According to your description, I suggest you refer to the following information:
1.compaq326 notebook has two memory slots, which support DDR3 1333MHz memory, and the maximum memory supported is 4g (2gx2). You can keep the pre-installed memory and increase the memory by 2G; Or take out the pre-installed memory and put it back into 2G or 4G memory;
2. Tips: If 4G or more memory is installed in a 32-bit operating system, all memory will not be fully utilized due to the limitation of the system's own memory mapping access. If you want to fully recognize 4GB or more of memory, it is recommended that you install and use a 64-bit operating system.
3. If you confirm that the original spare parts of the machine can't meet the existing work requirements and want to upgrade the spare parts-in order to ensure the compatible use of hardware, it is recommended that you try to contact HP Gold Service Center for consultation and add original spare parts.
You can check the contact information of HP Gold Service Center through the following official link:
/zh/support-drivers/e support/as CPPS . html
4. If you want to upgrade the spare parts yourself, it is recommended that you bring the spare parts for the field test of the machine, which can be used normally before purchase, so as to prevent the machine from working normally due to incompatible hardware.
Warm reminder: Because the notebook belongs to high-tech electronic equipment, it is easy to cause hardware failure if it is disassembled without professional training. Problems caused by self-disassembly may affect the warranty of the machine. Please consider it carefully. If you have to disassemble by yourself, please discharge your own static electricity and the static electricity of the equipment before operation. However, it is difficult to disassemble the notebook. If you encounter any problems during disassembly, please stop the operation immediately and contact the Gold Medal Service Center to test the hardware.
I hope the above reply can help you.
If the above information can't solve your problem, you can log on to www.hp.com.cn/chat,, the online chat room of HP Network, and ask an online engineer to help you solve the problem further.
More product information is available in www.hp.com.cn/800..