Adding another pair of 2x16 GB RAM, can I mismatch timings?

[ExGreyFox]

1 minute ago, TKhaos said:

Probably find that QVL list was updated before the 2507 bios release, it's off there official website, shame they don't add dates when it was updated.

https://rog.asus.com/motherboards/rog-maximus/rog-maximus-x-formula-model/helpdesk_qvl/

 

Yeah, I don't see any mention of 2x32GB kits.

I don't know guys, what do you think? I could roll the dice and grab that 2x32GB kit from Amazon and give it a spin. Worst case it doesn't work and I simply return them right? 

[TKhaos]

1 minute ago, ExGreyFox said:

Yeah, I don't see any mention of 2x32GB kits.

I don't know guys, what do you think? I could roll the dice and grab that 2x32GB kit from Amazon and give it a spin. Worst case it doesn't work and I simply return them right? 

Yeah could do that, it's what I did with my Corsair memory and that's been fine, most people have issues when they try overclocking so I'm always skeptical when people claim it doesn't work.

Your memory is listed, just different timings the newer modules are faster.

If you look on the G.Skill site, just make sure I've used your correct motherboard these are the 64GB kits for your board. If your going to bite the bullet and just buy 64GB anyway have a look at some of the other kits because there are several faster speeds you could go for, just need to untick 3200 and choose what you want.

https://www.gskill.com/configurator?page=1&cls=1529635169&manufacturer=1524725352&chipset=1524723693&model=1532077071&adSearch2=Capacity§64GB (16GBx4),Tested_Speed§3200 MT/s,

[LucShep]

Yep, I agree. 
 

27 minutes ago, ExGreyFox said:

Yeah, I don't see any mention of 2x32GB kits.

I don't know guys, what do you think? I could roll the dice and grab that 2x32GB kit from Amazon and give it a spin. Worst case it doesn't work and I simply return them right? 

Again, and sorry for repeating myself.
Another scenario, and one that I now think is the route you should go for...  the RipjawsV F4-3200C16Q-64GVK (4x 16GB, 3200 16-18-18-38, 1.35v) is available at a good price: 

https://pcpartpicker.com/product/7Xbkcf/gskill-memory-f43200c16q64gvk

That RAM kit is also on their QVL for the Z370 ROG Maximus X Formula, which means it is listed as tested and compatible (so, peace of mind).  
https://www.gskill.com/qvl/165/184/1536139226/F4-3200C16Q-64GVK-QVL

The Trident Z RGB version (F4-3200C16Q-64GTZR) of same memory, which you'd prefer, is hardly found at stock and is overpriced at the moment (over $350, where available).

Edited July 24, 2024 by LucShep

[ExGreyFox]

1 minute ago, LucShep said:

Yep, I agree. 
 

Again, and repeating myself.
Another scenario, and one that I now think is the route you should go for...  the F4-3200C16Q-64GVK (4x 16GB, 3200 16-18-18-38, 1.35v) is available at a good price: 

https://pcpartpicker.com/product/7Xbkcf/gskill-memory-f43200c16q64gvk

That RAM is also on their QVL for the Z370 ROG Maximus X Formula, which means it is listed as tested and compatible (so, peace of mind).  
https://www.gskill.com/qvl/165/184/1536139226/F4-3200C16Q-64GVK-QVL

The Trident Z RGB version (F4-3200C16Q-64GTZR), which I know you'd prefer, is hardly found at stock and is overpriced at the moment (over $350, where available).

 

I think I will go this route and go ahead and get those RipJaws on order. 

Thank you guys very much!

F4-3200C16Q-64GVK ordered! 

[BitMaster]

Good choice,

 

my 2nd system, or better said my young son's rig, is my old 8700k with an Asus Z370 chipset and it was anything but RAM friendly.

If they don't boot or BSOD, try 2x 32GB and avoid 4 modules on Asus Z370 ROG boards, they are known to be tricky with 4 sticks and another complication on top, like low latency or fast MHz...

My 3600 16-16-16-16-26 kit only runs at 3000 without BSOD's, 3200 works almost but still occasionally shows BSODs, anything higher wont even boot the OS .

 

If I take 2 sticks out and just run 2 of them, they work with 3600 XMP right away, and fly north of 4000 with some extra Volts... just not 4 modules.

 

Mind that when you encounter errors, try just 2 on A2 and B2 and see if that works as intended.

[LucShep]

3 hours ago, BitMaster said:

my 2nd system, or better said my young son's rig, is my old 8700k with an Asus Z370 chipset and it was anything but RAM friendly.

If they don't boot or BSOD, try 2x 32GB and avoid 4 modules on Asus Z370 ROG boards, they are known to be tricky with 4 sticks and another complication on top, like low latency or fast MHz...

My 3600 16-16-16-16-26 kit only runs at 3000 without BSOD's, 3200 works almost but still occasionally shows BSODs, anything higher wont even boot the OS .

 

If I take 2 sticks out and just run 2 of them, they work with 3600 XMP right away, and fly north of 4000 with some extra Volts... just not 4 modules.

 

Mind that when you encounter errors, try just 2 on A2 and B2 and see if that works as intended.

Yes, 4 sticks of RAM can be sometimes complicated.

I think this is noticed more on lowest latency DDR4 kits, such as Samsung B-Die mem (3200/3600 14-14-14-34, 15-15-15-35, 16-16-16-36).
But then those can withstand tremendous tuning and voltages (OC'ers paradise, also why quite a bit more expensive), allowing to somewhat offset things.

The GSKILL F4-3200C16Q-64GVK kit has slightly more relaxed timings, it's either Hynix DJR or Micron Rev. B or E, usually less prone to such issues.
But, that said, it's also not unheard of. 

In my opinion, when using a 4x modules kit (regardless of speed/latency) it's always better to give a little more DRAM voltage over what is applied by XMP (about 0.05v).

  For example, that GSKILL F4-3200C16Q-64GVK kit is 1.35v. 
  So, in the BIOS, after loading the XMP profile, I'd then change the DRAM voltage to 1.40v.   
  And save/reboot....

Most DDR4 kits (including the Hynix DJR and Micron Rev. B or E kits) are supposed to withstand up to 1.45v with no problems whatsoever (though I wouldn't necessarily recommend that much), and with 4 sticks it's usually just a matter of giving it a little more juice, and/or relaxing a little bit the timings.
Always try that before quitting and RMA'ing the memory.

Mine are Micron Rev.E, and were okay with XMP loaded, but I decided to run them at 1.40v anyway, having had issues with other kits.  It has been like that for almost three years now (even overclocked from 3200 to 3466, and tighter sub-timings) and in two different systems (Z490 and Z690 boards).  Zero problems, also in whatever mem test. 

Edited July 26, 2024 by LucShep