Does a laptop with DDR3L RAM @ 1600 Mhz run slower than with DDR4 RAM @ 2133 Mhz?

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vijay_001

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Sep 21, 2011
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Same skylake CPU
Same amount of RAM
Same configuration of HDD
but one has DDR3L @ 1600 Mhz & the other one has DDR4 @ 2133 Mhz.

Will the DDR3L laptop run slower than the laptop with DDR4 RAM?
 
Solution
ledhead11
Think of latency and frequency like the delay for a response but how fast the response is given. You can have a slow response time, but then give the answer more quickly.
I.E. 1600mhz low latency means fast response time but slightly slower answer compared to 2133mhz
or 2133mhz higher latency but when the answer starts its quicker, but in DDR4's case uses less power(but only slightly).

These numbers are likely so close as to be indistinguishable but the real question is whether or not the DDR4 laptop will be up-gradable to even faster speeds down the road. If it is, then that is the road to go, if not then whatever is cheapest. The mobo/cpu/bios(XMP) specs are the deciding factor for that option.
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ledhead11

ledhead11

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Although ddr4 often will run at higher frequencies, ddr3 lower frequencies can have lower latency. DDR4 also usually uses less voltage which is why so many have already jumped on board with it, especially laptops.
 
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ledhead11

ledhead11

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Oct 10, 2014
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Think of latency and frequency like the delay for a response but how fast the response is given. You can have a slow response time, but then give the answer more quickly.
I.E. 1600mhz low latency means fast response time but slightly slower answer compared to 2133mhz
or 2133mhz higher latency but when the answer starts its quicker, but in DDR4's case uses less power(but only slightly).

These numbers are likely so close as to be indistinguishable but the real question is whether or not the DDR4 laptop will be up-gradable to even faster speeds down the road. If it is, then that is the road to go, if not then whatever is cheapest. The mobo/cpu/bios(XMP) specs are the deciding factor for that option.
 
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Solution
ledhead11

ledhead11

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Oct 10, 2014
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If this is for gaming as just about anyone worried about speed is . . . .obsess on a GPU with 8gb or more DDR5 or DDR5x or HBM2(not truly out yet). System memory helps but once you hit 1600-1866 or higher its all about the same at this point. GPU Vram is far more important. There are 1080p games at ultra that will eat 4+GB Vram out now. 4k will avg 6-8gb Vram and probably more in the next 2 years.

If this is for editing or computational the speeds will matter but size is equally important. Video/photo editing can eat ram real quick when working with hi-res images. I've seen 10-15mp images chew 16+gb during editing.

DDR3 configurations may limit 16, 32gb, somtimes 64gb
DDR4 configurations usually are ready for 64gb.

Before really making a choice or judgement you really need to confirm the CPU/MOBO/BIOS specs. The same CPU doesn't matter if the BIOS or MOBO somehow limit things.
 
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