What is more important in RAM? Low CL value or large clock speed?

[AlveKatt]

If I am looking at a ddr4 2133 with cl14 and a ddr4 2666 with cl15. Which should I choose? The prize gap between the two I have been looking at is suspiciously small, and they are the same make.

[jj9987]

2666 with CL15 is slightly faster, but nothing extraordinary.

[Guest]

18 minutes ago, AlveKatt said:

If I am looking at a ddr4 2133 with cl14 and a ddr4 2666 with cl15. Which should I choose? The prize gap between the two I have been looking at is suspiciously small, and they are the same make.

well, none look at the video by jayztwocents there is virtually no diffrence with speed, and i don't really know what CL is .

[Sintezza]

Technically lower CL makes more sense in certain workloads

Lower CL means faster acces times.

But for most people, it doesnt realy matter that much.

 

Cas latency basicly is the delay time between the memory controler communicating with the memory module, telling it what particular memory block it has to acces.

And the time that the data from the given array is availeble at the memory modules output pins.

To be more specific.

[Guest]

Chart for DDR3 you should look at

Lower CAS = Better and Faster = Better

You want the best of both worlds.

 

[AlveKatt]

Using the math in this video the 2133 is infinitesimally faster actually. Granted, that is for ddr3 ram, which is I think 32 bit while ddr4 is 64 bit, which might change the math quite a bit... Right? However, if the math is right regardless, you are paying extra for an unnoticable downgrade.

 

 

 

[Guest]

4 minutes ago, AlveKatt said:

Using the math in this video the 2133 is infinitesimally faster actually. Granted, that is for ddr3 ram, which is I think 32 bit while ddr4 is 64 bit, which might change the math quite a bit... Right? However, if the math is right regardless, you are paying extra for an unnoticable downgrade.

 

 

 

inb4 everyone thinks its a troll

[i_build_nanosuits]

8 minutes ago, Ronnie76 said:

inb4 everyone thinks its a troll

it is...check this guy channel he will teach you how to download more ram etc...nothing serious on this channel it's all garbage.

[Guest]

4 minutes ago, i_build_nanosuits said:

it is...check this guy channel he will teach you how to download more ram etc...nothing serious on this channel it's all garbage.

Your thinking of Thio Joe

This is Thio Joe Tech.

 

[porina]

You need to look at what benefits the application more. Most things just aren't very memory performance dependant so wouldn't see much if any benefit either way. In things I do, bandwidth rules over latency by a huge margin, so I'd go for higher speed first before even looking at the latency.

[i_build_nanosuits]

Just now, Ronnie76 said:

Your thinking of Thio Joe

This is Thio Joe Tech.

 

i see...VERY reputable source then...omg

[Guest]

5 minutes ago, i_build_nanosuits said:

i see...VERY reputable source then...omg

https://www.youtube.com/user/ThioJoeTech/videos

https://www.youtube.com/user/ThioJoe/videos

Literally

He's actually a good tech guy...

 

[Sintezza]

8 minutes ago, i_build_nanosuits said:

it is...check this guy channel he will teach you how to download more ram etc...nothing serious on this channel it's all garbage.

 

Well back in the Windows 95 + Msdoss era.

Installing a memory manager like Quaterdeck Qemm was a thing.

 

lol

[AlveKatt]

I am not your average user I guess. I don't play much games, but I do a lot of 3d-work. As in 3d-animation. I am a 3d-animation hobbyist. This is kind of a sub thread to this thread:

 

Things I can't do on my current computer that I want to be able to do on my new one:

Paint textures in the 3d view on high poly, subsurfed, characters

Use the sculpting tools on high poly multiresolution characters.

Move animation bones on high poly, subsurfed, characters without getting serious framerate lag.

Calculate physics, Cloth, soft body, hair and fur simulations in reasonable times.

Not get out of memory errors when I try to make a lawn with grass flowing in the wind.

[AlveKatt]

46 minutes ago, porina said:

You need to look at what benefits the application more. Most things just aren't very memory performance dependant so wouldn't see much if any benefit either way. In things I do, bandwidth rules over latency by a huge margin, so I'd go for higher speed first before even looking at the latency.

Do you know how I figure out what benefits Blender, the 3d-suite, more?

[DunePilot]

1 hour ago, AlveKatt said:

If I am looking at a ddr4 2133 with cl14 and a ddr4 2666 with cl15. Which should I choose? The prize gap between the two I have been looking at is suspiciously small, and they are the same make.

