Hello, Master Yang, mine is Dell XPS M 1530, a notebook with a graphics card door. A few days ago, I changed an improved graphics card core, and only half of the memory is left.

I think it's a hardware problem. I suggest you contact the after-sales department to serve you.

You can call Dell's after-sales service telephone consultation: call 800-858-2969 from the fixed line; Call 400-886-86 10 from your mobile phone.

Provide you with the Dell repair station inquiry website: www.dell.com.cn/cis.