[SOLVED] 4th ram stick issue.

[bdikkal]

Hi. I am having an issue with my ram upgrade attempt. I've been using my current setting (i7 9700k, 16 gb ram corsair veng 8x2 cl16 (3000 or 3200 mhz) , asus prime z390a. Today i bought 2 more sticks, identical as the ones i had, same brand, model, etc. Only difference is these are cl 15.

After i install the sticks, the pc will be pwered but all I see is a black screen cant even go to bios.

What i have checked so far:

All ram sticks work
All ram slots work
If i instal 1, 2, or 3 sticks in any combination, there's no problem, everything works. The issue is when i install the 4th ram stick (regardless of which stick it is or regardless of which slot i install it, pc wont start. The yellow light on the motherboard, which reads DRAM also turns on (yellow) and is stuck there.

I've tried turning mbbios settings to default, but so far no luck. Any ideas?

 

[Koekieezz]

it could be that the motherboard couldnt use the 2 and 4 slot at dual channel (since both your cpu and mobo support 4 sticks at dual channel), the case almost the same with my friends EVGA Z97 FTW where the 4th stick ram didnt work but all the sticks were fine, so i assume that i couldnt do run slot 2 and 4 together when all the slot were populated.

 

[bdikkal]

it could be that the motherboard couldnt use the 2 and 4 slot at dual channel (since both your cpu and mobo support 4 sticks at dual channel), the case almost the same with my friends EVGA Z97 FTW where the 4th stick ram didnt work but all the sticks were fine, so i assume that i couldnt do run slot 2 and 4 together when all the slot were populated.

Thank youfor the answer. Does that mean there's nothing i can do to use all, 4 slots?

 

[Koekieezz]

if you still have the Warranty you could RMA to the respective brand service center, or if you want the simple way just by a new motherboard.

 

[bdikkal]

if you still have the Warranty you could RMA to the respective brand service center, or if you want the simple way just by a new motherboard.

Looks like the only real option for me is to use 1 stick and sell the other than thankz for the replies.

 

[sizzling]

Looks like the only real option for me is to use 1 stick and sell the other than thankz for the replies.

Mixing RAM kits is never guaranteed to work even if you use the exact same make and model, this is why it’s sold in matched kits.

Using an odd number of sticks will mean at best your RAM runs in a hybrid mode of 2x8gb in dual channel and 1x8gb in single channel. You could still have stability issues. If you can return the new set, sell the original and buy a 2x16gb kit that is guaranteed to work without issues.

 

[Koekieezz]

also if you want, set all the kits to CL16 so it might work. since mixing CL and different kits never guranteed to work like what sizzling said (but my 2x4GB DDR3 random brand per ram could run at CL9 @1600mhz, even tighten its secondary timing. guess you could try increase the CL, maybe it might work)

 

[bdikkal]

Mixing RAM kits is never guaranteed to work even if you use the exact same make and model, this is why it’s sold in matched kits.

Using an odd number of sticks will mean at best your RAM runs in a hybrid mode of 2x8gb in dual channel and 1x8gb in single channel. You could still have stability issues. If you can return the new set, sell the original and buy a 2x16gb kit that is guaranteed to work without issues.

Hi. Thanks for the advice. Retirning them is not an option unfortunayely, but if i have issues with the odd nr of ram, will defo consider selling and buying new. Cheers.