Comparable RAM upgrade for HP Compaq 620 laptop

June 18, 2018 at 15:17:19
Specs: iPhone
Can I upgrade my DDR3 2GB PC3-10600S-9 RAM
to a DDR3 4GB PC3L-12800S low voltage RAM, will this be comparable in my HP Compaq 620.

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#1
June 18, 2018 at 18:34:29
You cannot replace the 2GB stick with a 4GB stick, you will have to add a 2nd 2GB stick of similar specs. Here you go -- https://www.newegg.com/Product/Prod... -- about $15 after 20% off promo code.

BTW, 4GB (2 x 2GB) is that max your laptop will accept.

message edited by riider


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#2
June 18, 2018 at 18:45:55
I can have up to 8GB RAM, either
2 x 2GB = 4GB
or 2GB + 4GB = 6GB
or 4GB + 4GB = 8GB
I have borrowed all of these combinations and the all work.
My question was can I swap a 2GB DDR3
PC3-10600S-9 for a
4GB DDR3 PC3L-12800S

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#3
June 18, 2018 at 19:43:58
According to Crucial & other memory sites, the max is 4GB, but if you say 8GB works, we'll have to take your word for it. If you're running a 32-bit OS, it's pointless to run more than 4GB.

You can run DDR3-1600, in fact, you probably should have been running it all along, unless your laptop has a low end Celeron that runs at 667MHz FSB.

http://www.crucial.com/usa/en/compa...

message edited by riider


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#4
June 18, 2018 at 20:43:45
Thanks for your input. it actually has 64-bit OS. it had just a 2GB Ram when i bought it new over 8 years ago, the Ram in it was a 2GB DDR3 PC3-10-600S-9, but it was very slow. but according to the info on the Laptop, it has 2 RAM slots and like i said, it runs super fast with either 1 or 2 4GB DDR3 PC3-10-600S, AS I only borrowed the 2X4GB RAM. What i want to know, is a DDR3 4GB-PC3L-12800 compatible to use to upgrade my RAM from 2 GB to 4GB.

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#5
June 19, 2018 at 05:42:02
Will it work? Yes, see the link in response #3. Will it improve performance? Going from 2GB to 4GB will definitely improve performance, but going from DDR3-1333 to DDR3-1600 may not make a significant difference. Without knowing which CPU you have, I can only provide basic theory:

667MHz FSB w/1333MHz RAM = optimal pairing for best performance
667MHz FSB w/1600MHz RAM = out of sync, less than optimal performance
800MHz FSB w/1333MHz RAM = out of sync, less than optimal performance
800MHz FSB w/1600MHz RAM = optimal pairing for best performance

However, having more RAM but running it out of sync would be better than less RAM that's running in sync. My advice is to keep the 2GB DDR3-1333 & add a 4GB stick to run 6GB total. 6GB at 1333MHz will outperform 4GB at 1600MHz, regardless of the CPU.


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