Asus ROG Strix B650E-E Motherboard Ram Selection

The Stilt · Mar 5, 2024

ADHE said:
Well yeah but you can still force 1:1 mode up to 6800 in the best CPUs. Also running 8000mt/s it's pretty achievable in most CPUs. It doesn't give you an enormous performance gain compared to 1:1 mode, but you can run a lot lower vsoc....

How many verified cases you've seen, where a RPL (or a PHX) based CPUs is able to run at 3400MHz UCLK while maintaining sufficient margins (i.e., reliable in 24/7 use)?

Also, in case of extremely high MEMCLK frequencies such as the 8000MHz, the limit isn't the CPU itself but the motherboard. Achieving such frequencies require a high-end motherboard with good DRAM signaling, or preferably a 1 DPC board design.

Paramount · Mar 5, 2024

Ichirou said:
Has anyone tried 8,000+ MHz and measured its performance compared to a synced 6,000 MHz configuration? Is there enough of a gain to bruteforce past that performance loss?

theoretically YES ( 7600+ speed you gonna see a bit improvement over 6200 with tight timing )
but also depend in many factors like DDR die type .. IMC quality and FCLK synchronization

dansi · Mar 6, 2024

candasulas said:
RAM temperatures? How high does it go?

There are also these two more models.

G.Skill 64GB(2x32) Trident Z5 Neo RGB 6000mhz CL32 DDR5 AMD EXPO Ram (F5-6000J3238G32GX2-TZ5NR)

G.Skill 64GB(2x32) Trident Z5 Neo RGB 6000mhz CL30 DDR5 AMD EXPO Ram (F5-6000J3040G32GX2-TZ5NR)

These are also 64GB kits. If these were available, which one would you choose?

gskill ddr5 does not apply thermal pad on the pmic ic.
Corsair, Teamgroup, Klev are better options imo.
64gb is cheaper per gb than 48gb, if you need capacity.
64gb is usually dual ranked still, it gives abit more performance speed for speed than 32gb/48gb single ranked.

Teamgroup expert ddr5 64gb 6400MT 34-44-44 is good value.. Even 6000MT 34-44-44 is great and probably same IC as their 6400MT ones

ADHE · Mar 6, 2024

The Stilt said:
How many verified cases you've seen, where a RPL (or a PHX) based CPUs is able to run at 3400MHz UCLK while maintaining sufficient margins (i.e., reliable in 24/7 use)?

Also, in case of extremely high MEMCLK frequencies such as the 8000MHz, the limit isn't the CPU itself but the motherboard. Achieving such frequencies require a high-end motherboard with good DRAM signaling, or preferably a 1 DPC board design.

Well there is an asrock 1DPC board who can run 8000+ without issue, i bough a some of them for a couple systems for about 130/140 euros. Also if you are talking about 2DPC motherboards gigabyte seems to be the best manufacturer in that case, i have seen some users running 8000mt/s with boot to boot stability.
Regarding the 3400mhz uclk topic.... Its pretty rare to see such cpus, the vast majority of them runs 3200mhz uclk i only seen 1 cpu who can run 6800mt/s in 1:1 but i dont even remeber if it was with GDM enabled or disabled.

ADHE · Mar 6, 2024

dansi said:
gskill ddr5 does not apply thermal pad on the pmic ic.
Corsair, Teamgroup, Klev are better options imo.
64gb is cheaper per gb than 48gb, if you need capacity.
64gb is usually dual ranked still, it gives abit more performance speed for speed than 32gb/48gb single ranked.

Teamgroup expert ddr5 64gb 6400MT 34-44-44 is good value.. Even 6000MT 34-44-44 is great and probably same IC as their 6400MT ones

I never tried Teamgroup, but i have seen lot of recomendations of their kits so they must be pretty decent. I have only tested corsair vengeance kits and one gkill trident z kit and as you said the PMIC didnt even had a thermal pad on it....
Gskill uses a different heatspreader in a 6400mt/s kit ( I dont even remeber if it was dual rank or single rank ) maybe that kit has thermal pads on the ICs and on the PMIC but i dont even know 😅

candasulas · Mar 7, 2024

The Stilt said:
Don't bother with the ultra high-end stuff.
Not only is the performance benefit over the highest typical synced (1:1, MEMCLK:UCLK) frequency of 6000MHz questionable, the board in question WILL NOT be able to reach those extreme frequencies.

In my case, the absolute best case was 7600MHz and even at that frequency, the margins were far lower than what I personally would find acceptable for 24/7 use.

