Discussion Zen 5 Builders thread

[AdamK47]

Or you could use this: https://www.startech.com/en-eu/hdd/pex4sff8639u3

That is an option on my X670E with the 4X slot at the bottom of the board. Thought about it a while ago.

Was just curious about the SlimSAS on the newer board.

 

[igor_kavinski]

Was just curious about the SlimSAS on the newer board.

An idea:

Get this: https://www.eproductsolutions.com/pcie-x8-gen4-with-redriver-to-slimsas-4i-sff-8654-dual-port-aic

Then get this: https://www.newegg.com/asrock-low-profile-slimsas-to-u-3-cable/p/N82E16816775083

Attach to the SlimSAS connector on the PCIe card and to the U3 port, attach some cheap U3 SSD. If it works, it will mean that the SlimSAS to U3 cable should work with the SlimSAS port on the mobo too.

But yes, quite a bit of money just to experiment and learn.

 

[AdamK47]

An idea:

Get this: https://www.eproductsolutions.com/pcie-x8-gen4-with-redriver-to-slimsas-4i-sff-8654-dual-port-aic

Then get this: https://www.newegg.com/asrock-low-profile-slimsas-to-u-3-cable/p/N82E16816775083

Attach to the SlimSAS connector on the PCIe card and to the U3 port, attach some cheap U3 SSD. If it works, it will mean that the SlimSAS to U3 cable should work with the SlimSAS port on the mobo too.

But yes, quite a bit of money just to experiment and learn.

I don't want something that has to be used in the 2nd full length slot. That would cut the primary to 8x.

 

[lopri]

Has anyone with ASUS board fiddle with memory impedance values? ProcODT, DriveStrength, etc. I cannot seem to change those values, at least not in the way I am doing. Are there rules that I need to follow, e.g. certain values need to be paired, x value cannot excced y, etc.?

Trying to make odd memory combination work. I recently upgraded to 2x48GB from 4x16GB, and wonder if I can make 4 mismatched sticks work together. (2x48GB + 2x16GB)

 

[AdamK47]

Has anyone with ASUS board fiddle with memory impedance values? ProcODT, DriveStrength, etc. I cannot seem to change those values, at least not in the way I am doing. Are there rules that I need to follow, e.g. certain values need to be paired, x value cannot excced y, etc.?

Trying to make odd memory combination work. I recently upgraded to 2x48GB from 4x16GB, and wonder if I can make 4 mismatched sticks work together. (2x48GB + 2x16GB)

I played with it a bit about a year ago. Not on mismatched DIMMs. Tried to get 6400 stable on two 32GB modules. It didn't make an appreciable difference and only resulted in me having to clear/reset BIOS settings.

Do you really need the extra 32GB of memory? Could just dial back speed and primary timings.

 

[igor_kavinski]

I recently upgraded to 2x48GB from 4x16GB, and wonder if I can make 4 mismatched sticks work together. (2x48GB + 2x16GB)

What speed do the Auto settings give you when you populate all the slots? Note down the values the Auto mode arrives at and then start experimenting, decreasing timings or increasing voltages and speeds until you reach stability. It's a painful process so be ready to tear your hair out.

Depends a lot on the memory chips too. I had a Samsung kit that was awful and wouldn't budge beyond 4600 MT/s on my Z790 mobo. Got a Teamgroup 7600 MT/s kit with I think Hynix chips and it went all the way to 7000, the max supported by my mobo.

 

[Hail The Brain Slug]

Trying to make odd memory combination work. I recently upgraded to 2x48GB from 4x16GB, and wonder if I can make 4 mismatched sticks work together. (2x48GB + 2x16GB)

Things might be different with your board or with modern AGESA but last year when I upgraded from a 2x16GB SR kit to a 2x32GB DR kit, I made an attempt to run 2x48GB (16+32) per channel.

No matter what I tried the system would never POST at all under any circumstances. I figured the IMC just couldn't deal with mismatched rank dimms.

 

[igor_kavinski]

No matter what I tried the system would never POST at all under any circumstances.

How long did you wait? Maybe the training time increases a lot with mismatched DIMMs?

I would try myself but I hate that the heatsink is above the DIMM slots and I don't want to remove it unless I absolutely have to.

 

[lopri]

Same thing here. I was not able to boot with 4 sticks (2x48GB + 2x16GB). I had been running 4x16GB (2x16GB Samsung and 2x16GB Hynix DIMMs) for the past year without an issue, which made me think why not.

Do you really need the extra 32GB of memory? Could just dial back speed and primary timings.

I run VMs in a ram disk. You should try it. It's very responsive and also very secure.

This is what Zentimings reads on my current 2x48GB setup:



ProcOdt 240 seems excessively high. Most others I've seen online for 4 sticks of DIMMs are 60 or below, so I was thinking that might be the culprit. But when I tried to change that value in the BIOS even just for 2 sticks, the changes I make do not seem to apply. (?)

 

[igor_kavinski]

I had been running 4x16GB (2x16GB Samsung and 2x16GB Hynix DIMMs) for the past year without an issue, which made me think why not.

Try mismatched DIMMs in the same channel, i.e. 48GB paired with 16GB on the preferred slots channel. If that boots, populate the other channel.

 

[Hail The Brain Slug]

How long did you wait? Maybe the training time increases a lot with mismatched DIMMs?

I would try myself but I hate that the heatsink is above the DIMM slots and I don't want to remove it unless I absolutely have to.

Preaching to the choir here. I gave it plenty of time. I'd one of the guys that gives this advice out - Turn it on and walk out of the room, come back later.

 

[igor_kavinski]

Preaching to the choir here.

Did you happen to try on your own what I suggested in post #260?

 

[lopri]

Try mismatched DIMMs in the same channel, i.e. 48GB paired with 16GB on the preferred slots channel. If that boots, populate the other channel.

That is not something I have not tried yet. I will do that over the weekend. Thx for the pointer

 

[Hail The Brain Slug]

Did you happen to try on your own what I suggested in post #260?

Had not tried. Hilariously I ended up buying (again) the exact same kit I sold to you for my test bench when I set it up so I do have dimms I could try with if I get some motivation.