Ryzen 5900X and 3000 mHZ ram kit - Do I finally upgrade?

[StealthArsenal]

Hello Everyone. 

A couple of months back, I upgraded from my i7 5820X (X299) setup to a Ryzen 9 5900X and AM4 motherboard (X570 Aorus Master). I elected to reuser my quad channel memory kit which is a Corsair CMU32GX4M4C3000C15. For the sake of not making everyone look this up, it is a 32gb (4x8gb) kit rated at 3000 mHZ and a CAS Latency of 15.  As with my upgrade, I had intended to slowly rebuild the entire system (i.e. memory, nvme SSD, graphics card, etc). I am considering upgrading the ram to a 3600 mHZ kit that has a CAS latency of 18 and/or CAS 16 ( both Trident Z Neo Kits - 32gb). Given that fact that having a lower CAS is generally better, my question is would I be better suited to continue using my 3000 mHZ kit or would the 3600mHZ be a better bet even at a higher latency to pair with the 5900X given Ryzen's demand for faster memory in general.

 

I don't benchmark things nearly as much as I used to anymore so I am not sure I recognize the percentage points outside of those numbers. I think my thoughts were more along the lines of okay, I have an older 3000 mhz quad kit now. Would I even notice going to 3600. I mean my system runs just fine. I could probably just grab a couple gen 4 nvme drives instead, but I felt I needed to ask the question.

Thanks in advance

[Eigenvektor]

11 minutes ago, StealthArsenal said:

I am considering upgrading the ram to a 3600 mHZ kit that has a CAS latency of 18 and/or CAS 16 ( both Trident Z Neo Kits - 32gb). Given that fact that having a lower CAS is generally better, my question is would I be better suited to continue using my 3000 mHZ kit or would the 3600mHZ be a better bet even at a higher latency to pair with the 5900X given Ryzen's demand for faster memory in general.

Lower CAS latency is only generally better at the same speed, because it is measured in clock cycles. So a higher number at a higher clock speed can actually translate to lower overall latency. Higher clock means there are more clock cycles in the same amount of time, i.e. a clock cycle takes less time. So 16 clock cycles at 1800 MHz actually take less time than 15 clock cycles at 1500 MHz.

 

CL15 @ 3000 MT/s (1500 MHz) = 10 nanoseconds

CL 18 @ 3600 MT/s (1800 MHz) = 10 nanoseconds

CL16 @ 3600 MT/s (1800 MHz) = 8.88 nanoseconds

 

So 3600 MT/s RAM with CL 16 would both be faster and have a lower absolute latency.

[YoungBlade]

Will faster RAM show better results in benchmarks? Yes. Would you actually notice it in practice? Probably not.

 

You already have 4 sticks, so you've got dual-rank operation going, and 3000 CL15 isn't exactly dirt slow - it's not like you're running 2133.

[Somerandomtechyboi]

Just overclock the sticks to 3200mhz or higher

 

Also tridentz neo are overclocking rams, very stupid choice if you intend tonleave stock and not overclock cause they are b die rams

[Mister Woof]

Agreed, giving over locking a shot first before buying.

 

If it works....cool. if not, then you can reassess.

[Guest]

1 hour ago, StealthArsenal said:

Hello Everyone. 

A couple of months back, I upgraded from my i7 5820X (X299) setup to a Ryzen 9 5900X and AM4 motherboard (X570 Aorus Master). I elected to reuser my quad channel memory kit which is a Corsair CMU32GX4M4C3000C15. For the sake of not making everyone look this up, it is a 32gb (4x8gb) kit rated at 3000 mHZ and a CAS Latency of 15.  As with my upgrade, I had intended to slowly rebuild the entire system (i.e. memory, nvme SSD, graphics card, etc). I am considering upgrading the ram to a 3600 mHZ kit that has a CAS latency of 18 and/or CAS 16 ( both Trident Z Neo Kits - 32gb). Given that fact that having a lower CAS is generally better, my question is would I be better suited to continue using my 3000 mHZ kit or would the 3600mHZ be a better bet even at a higher latency to pair with the 5900X given Ryzen's demand for faster memory in general.

 

I don't benchmark things nearly as much as I used to anymore so I am not sure I recognize the percentage points outside of those numbers. I think my thoughts were more along the lines of okay, I have an older 3000 mhz quad kit now. Would I even notice going to 3600. I mean my system runs just fine. I could probably just grab a couple gen 4 nvme drives instead, but I felt I needed to ask the question.

Thanks in advance

You're running a CPU that's capable of even much faster than 3600mt/s. Most people try and aim for at least RAM 3800 1:1 IF 1900. 

 

The achievement to run over 4000 would be 1:2 = RAM 2000mhz 1:2 1000mhz IF. 

You'll start making up the performance loss from the IF unlinked around 4267mhz.

 

Like cars, fast cost money. So you buy a really nice high end B-Die set that will pretty much cover and run whatever you want. 3600 CL14-14-14 will greatly improve your Latency. My B-Die sets with additional voltage will run that timing set at 4000mt/s, but I only run 16GB kits. @freeagentcan give you some really good pointers running 32gb and which kits he has you could consider for purchase. 

 

Only to really bring up the performance because it's there. 

You're basically running the speeds Zen+ is capable of right now. 

my 2700X is capable of 3733mhz. You should be able to spank on that with your rig.

 

Good Luck homie.

 

[Pharr Carnell]

I have a 5950X and Trident-Z Neo RGB...ATM am running a 64 GB of 3600 set in my main PC...I also have a 5800X with Trident-Z Neo RGB modules 3600 but only a 32 GB set...and I can tell you; they're NOT Samsung "B" die at all...they're Hynix "M" die. Straight off the bat at install, set XMP and they ran at 3600....after a full new Windows install I dabbled a little with some overclocking [just upped the Dram Frequency in the BIOS] and they've been running for weeks now at 3800...and I haven't bothered to try any higher...see pics for verification of my rebuttal here...

 

Note to myself...get a better quality picture of the rig's setup...

[freeagent]

Sweet!

 

Ok, so knowing those are 3000C15, this is where I would start.. you might be running 16-15-15 right now, we can fix that.

 

Reset your bios to full stock save and exit and go back in. You should be running slow now.. but slow is good. Set to 15-15-15-15-36. Now all of those other timings you see, enter them manually to the values they show, so they don't say auto. Now that you are at the bottom, you should see the option for 1T/2T.. go ahead and select 2T, you need to do that to run odd CL, and while you are there turn GDM off. Go back and set memclk to 3200, fclk to 1600, set dram voltage to 1.45 for S-N-G save and exit and see what happens.. 

 

Edit:

 

Some of those secondary's may show 2 values, leave that to auto, and if you have a value of 0, leave it to 0..

[StealthArsenal]

@freeagent

 

Went ahead and gave your settings a shock.  I will say, I was unable to find the memclk and fclk settings, but was able to manipulate it the way the Gigabyte Bios is, so no harm no foul.  With that said, I was unable to settle in at those timings and memclock speed.  It resulted in a no post.  I was able to tweak a timing here or there from the XMP profile but I cannot get anything more than 15-17-17-35-52 @ 1.35.   This also happens to be what the XMP profile is.  As soon as I push to 3200 it won't post and auto resets the bios back.  I also feel at this XMP profile, the machine is sluggish, but perhaps that is just me. 

 

I will say that the bios does read the system at 15-15-15-15-36, but it won't actually run at that.  This is when it is all set to auto however. 

[freeagent]

2 minutes ago, StealthArsenal said:

Went ahead and gave your settings a shock. 

 

Ahh sorry about that.. it was just a stab in the dark for me