wierd ram issue with mobo

[orze]

so i had problems with my mobo for the longest. latly i set trying to atlast fix those and i seem to fix some. my pc works smother and turns on everytime.

but a problem i coulent fix is a ram issue i got with my ram slots.

i got 8 slots on my mobo

4 left of the cpu A AND B and 4 on the right C and D 

a and b stoped working a long time ago and i didnt care as much so i just got all my ram on the right side.

i wna try setting up my mobo better and ut the right slots in but i cant....a and b wont work

i thinked maybe there fried.

because wan i put 1 alone on a or b the ram isnt recognized.

but if i put 1 on a/b and 1 on c/d my pc starts with only c/d recognized. like a/b isnt there.

 

here where the wierd part gets. if i go into the bio. it SHOWS the ram is there on a/b it sees it and recognizes it. it just dosent use it....

it being there is recognized but not its "ram"

so the pc still shows like i got 4gb ram.

isnted of 8 from 1 on a/b and 1 on c/d like the manual says.would love some help with this,,,,

sorry for spelling wrote it on a shitty laptop....

 

update:

made a video that will help u understand my problem

 

the MOBO is a gigabyte x99 ud5 wifi.

ram is a CORSAIR Vengeance LPX 4GB 2400mhz.

[PineyCreek]

It would be good to know what type of RAM you are using as well as the exact model of motherboard you are using in this case.

[orze]

1 hour ago, PineyCreek said:

It would be good to know what type of RAM you are using as well as the exact model of motherboard you are using in this case.

TRUE. my bad.

 

the MOBO is a gigabyte x99 ud5 wifi.

ram is a CORSAIR Vengeance LPX 4GB 2400mhz.

 

i got 2 random rams i know that work from my bro pc to chack having the 2 in diffrent sides. and if u saw the video u would understand what happend.

[orze]

so....no1 can help?