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Mixing RAM modules with different CAS timings?

J

joanne firus

Member
Hey all.

My rig currently has 4x8GB Mushkin Blackline Frostbyte (1600Mhz, PC3-12800, 9-9-9-24).

I'm looking to max out the RAM by adding another 16GB;
and I've found a set of Corsair XMS3 2x8GB (1600Mhz, PC3-12800, 11-11-11-30) for cheap.

Question is: will it play nice with the RAM that I currently have?
 
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I wouldn't try to mix memory, personally. I never have simply because, best case, your nicer sticks will be stuck running at the speed of the slower ones (At least, that's my understanding).

To address your question: It will probably work as long as your BIOS can find a set of timing that both sets will agree on (most likely 11-11-11-30). If your BIOS can't figure it out, you may be left to enter the timings manually to get them to work and even then you may be SOL. This is also assuming the sticks are rated for the same voltage....

Perhaps someone who's tried this will be able to chime in?
 
Well, the Mushkin sticks are rated at 1.6V whereas the Corsair sticks are at 1.5V...so yea, they have different voltage ratings AND CAS timings.
 
Your mobo would probably have to run the sticks at 1.6v and 11-11-11 at at ddr3 1600 speed.

You could try manually lowering the speed to ddr3 1333 to drop the voltage and latency.
 
joanne firus said:
Well, the Mushkin sticks are rated at 1.6V whereas the Corsair sticks are at 1.5V...so yea, they have different voltage ratings AND CAS timings.
Click to expand...
JEDEC's got us covered 🙂
Even 1.9V DDR3 is going to boot automatically at 1.5V until someone changes it.
 
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