Ram Speed

[caanrobert1]

Hello everyone, i am having trouble with my ram speeds. I have 4000mt/s ram but its stuck at 2666. I have tried using XMP but every time i turn it on in bios, my pc wont boot and i have to reset the mobo. Anyone have any idea how to fix this? thanks
PC specs:
Mag b550 Tomahawk mobo
Ryzen 9 5900x cpu
G.skill Trident Neo 4000mt/s 64gb (4x16) ram
Rtx 3080 ti gpu

 

[Brian Boru]

Welcome to the forum

Is the RAM on the mobo QVL?

 

[caanrobert1]

Welcome to the forum

Is the RAM on the mobo QVL?

Thank you! and yes it is. its listed on the msi website under my mobo. could it be because they have it listed as 2x16 32gb instead of 64?

 

[Colif]

G skill haven't tested ram that runs at 4000 on that board. So I can't confirm from that angle.

link

What are the codes of the ram? should be F4 4000 something

I see F4-4000C18D-16GTZ on the qvl but its 2 x 8gb sticks
their qvl page is so annoying, you can't search by brand name. And its so long... no way to sort it easily.

could it be because they have it listed as 2x16 32gb instead of 64?

yes, because it is harder to get 4 sticks to work together than 2.

the codes should be different. the the number before GTZ means the set size. Not stick size.

 

[caanrobert1]

(F4-4000C18D-32GTZN) this is the code, shouldd i try taking 2 sticks out?​

 

[Colif]

is that one set of ram or 2?

F4-4000C18D-32GTZN - Overview - G.SKILL International Enterprise Co., Ltd.

Engineered and optimized for full compatibility on the latest AMD Ryzen platforms, Trident Z Neo brings unparalleled DRAM memory performance and vibrant RGB lighting to any gaming PC or workstation with latest AMD Ryzen CPUs and AMD DDR4 motherboards.

www.gskill.com

cause G Skill show it as 32gb as well.

if they 2 different sets of the same ram, then... yes, take 2 sticks out. See if that helps.
Did you make PC?

sticks in sets only tested to work with each other. Adding extras that weren't tested can mess with timings.

 

[caanrobert1]

yes i bought 2 sets bc i wanted 64gb but ill try just running 2 sticks 32gb, thank you

 

[caanrobert1]

it should go in the second and fourth slot correct?

 

[Colif]

it should go in the second and fourth slot correct?

yes. as per your manual https://download.msi.com/archive/mnu_exe/mb/MAGB550TOMAHAWK.pdf

Best idea if you want 64gb is buy it as one set. Also helps if its on the QVL for size you are after. Or if ram maker has tested it themselves.

 

[caanrobert1]

so how do i know what memory i have? when i click a different one it shows different ram.

MSI MAG B550 TOMAHAWK AMD AM4 DDR4 CF M.2 USB 3.2 Gen 2 HDMI ATX Gaming Motherboard

Powered by AMD Ryzen AM4 processors, the MSI MAG B550 TOMAHAWK inspired by the military armor design, tuned for better performance by Core boost, DDR4 Boost, Lightning M.2 with M.2 Shied

us.msi.com

 

[Colif]

if its in the PC now, you can run this: https://www.cpuid.com/softwares/cpu-z.html
go to SPD tab and it can show you the codes in the part number column, for all the sticks, just need to pick the slots to change descriptions.

 

[caanrobert1]

When you open the link i sent theres 4 different tabs you can click about the supported ram. i need to know which one i need to be on. the first one says memory by RX-5x00G/GE, is that the one i should be on?

 

[Colif]

2nd tab. Memory by 5xxxx

5X00G are APU, as are 4000 series
for example - https://www.amd.com/en/products/apu/amd-ryzen-7-5700g
5000 & 3000 are CPU
for example - https://www.amd.com/en/products/cpu/amd-ryzen-9-5900x

difference is APU have graphics cores. And run slower

 

[caanrobert1]

i cant figure this out for the life of me, what ram would you prefer? i had crosair vengance rgb in the past and it still didnt run at what it was supposed too. but i also had it as 4x8

 

[Colif]

Problem I see is Asus haven't tested 64gb of ram at all. Highest is a set of 32gb

G Skill have tested 3600 with the board at 64gb sets - https://www.gskill.com/configurator...Capacity§64GB (16GBx4),Tested_Speed§3600 MT/s,

Corsair only tested as far as 3200mhz with board/CPU

https://www.corsair.com/ww/en/c/memory?filter=formatted_tech_specs.Memory%20Size%3A%3A64&type=findbycompatibility

Kingston tested 4k sticks but they all 8gb, the 16gb sticks are 3600. 5 sets of 64gb (4 x 16gb)

https://www.kingston.com/en/memory/search/model/101304/msi-mag-b550-tomahawk-motherboard?speed=3600mt%2Fs&totalcapacity=64%20gb&capacity=16%20gb

there are other ram makers, this is just off top of head. I have used Corsair for ages myself.

 

[Kaamos_Llama]

Youll be incredibly lucky to get 4000 MT/s to work on a 5000 Ryzen without being very lucky AND knowing which voltages and timings to tweak.

3800 maybe, 3600 almost surely, which is why most recommend 3600 C16.

 

[Brian Boru]

their qvl page is so annoying, you can't search by brand name. And its so long... no way to sort it easily

If it's important, I could do that for you easily—if so, what output format do you want if it's not easily pastable here… TXT, PDF, CSV, XLSX, ??? And sorted by what columns—can be multiple simultaneous sorts. Where—Email, Online store, ???

 

[Colif]

Seems if I wanted 64gb of 3600 I would have to go to G Skill as Corsair didn't test anything of that size and speed. Not that I want new ram... its about only thing I didn't change this year. I just added 2 fake sticks.

think I will resist as its still only 2 sticks. Would leave gaps in my lighting.

Don't worry about it Brian.