I have a PC with 2x256 ddr in a dual channel setup. I'd like to add more but can't afford to buy more right now. I have another PC with a single stick of 512. Can I mix a 512 and a 256 in the dual ...

If you want to leverage even an integrated GPU for AI you need memory, and Intel is following AMD's lead on Core Ultra and allowing you to choose how much you're using.

On laptops without soldered RAM, upgrading the memory is as simple as swapping out the RAM stick in its slot, an upgrade that can boost your laptop's speed.

Adding additional ranks of DRAM to a DIMM allows for more memory bandwidth, which will be ever-more important as servers clamour over more and more AI workloads.