View attachment 2649835

I understood properly now. In order not to push my luck, I bought a 2x24gb Gskill kit, TridentZ5 Neo EXPO 6400mhz CL32. It works smoothly. Many people suggested I buy 2X16, but luckily I use 2x24GB without any problems.

candasulas · Mar 7, 2024

dansi said:
gskill ddr5 does not apply thermal pad on the pmic ic.
Corsair, Teamgroup, Klev are better options imo.
64gb is cheaper per gb than 48gb, if you need capacity.
64gb is usually dual ranked still, it gives abit more performance speed for speed than 32gb/48gb single ranked.

Teamgroup expert ddr5 64gb 6400MT 34-44-44 is good value.. Even 6000MT 34-44-44 is great and probably same IC as their 6400MT ones

Since some of the models you mentioned were not in stock (Klev, Corsair etc.), I preferred Gskill and it works smoothly as a 2x24gb kit with EXPO support.

Unfortunately, distributors do not deliver some rams. Finding it is a problem.

candasulas · Mar 7, 2024

The Stilt said:
How many verified cases you've seen, where a RPL (or a PHX) based CPUs is able to run at 3400MHz UCLK while maintaining sufficient margins (i.e., reliable in 24/7 use)?

Also, in case of extremely high MEMCLK frequencies such as the 8000MHz, the limit isn't the CPU itself but the motherboard. Achieving such frequencies require a high-end motherboard with good DRAM signaling, or preferably a 1 DPC board design.

If 8000mhz causes problems, how can Asus add 8000mhz ram to the QVL list?
Gskill;
F5-8000J4048F24GX2-TZ5RK
F5-8000J4048F24GX2-TZ5RS

They tested it with these two models and added it to the QVL list. The operating speed is stated as 8000Mhz. It is specified with 40-48-48-128 timings and 1.35v.

Frankly, if the processor IMO can cause problems at 7200mhz (they say so in terms of stability) and above, then this should not have been added to the QVL list.

Everyone mostly prefers 6000-6400 mhz kits.

ADHE · Mar 7, 2024

candasulas said:
If 8000mhz causes problems, how can Asus add 8000mhz ram to the QVL list?
Gskill;
F5-8000J4048F24GX2-TZ5RK
F5-8000J4048F24GX2-TZ5RS

They tested it with these two models and added it to the QVL list. The operating speed is stated as 8000Mhz. It is specified with 40-48-48-128 timings and 1.35v.

Frankly, if the processor IMO can cause problems at 7200mhz (they say so in terms of stability) and above, then this should not have been added to the QVL list.

Everyone mostly prefers 6000-6400 mhz kits.

Dont take the QVL list as something 100% accurate cause it isnt, in the case of asus only the gene has real support of 8000mt/s
Also if you are using a dual CCD cpu its preferable to run the dimms in 1:2 mode

The Stilt · Mar 7, 2024

candasulas said:
If 8000mhz causes problems, how can Asus add 8000mhz ram to the QVL list?
Gskill;
F5-8000J4048F24GX2-TZ5RK
F5-8000J4048F24GX2-TZ5RS

They tested it with these two models and added it to the QVL list. The operating speed is stated as 8000Mhz. It is specified with 40-48-48-128 timings and 1.35v.

Frankly, if the processor IMO can cause problems at 7200mhz (they say so in terms of stability) and above, then this should not have been added to the QVL list.

Everyone mostly prefers 6000-6400 mhz kits.

QVL is, always has been and always will be mostly useless, for several reasons.

It is not like the modules on the QVL would have gone through an extensive validation. It's something more of a test, which checks that the listed modules are able to POST, and the XMP / EXPO profiles is loaded correctly.

QVL is also mostly useless due to the fact, that the memory manufacturers keep changing the DRAM ICs and PCB designs between the different batches. Outside of the specific cases where the module specifications can only be met by a single DRAM IC, the components more often than not change at least at some point. For the mainstream modules, multiple hardware versions (i.e., IC and PCB) combinations) more often than not co-exists.

If you look at the specifications of this board, everything above 5200MHz is marked as "OC".
Anything related to overclocking cannot and will not be guaranteed.

The B650E-E is a great board, currently one of the best, if not the best AM5 motherboards overall IMO.
Regardless, there is exactly zero chance that this motherboard would currently be able to do 8000MHz "plug-n-play".
In this regard, it is no different to any of the other 2 DPC board designs (i.e., 4 DIMM slots).

If you (for whatever reason) want to play around at those higher memory clocks, get yourself a 1 DPC board (ITX or a X670E GENE).

dansi · Mar 12, 2024

Not one to doubt @The Stilt knowledge but in the amd ddr5 thread, there are more users getting 8000mt stable on latest bios, even DR dimm

will you be retesting Zen4 3d and share any interesting findings?

Another thing how about taichi lite? It looks even more attractive than strix b650e-e?

aleksandarivanovic80 · Mar 20, 2024

candasulas said:
Are there any performance or stability problems with 2x24gb kits?

Frankly, I thought of buying a 48GB kit instead of 32GB at first. It seemed like an intermediate solution to me without paying as much as 64GB.

