Ram issue

[BulletHail]

I have 3 sticks of ram, 2 are 8GB 3000Mhz and 1 is 16GB 2400mhzi tried replacing one of the 8gb sticks with the 16 and now my PC won’t boot, (black screen). I put the original ram back and it still won’t boot, any help? Thanks!

[BulletHail]

The PC turns on fine, no display

[BillBill]

3 minutes ago, BulletHail said:

The PC turns on fine, no display

If you are using two sticks make sure to have one placed into bank A-2 and the other in bank B-2 for the 3000Mhz. Trying to run mixed RAM might not work. But even if it could work the 2400Mhz stick would force the 3000Mhz sticks to downclock to 2400Mhz. Changing RAM normally makes the motherboard go through RAM training which can be slow depending on motherboard and CPU type. Having a blank screen during RAM training is normal. If your computer works with the mixed RAM you will probably have stability issues. 

[BulletHail]

1 minute ago, BillBill said:

If you are using two sticks make sure to have one placed into bank A-2 and the other in bank B-2 for the 3000Mhz. Trying to run mixed RAM might not work. But even if it could work the 2400Mhz stick would force the 3000Mhz sticks to downclock to 2400Mhz. Changing RAM normally makes the motherboard go through RAM training which can be slow depending on motherboard and CPU type. Having a blank screen during RAM training is normal. If your computer works with the mixed RAM you will probably have stability issues. 

So you recommend just waiting a bit?

[BillBill]

18 minutes ago, BulletHail said:

So you recommend just waiting a bit?

Yes just wait awhile and if nothing happens you'll have to use only the 2 8GB sticks. 

[Tetras]

Make sure the PC is fully off when you're changing RAM, you may need to clear the CMOS/pull the battery, but be wary of doing this if you have bitlocker enabled.

 

If you check the manual it can tell you the optimal config for 3 sticks, but you should be able to keep them all and put 2x8GB in one channel and 1x 16GB in the other.