Question 32gb 2×16gb ddr4 ram - 2 count (pack of 1) vs 2×16gb kit ?

[thestryker]

Wouldn't cl22 cause me problems / lowered performance ? Everyone on the internet is against 22 and recommends 16 . I need to choose between cl16 2133mhz and 2933mhz cl22 ?

JEDEC timings recently have all been done keeping relative parity across the board for absolute latency. Absolute latency is determined by a combination of data rate (frequency) and CAS latency (CL) which means that 3200 CL22 is about the same as 2133 CL15.

To get absolute latency you can use this: (1/(DRAM frequency/1000))*CL

3200 CL22: (1/(1600/1000))*22 = 13.75
2133 CL15: (1/(1067/1000))*15 = 14.06

These numbers are the absolute latency in nanoseconds for data transfer.

**DDR means Double Data Rate so for example 3200 is actually megatransfers while the actual frequency is 1600Mhz

If you really want to dig into more detail: https://www.anandtech.com/show/16143/insights-into-ddr5-subtimings-and-latencies

 

[maxim45001]

JEDEC timings recently have all been done keeping relative parity across the board for absolute latency. Absolute latency is determined by a combination of data rate (frequency) and CAS latency (CL) which means that 3200 CL22 is about the same as 2133 CL15.

To get absolute latency you can use this: (1/(DRAM frequency/1000))*CL

3200 CL22: (1/(1600/1000))*22 = 13.75
2133 CL15: (1/(1067/1000))*15 = 14.06

These numbers are the absolute latency in nanoseconds for data transfer.

**DDR means Double Data Rate so for example 3200 is actually megatransfers while the actual frequency is 1600Mhz

If you really want to dig into more detail: https://www.anandtech.com/show/16143/insights-into-ddr5-subtimings-and-latencies

I'm sorry , I'm really not that deep into memory stuff haha so dont really understand this . Would cl22 hold me back considering my motherboard capabilities ?

 

[thestryker]

I'm sorry , I'm really not that deep into memory stuff haha so dont really understand this . Would cl22 hold me back considering my motherboard capabilities ?

With higher speed memory you'd be gaining capacity and bandwidth for a slight latency penalty. I doubt you will notice any difference in performance in most things and those that are different will depend on whether they're memory latency sensitive or bandwidth sensitive.

 

[maxim45001]

With higher speed memory you'd be gaining capacity and bandwidth for a slight latency penalty. I doubt you will notice any difference in performance in most things and those that are different will depend on whether they're memory latency sensitive or bandwidth sensitive.

So all of the people in the forums that say cl22 is horrible are half right ?

 

[thestryker]

So all of the people in the forums that say cl22 is horrible are half right ?

Yes, but only from the standpoint of you always want the lowest latency you can get. As with everything in life context matters.

Ideally you would have a motherboard that could just supported XMP/manual settings so you could get the best of both worlds.

 

[maxim45001]

Finally got the new ram - just weird that the dram frequency is 1463.1mhz and not 1466.5mhz (total 2933mhz)
could anyone look at the cpu z photo and say if everything is as it should be ?

https://imgur.com/a/ajs05sQ

View: https://imgur.com/a/ajs05sQ

https://imgur.com/a/SH6ocHH

View: https://imgur.com/a/SH6ocHH

 

[thestryker]

Seems like it's fine, and sometimes the clocks are slightly off like that. When it's that close to what it should be and you have no direct control over it I don't think it's anything to worry about.

Generally it has to do with the memory controller ratios and since the CPU itself was designed for 3200 not much consideration may have been put into lower configurations.

 

[Zerk2012]

Finally got the new ram - just weird that the dram frequency is 1463.1mhz and not 1466.5mhz (total 2933mhz)
could anyone look at the cpu z photo and say if everything is as it should be ?

https://imgur.com/a/ajs05sQ

View: https://imgur.com/a/ajs05sQ

https://imgur.com/a/SH6ocHH

View: https://imgur.com/a/SH6ocHH

The way it reads it is not exactly 1/2 so everything is fine.

 

[SkyNetRising]

could anyone look at the cpu z photo and say if everything is as it should be ?

Looks good. Adequate for your system.