[SOLVED] 3200mhz dont boot pc, even alone

[loliveira103]

Hey guys! I bought a new pair of memory modules with a frequency of 3200MHz, totaling 32GB. My motherboard and processor support the specified quantity and frequency. However, I am unable to start the PC with these modules, whether individually or together. The only way I can start the computer is by using a 16GB kit with a frequency of 2666MHz. What could be the issue?

Two details:
1 - If I install an 8GB memory module with a frequency of 2666MHz alongside the 16GB module (which should be 3200MHz), the system starts but reduces the frequency to the lower one (as expected).
2 - None of the 3200MHz memory modules boot, not even into the BIOS. The PC turns on but freezes (requiring a power supply switch-off).


System:
Aorus Elite B550 rev 1.3
Ryzen 9 5900x
Hyper X ddr4 3200mhz 16gb x2
XPG 850w

 

[Lutfij]

Welcome to the forums, newcomer!

Are you mixing and matching two ram kits? If so, please pass on a link to both ram kits. BIOS version for your motherboard at this moment of time? Which slots are you dropping the ram into?

 

[CountMike]

Hey guys! I bought a new pair of memory modules with a frequency of 3200MHz, totaling 32GB. My motherboard and processor support the specified quantity and frequency. However, I am unable to start the PC with these modules, whether individually or together. The only way I can start the computer is by using a 16GB kit with a frequency of 2666MHz. What could be the issue?

Two details:
1 - If I install an 8GB memory module with a frequency of 2666MHz alongside the 16GB module (which should be 3200MHz), the system starts but reduces the frequency to the lower one (as expected).
2 - None of the 3200MHz memory modules boot, not even into the BIOS. The PC turns on but freezes (requiring a power supply switch-off).


System:
Aorus Elite B550 rev 1.3
Ryzen 9 5900x
Hyper X ddr4 3200mhz 16gb x2
XPG 850w

Are you sure you are plugging them in right slots ? Usually in A2 and B2 for first pair. B2 for single stick

 

[loliveira103]

Welcome to the forums, newcomer!

Are you mixing and matching two ram kits? If so, please pass on a link to both ram kits. BIOS version for your motherboard at this moment of time? Which slots are you dropping the ram into?

Hey Lutfij, thank you!

Regarding your question, no, my intention is not to mix the kits. I'm just trying to get the PC to boot with the new kits on the new motherboard. However, to start the machine with the new kit, I need to use one of the old modules; otherwise, it won't turn on. The BIOS is updated to the latest available version. Regarding the slots, I'm connecting them correctly as described in the manual: A2 and/or B2 (in fact, I've tried all of them).

Memory link: [link to the memory](https://a.aliexpress.com/_mM2ZBhm)

Model sent: HX432C16FB/16 for both modules.

Are you sure you are plugging them in right slots ? Usually in A2 and B2 for first pair. B2 for single stick

Yes, everything according to the manual!

 

[Misgar]

When you start up the computer with 2666MHz RAM fitted, go into the BIOS and check to see if RAM overclocking (XMP/EXPO/DOCP) is enabled.

If XMP memory overclocking is enabled, switch it off, save the BIOS settings and reboot the computer, leaving the 2,666MHz RAM in the computer.

Check to see if the memory frequency has dropped to 2,400 or 2,133MHz, implying you've disabled XMP and reverted to stock JEDEC speed for the RAM.

N.B. I'm guessing the 2,666MHz frequency of your old RAM is an XMP setting (stored in the SPD chip on the DIMM).

It's a good idea to confirm RAM speed now with a utility such as CPU-Z, HWInfo, HWMonitor, AIDA64, etc.
https://www.cpuid.com/softwares/cpu-z.html

Explanation:

What we're attempting is disable memory overclocking in the BIOS, BEFORE we fit the new memory. That way the new RAM might start up at a frequency below 3,200MHz.

If your computer booted up at 2,133 or 2,400MHz with the 2,666MHz RAM, proceed as follows.

Remove all sticks of 2,666 and fit the new 3,200MHz RAM.

Switch on the computer and keep your fingers crossed.

If you're lucky, the new RAM will boot up at 2,133 or 2,400 with XMP disabled.

If the new RAM boots up successfully, check the speed again in CPU-Z.

Your BIOS might allow you to select slower XMP speeds, e.g. 2,666, 2,800, 2,933 and 3,000. If so, start at 2,666 and slowly work your way up.

If you think you've found a stable XMP speed for the new RAM above 2,666, run a stress test and/or MemTest86 to see if the system is stable.

