1 vs 2 modules on mobile i5 sandy bridge win7 ultimate

[krumme]

Wondering if i should use an extra module of 2 gigs, so total is 4 gigs

What is the performance advantages of 2 modules vs 1?
What is the power disadvantages?

Do you know of low power ddr3 1333 sodimm?

Battery power is very important for me
I only do light officework and surfing with few tabs

Computer Dell e6420

 

[Blain]

Wondering if i should use an extra module of 2 gigs, so total is 4 gigs
What is the performance advantages of 2 modules vs 1?
What is the power disadvantages?

Do you know of low power ddr3 1333 sodimm?

Battery power is very important for me
I only do light officework and surfing with few tabs

Computer Dell e6420

Your usage is not demanding...
Stick with 2GB and turn down the eye candy in the OS.

 

[Drsignguy]

Agreed. Since you used the phrase "light officework" 2Gig is fine. It is when the term "heavy(er), you may want to bump it up to 4.

 

[VirtualLarry]

Extra RAM would mean hitting the HD less, so it could save power in the end.

What about replacing the single 2GB DIMM with a 4GB DIMM, rather than adding another 2GB?

 

[Auric]

Low power are available:
https://duckduckgo.com/?q=1.35V+DDR3+SODIMM

Check for compatibility (Qualified Vendors List) with Dell, Crucial,... Also, how the timings and lower voltage will be handled -automatically or by manual BIOS setting and so on.

2GB should be sufficient and presumably a single module will draw the least power and not noticeably affect performance versus dual-channel.