Two identical RAM kits usually play nice.

Yes, but it’s not guaranteed. You’re essentially running four sticks instead of two, which puts more stress on the memory controller.

If both kits are the exact same model, same speed, same timings, and ideally the same revision number (check the label), you have a good chance. But “identical” on the box doesn’t always mean identical inside — manufacturers change chips without changing the SKU.

The real risk: instability at rated speeds, especially with DDR5 or high-frequency DDR4. You might have to drop the speed or loosen timings to get it stable. A single 64GB kit (two sticks) is always safer because it’s tested as a pair.

If you already own the second kit, try it. Worst case you drop into BIOS and lower the frequency a notch. If you’re buying new, just get a single 2x32GB kit and save yourself the headache.