CL 15 and CL 17

[Vikkun]

Is ddr4 8gb 2133mhz CL15  better than 2400 mhz CL17 

[ricksteendam1]

4 minutes ago, Vikkun said:

Is ddr4 8gb 2133mhz CL15  better than 2400 mhz CL17 

depends on what your planning to use for but for most typical users the 2400mhz kit will be better

[Vikkun]

1 minute ago, ricksteendam1 said:

depends on what your planning to use for but for most typical users the 2400mhz kit will be better

For games and programming stuff 

[ricksteendam1]

Just now, Vikkun said:

For games and programming stuff 

then the faster kit will be better but your upgrading your existing system or?

[Vikkun]

7 minutes ago, ricksteendam1 said:

then the faster kit will be better but your upgrading your existing system or?

 

7 minutes ago, ricksteendam1 said:

then the faster kit will be better but your upgrading your existing system or?

By faster you meant 2400 mhz one?

And I am just using that one in my new system so just wanted to know

[_Aontaigh_]

I would probably purchase whatever is the cheaper of the two.

 

The 2133MHz CL15 kit would slightly edge the 2400MHz CL17 kit, that extra 267MHz doesn't make sense for much looser timings.

[Vikkun]

19 minutes ago, _Aontaigh_ said:

I would probably purchase whatever is the cheaper of the two.

 

The 2133MHz CL15 kit would slightly edge the 2400MHz CL17 kit, that extra 267MHz doesn't make sense for much looser timings.

I was getting both at same prices and choose  cl17 one 

[_Aontaigh_]

19 minutes ago, Vikkun said:

I was getting both at same prices and choose  cl17 one 

 

Performance difference would be negligible anyway.

 

If you really want to squeeze every last drop of performance out of that kit, you could bump the voltage up to around 1.4v, the frequency to 2600MHz and slightly tighten the timings (i.e. CL16).

[porina]

A bit late to reply, but I think in short outside of benchmarks you wouldn't be able to tell the difference. Also you can't just blanket say latency is better than bandwidth, it really does depend on the application. One of my compute use cases scales with bandwidth and latency hardly affects it at all.

[Vikkun]

23 minutes ago, _Aontaigh_ said:

 

Performance difference would be negligible anyway.

 

If you really want to squeeze every last drop of performance out of that kit, you could bump the voltage up to around 1.4v, the frequency to 2600MHz and slightly tighten the timings (i.e. CL16).

I see is it safe to do it? 

And how to do it? 

[Vikkun]

14 minutes ago, porina said:

A bit late to reply, but I think in short outside of benchmarks you wouldn't be able to tell the difference. Also you can't just blanket say latency is better than bandwidth, it really does depend on the application. One of my compute use cases scales with bandwidth and latency hardly affects it at all.

Thanks for the details. For benchmarks when i tested cl15 in my friend's pc the only difference i noticed was the reading writing  speed in single core. 

As multi core the speed was same

[_Aontaigh_]

11 hours ago, Vikkun said:

I see is it safe to do it? 

And how to do it? 

 

It's not particularly worth the hassle if you've never experimented with overclocking before. We're taking minimal gains for something you could spend hours upon hours doing [And ripping your hair out while you're at it....]

[DarkSmith2]

2133 CL15 =  (15/1066,5)*1000 = 14,06ns

2400 CL17 = (17/1200)*1000 = 14,16ns

 

But depending on cache and other factors like application the ddr4 2133 might be a bandwidth bottleneck. Other than that, both should perform pretty similar, and both are pretty slow..

[Vikkun]

4 hours ago, _Aontaigh_ said:

 

It's not particularly worth the hassle if you've never experimented with overclocking before. We're taking minimal gains for something you could spend hours upon hours doing [And ripping your hair out while you're at it....]

Haha then i will leave it as it is, thanks ~

[Vikkun]

3 hours ago, DarkSmith2 said:

2133 CL15 =  (15/1066,5)*1000 = 14,06ns

2400 CL17 = (17/1200)*1000 = 14,16ns

 

But depending on cache and other factors like application the ddr4 2133 might be a bandwidth bottleneck. Other than that, both should perform pretty similar, and both are pretty slow..

Wow that was a quick maths, thanks~

[geo3]

What chip? If it's Ryzen the faster ram will be better regardless of timings because of infinity fabric. 

[Vikkun]

2 hours ago, geo3 said:

What chip? If it's Ryzen the faster ram will be better regardless of timings because of infinity fabric. 

Kingston and processor is intel