[SOLVED] Mixing two memory kits with (almost) the same timings?

[Sparktown]

I'm thinking about mixing two memory kits on my desktop system. I have an Intel i5 6500 (Skylake) and an Asrock Z170 Pro4S.

Crucial 8GB (2 x 4GB) DDR 2133
CAS Latency 15
15-15-15-36
More info

G.SKILL NT Series 16GB (2 x 8GB) DDR4 2133
CAS Latency 15
15-15-15-35

I've read the various forums posts that say mixing RAM is bad and that you should only use RAM from the same set, bought at the same time, from the same manufacturer, etc. I likely only need 16GB. However, I have four memory slots, so I figured I would at least try to get them to play nice.

I tried to get a new set with matching timings, but I couldn't find anything with 15-15-15-36. I'm a little fuzzy on the details of memory timings, but it seems like my mobo should be able to handle this automatically. I'm assuming my mobo would automatically set the G.SKILL to 15-15-15-36. There doesn't seem like a big hit in performance and probably worth it for an extra 8gb of RAM. The reason I'm upgrading isn't speed, but because I've been running out of memory and Windows 10 makes my page file insanely big (telling Windows 10 to not do that causes my system to run out of memory).

Is this right? Is there anything special I should do? Do I need to adjust any settings manually? Thanks.

 

[Supahos]

Is what you're trying to do really going to benefit from 24 gb ram vs 16?

Usually you can get them to work at the higher of the two speeds. Be sure the matching sticks are in the same colored slots, not beside each other


Might have to bump dram voltage to 1.25 or so to get them to play nice. But by far the easiest option is enjoy your 16 gb and sell use your 8gb somewhere else

 

[Calvin7]

After combining the two kits, you may only be able to run at a slower clock speed, that is 1866MHz. If you don't have that option, it may not boot up.

 

[Sparktown]

After combining the two kits, you may only be able to run at a slower clock speed, that is 1866MHz. If you don't have that option, it may not boot up.

Why would they not both run at 2133 mhz?

 

[Supahos]

It's ddr4 they'll either run at 2133 or won't work together at all. 1866 isn't an option