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2xCorsair Dominator GT 16gb and Asus rampage iv extreme

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September 4, 2012 4:15:11 PM

Hi. I made new PC and among it were 2 kits of Corsair Dominator GT 16(4x4) with 2133 frequency and Asus rampage iv extreme mobo. So far I had no problems with other parts, but with memory there was bit of trouble.
First it only detected 24gb but swapping slots helped and now it sees all 32gb.
Then it automatically set frequency to 1333 which I didn't like and set it manually to 2133. That was stupid decision as it seems. Random reboots and BSODs and failures to install Win 7. Then I went and set frequency to 1866 and problems mentioned above disappeared. I can run it 1866, but really, then there was no point in buying 2133 RAM. So if anyone knows how to make it run at 2133 stable and with no problems, I would be grateful for advice.
Tried to set profile to XMP and it still didn't work as it's supposed to.
a b } Memory
September 4, 2012 4:58:23 PM

What are the memory voltages that you set in the bios? With a quick search on Google I find the sets can range from 1.5v to 1.65v depending on which ones you have.
September 4, 2012 5:01:56 PM

they're set automatically and when i set 2133 bios showed voltage of 1.63-1.66. Think I should set voltage manually?
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a b } Memory
September 4, 2012 5:07:16 PM

_Flyer_ said:
they're set automatically and when i set 2133 bios showed voltage of 1.63-1.66. Think I should set voltage manually?


Well without knowing the exact kit you have I can't say. I would need to know the part number to look it up or you can go to Corsair's website and do that.
a b } Memory
September 4, 2012 5:37:54 PM



Well it states 1.5v at those speeds but if you are getting BSOD's I would test with Memtest86 and see if you get errors there. If you do then I would bump it up to 1.55 and test again. Keep trying at .05 volt increases to 1.6 and then if you still get them you might have a bad chip or 2.
a c 347 } Memory
a c 207 Ĉ ASUS
September 4, 2012 5:58:09 PM

Keep in mind the Rated Frequency & CAS Timings are for (1) one kit and not (2) two kits.

Questions:
1. Are you OC'ing the CPU? ; If yes then post ALL of your BIOS settings
2. What settings, other than AI Overclock Tuner -> XMP, have you tried for DDR3-2133?
3. When you load XMP what is the last Voltage listed in the BIOS under 'AI Overclock Tuner'?

The settings are different for Stock CPU and OC CPU.
September 4, 2012 6:24:38 PM

jaquith
1. Nop, haven't changed anything
2. All default
3. . Always 1.662-669, on 2133, on 1866 on xmp
a c 347 } Memory
a c 207 Ĉ ASUS
September 4, 2012 8:27:32 PM

Regading (#3), the last listed voltage in the BIOS in XMP is the VCCSA and you'd kill your system if it were "1.662-669".

The CMT16GX3M4X2133C9 is a 1.50/1.2v kit as I recall and with AI Overclock Tuner the XMP should read 'XMP DDR3-2133 9-11-10-27-2N-1.50V-1.20V' but I need to know.

This is wrong and way over-volting:
Quote:
they're set automatically and when i set 2133 bios showed voltage of 1.63-1.66


Try BIOS:

XMP Only:
F5 ; Load Optimized Defaults
AI Overclock Tuner -> XMP ; use Profile 1
F10 ; Save & Exit = Yes

Failure:

XMP + Voltage override:
F5 ; Load Optimized Defaults
AI Overclock Tuner -> XMP ; use Profile 1
VTT CPU Voltage -> Manual
VTT CPU Voltage -> 1.20v
CPU VCCSA Voltage -> Manual
CPU VCCSA Voltage -> 1.20v
DRAM Voltage AB -> 1.55v
DRAM Voltage CD -> 1.55v
F10 ; Save & Exit = Yes

Failure:

Full Manual with slower CAS:
F5 ; Load Optimized Defaults
AI Overclock Tuner -> Manual
VTT CPU Voltage -> Manual
VTT CPU Voltage -> 1.20v
CPU VCCSA Voltage -> Manual
CPU VCCSA Voltage -> 1.20v
DRAM Voltage AB -> 1.55v
DRAM Voltage CD -> 1.55v

Memory Frequency -> DDR3-2133
DRAM Timing Control /Enter
DRAM CAS -> 10
DRAM RAS to CAS -> 10
DRAM RAS PRE -> 10
DRAM RAS ACT -> 30
DRAM Command Mode -> 2
F10 ; Save & Exit = Yes

Let me know. If it posts then either we can adjust CAS Timings if needed or once satisfied and completed then run Memtest86+ overnight. Create a bootable CD/DVD/USB, F8 boot to Memtest and let her run; Memtest (ISO) - http://www.memtest.org/#downiso
a b } Memory
September 4, 2012 8:38:42 PM

Specs for his memory are:


Warranty Lifetime
Size 16GB Kit (4 x 4GB)
Performance Profile XMP
Fan Included No
Heat Spreader DHX+
Memory Configuration Quad Channel
Memory Type DDR3
Package - Memory Pin 240
Package - Memory Format DIMM
Tested Voltage 1.5
SPD Voltage 1.5
Speed Rating PC3-17066 (2133MHz)
SPD Speed 1333MHz
Tested Speed 2133Mhz
Tested Latency 9-11-10-27
SPD Latency 9-9-9-24
September 4, 2012 8:40:08 PM

I didn't override voltage anywhere, all voltage is set to the defaults.
And I can distinguish VCCSA from DRAM AB and DRAM CD.
Anyways, I set again to XMP and Frequency to 2133 and so far no reboots and no BSODs. For now I guess it's solved, though I will write if I encounter troubles again.
jaquith and ahnilated, thanks for your help
!