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Microsoft Windows 7 (64-bit)

I'm plan to update my current ddr3 2gb 1333Mhz 1.5v cl9 ram with two ddr3 4gb 1600Mhz 1.35v cl11 ram cards for get total 8gb ram. its possible to do that kind of ram upgrade? 

1 REPLY 1
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Hello
if it is not taken care of it is better to avoid
Help yourself with this document

 Compaq 320, 321, 420, 421, 620 and 621 Notebook PC and HP 420 and 620 Notebook PC

possibly try scan:

Welcome to Crucial USA

 

except error the max indicated by hp is 4 go

if you don't have a 64 bit system, it's useless anyway

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