A lot of ram is essentially the same thing. Say... 2133 Cas 14 and 2400 Cas 15 2666 Cas 16 ram might literally be the same ram that was testing and verified to work at the diff settings and got slapped with a verified clock speed. Id say since the 2666 is two dividers higher and only 1 timing looser then its actually probably binned higher than the 2133 sticks in this case and is a slightly better set of ram.

[harrynowl]

The best is a balance. most xmp timings on kits are a bit looser than they need to be anyway ..

[SteveGrabowski0]

1 hour ago, AlveKatt said:

If I am looking at a ddr4 2133 with cl14 and a ddr4 2666 with cl15. Which should I choose? The prize gap between the two I have been looking at is suspiciously small, and they are the same make.

The latency (eg time delay) is actually lower on the CL15 DDR4-2666 kit than the CL14 DDR4-2133 kit, while the throughput is 25% better with the DDR4-2666 kit. The DDR4-2666 kit is easily better.

[SteveGrabowski0]

 

1 hour ago, AlveKatt said:

Using the math in this video the 2133 is infinitesimally faster actually. Granted, that is for ddr3 ram, which is I think 32 bit while ddr4 is 64 bit, which might change the math quite a bit... Right? However, if the math is right regardless, you are paying extra for an unnoticable downgrade.

 

 

 

 

Good video, but the DDR4-2666 kit has lower latency associated with the column address strobe (eg CAS).

 

CL 14 DDR4-2133 has time delay

t = (14 cycle) / (1066.5 * 10^6 cycle / second) = 13.13 nanosecond

 

CL 15 DDR4-2666 has time delay

t = (15 cycle) / (1333 * 10^6 cycle / second) = 11.25 nanosecond

 

Note this uses the conversion factors

1 Hz = 1 cycle / second

1 MHz = 10^6 Hz

so 1 MHz = 10^6 cycle / second

 

And 1 nanosecond = 10^(-9) second

[porina]

18 minutes ago, AlveKatt said:

Do you know how I figure out what benefits Blender, the 3d-suite, more?

I'm not familiar with that myself. You can try and search to see if other people have already tested that application in that way. From the other reply, it sounds like you need to make sure you have enough ram first, then worry about performance. Again, you would have to research requirements.

[AlveKatt]

2 minutes ago, porina said:

I'm not familiar with that myself. You can try and search to see if other people have already tested that application in that way. From the other reply, it sounds like you need to make sure you have enough ram first, then worry about performance. Again, you would have to research requirements.

I have tried. The blender forums are full of artists, and when you ask a question like this you get five answers that all contradict each other and you end up even more confused.

 

But thank you all for the help. I think I'll be going for the 2666.

 

Just one thing, they aren't connected to hell, are they? I won't get sucked into hell if I listen to The number of the beast by Iron Maiden on a computer using them?

[porina]

17 minutes ago, AlveKatt said:

I have tried. The blender forums are full of artists, and when you ask a question like this you get five answers that all contradict each other and you end up even more confused.

 

But thank you all for the help. I think I'll be going for the 2666.

 

Just one thing, they aren't connected to hell, are they? I won't get sucked into hell if I listen to The number of the beast by Iron Maiden on a computer using them?

I don't know what your budget or local pricing is for you, but you can just get the fastest and hope for the best. While it would make a difference, how much of a difference is hard to tell and will also depend on the rest of the system anyway. Fix one bottleneck and it just moves onto the next one.

 

Just don't play music backwards and it should be ok

[arnavvr]

It actually depends on the Platform. On X58, the best sticks are actually 1600 C7 sticks, because the platform likes lower cas latency. On X79, Samsung sticks are King with the 2666 Trident X sticks being the best.

[AlveKatt]

51 minutes ago, porina said:

I don't know what your budget or local pricing is for you, but you can just get the fastest and hope for the best. While it would make a difference, how much of a difference is hard to tell and will also depend on the rest of the system anyway. Fix one bottleneck and it just moves onto the next one.

 

Just don't play music backwards and it should be ok

The place I am planning to buy from has this neat feature where you can save a list of planned purchases and share it:

https://www.komplett.se/k/shoplist.aspx?mode=receive&si=1675149&su=B66D99DB-DCF8-410F-94FE-5F1E1968EE12

I guess it's a marketing thing.

 

But this is the ram forum, so to not be off topic any discussion about other parts should be in my other thread in the new builds and planning forum, so as not to piss off moderators.

Though honestly, I have been trying to analyze this build for so long now and it's stressing me out. So unless someone finds a "No, wait, that component is gonna fuck everything up!" thing, I think I am done.

 

Edit: I forgot; thank you so much for the help. I was completely lost before, and I feel a little less lost now.