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God damned Corsair Vengeance 8GB 1866 Mhz OC

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January 18, 2013 12:32:22 PM

OK so here's the deal in the last couple of weeks i've been searching for a stable OC for the CMZ8GX3M2A1866C9 and literally found NOTHING.I mean, i've found a ton of oc's for the 1600 and 1333 mhz series but for the 1866 the sector is empty.Are the modules non-ocable?If they are safe to oc then could someone tell me what are the voltages and the timings they used?

P.S:My mobo is GA-970A-D3 and the timings right now are 9-9-9-27 (prefabricated timings)
a b } Memory
January 18, 2013 1:18:06 PM

Increase the timings and frequency. If that works keep it that way. Otherwise increase the voltage step by step. Like from 1.5-1.525, 1.525-1.55
January 18, 2013 1:21:48 PM

try 9 10 9 27 1T 1.575... BTW i have a set of corsair vengance 1866, and while i can get them to 2000, not much point because 2000 is slower than 1866 In the STREAM benchmark.

and 999 27 is so fast... (i tried it and the memory is flaky at that speed)
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January 19, 2013 2:37:21 PM

well i tried but wtf i saw in my bios that it has some sort of auto mode where the timings were 13/13/13/31 i think. Near those it was the SPD section that shows the 9/9/9/24 timings. I can only change the auto column so i changed them to 9/9/9/24 and downgraded to 1600 mhz (they are stable ).Should i try at 1866 mhz? would it be stable?

Oh, and i didn't change the voltage settings i put them on auto.
a b } Memory
January 19, 2013 3:03:34 PM

1866MHz at 13-13-13-31 is worse than 1600MHz 9-9-9-24.
Set the timings to 10-10-10-27 and set the frequency to 1866MHz
January 19, 2013 5:01:28 PM

Well i just did it but i don't know.. it feels like it's a bit slower than the previous version.. or it's just me
a b } Memory
January 19, 2013 10:21:18 PM

Yes that is bound to happen because as you are increasing the frequency you are increasing the timings too. I don't really think that it would become slower. If you experience any decrease in speed it is probably due to improper ram settings.

You need to increase the voltage a litle for actually experiencing any speed boost.

Increasing voltage increases temperature of the cards causing them to crash.
January 20, 2013 7:16:51 AM

well first i bumped the voltage up at 1.525 didn't see much of a difference then i changed the voltage again at 1.550 and it started to be quicker :D 
a b } Memory
January 20, 2013 12:26:22 PM

In you go further than 1.55 V just make sure that the cards are not getting too hot.
January 20, 2013 1:48:48 PM

Yeah I increased the voltage to 1.575 and the timings are now 9-10-9-27 and it's stable. I checked with Prime95 and the pc has ran for like 10 hours till now
a b } Memory
January 20, 2013 11:23:07 PM

I think 1866MHz with 9-9-10-27 at 1.575 is a little high, and you have all the ram slots used up then the heat at that region will get very high.
Just make sure that you have a steady air flow.
January 21, 2013 10:45:27 AM

Yeah i do have air flow but they are 2X4 sticks.
a b } Memory
January 21, 2013 11:42:13 AM

Are all the slots in your other board full how many cards do you have?
Didn't quite understand your previous post.
May 28, 2013 9:23:50 AM

well i hope everyone here knows that the lower memory timings are better and not higher. the lower the number the lower the delay between sending data

also if you have 1866 its made to run 9 10 9 27 at 1886, it will run lower timings in slower modes. at 1333 modes my mobo says it will run 5 or 6 at the stock voltage
October 4, 2013 10:32:20 AM

At 1866MHz, you should be able to get 9-9-9-24 pretty easily, but like was said earlier, you'll have to play with the voltage a little bit here and there, as well as tinker on some timings etc. Its highly possible you could get an 8 in there somewhere as well.

The MAIN point here, is that your RAM was selected and tested from the factory to be STABLE at 1866MHz, with 9-10-9-27 timings. If the sticks you have are not capable of that when you utilize the XMP settings, then you are entitled to a return, as they fail to achieve their advertised abilities. Lastly, all those other overclocking guides are applicable in their methodology of overclocking, the step by step "walking" of timings and voltages a little painstaking, but is a MUCH safer way than just plugging in settings for what worked on someone else's chips. Theres may be better (or even worse) than what you have and its important to carefully test your chips boundaries.

