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Samsung 2x4Gb Low Voltage DDR3 1600 kit (OCing to 2400+) Discussion - Page 136

post #1351 of 2062
Running 4 x 4GB at 2133MHz with timings: 11-11-11-28-2T @ 1.35V

No complaints works very well, but I don't notice any difference compared to 1866MHz with 9-9-9-24-1T @ 1.35v
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post #1352 of 2062
Quote:
Originally Posted by iatacs19 View Post

Running 4 x 4GB at 2133MHz with timings: 11-11-11-28-2T @ 1.35V
No complaints works very well, but I don't notice any difference compared to 1866MHz with 9-9-9-24-1T @ 1.35v

Very nice voltage for 2133mhz! biggrin.gif
Use 1.475v and go for tighter timings tongue.gif (cl9-9-10-26-1T)
post #1353 of 2062
Just tested my kit. Bootable up to 2133MHz. But everything above stock settings is so unstable that windows can`t even start programs or shut down properly (! It does not crash !).
Somehow a bummer - either my IMC on my SB-E is so bad or I might have missed something.
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post #1354 of 2062
Quote:
Originally Posted by Mr.Eiht View Post

Just tested my kit. Bootable up to 2133MHz. But everything above stock settings is so unstable that windows can`t even start programs or shut down properly (! It does not crash !).
Somehow a bummer - either my IMC on my SB-E is so bad or I might have missed something.
?????????????????????????


What kind of BIOS settings are you using?
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post #1355 of 2062
I will have to check, VCCSA settings were push to the max (current capability and what not).
And the VCCSA voltage was at ~1.25V.
This is what I memorized.
I went on, left the RAM alone and pushed my CPU. 5.42GHz.
Sadly going higher resulted in the destruction of the formatting of my 4TB raid, hahahaha. thumb.gif
I will have to take care of that before I torture the RAM again.
But if you have some cool settings, please let me know.
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post #1356 of 2062
First, thank you all for all of the valuable information that can be found searching through this thread.

I just switched out the 2x4GB of Corsair RAM in my rig for 4x4 of the low-profile Samsung. My rig consists of an MSI Z68A-GD80 (B3 rev.) and an i7-2600k. I'd like to share my experiences with overclocking it and see if there's something I'm missing.

First, before adding the Samsung RAM, the results I've had overclocking my Sandy Bridge i7 with this board have been somewhat disappointing. I need a full 1.40v for a 4.6Ghz overclock to ensure full prime small FFT and IBT stability, and even this seems to require disabling Intel's power saving features. This particular chip's default vCore seems to be somewhere between 1.20v and 1.21v, based on CPU-Z. I thought this low default vCore would signal an above average overclocker (that tended to be the case with G0 stepping Q6600's back in the day), but that hasn't proven to be the case.

In any event, the IMC also seems weak. Overclocking the Samsung RAM to even 1866 requires making some large boosts to System Agent and CPU I/O voltage. Currently I have the RAM running at 1866 Mhz 9-9-9-24-2T 1.50v (1T at this speed doesn't seem possible for me) with the System Agent at 1.025v and CPU I/O at 1.17v. 2133 seems unobtainable for anything more than POSTing, even when boosting all IMC & vDIMM voltages significantly. The RAM is clearly not the limiting factor, as I've held everything else constant and am finding that I'm still stable while dropping voltage significantly (seems stable at 1.45v still, going to drop more).

Is this just a matter of a poor motherboard or IMC that can't be fixed without changing hardware, or am I missing an essential setting? I'm running MB EFI settings that should allow for maximum performance. I've also followed techpowerup's recommendations for tWCL.

Update: Still seems to be stable (at least in the short run) lowering the SA to 0.965v and CPU I/O to 1.07v, as well as the RAM @ 1.425v. Makes it seem as though there's a wall by which it simply can't pass.
Edited by Zinthar - 11/3/12 at 9:10pm
post #1357 of 2062
Never mind my posts above, user error. There were some more voltages than wanted a small bump.
Now they are running @2140MHz. I will check 2400Mhz now tongue.gif
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post #1358 of 2062
I just put in my order for another 2 4GB sticks.

Dont tell my wife.

Hopefully I can get my 1.48v 2133 9-10-10-27-1t Stable with another 8GB.
post #1359 of 2062
Just got mine in!

16gigs running 2133mhz with 10-10-10-28 1T @ 1.5v right now.

I didn't have time to tweak much but I got a BSOD a little ways into P95 when I tried 9-9-9-24 1T @ 1.5v. Didn't have time to tweak system agent or IO voltage so I just set them back at the above settings. Will play a bit more when I get some free time.
 
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post #1360 of 2062
Quote:
Originally Posted by DJSticky View Post

Just got mine in!

16gigs running 2133mhz with 10-10-10-28 1T @ 1.5v right now.

I didn't have time to tweak much but I got a BSOD a little ways into P95 when I tried 9-9-9-24 1T @ 1.5v. Didn't have time to tweak system agent or IO voltage so I just set them back at the above settings. Will play a bit more when I get some free time.

try 9-10-10-27 1T.

may need a slight bump in voltage.
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