ram

[rhi]

Hello, so i have 32GB DDR5 6400 mhz ram and a gigabyte b650 aorus elite ax. the computer does not boot with ram installed in a2 and b2 but boots with ram installed in a1 a2 and its saying default clock speed is set to 2400 and is running at 1800. what could be wrong and how do i fix this? please help!!

[Cringe_Master245]

For the speed issue, try enabling amd EXPO.

[RONOTHAN##]

20 minutes ago, rhi said:

the computer does not boot with ram installed in a2 and b2 but boots with ram installed in a1 a2

Have you tried a single stick in slot B2 to see if that lets it boot? Also, just to make sure we're referencing the same slot order, it's A1-A2-B1-B2 if you're counting from the CPU, correct?

 

If the single stick in B2 doesn't let the system boot, reseat the CPU checking for bad pins, though if that doesn't fix it it's likely a bad motherboard. If it does fix it, it's either some weird memory incompatibility issue (unlikely but possible) or an issue with the BIOS revision, in which case a BIOS upgrade/downgrade should hopefully fix it. 

 

The speed issue is because XMP/EXPO isn't enabled, though this won't be fixable until you get the memory in the proper slots to get it to function. It's also worth mentioning that the advertised "frequency" isn't actually the frequency but the data rate, and since the DDR means double data rate, the frequency is half the advertised frequency and therefore the 2400MHz reported by CPU-Z means 4800MT/s. Also, DDR5 6400 is too fast for the AM5 memory controller to work in 1:1 mode reliably, so it will almost certainly default to 2:1 mode and delete a good amount of memory performance compared to if you dropped the speed to 6000 CL30 instead. 

[rhi]

9 minutes ago, RONOTHAN## said:

Have you tried a single stick in slot B2 to see if that lets it boot? Also, just to make sure we're referencing the same slot order, it's A1-A2-B1-B2 if you're counting from the CPU, correct?

 

If the single stick in B2 doesn't let the system boot, reseat the CPU checking for bad pins, though if that doesn't fix it it's likely a bad motherboard. If it does fix it, it's either some weird memory incompatibility issue (unlikely but possible) or an issue with the BIOS revision, in which case a BIOS upgrade/downgrade should hopefully fix it. 

 

The speed issue is because XMP/EXPO isn't enabled, though this won't be fixable until you get the memory in the proper slots to get it to function. It's also worth mentioning that the advertised "frequency" isn't actually the frequency but the data rate, and since the DDR means double data rate, the frequency is half the advertised frequency and therefore the 2400MHz reported by CPU-Z means 4800MT/s. Also, DDR5 6400 is too fast for the AM5 memory controller to work in 1:1 mode reliably, so it will almost certainly default to 2:1 mode and delete a good amount of memory performance compared to if you dropped the speed to 6000 CL30 instead. 

i did try it in b2 and it didnt boot. im gonna look at my cpu tomorrow to see if there’s anything wrong there

[rhi]

14 hours ago, RONOTHAN## said:

Have you tried a single stick in slot B2 to see if that lets it boot? Also, just to make sure we're referencing the same slot order, it's A1-A2-B1-B2 if you're counting from the CPU, correct?

 

If the single stick in B2 doesn't let the system boot, reseat the CPU checking for bad pins, though if that doesn't fix it it's likely a bad motherboard. If it does fix it, it's either some weird memory incompatibility issue (unlikely but possible) or an issue with the BIOS revision, in which case a BIOS upgrade/downgrade should hopefully fix it. 

 

The speed issue is because XMP/EXPO isn't enabled, though this won't be fixable until you get the memory in the proper slots to get it to function. It's also worth mentioning that the advertised "frequency" isn't actually the frequency but the data rate, and since the DDR means double data rate, the frequency is half the advertised frequency and therefore the 2400MHz reported by CPU-Z means 4800MT/s. Also, DDR5 6400 is too fast for the AM5 memory controller to work in 1:1 mode reliably, so it will almost certainly default to 2:1 mode and delete a good amount of memory performance compared to if you dropped the speed to 6000 CL30 instead. 

Hello again, I tried reseating my cpu/checking for bent pins and its all good. but still not booting in a2 b2. do you have any other possible solutions? or do you think its a dead memory slot? the thing is all of this is brand new and did this from first boot, could a dead slot still be the problem?

[RONOTHAN##]

1 hour ago, rhi said:

Hello again, I tried reseating my cpu/checking for bent pins and its all good. but still not booting in a2 b2. do you have any other possible solutions? or do you think its a dead memory slot? the thing is all of this is brand new and did this from first boot, could a dead slot still be the problem?

Just to confirm, is it still not booting with a single stick in B2? If not, then yes, the issue is a dead memory slot and you need to return and replace the motherboard. Just because it's new doesn't mean that's it's guaranteed to be free of issues, faulty products do make it past quality control from time to time. It sounds like you just got really unlucky. 

[rhi]

2 minutes ago, RONOTHAN## said:

Just to confirm, is it still not booting with a single stick in B2? If not, then yes, the issue is a dead memory slot and you need to return and replace the motherboard. Just because it's new doesn't mean that's it's guaranteed to be free of issues, faulty products do make it past quality control from time to time. It sounds like you just got really unlucky. 

I havent tried single stick in B2 again, I am gonna try updating BIOS and see if that does anything and if not I will try a single stick in B2 again and see what i can do about my motherboard