RAM upgrade question

[jm_bmw]

Hello everyone,

 

This is my current setup:

9900KF (stock)

Aorus Z390 Elite

2x8Gb Crucial Ballistix 3600C16 micron rev-E 

 

I am not using XMP, all primary XMP timings are set manually and command rate to 1T. Everything else is on auto. VCCIO/SA at 1.12/1.22v and 1.35v mem/training voltage. It has been like this for almost an year rock solid.

 

I am looking to upgrade adding another kit of these for 32Gb. Will it increase memory performance (c/r/w results) or most likely lose in latency? also, will need to increase vccio/sa to handle 4 modules or maybe use 2T? 

 

I am confused about ranks/dual-channel, if I had for example 2x16gb DR sticks, would it perform same as 4x8gb SR config? is there any advantage in running 4 modules?

 

[WereCat]

2x16GB Dual Rank in Dual Channel = 4x8GB Single Rank in Dual Channel

4x16GB Dual Rank in Dual Channel = Quad Rank in Dual Channel

 

More ranks = a bit higher bandwidth, usually in the Copy but also a bit higher latency. Quad Rank is stresfull on the memory controller and may limit your OC capability greatly.

[Hardware Guy]

Hi JM:

I am recently learning RAM and I come across this video on Youtube which is in Chinese. He did a decent job in explaining D type (Z490 Motherboard or newer) Or T-type Z390 Motherboard or Older except for MSI which adopt D type in Z390.

 

I think there is no subtitle.

So based on his explanation, that your motherboard is a T type memory to CPU routing and therefore by putting in all 4 dims it will increase memory performance not much but about 5 percent. That is from 90-95 percent.  And all Z490 Mother board or newer it is best to use 2 ram (the 2 that is furthest from the CPU) slot and achieving about 95 percent as well.

However, if on Z490 newer or MSI Z390 boards that is all with Daisy chain or D type routing with 4 slots RAM all used, ram performance is abut 90 percent. Therefore, nowadays ITX boards tends to be easier to do ram clocking, since it only got 2 slots, each with its own channel and the over all distance is also shorter to CPU, so it can achieve 100 percent of the performance.

99.99999% of the time using 4 slots for 32GB is because of RGB effects, and in high frequency low latency RAMS that comes in pack of 4 is significantly more expensive than the pack of 2 with same size. This is because higher quality chis are required to get the targeted performance.  

[Nena Trinity]

 

 

[jm_bmw]

Thanks for all replies! so my motherboard is T-topology, do you guys think that the 9900KF memory controller can handle these 4x8gb single rank modules at 3600Mhz 16-18-18-38 CR2 on current VCCIO/SA 1.12/1.22v? will it be pushing too much trying to keep them at CR1? 

 

I am concerned that it might have issues and I will end having to drop frequency, which means wasting money on a 3600Mhz kit were their cheaper 3000Mhz C15 would fit better.

[Hardware Guy]

2 minutes ago, jm_bmw said:

Thanks for all replies! so my motherboard is T-topology, do you guys think that the 9900KF memory controller can handle these 4x8gb single rank modules at 3600Mhz 16-18-18-38 CR2 on current VCCIO/SA 1.12/1.22v? will it be pushing too much trying to keep them at CR1? 

 

I am concerned that it might have issues and I will end having to drop frequency, which means wasting money on a 3600Mhz kit were their cheaper 3000Mhz C15 would fit better.

9900KF can handle the specs of your RAM with no problem, but I doubt if any ram will do 1.2V 3600MHZ CL16 in the form of 4 dims. You will need 1.35V rams and a motherboard that has sufficient VRM to support the voltages.

[Nena Trinity]

5 hours ago, jm_bmw said:

Thanks for all replies! so my motherboard is T-topology, do you guys think that the 9900KF memory controller can handle these 4x8gb single rank modules at 3600Mhz 16-18-18-38 CR2 on current VCCIO/SA 1.12/1.22v? will it be pushing too much trying to keep them at CR1? 