 

[loliveira103]

When you start up the computer with 2666MHz RAM fitted, go into the BIOS and check to see if RAM overclocking (XMP/EXPO/DOCP) is enabled.

If XMP memory overclocking is enabled, switch it off, save the BIOS settings and reboot the computer, leaving the 2,666MHz RAM in the computer.

Check to see if the memory frequency has dropped to 2,400 or 2,133MHz, implying you've disabled XMP and reverted to stock JEDEC speed for the RAM.

N.B. I'm guessing the 2,666MHz frequency of your old RAM is an XMP setting (stored in the SPD chip on the DIMM).

It's a good idea to confirm RAM speed now with a utility such as CPU-Z, HWInfo, HWMonitor, AIDA64, etc.
https://www.cpuid.com/softwares/cpu-z.html

Explanation:

What we're attempting is disable memory overclocking in the BIOS, BEFORE we fit the new memory. That way the new RAM might start up at a frequency below 3,200MHz.

If your computer booted up at 2,133 or 2,400MHz with the 2,666MHz RAM, proceed as follows.

Remove all sticks of 2,666 and fit the new 3,200MHz RAM.

Switch on the computer and keep your fingers crossed.

If you're lucky, the new RAM will boot up at 2,133 or 2,400 with XMP disabled.

If the new RAM boots up successfully, check the speed again in CPU-Z.

Your BIOS might allow you to select slower XMP speeds, e.g. 2,666, 2,800, 2,933 and 3,000. If so, start at 2,666 and slowly work your way up.

If you think you've found a stable XMP speed for the new RAM above 2,666, run a stress test and/or MemTest86 to see if the system is stable.

Hello Misgar, thank you for your reply!

Regarding your comment, the motherboard, memories, and processor are new. The new memories were the first ones to be installed on the motherboard. Initially, there was no boot or BIOS at all. When I installed the old memories, the system booted up and entered the BIOS. There, I was able to see the XMP profile of the old memories (with the new memories removed from the motherboard). However, when I installed one old module with one new module, the XMP option disappeared, and the frequency was reduced from 3200 to 2666 (the frequency of the old module). These new modules seem to lack an included XMP...

Update on the tests: My wife's computer has four Corsair 3000MHz modules (32GB). I installed these memories in my PC, and the BIOS was initialized with the XMP profile disabled. I enabled the profile for 3000MHz, and it's working. Therefore, the issue doesn't seem to be with the motherboard.

Could it be a problem with the XMP of these new memories? Is it better if I buy new memories with an XMP profile included?

 

[Misgar]

Your motherboard is stable at 3000, but not at 3200. This is quite normal. On any motherboard, you reach a point where increasing the RAM frequency leads to instability, or complete failure to boot. On your board, without manual tweaking of Primary and Secondary timings, 3000 seems to be the limit.

What I was trying to achieve with switching off XMP, then fitting your new 3200 RAM, was to see if you could boot up at 2133 and check the SPD chips in your RAM to see if they had any XMP values lower than 3200. You could check these values with an old DIMM and a new DIMM fitted at the same time in CPU-Z.

If 3200 is the only XMP setting, you can manually overclock the RAM, if you have the time and the patience. This might involve relaxing some of the Primary settings, plus a few of the Secondary values. Sometimes all that is necessary is to increase the value of CL (CAS) one or two steps.

To proceed further, you need to read out the XMP values in your new RAM.

 

[loliveira103]

Your motherboard is stable at 3000, but not at 3200. This is quite normal. On any motherboard, you reach a point where increasing the RAM frequency leads to instability, or complete failure to boot. On your board, without manual tweaking of Primary and Secondary timings, 3000 seems to be the limit.

What I was trying to achieve with switching off XMP, then fitting your new 3200 RAM, was to see if you could boot up at 2133 and check the SPD chips in your RAM to see if they had any XMP values lower than 3200. You could check these values with an old DIMM and a new DIMM fitted at the same time in CPU-Z.

If 3200 is the only XMP setting, you can manually overclock the RAM, if you have the time and the patience. This might involve relaxing some of the Primary settings, plus a few of the Secondary values. Sometimes all that is necessary is to increase the value of CL (CAS) one or two steps.

To proceed further, you need to read out the XMP values in your new RAM.

I don't believe that having a stable frequency is normal, especially since the specifications and the manual indicate that 3200MHz is supported (and normal). Well, the thing is, I bought a new kit with two modules, with built-in XMP profile, the same frequency, and the same size... and it worked right away. No complications, no stress, no fuss. I simply plugged them in, the system booted up, I entered the BIOS, and selected the 3200MHz XMP profile. Both memory modules were stable... So, the problem is indeed with the kit without XMP.