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1.5v vs 1.35v laptop memory


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#1 +ultimate99

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Posted 01 April 2014 - 11:36

My laptop came with a 4gb 1.35v ram and I want to upgrade to 2x8gb ram. However, I find that 1.5v tend to be cheaper than 1.35v. Why is that? Any real world difference in performance? 




#2 Luc2k

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Posted 01 April 2014 - 12:44

They laptop will last longer on battery most likely and the memory should release less heat, but I'm not sure of the actual stats.



#3 +snaphat (Myles Landwehr)

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Posted 02 April 2014 - 06:11

There's not going to be a performance difference. Spec's are specs in that regard. You need to make sure your laptop is compatible with whatever voltage you get though.



#4 OP +ultimate99

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Posted 02 April 2014 - 10:49

There's not going to be a performance difference. Spec's are specs in that regard. You need to make sure your laptop is compatible with whatever voltage you get though.

Well, i think both, as I have 2 in, one 1.5v and the other 1.35v.

 

So I guess I could go with the cheapest 1.5v.



#5 Luc2k

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Posted 02 April 2014 - 13:29

Well, i think both, as I have 2 in, one 1.5v and the other 1.35v.

 

So I guess I could go with the cheapest 1.5v.

That probably means they're both running at 1.5v.



#6 Jason S.

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Posted 02 April 2014 - 13:33

That probably means they're both running at 1.5v.

i agree - theyre probably both running at 1.5v.

 

i'd just go w/ the cheaper stuff if youre upgrading. ive never seen benchmarks, but i'd be very curious about what impact on battery life the 2 specs would have.



#7 +snaphat (Myles Landwehr)

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Posted 02 April 2014 - 14:54

i agree - theyre probably both running at 1.5v.

 

i'd just go w/ the cheaper stuff if youre upgrading. ive never seen benchmarks, but i'd be very curious about what impact on battery life the 2 specs would have.

It's going to be 1-2W difference @ load and <1W @ non-load per dimm. So how much of a difference it makes would depend on the laptop. For example, mine has a 16W TDP and uses 11-13W typically. So you could get a difference in power consumption of ~7-30% (because even a single Watt is considerable difference).                

 

see: http://www.servetheh...y-intel-avoton/



#8 OP +ultimate99

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Posted 03 April 2014 - 13:08

The bigger the latency the better?

  • Cas Latency: 9
  • Timing: 9-9-9-28
  • $176
  •  

vs

 

  • Cas Latency: 11
  • Timing: 11-11-11-28
  • $180


#9 Jason S.

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Posted 03 April 2014 - 14:50

 

The bigger the latency the better?

  • Cas Latency: 9
  • Timing: 9-9-9-28
  • $176
  •  

vs

 

  • Cas Latency: 11
  • Timing: 11-11-11-28
  • $180

 

no, latency means 'delay'. you want lower latency (less delay)

 

http://en.wikipedia....iki/Cas_latency