Is CL18 a big performance hit over CL16?

[akranjc71]

I use a R7 5800x and I am choosing between 16GB of Trident Z Neo 3600mhz CL16 and 32GB of Trident Z Neo 3600mhz CL18. 16GB costs 194,72€ (+15€ shipping) and 32GB costs 214,99€.

What is better bang for a buck? I suppose the 32GB kit. But is it much slower than 16GB kit?

I should make clear that the 32GB kit is 2x16GB and the 16GB kit is 2x8GB.

 

Edit: none of the kits have C on the end, they aren't GTZNC but GTZN

[Mateyyy]

No. The 32GB kit is certainly the better deal here.

[akranjc71]

7 minutes ago, Mateyyy said:

No. The 32GB kit is certainly the better deal here.

Does it run much slower tho?

[Fasauceome]

If you use more than 16GB of ram, it doesn't matter how low the latency is, you'll take a huge performance hit.

[akranjc71]

Just now, Fasauceome said:

If you use more than 16GB of ram, it doesn't matter how low the latency is, you'll take a huge performance hit.

Why is that?

[Fasauceome]

3 minutes ago, akranjc71 said:

Why is that?

If you run a program that needs more memory than you actually have, it will have to run on the page file of your storage drive. In windows that defaults to your boot drive, which I assume will be an SSD for you. An SSD is a lot slower than DDR4 (though the effect would be even worse with an HDD)

 

conversely, you will not gain any extra performance if you are not using more than 16GB of ram. Only playing video games, and you have 32GB of ram in your system? If your ram usage is under 16GB at all times, that extra 16GB on top will be sitting idle, doing nothing.

[Mister Woof]

Some small gains can be had on both Intel and AMD systems by having dual rank memory modules, or faked dual rank memory modules (4x8 single rank will behave like dual rank). This usually comes with more memory, but the increase in memory amount isn't what really improves performance, it's the configuration. 

 

Is it worth the extra money? That's hard to say. It's usually single digit gains.

[akranjc71]

1 minute ago, Fasauceome said:

If you run a program that needs more memory than you actually have, it will have to run on the page file of your storage drive. In windows that defaults to your boot drive, which I assume will be an SSD for you. An SSD is a lot slower than DDR4 (though the effect would be even worse with an HDD)

 

conversely, you will not gain any extra performance if you are not using more than 16GB of ram. Only playing video games, and you have 32GB of ram in your system? If your ram usage is under 16GB at all times, that extra 16GB on top will be sitting idle, doing nothing.

Oh, you meant the 16GB kit. I don't actually know what the RAM usage will be since the most RAM I've ever had is 8GB, but I'm planning to do rendering, virtualization, I will have many tabs opened in Chrome and on top of that I'll play games and stream and record them.

[Fasauceome]

2 minutes ago, akranjc71 said:

Oh, you meant the 16GB kit. I don't actually know what the RAM usage will be since the most RAM I've ever had is 8GB, but I'm planning to do rendering, virtualization, I will have many tabs opened in Chrome and on top of that I'll play games and stream and record them.

with virtualization, I think you will want as much ram as you can get, so the 32GB kit is a lot more appealing.

[freeagent]

I can run my ram pretty quick.. I can use tight timings as well. I have no qualms using 1.6v on my ram. That being said. I can lean on my system hard in a single rank config, and still not be able to make up the difference from running slower speeds in dual rank. For sure you will see more performance everywhere running 4x8 vs 2x8. Might not be a huge gain, but a gain is a gain. And up to 10% is hard to walk away from if you can get the ram cheap or you already have it..