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As I understand you would like to know if you can upgrade the memory on your PC.
Don't worry as I'll be glad to help with your HP ENVY Desktop - 750-055xt CTO.
As per the mother specification, it has dual channel memory architecture with four 240-pin DDR3 DIMM sock.
Yes, you can upgrade the memory on your PC.
Below is the memory upgrade information.
You must select the following combination:
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