View original (French)

Corsair DDR5 6000MHz showing as 4800 in BIOS

Solved
Rohaprod Posted messages 18 Status Membre -  
Rohaprod Posted messages 18 Status Membre -

Hello, I would like to know how to configure my RAM sticks in the BIOS.

I have enabled the Expo mode and set them even to 5200MHz, the maximum supported by the processor, but they are still displayed at 4800MHz. I don't understand.

I must have missed a step.

Config:

Motherboard: ASUS PRIME B650-PLUS

Processor: AMD Ryzen 9 7900X with DeepCool Watercooling LT720

Power Supply: Mars Gaming MPB1000

Graphics Card: GIGABYTE RX6600 EAGLE-8GD

SSD: Crucial T500 1TB PCIe Gen4 NVMe M.2, 7300MB/s

RAM: CORSAIR VENGEANCE RGB DDR5 32GB (2x16GB) 6000MHz CL30 AMD Expo

6 réponses

Réponse 1 / 6
flo88 Posted messages 28662 Registration date   Status Contributeur Last intervention   Ambassadeur 5 159
 

In the table, you don't have a frequency set at 5200mhz. It jumps from 4800 to 6000. This RAM kit is incompatible with the processor.

The only way to achieve that is to overclock the memory bus of the motherboard.

Signature
Waiting for other responses; I'm attracting trolls....
3
Rohaprod Posted messages 18 Status Membre 2
 

Ok thanks, I would have to settle for getting DDR5 at 5200 then..

I'm not worried about a few MHz either 4800/5200.

Is it dangerous for the PC to overclock the memory bus? And for the stability of the PC?

0
flo88 Posted messages 28662 Registration date   Status Contributeur Last intervention   5 159 > Rohaprod Posted messages 18 Status Membre
 

It is mainly complicated depending on the motherboards and often unnecessary, and yes, it can cause crashes.

2
Rohaprod Posted messages 18 Status Membre 2 > flo88 Posted messages 28662 Registration date   Status Contributeur Last intervention  
 

Ok thanks for the advice, I will check it out.

0
Réponse 2 / 6
flo88 Posted messages 28662 Registration date   Status Contributeur Last intervention   Ambassadeur 5 159
 

Hello

Install CPU-Z.

Post screenshots of the SPD and memory tabs.

Signature
Waiting for other responses; I attract trolls....
1
Rohaprod Posted messages 18 Status Membre 2
 

Hello, here is my capture.

Thank you.

0
Réponse 3 / 6
H0enheim Posted messages 1458 Registration date   Status Membre Last intervention   467
 

Hello Rohaprod.

Don't rely on the Asus BIOS welcome screen.
The important thing is that after modifying the RAM in your BIOS or enabling EXPO, you saved and exited (press F10 then Enter) and that it restarts
(That means it's OK);

In the Memory tab of CPU-Z, what does it show for DRAM Frequency?
Because in the screenshot, you're showing the SPD tab.

You need to multiply the frequency you see by 2
For example: if in the BIOS you set it to 5200, you should see 2600MHz (or 2599 in DRAM freq)
So with 4800MHz you should see 2400MHz; and 3000 or 2999MHz for the 6000MHz.


After that, test the stability of your system by gaming
If it bugs, you will need to lower the frequency in the BIOS;
1
Rohaprod Posted messages 18 Status Membre 2
 

Ok, thanks! for this information! I'll check that out as soon as I get home tonight. Yes, it's true that the system shouldn't be too unstable, but it's not necessarily for playing games; let's say a little bit, but it's mainly to do some music production, loading my instruments with Kontakt 7 and other VSTi that are very resource-intensive.

0
flo88 Posted messages 28662 Registration date   Status Contributeur Last intervention   5 159 > Rohaprod Posted messages 18 Status Membre
 

The frequency of the RAM won't change anything at this level; anyway, the difference is minimal and imperceptible between the two.

2
flo88 Posted messages 28662 Registration date   Status Contributeur Last intervention   5 159 > Rohaprod Posted messages 18 Status Membre
 

With software, the amount of installed RAM takes precedence over frequency.

It's better to have 32GB at 4800MHz than 16GB at 6000.

2
Rohaprod Posted messages 18 Status Membre 2 > flo88 Posted messages 28662 Registration date   Status Contributeur Last intervention  
 

As long as it works well, that's the main thing, clearly.

1
flo88 Posted messages 28662 Registration date   Status Contributeur Last intervention   5 159 > Rohaprod Posted messages 18 Status Membre
 

You need to multiply by two to get the operating frequency, so you are at 5200 MHz.

1
Réponse 4 / 6
Rohaprod Posted messages 18 Status Membre 2
 

Hello, here is the screenshot. Thank you.
0
Réponse 5 / 6
vieu bison boiteu Posted messages 44334 Registration date   Status Contributeur Last intervention   Ambassadeur 3 591
 

Hi flo88

What I had never checked in the specifications of the processors (or didn't pay attention to)

> DDR5 Memory - Memory Channels 2 <

Max Memory Speed

2x1R = DDR5-5200

2x2R = DDR5-5200

4x1R = DDR5-3600

4x2R = DDR5-3600

The frequency difference for 1 dual channel kit - and for 2 dual channel kits

=> it's better to take a 2x 16 GB kit than to take a 4x 8 GB kit

=> so, a two stick kit for gaming; and four sticks for software

@+
0
flo88 Posted messages 28662 Registration date   Status Contributeur Last intervention   5 159
 

Hello

Yes indeed, but this kind of specification based on the used slots is only seen with DDR5, it's very rare with DDR4, though I don't know why.... except that the R stands for "Rank" which basically defines the number of chips soldered on the module.

1
Réponse 6 / 6
Rohaprod Posted messages 18 Status Membre 2
 

Oh yes, well seen.
0