Should I go for 2133 or 2400mhz?

[danieltech72]

Hello everyone, I have a weird feeling about this but why is 2400mhz cheaper than 2133mhz on this site I am always buying from?

https://www.pcgarage.ro/memorii/hyperx/fury-black-8gb-ddr4-2400mhz-cl15/

https://www.pcgarage.ro/memorii/hyperx/fury-black-8gb-ddr4-2133mhz-cl14-12v/

is it because one is CL14 and the other CL15? and if so, which one should I get from those 2?
My motherboard says it can support 2400mhz paired with a 7th gen CPU, which I have.
So, the cheaper 2400mhz that consumes more power or the 2133 that costs more and consumes less power?

 

[imsqam]

If you use the equation
(CL/(freq-in-MHZ) * 1000) = timing in ns (lower is better)

Then you get 13.13 for the 2133 and 12.50 for the 2400, so the 2400 is still faster with the higher CL number. And according to this article RAM speed trumps RAM timing even further. So get the 2400, really power consumption considerations are very minor as a single stick of RAM will only consume about 3W of power.

http://www.crucial.com/usa/en/memory-performance-speed-latency

 

[kanewolf]

There won't be enough performance difference to see in any real-world application. There won't be enough power difference to be reliably measured. Get the lower cost option.

 

[Sakkura]

The DDR4-2400 CL15 kit has higher bandwidth, lower latency, and lower cost. It's better in every way.

 

[danieltech72]

If you use the equation
(CL/(freq-in-MHZ) * 1000) = timing in ns (lower is better)

Then you get 13.13 for the 2133 and 12.50 for the 2400, so the 2400 is still faster with the higher CL number. And according to this article RAM speed trumps RAM timing even further. So get the 2400, really power consumption considerations are very minor as a single stick of RAM will only consume about 3W of power.

http://www.crucial.com/usa/en/memory-performance-speed-latency

If I buy another one next month, which I will, 6W isn't really that much anyway, is it?

 

[kanewolf]

If you use the equation
(CL/(freq-in-MHZ) * 1000) = timing in ns (lower is better)

Then you get 13.13 for the 2133 and 12.50 for the 2400, so the 2400 is still faster with the higher CL number. And according to this article RAM speed trumps RAM timing even further. So get the 2400, really power consumption considerations are very minor as a single stick of RAM will only consume about 3W of power.

http://www.crucial.com/usa/en/memory-performance-speed-latency

If I buy another one next month, which I will, 6W isn't really that much anyway, is it?

Buying memory in random batches is not the best option. If you want TWO sticks of RAM you should buy a matched set of two sticks. The manufacturer guarantees them to work together. Anything else is hit-and-miss.

 

[danieltech72]

If you use the equation
(CL/(freq-in-MHZ) * 1000) = timing in ns (lower is better)

Then you get 13.13 for the 2133 and 12.50 for the 2400, so the 2400 is still faster with the higher CL number. And according to this article RAM speed trumps RAM timing even further. So get the 2400, really power consumption considerations are very minor as a single stick of RAM will only consume about 3W of power.

http://www.crucial.com/usa/en/memory-performance-speed-latency

If I buy another one next month, which I will, 6W isn't really that much anyway, is it?

Buying memory in random batches is not the best option. If you want TWO sticks of RAM you should buy a matched set of two sticks. The manufacturer guarantees them to work together. Anything else is hit-and-miss.

I cannot afford 8x2 at this moment, so I thought I could get 8 now and 8 next month, if I want to get x2 I'll have to wait 1 month until I can use a computer

 

[imsqam]

If you use the equation
(CL/(freq-in-MHZ) * 1000) = timing in ns (lower is better)

Then you get 13.13 for the 2133 and 12.50 for the 2400, so the 2400 is still faster with the higher CL number. And according to this article RAM speed trumps RAM timing even further. So get the 2400, really power consumption considerations are very minor as a single stick of RAM will only consume about 3W of power.

http://www.crucial.com/usa/en/memory-performance-speed-latency

If I buy another one next month, which I will, 6W isn't really that much anyway, is it?

Buying memory in random batches is not the best option. If you want TWO sticks of RAM you should buy a matched set of two sticks. The manufacturer guarantees them to work together. Anything else is hit-and-miss.

I cannot afford 8x2 at this moment, so I thought I could get 8 now and 8 next month, if I want to get x2 I'll have to wait 1 month until I can use a computer

You will see a small performance hit until you have the second stick but it will work.

 

[danieltech72]

Can I get 4x2 and then another 4x2 next month? then I'll have 16gb which would somewhat be compatible? I used to have 4x2 separate DDR3 memory's that would work out individually, be the same brand, timing, and all. and they'd work as 8gb but after every 1 month they'd bsod and I would have to switch them around and they'd work again for 1 month, i don't want that to happen to the DDR4 ones, so is getting 4x2 twice more stable? or should I just wait another month until I can get 8x2?

 

[imsqam]

As long as you have 4 RAM slots then you can. Some people like to have fewer sticks as they cooler better with more space between the sticks.

 

[danieltech72]

As long as you have 4 RAM slots then you can. Some people like to have fewer sticks as they cooler better with more space between the sticks.

Will 4x2 of the same brand, freq and timing be more stable than 8x2 of same brand, freq and timing?
I mean I really want to know why they would not work properly since they are from the same site, same manufacturer, same model, either an explanation to that or if it's safe to get 8x2 separate or 4x4 separate but of the same type

 

[imsqam]

There should have no inherent stability differences with 2x4GB vs 2x8GB. Your issue was more likely due to some manufacturing defect as opposed to some design/application deficiency. There might be a difference between 2x8GB vs 4x4GB due to the heat issue but I really don't know.

If it was me I would get one 8GB stick this month and the second same stick next month. For the short term using one stick is not really an issue.