F5F Stay Refreshed Hardware Desktop I mistakenly purchased the incorrect RAM module. Let me assist you in resolving this issue.

I mistakenly purchased the incorrect RAM module. Let me assist you in resolving this issue.

I mistakenly purchased the incorrect RAM module. Let me assist you in resolving this issue.

Pages (2): 1 2 Next
X
xXRAXERXx
Posting Freak
817
12-07-2022, 08:14 AM
#1
Hello, I just placed an order and got a PC built from parts I selected as a beginner. The next day I noticed I had the wrong RAM installed. My CPU is AMD Ryzen 7 7700, the motherboard is ASRock B850M Pro RS, and the RAM is G.SKILL Flare X5 32GB (2x16GB) DDR5 6400MHz. After buying the PC, I realized I should have chosen a 6000 MT/s CL30 instead of the 6400 MT/s CL32 I had. I now think my system runs around 4800 MT/s, which is what I expected. I read about adjusting RAM timings to match a 6000 MT/s CL30 configuration, but I’m completely confused and don’t know how to do it properly. Can someone explain this in simple terms?
X
xXRAXERXx
12-07-2022, 08:14 AM #1

Hello, I just placed an order and got a PC built from parts I selected as a beginner. The next day I noticed I had the wrong RAM installed. My CPU is AMD Ryzen 7 7700, the motherboard is ASRock B850M Pro RS, and the RAM is G.SKILL Flare X5 32GB (2x16GB) DDR5 6400MHz. After buying the PC, I realized I should have chosen a 6000 MT/s CL30 instead of the 6400 MT/s CL32 I had. I now think my system runs around 4800 MT/s, which is what I expected. I read about adjusting RAM timings to match a 6000 MT/s CL30 configuration, but I’m completely confused and don’t know how to do it properly. Can someone explain this in simple terms?

S
SkaxDK
Junior Member
47
12-07-2022, 10:43 PM
#2
The system runs perfectly at 6400Mhz CL32; just a slight challenge with Ryzen 7700. Even a 6000Mhz CL30 would start at 4800Mhz by default. To reach higher speeds, enable EXPO in the BIOS settings. If you need more details, feel free to ask and I’ll walk you through it. Here’s the method for ASRock motherboards supporting AM5.
S
SkaxDK
12-07-2022, 10:43 PM #2

The system runs perfectly at 6400Mhz CL32; just a slight challenge with Ryzen 7700. Even a 6000Mhz CL30 would start at 4800Mhz by default. To reach higher speeds, enable EXPO in the BIOS settings. If you need more details, feel free to ask and I’ll walk you through it. Here’s the method for ASRock motherboards supporting AM5.

A
acdaisy
Junior Member
3
12-08-2022, 04:54 AM
#3
6400MT/sec CL32 units are the typical standard in 2025. I own two of them, both systems are working properly. This upgrade improves performance over 6000MT/sec CL30. To achieve the speed, you need to modify the UEFI and turn on EXPO.
A
acdaisy
12-08-2022, 04:54 AM #3

6400MT/sec CL32 units are the typical standard in 2025. I own two of them, both systems are working properly. This upgrade improves performance over 6000MT/sec CL30. To achieve the speed, you need to modify the UEFI and turn on EXPO.

M
MoathyJr
Member
164
12-08-2022, 11:13 AM
#4
Thanks a lot. I believed I made a huge mistake.
M
MoathyJr
12-08-2022, 11:13 AM #4

Thanks a lot. I believed I made a huge mistake.

B
Beast_Child
Member
64
12-08-2022, 12:28 PM
#5
B
Beast_Child
12-08-2022, 12:28 PM #5

D
de3gutter
Junior Member
43
12-09-2022, 10:12 PM
#6
Activating XMP/EXPO for 6400 might cause a 2:1 clock mode if it boots, which could lower performance. This effect is probably unnoticeable to regular users but should be noted. Watch for signs such as UCLK matching MCLK or UCLK being half of MCLK. Prefer the first option—ideally you see 6400 running smoothly in perfect clock sync.
D
de3gutter
12-09-2022, 10:12 PM #6

Activating XMP/EXPO for 6400 might cause a 2:1 clock mode if it boots, which could lower performance. This effect is probably unnoticeable to regular users but should be noted. Watch for signs such as UCLK matching MCLK or UCLK being half of MCLK. Prefer the first option—ideally you see 6400 running smoothly in perfect clock sync.

F
ForeTheManGG
Member
189
12-27-2022, 05:02 PM
#7
In the worst scenario, you can adjust the speed to 6000 while maintaining CL32, resulting in only a small difference.
F
ForeTheManGG
12-27-2022, 05:02 PM #7

In the worst scenario, you can adjust the speed to 6000 while maintaining CL32, resulting in only a small difference.

I
Inezze009
Senior Member
716
12-29-2022, 01:52 AM
#8
To verify the relationship between UCLK and MCLK, you can analyze their timing signals using oscilloscope or logic analyzer data. Check if they share the same clock domain and confirm synchronization points.
I
Inezze009
12-29-2022, 01:52 AM #8

To verify the relationship between UCLK and MCLK, you can analyze their timing signals using oscilloscope or logic analyzer data. Check if they share the same clock domain and confirm synchronization points.

J
jaffercake59
Member
163
12-31-2022, 07:02 AM
#9
When using XMP/EXPO and pressing F10 to save and restart, the change appears as an option on the display. If not, navigate to OC Tweaker, then DRAM timing configuration, and select UCLK DIV1 Mode.
J
jaffercake59
12-31-2022, 07:02 AM #9

When using XMP/EXPO and pressing F10 to save and restart, the change appears as an option on the display. If not, navigate to OC Tweaker, then DRAM timing configuration, and select UCLK DIV1 Mode.

P
pixel_girl007
Member
52
12-31-2022, 07:17 AM
#10
Consider adjusting the settings to match the current configuration. Check the BIOS menu for options related to MCLK and UCLK. If available, updating to a value like 6000 may be more appropriate than 6400.
P
pixel_girl007
12-31-2022, 07:17 AM #10

Consider adjusting the settings to match the current configuration. Check the BIOS menu for options related to MCLK and UCLK. If available, updating to a value like 6000 may be more appropriate than 6400.

Pages (2): 1 2 Next