[SOLVED] can i combine these different size ram sticks?

[DrTesla]

Right now i have installed the VENGEANCE® Pro Series — 16GB (2 x 8GB) DDR3 DRAM 1600MHz C9 ( https://www.corsair.com/uk/en/Categ...AM-1600MHz-C9-Memory-Kit/p/CMY16GX3M2A1600C9B )
My brother upgraded his, and gave me the XMS3 — 8GB (2x4GB) DDR3 1600MHz C9 ( https://www.corsair.com/eu/en/Categ...DDR3-1600MHz-C9-Memory-Kit/p/CMX8GX3M2A1600C9 )
I was thinking if i could add them to my current to reach 24GB of ram, so i put them in, but my pc didn't start at all, instead it made 4 short beeps. How can i solve this, if it;s possible at, that is.

my specs are these.

 

[Third-Eye]

You can combine them and they might work, but they might not. You won't know until you try. Make sure to place the 2x8GB kit in A2 B2 slots first. |CPU Socket| |A1|A2|B1|B2|

Edit I was reading in a bit of a hurry and missed that you already tried them. Make sure you install them how I said above and also don't try using XMP. You will very likely need to manually set the timings. If CL9 does not work, try 10-10-10-30 timings.

 

[Calvin7]

That kind of combination has no guarantee to work together.