 

I am concerned that it might have issues and I will end having to drop frequency, which means wasting money on a 3600Mhz kit were their cheaper 3000Mhz C15 would fit better.

Worst case scenario is it will refuse to boot at all with 2 new sticks since if you call the manufacturer they will say "did we sell this as a 4x8GB kit? No? Well fuck you that is your problem!" second worst is the sticks may have to set down some MHz such as going from 3600MHz to 3200MHz to make it run or loosen the timings and BEST SCENARIO is all works and no issues hurray!

[jm_bmw]

20 hours ago, Hardware Guy said:

9900KF can handle the specs of your RAM with no problem, but I doubt if any ram will do 1.2V 3600MHZ CL16 in the form of 4 dims. You will need 1.35V rams and a motherboard that has sufficient VRM to support the voltages.

Oh sure, both ram/training voltages are set to default 1.35. What I mentioned was VCCIO/VCCSA.

 

15 hours ago, Nena Trinity said:

Worst case scenario is it will refuse to boot at all with 2 new sticks since if you call the manufacturer they will say "did we sell this as a 4x8GB kit? No? Well fuck you that is your problem!" second worst is the sticks may have to set down some MHz such as going from 3600MHz to 3200MHz to make it run or loosen the timings and BEST SCENARIO is all works and no issues hurray!

Yeah I also noticed this, Crucial doesn't make a 4x8 3600Mhz C16 kit... I wonder why...

 

Does anyone runs a simular setup? could you share VCCIO/SA voltages and frequency/timings used?

 

[Nena Trinity]

7 hours ago, jm_bmw said:

Yeah I also noticed this, Crucial doesn't make a 4x8 3600Mhz C16 kit... I wonder why...

 

Does anyone runs a simular setup? could you share VCCIO/SA voltages and frequency/timings used?

 

Well if it makes you feel more confidant I have had DDR3 HyperX & Patriot mixed but then both were Hynix so risk was minimal! With DDR4 I have a HyperX paired with a G.SKILL which are SK Hynix and Samsung ICs and that still ran fine! Even overclocked it from 2666MHz CL16-18-18-39-467 to CL13-15-15-30-415 and that gained some Cinebench R23 score! ;D (tough a example I had where it went bad was when I bought two Corsair DDR3-2133MHz kits and slapped them in a system, it had random BSOD and Memtest didnt find any error, I found a fix later tough and it was to set them to 1866MHz!) 2 out of 3 was good... UwU

[Guest]

11 minutes ago, Nena Trinity said:

Well if it makes you feel more confidant I have had DDR3 HyperX & Patriot mixed but then both were Hynix so risk was minimal! With DDR4 I have a HyperX paired with a G.SKILL which are SK Hynix and Samsung ICs and that still ran fine! Even overclocked it from 2666MHz CL16-18-18-39-467 to CL13-15-15-30-415 and that gained some Cinebench R23 score! ;D (tough a example I had where it went bad was when I bought two Corsair DDR3-2133MHz kits and slapped them in a system, it had random BSOD and Memtest didnt find any error, I found a fix later tough and it was to set them to 1866MHz!) 2 out of 3 was good... UwU

My 1366 has 2x Vipers and a dominator installed. One of the Vipers was bad. i7 980 900mhz 9-10-9-27-36.

 

On 3/2/2021 at 7:20 PM, jm_bmw said:

Hello everyone,

 

This is my current setup:

9900KF (stock)

Aorus Z390 Elite

2x8Gb Crucial Ballistix kit, 3600Mhz C16 micron E 

 

I am not using XMP, primary timings are set to "stock" settings except command rate (changed to 1T) everything else is on auto. VCCIO/SA at 1.12/1.22v and 1.35v mem/training voltage. It has been like this for almost an year rock solid.

System Agent is too high. You should be like 1.1v maybe. 

Use of 1.2v, probably for fast 4000mhz and tight timings.

 

The chip might handle the extra sticks. May or may not require a bit of memory training. Just depends on how the chip and board handle it. But Micron E-Die is good at being fast, so shouldn't be a big issue running 3600mt/s.