ram upgrade for laptop

[94puneeth]

I have a HP pavilion 15- au102tx notebook having a 4 gb 2133 mhz ram. I wanted to upgrade the ram to 8 gb ram and thought of clubbing both together, later found out that clubbing 2133mhz and 2400 mhz would cause problems, not knowing I bought 8gb 2400 mhz ram. I usually use the laptop for games so I would like to know
1. if clubbing both together would cause problems?
2. instead should i get 8 gb 2133mhz ram
3.clubbing 4gb 2133 mhz and 8gb 2133 mhz would be better or only one 8gb 2400 mhz replacing the old 4gb would be better

 

[The Paladin]

1. At best, mixing speeds only means that pc will use the slower of both speeds thus 2133
At worst, missing ram speeds/sticks will have the pc give you all sorts of issues, including refusal to boot, blue screen of death etc.

2. according to HP web site forums this questioin was asked on https://h30434.www3.hp.com/t5/Notebook-Hardware-and-Upgrade-Questions/RAM-Upgrade-for-Pavilion-15-AU102TX/td-p/5985642 and the answer was

Manual: Page 1, 35-37 , http://h10032.www1.hp.com/ctg/Manual/c05273198 you system can handle up to 16GB (two 8gb sticks of exact same configuration, speed, voltage as given in Manual and each other in two slots)

so 2x4GB or 2x8GB 2133Mhz is what you need, you can likely use 2x 2400 Mhz but they will run at 2133 if they run at all.

 

[kerberos_20]

also make sure that your laptop can handle non HP rams, some bioses have white listed only few kits, can be fixed in linux if that would be that case

 

[das_stig]

In theory, the 24000mhz should drop down to 2133mhz, but may cause instability.
Using single channel ram, may loose a few pecentage points in performance of dual channel, but the extra speed can offset a little.

My preference, is either return the ram and get 2x4G 2400mhz, or if motherboard supports it, getting a matching 8Gb 2400mhz stick.