Take your time, be patient, be methodical. Attention to details pays off.
October 17, 2013 8:22:41 AM

I have Corsair Vengeance v3.24 1.5v 1866mhz in my Sabertooth Z87 using:

XMP for frequency 1866MHZ: Single Channel - NB Frequency: 3988.7 ~ 3900.1Mhz (max) - DRAM Frequency: 933.4Mhz - FSB:D RAM=1:7 - CL:10.0 - tRCD:11 - tRP:10 - tRAS:30 - tRFC:243 - CR:2T

I Did one OC by Intel Extreme Tunning Utility: 44x44x44x44 by 133minutes and its ok (cache 39x) all setup default and Adaptive voltages for Cores and Cache in my i7 4770K, Hydro Cooler H100i, Gigabyte nVIDIA GTX 650 Ti Boost 2GB, PSU Corsair TX650M, just 1 module memory hehe

XMP profile:
------ XMP-1866
------ Specification: PC3-14900
------ Voltage level: 1.500 Volts
------ Min Cycle time:1.071 ns (933 MHz)
------ Max CL:10.0
------ Min tRP:10.70 ns
------ Min tRCD:11.77 ns
------ Min tWR:15.00 ns
------ Min tRAS:32.07 ns
------ Min tRC:50.63 ns
------ Min tRFC:260.00 ns
------ Min tRTP:7.50 ns
------ Min tRRD:7.50 ns
------ Command Rate:2T
***
XMP timings table:CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
------ XMP #1:6.0-7-6-18-29-2T @ 560 MHz (1.500 Volts)
------ XMP #2:10.0-12-10-30-48-2T @ 934 MHz (1.500 Volts)
October 19, 2013 8:29:05 AM

Xttony said:
1866MHz at 13-13-13-31 is worse than 1600MHz 9-9-9-24.
Set the timings to 10-10-10-27 and set the frequency to 1866MHz


I'm running these in my rig, on an asrock z77 extreme 4. I set it to 9-9-9-24 2T@ 1866 at only 1.5v. It's the rig I use for gaming, and whatever else. These timings give me a 7.9 on the WEI test and that's fine with me.

These could probably get into the cas8 range at 1866 but u just have to be careful and fiddle with them gently lol
December 14, 2013 8:30:41 AM

I happen to have the exact same RAM and it is running at 2133Mhz right now with the 9-10-9-24 timings.
I have a very good way to test if it is Ok or not.
When I play youtube movies it would give me an error very fast with bad settings of the RAM. Shockwave player crashes.

What I did was to up the power from 1.5 to 1.525v after reading about it here in this post and now it seems to be Ok.

I am with 4670K@4.2Ghz and NB@4000Ghz.

I would like to note that at the default speed of 1866 and the XMP timings I have no problem of any kind with the memory.
December 14, 2013 9:12:53 AM

surr3a1 said:
I happen to have the exact same RAM and it is running at 2133Mhz right now with the 9-10-9-24 timings.
I have a very good way to test if it is Ok or not.
When I play youtube movies it would give me an error very fast with bad settings of the RAM. Shockwave player crashes.

What I did was to up the power from 1.5 to 1.525v after reading about it here in this post and now it seems to be Ok.

I am with 4670K@4.2Ghz and NB@4000Ghz.

I would like to note that at the default speed of 1866 and the XMP timings I have no problem of any kind with the memory.


Hmm i tried the same settings even boosting mine to 1.55v+ and couldnt get it to go over 1866 at all. Must be my overclock
April 30, 2014 3:25:11 AM


    I have mine set at 8-9-9-27 1866 voltage at 1.6v going to try see if I can get lower at 1.7v
a c 1941 } Memory
April 30, 2014 5:53:07 PM

It going to vary from rig to rig, the mobo plays in as does the CPU (and even then from CPU to CPUs of the same exact model), not all CPUs are equal some say 8350 are stronger than other 8350s, and even further some have stronger MCs (memory controller) than others. I've had occasion to build numerous 'identical' systems for businesses, etc and generally if OCed or not, you will often end up with a varied set of voltages and in DRAM can be even in the timings
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