Mixing Same Speed/Voltage. Different CAS Ram

Gabriel Wong · May 1, 2015

Hi,
I currently run 2x4GB G.Skill Ripjaws X Series with Specs:
DDR3 1866 (PC3 14900)
Timing 9-10-9-28
Cas Latency 9
Voltage 1.5V
I want to mix with Crucial Ballistix Sports XT 8 GB with Specs:
DDR3 1866 (PC3 14900)
Cas Latency 10
Voltage 1.5V
I just want to know if it would ruin the ram sticks if I mix. Im okay with it being slightly slower since all I need is the 16GB to run a small Minecraft server.

GhislainG · May 1, 2015

Give it a try. Worst is you'll have to set them at CAS 10 and 1600 MHz.

Gabriel Wong · May 1, 2015

I could get it to boot up with the 8gb and 4 Gb stick on channels 1 and 3. Works fine with 12 GB but cant get it to boot with both 4 GB's. I am using automatic ram settings from my bios. If it cant work I'll settle for 12 GB. How can I check if its stable?

Tradesman1 · May 1, 2015

What mobo and CPU

Gabriel Wong · May 2, 2015

I have MSI Z87-G45 Gaming mother board, Intel-I7 4770k CPU.

Gabriel Wong · May 2, 2015

I got it to boot with 16 GB. I had to put the two 4 GBs in the Dual channels 1 and 3 with the 8 GB at Channel 2. How should I adjust the latency using Bios? 2x4GB G.Skill Ripjaws X Series with Specs:
DDR3 1866 (PC3 14900)
Timing 9-10-9-28
Cas Latency 9
Voltage 1.5V
Crucial Ballistix Sports XT 8 GB with Specs:
DDR3 1866 (PC3 14900)
Cas Latency 10
Voltage 1.5V

GhislainG · May 2, 2015

You didn't mention in your original post the 8 GB was a single module. Why didn't you buy a 16 GB kit and sell the 2 x 4 GB kit?

What are the specs of the 8 GB module at 1600 MHz (you can use CPU-Z to check it)? Set the memory configuration to manual mode (or whatever its caled in the BIOS) and use the highest timings as per CPU-Z; another solution if not stable is to increase voltage a bit, but don't exceed 1.6 V. Run Memtest86+ and Windows memory diagnostics for several hours to make sure there are no memory errors.

Gabriel Wong · May 3, 2015

I ran the Windows Diagnostic Test and it came up with no error results but havent had the time to run the Memtest86.
I have my CPU-Z report in this link not sure if my RAM settings are the best despite no errors.
https://drive.google.com/file/d/0B1gxOYv7KWpJazlSamowY0RMd2c/view?usp=sharing

GhislainG · May 3, 2015

You are running the modules at 10-10-10-31 @ 939 MHz (939 * 2 = 1878 MHz). One set of modules is slightly overclocked; if Memtest86+ finds errors or you experience system stability issues, then lower the speed to 1600 MHz.

gskill support · May 4, 2015

All the modules are slightly overclocked, but sounds like it is perfectly fine with timings at CL10.

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