RGB Lighting: can I turn it off completely?!

[joeg]

Last time I built a PC, the RGB craze wasn't a thing. To confirm - I can turn the lights off, but just have to use software to do so, and that could be done by an msconfig startup of whatever application.

The thing you can't do is have the lights be off automatically after POST (unless perhaps that's a feature native to the particular motherboard?).

Do I have all that correct? I've got an order in for some Trident Z RGB modules right now. They're on backorder, so cancelling is no big deal. And I don't want them if they'll always be on forever...

[emissary42]

GDM on being the default for higher memory ratios is why the AMD models use even CAS latencies, since it would otherwise be rounded up. It is a technical platform limitation and has nothing to do with better or worse or any other timings.

[MaurizioCorallo]

These typically are Hynix 8Gbit CJR and are a bit different. Since they are specced for 3600 that frequency should not be an issue, for any compatible MB. If 1T with GDM off is possible is more an issue of CPU/MB than the memory itself and might require some manual adjustments. From a certain frequency onwards AM4 uses GDM on by default which basically equals "1,5T" and is why most of the AMD kits use even values for CAS latency (uneven numbers automatically get rounded up).

If manual overclocking to 3600 is on the table the classic 3200 CL14 spec might also be a valid option:

https://www.gskill.com/product/165/1...5V32GB-(2x16GB)

Given enough voltage they should do 3600 CL14 and with tighter timings (tRFC, tRCD/tRP) than what is possible with Hynix 8Gbit CJR based kits.

[emissary42]

But is it true that even timings are better?

Who said that? In general for most timings lower is better, with only few exceptions (like tREFI).

[MaurizioCorallo]

I understood that GDM and secondary timings are separated matters. But is it true that even timings are better?

Is there a list of motherboard which are better in GDM regards? (I will probably upgrade my motherboard to get wifi, BT )

[emissary42]

Please read again. GDM only affects CAS latency and no other timings. So a tRCD/tRP of 15, 17, 19 does not matter in that regard.

It can vary if GDM off 1T works at DDR4-3600 with a certain CPU/MB/RAM combination. So unless you are willing to mess with manual settings, just try if it does and otherwise accept the default GDM on (it is for a reason). There are other timings that are more important overall regardless.

[MaurizioCorallo]

In italy F4-3200C14D-32GVK is 223€ and F4-3600C16D-32GVK is 167€.

I do not like to overclock so I would rather a fast 3600 kit and running it at stock

Are you telling me the 3600 kit with CL16-19-19-39 timings is likely to go 16-20-20-40 because of uneven numbers?

There is a crucial kit running 3600 16-18-18-38 the costs 156€, any reason the F4-3600C16D-32GVK is better? Because this has even number.

For now I have an asus prime x470 pro and a 3700x, is there a list of motherboards cabable to run 3600 with GDM off?

[emissary42]

These typically are Hynix 8Gbit CJR and are a bit different. Since they are specced for 3600 that frequency should not be an issue, for any compatible MB. If 1T with GDM off is possible is more an issue of CPU/MB than the memory itself and might require some manual adjustments. From a certain frequency onwards AM4 uses GDM on by default which basically equals "1,5T" and is why most of the AMD kits use even values for CAS latency (uneven numbers automatically get rounded up).

If manual overclocking to 3600 is on the table the classic 3200 CL14 spec might also be a valid option:

https://www.gskill.com/product/165/1...5V32GB-(2x16GB)

Given enough voltage they should do 3600 CL14 and with tighter timings (tRFC, tRCD/tRP) than what is possible with Hynix 8Gbit CJR based kits.

[MaurizioCorallo]

ok thank you that was very clear about temperature.

what do you think of theese?

https://www.gskill.com/product/165/1...5V32GB-(2x16GB)

would they be able to run @3600 with 1T?

[emissary42]

No idea, to be honest and I don't think temperature sensors are part of the specification for any model either. There is an official statement about that somewhere in the forums...

Edit, found it:
https://www.gskill.us/forum/forum/ge...585#post164585

[MaurizioCorallo]

ok they are not available in Italy yet anyway do they have temperature sensors as the trident?

[emissary42]

Maybe one of these two?

https://www.gskill.com/product/165/1...0V32GB-(2x16GB)
https://www.gskill.com/product/165/1...0V32GB-(2x16GB)

Just be aware that going super tight on timings might require direct airflow for the modules, esp with higher ambients.

[MaurizioCorallo]

thank you emissary42 , i would like to run at 3600 with low timings (I have a ryzen 3700x). I do not overclock usually. I need a dual rank kit, Which one is best for this case?

[emissary42]

There are some very high end B-Die available in the Ripjaws V series, too.

https://www.gskill.com/product/165/1...50V16GB-(2x8GB)

https://www.gskill.com/product/165/1...45V16GB-(2x8GB)

https://www.gskill.com/product/165/1...50V16GB-(2x8GB)

and then there are also the new 4000/4266/4400 16-19-19 models:

https://www.gskill.com/community/150...16-Memory-Kits

[MaurizioCorallo]

Me too was interested about this topic, we were talking about this on techpowerup forum.

So absolutely no way to completely turn off rgb?

The problem is that only trident line has b-die and faster spec