Your machine can be upgraded. Your motherboard supports 2 DDR 3 SO-DIMMs (204 pins). Each slot supports 2 GB DDR3 DIMM. Dual-channel memory architecture supports the speed of PC3-8500 @ 1066 MHz. Only non-ECC memory is available, and the maximum support without cache is 4 GB* *. The actual available memory may be less than this value. If the above information can't solve your problem, you can continue to ask questions, or visit HP's technical support webpage (www.hp.com.cn/support) and HP's home product support forum (www.hp.com.cn/hpcommunity) for help. Thank you for your support to HP.
I hope the above reply can help you.