Problems with DDR3 2133 on z77

[AsusGuy]

I have an AsRock z77 Extreme 4 motherboard with an i5 3570k. I recently picked up some Mushkin Blackline DDR3 2133 RAM. It is rated for 11-10-11-28 timings at 2133 with 1.5v however the RAM will not POST in the system at those speeds. I have attempted to relax the timings to 11-11-11-30 2T and set the voltage as high as 1.65v but no matter what I do the system will not POST with the RAM at those speeds. It's currently running stable at 2000Mhz 9-10-9-28 1T with 1.55v which I am pretty happy with. However I'm wondering if anyone else has had similar issues with z77 / AsRock motherboards with high speed DDR3. I am thinking I will try 1.66 or 1.67. Anyone else have any thoughts or advise on this issue?

 

[FAUguy]

I have the Mushkin Redline 2133MHz RAM with an ASRock Z68 Fatal1ty Pro Gen3 board, and it works fine at 2133. The voltage is set to Auto (1.65v) and all the timings are auto too, as well the command rate is 2T (1T will not boot).

 

[davidthemaster3]

I have the same mobo (asrock extreme4) and I can't get past post with 2133Mhz RAM either. My RAM is overclocked Samsung Green RAM (4 x 4GB) which is said to overclock really well with some people getting 2400MHz (11-11-11-28 2N) @ 1.50v.

I'm still trying to tighten my timings, but currently my RAM is at 2000Mhz 11-11-11-28 1N @ 1.50v.

My mobo's bios is up to date (1.70 at the time of writing) ...

 

[AsusGuy]

David, I am running BIOS version 1.7 too. My friend has the same motherboard and has had similar problems with RAM at this speed however he got his Team Xtreme RAM to run at 2133 with 1.65v. I am thinking this motherboard has issues with RAM at this speed and maybe a BIOS update will fix it in the future. No amount of voltage or timing configurations seem to make a difference with this RAM beyond 2000Mhz. I have heard really good things about the Samsung Green 1600Mhz RAM. I will try other voltages and timings and let you know what I find.

 

[Don Karnage]

Use XMP. Dont set the timings manually

 

[AsusGuy]

If I don't use XMP or set timings manually the RAM will run at 1333Mhz. However after playing with settings I found I could get the RAM to run at 2200Mhz 10-11-10-28 2T at 1.55 volts at it has been stable. I am assuming the board just does not like to run this RAM at 2133. Maybe the issue will be fixed in future BIOS revisions. For now I am happy getting my ram to run beyond its rated speed.

 

[davidthemaster3]

I don't have XMP profiles with my Samsung Ram so if I don't set the timing manually it stays at 1600Mhz 11-11-11-18 1N @1.55V, so I'm better of setting my timings manualy ...

However, I'm still testing stability but I booted into Windows at 2000Mhz with 9-9-9-24 1N @ 1.5V ... we'll see how that goes.

EDIT: Corrected the timings

 

[AsusGuy]

Wow David that would be great timings for that 1600Mhz Samsung RAM running way over its rated speed. I want to hear how that goes. I'm unable to get my RAM beyond 2200Mhz. But I'm pretty happy with it at those speeds. I can see a big performance increase in SuperPi going up from Ballistix 1600Mhz RAM I had before. We shall see how the increase in RAM speed translates to real world performance.

 

[davidthemaster3]

how did you get to 2200Mhz? I would like to try getting there if my timing fail me

Also, what is your current voltage under load for you 4.5Ghz overclock? What cooler are you usings and what temps are you getting? What settings? I'm very interested in getting 4.5Ghz

I'm at 4.4 GHz and my voltage is around 1.276V I think (I'm at work so I will have to confirm), but when a run LinX my temps jump to 90 degrees C ... I have a Hyper 212+ on my 3570K and since I've seen 20 degree difference on my CPU a idle i'm thinking I might need to re-paste my heatsink ... it was my second time installing a 212+ but I think i messed up

 

[davidthemaster3]

damn, 2000Mhz at 9-9-9-24 1M @ 1.575V was unstable ... I got errors in HCI Memtest ...

