I need a compatible 4GB RAM upgrade for my HP Compaq Presario CQ57 300-tu.

[EzraSparks]

It has a second ram slot and I need one ram chip compatible with the model.

[praveen196]

@EzraSparks Welcome to HP Community!

I understand that you would like to add memory.

I have checked the manual ( page number 3)

2 customer-accessible/upgradable memory module slots  Support dual-channel memory  Supports up to 8192 GB of system RAM  DDR3/1333-MHz

Supports the following configurations:

● 8192-MB total system memory (4096×2; not supported on a 32-bit operating system)

● 4096-MB total system memory (4096×1 or 2048×2; not supported with Windows® 7 Starter OS)

● 3072-MB total system memory (2048×1 + 1024×1; not supported with Windows® 7 Starter OS)

● 2048-MB total system memory (2048×1 or 1024×2)

● 1024-MB total system memory (1024×1; not supported on a 64-bit operating system)

You could purchase the part from HP, use the HP Parts surfer to identify the part: http://partsurfer.hp.com/search.aspx 

And order it via the HP Parts store: https://parts.hp.com/hpparts/CountryChoice.aspx?mscssid=&ccode=ZZ&lcode=ZZ 

Or alternatively, Contact HP for setting up an order/service via phone support

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