2133 mhz kingston hyper x beast DDR3

[Sp0ok06]

Hi people,

1st time poster, have a query that’s boggling me...(I have some PC building experience but I’m no GURU…..)

Current System…..
CASE - ThermalTake CORE V21
MOTHERBOARD - Asus Maximus V Gene M-ATX
CPU - I7-377K @4400Mhz
COOLING - Hi001
RAM - 16Gb(2x8) Kingston Hyper X 2133Mhz
GPU - 1 x Asus STRIX 1080ti OC 11G
PRIMARY - 260Gb OCZ SSD
DATA/STEAM - 2Tb Toshiba HDD
KEYBOARD - Logitech G710+
Mouse - Lazer MAMBA

I have recently replaced 16GB of CORSAIR(4x4) 1600MHz ram with 16GB of KINGSTON(2x8) 2133Mhz. My system became a little unstable. From; very short time delays registering mouse movements and highlighting txt and files in win-explorer, up to game crashes and stuttering during cinebench, but there were no artefacts during any GFX benching with Unigine-Valley or Heaven etc....
I investigated as best I could and came up with only one anomaly, which is as follows. The new ram I installed seems to be from different batches. Both dims have same manufacturers part number, KHX2133C11D3/8GX but that’s where it ends.
One reports as being ‘PC3-12800(800Mhz)’ andn the other ‘PC3-10700(667Mhz)’, I know this is relevant to the FSB/BASE CLOCK which determines the overall ram speed. Also, the CAS and RAS timings are different.
MY MAIN QUESTION I suppose, is this: Will these differences cause problems with stability and am I better off leaving the Corsair vengeance in my system OR is this instability possibly being caused elsewhere in my system…..

HERE IS A PIC OF CPU-Z REPORT
http://imageshack.com/a/img922/4982/lA1KTc.jpg

 

[marko55]

I can definitely see that causing problems....for sure. To stabilize though you may be able to manually tune speed, voltage and timings in the BIOS instead of using XMP. Try setting to 2133, 11/12/11/30 1T (or 2T/N which I've heard can help). If that doesn't work, you may just need to back it down to 1866. I've tried DDR3 2400 (for the hell of it) on some boards that just won't play nice with it. Had to back it down to 2133 to stabilize but worked like a champ.

Here's the thing about all of this.....real world gain between DDR 1600 and 2133 is basically nothing. Its not really worth it....