

Thanks and regards
P

Hello,

is the ASUS Rampage III Extreme working also with 24GB of memory CMT12GX3M3A2000C9 (2 times the set of 3 modules)? Any catch or something to pay attention to?

Thanks and regards
P

Yea it does - Ive just installed it yesterday and spent all night trying to see what it can be tweaked into....

So with Rampage III extreme and intel i7 960 i ended up with following:

Definitely the most stable situation is when I get to O.C. RAM via O.C.ing cpu...

Have latest Rampage BIOS. BUT OLDER ONES ARE THE SAME IN THAT PART....

So, in TWEAKING AREA i tried all possible values, multipliers, voltages etc... And ended up with following...
I O.C. CPU with its 'automatic' - 3 step option... Went from 3.2 Ghz to 3.6 (it's middle value). - fsb multiplier is x24...
That step alone upgraded my 24 GB of RAM to 1594 Mhz (i was going for 1600) with automatic rise of qPi/DRAM voltage to 1.4xx mV and dram to 1,6xx mV

I run battery of benchmarks and tests - and did some manual measuring ( I use it for video editing) - it was stable as can be (still is) - now I am getting ready to try to get even higher - to real OC world!!!!

Good luck!
V.