I also repasted my heatsink so tmy 20 degree differencee is gone XD (now the difference is never >10) ...

However, I never got my RAM to run any higher that 2000 MHz it just won't work ... guess you were lucky AsusGuy with you mobo and RAM

 

[thelastjuju]

We shall see how the increase in RAM speed translates to real world performance.

Hopefully you aren't expecting much or you'll be getting your hopes up.. big time..

Outside artificial benchmarks, you guys are shooting for real world gains in the MILLISECONDS here.

 

[davidthemaster3]

Hopefully you aren't expecting much or you'll be getting your hopes up.. big time..

Outside artificial benchmarks, you guys are shooting for real world gains in the MILLISECONDS here.

I know, it's for my ego/e-pen ... sorry always wanted to say that, although i do know it won't change a thing in real-world performance I'm just having fun pushing my comp to the max

 

[cmdrdredd]

I don't have an asrock motherboard and I know Asus is known for great memory clocking.

I run the Samsung Green 1.35v memory at 1.475v DDR3-2133 10-10-10-28 CR1. I had them at 2200 11-10-10-28 CR1 @ 1.5v though but I wanted to stay under 1.5v

 

[davidthemaster3]

I don't have an asrock motherboard and I know Asus is known for great memory clocking.

I run the Samsung Green 1.35v memory at 1.475v DDR3-2133 10-10-10-28 CR1. I had them at 2200 11-10-10-28 CR1 @ 1.5v though but I wanted to stay under 1.5v

Any reasons why you want to stay under 1.5V? They Samsung RAM is rated for 1.5V also and the Intel specs sheet say the DRAM controller can take 1.5V ± 5% which gives a max of 1.575V

 

[cmdrdredd]

Any reasons why you want to stay under 1.5V? They Samsung RAM is rated for 1.5V also and the Intel specs sheet say the DRAM controller can take 1.5V ± 5% which gives a max of 1.575V

The spread is 1.35v to 1.5. After 1.5v with these you get very diminishing returns. Sometimes at higher voltage you get worse timings and clock speeds. Lower is always better on voltage for long term. Something I've learned the hard way with DDR2 2.1-2.3v memory that died over and over.

Plus, most motherboards I've ever worked with don't lock to a solid 1.4v if you set 1.4 or 1.5v if you set it to 1.5. There's a variance. For example at 1.475 I'm actually around 1.48v

Currently testing ddr3-2133 9-10-10-24 cr1 @ 1.475v. Passed a couple memtest86+ runs and am currently doing hci memtest. Almost to 100% coverage wi no errors. Gonna let it go to 200 and then ill post a couple benches. Synthetics are the only thing that will allow you to see the difference between 1600 and 2133 though. Mostly i am just tweaking for max frequency with lower timings at lower than 1.5v rather than just max frequency.

 

[davidthemaster3]

I'll be sure to note that when overclocking my RAM ... thanks for the input!

 

[cmdrdredd]

Benchmark at my current setting of DDR3-2133 9-10-10-24 CR1 1.475v. Think I'm gonna leave it here 24/7 as it seems to be a good compromise between speed and timings.

 

[Z15CAM]

Old post I know and forgive my Hi-Jack but I think it maybe possible to get 1600MHz 7-7-7-20 1T@ 1.50v, 1886MHz 8-8-8-24 1T @ 1.55v or 2133MHz 9-9-9-24 1T @ 1.50v or perhaps 2200MHz 10-10-10-28 1T @ 1.5v with this Memory. I know the differences would not show up much in the real world especially gaming but which theoretical timings do you think would post a Higher Bench relative to Video Encoding with a SB i7 processor on water running at say 4.5 or 4.8G's 24/7?

I'm in the process of buying 2 2x4 Dual Channel Kits of this memory (Samsung Green MV-3V4G3D/US) for an Asus P8Z68-V Pro Gen3 / i7 2700k platform.

For AsusGuy, you might try: In Bios changing CAS write latency to 7 instead of 8, up cpu vcore for a determined frequency a notch and VCCIO if running 4 sticks of memory.