I 'm using this kit on X670e Crosshair Hero board with 7950x, and it boots but it's unstable with 8000 MHz.

Sweet spot is 6400Mhz , Fclk 2133, tightened timings 28-38-38-33 Trfc1 510 at Voltage of 1.5.

With this setting I managed to lower latency on AiDa64 to 59ns, with read speeds around 93000Mb/s, writing speed around 97000 mb/s, and copy speed around 87000 Mb/s.

This kit is maybe better suited for Intel platforms which supports 8000 MT/s.

aleksandarivanovic80 · Mar 20, 2024

candasulas said:
I understood properly now. In order not to push my luck, I bought a 2x24gb Gskill kit, TridentZ5 Neo EXPO 6400mhz CL32. It works smoothly. Many people suggested I buy 2X16, but luckily I use 2x24GB without any problems.

Best settings so far i pulled of with F5-8000J4048F24GX2-TZ5RK 2c24Gb kit
Ryzen 7950x X670E Rog Crosshair Hero

candasulas · Apr 1, 2024

ADHE said:
Dont take the QVL list as something 100% accurate cause it isnt, in the case of asus only the gene has real support of 8000mt/s
Also if you are using a dual CCD cpu its preferable to run the dimms in 1:2 mode

Isn't 1:2 mode activated when you open EXPO automatically?
Frankly, I don't know much about RAM overclocking or configuration. I have used DDR2-DDR3-DDR4 over the years. It was simpler to set them up. But DDR5 seemed more complicated to me.

What I want to do is to reduce the NS value of the RAMs I use a little more. My previous rams were DDR4 3600 with 5900X. That ram kit was running as 62NS.

candasulas · Apr 1, 2024

dansi said:
Not one to doubt @The Stilt knowledge but in the amd ddr5 thread, there are more users getting 8000mt stable on latest bios, even DR dimm

will you be retesting Zen4 3d and share any interesting findings?

Another thing how about taichi lite? It looks even more attractive than strix b650e-e?

Frankly, I was going to buy ASROCK X670E Taichi. The price was much more affordable than ASUS. But most of the components I use are ASUS. Keyboard Mouse Graphics Card and GPU Holder. For RGB, I chose ASUS B650E-E because it would be difficult to control them with ASROCK. This motherboard took some features from its older brother, the X670E-E. And it is a motherboard equivalent in power to the X670E-F and X670E-A models. It is even a better motherboard than the X570 Crosshair that I used with the 5900X, with its VRM, M2 Slots and USB features. Therefore, for me, B650E-E was sufficient in every respect.

candasulas · Apr 1, 2024

aleksandarivanovic80 said:
I 'm using this kit on X670e Crosshair Hero board with 7950x, and it boots but it's unstable with 8000 MHz.

Sweet spot is 6400Mhz , Fclk 2133, tightened timings 28-38-38-33 Trfc1 510 at Voltage of 1.5.

With this setting I managed to lower latency on AiDa64 to 59ns, with read speeds around 93000Mb/s, writing speed around 97000 mb/s, and copy speed around 87000 Mb/s.

This kit is maybe better suited for Intel platforms which supports 8000 MT/s.

Sorry for my late reply due to work.

When choosing a ram kit, I specifically wanted it to be over 32GB. Because I process photographs. I also use CAD/CAM applications. I did not buy 64GB because of the price. I chose 48GB instead to save a little more money. Frankly, 2x24GB is a pretty big kit for me.

But what stuck out to me was that as the delays increased with DDR5s, the NS delay also increased. I get a latency value of 76.1NS, with G.Skill Trident Z5 Neo RGB 48 GB (2x24) 6400 MHz CL32 F5-6400J3239F24GX2-TZ5NR RAM kit.

candasulas · Apr 1, 2024

aleksandarivanovic80 said:
Best settings so far i pulled of with F5-8000J4048F24GX2-TZ5RK 2c24Gb kit
Ryzen 7950x X670E Rog Crosshair Hero

I think the RAM kit I use will not work at these values. I think your RAM is 8000Mhz. This means that it works smoothly at these values at 6400Mhz.

gupsterg · Dec 19, 2024

Ichirou said:
Has anyone tried 8,000+ MHz and measured its performance compared to a synced 6,000 MHz configuration? Is there enough of a gain to bruteforce past that performance loss?

Don't know if stable and or cherry picked benches, link.

Asus ROG Strix B650E-E Motherboard Ram Selection

The Stilt

Paramount

dansi

ADHE

ADHE

candasulas

candasulas

candasulas

ADHE

The Stilt

dansi

aleksandarivanovic80

aleksandarivanovic80

Attachments

candasulas

candasulas

candasulas

candasulas

gupsterg

Top Contributors this Month

Recommended Communities