Question Put in two slightly different RAM sticks, strange settings under which they operate now.

[ReallyAnnoyedMidget]

Hello dear tomshardware community,

I bought myself some new RAM, because I wanted to upgrade to 16GB dual channel RAM.
My problem now is that my new RAM only operates on 1600Mhz when I turn XMP on. But I am not able to turn XMP on when I put my old and new RAM in at the same time, because the old RAM has no XMP option. My old RAM standard Mhz is 1600Mhz. The old RAM has a CAS Latency of 11, my new RAM 11.
When I boot up my PC and check CPU-Z. It shows me this under the memory TAB.

This are my current possible BIOS settings.

1. Is it safe to run my PC at those setttings? My old ram runs at 1600Mhz (now probably 1333Mhz) and at CLS 9 (although it has a CLS of 11).
2. How am I able to change the Mhz of the new RAM to 1600Mhz without turning XMP on (which I can't) and the CLS Latency of it to 11 in the BIOS. Here are my current possible BIOS settings with both RAM sticks inside.

My specifications:
Old RAM: Crucial 8GB DDR3L-1600 UDIMM CT102464BD160B8 DDR3 RAM (

https://imgur.com/a/PWd5N

View: https://imgur.com/a/PWd5N
)
New RAM: Corsair CMZ8GX3M1A1600C9 Vengeance — 8GB (

https://imgur.com/a/W1OUvL6

View: https://imgur.com/a/W1OUvL6
)
Processor under old RAM: Intel Core i5-4570 CPU @ 3.20 GHz (

https://imgur.com/a/YzeFP

View: https://imgur.com/a/YzeFP
)
Mainboard: MSI B84ME-E45 (MS-7817) 2.0 (

https://imgur.com/a/m84wtg4

View: https://imgur.com/a/m84wtg4
)

 

[geofelt]

Ram is sold in kits for a reason.
A motherboard must manage all the ram using the same specs of voltage, cas and speed.
The internal workings are designed for the capacity of the kit.
Ram from the same vendor and part number can be made up of differing manufacturing components over time.
Some motherboards, can be very sensitive to this.

You will need to experiment to see if you can get your two disparate kits to work together.
The XMP settings imbedded in the new ram is a set of settings to make that stick work at advertised speeds.
Your motherboard should have an advanced tab where you can specify all of the ram settings yourself.

I think you should start at default 1333 speed and very low settings.
You may have to increase the voltage above normal to get both sticks to work.

 

[Calvin7]

Memory is guaranteed in the form sold

XMP specifications are for memory in the form sold.

Other combinations you decide to make have no guarantee to work together.

Page 3-17 of English motherboard manual:
DRAM Frequency (default setting is Auto, you can manually change clock speed here)
DRAM Timing Mode (default setting is Auto, you can manually change DRAM timing here)

When combining multiple kits of memory, if PC boots up you may find memory is no longer able to operate at rated specifications. You may get it to work by running memory at a lower clock speed, relaxed DRAM timings, increased DRAM voltage.