BIOS only detect half of my RAM Size

[sikorumbe]

Hi,
My gaming machine only 1 year old but out of the blue, my BIOS and Win7 64bit only detect half the size of my RAM.

My specs are:
Intel I7 4930K
Asus Rampage IV Black Edition
64gb Corsair Vengeance
Nvidia Geforce GTX780 Ti

All my RAM is detected as 8gb. Even when I plug it as a single slot (16gb). My Bios detect it as 8gb. I don't understand why this happens suddenly to all my RAM pieces. It really frustrated me.
Could anybody please help ?

http://postimg.org/image/tupzd86el/


http://postimg.org/image/8z3p1za7h/


http://


http://postimg.org/image/99b7lbotp/

 

[saint19]

Hi and welcome to Tom's forum.

So, you have 2x8GB sticks and the BIOS only report 8GB?

If that is the problem...test stick by stick in each RAM line, with "luck" you will find the problem.

 

[Tradesman1]

Try each stick individually (should show each as 8GB), then try in slots 1-3 from CPU (if it only shows 8GB still, try in slots 1-2 and let us know) and we'll go from there

 

[sikorumbe]

I have 4 x 16GB Corsair Vengeance. Thus, it's 64GB.

The funny thing is that, the RAM stick can only works in slot A, C, E, G. If I stick it in slot B, D, E, H the computer won't recognize it and it makes the 'no memory attached' beep.

As attached:
http://postimg.org/image/pahv0x96p/

 

[sikorumbe]

I tried all the slot, but it only show me as 8GB RAM whereas it supposed to be 16Gb.

 

[Tradesman1]

No the sticks are 8GB sticks, look at your last posted image, it shows the sticks model # cmy16gx3m2A1600c9, that model number is for a 2x8GB (total 16GB ) package of DRAM - so each stick is but 8GB

http://www.newegg.com/Product/Product.aspx?Item=N82E16820233535

 

[sikorumbe]

No. The stick is 16gb composed of (2 x 8gb memory onboard, because the chips is onboard for both sides). I think that's what the picture is trying to say. Because I'm pretty sure I'm paying the prices for 64GB of RAM.

 

[Tradesman1]

NO, it's a set of two sticks each are 8GB - it states it rather clearly in the the link

"CORSAIR Vengeance Pro 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model CMY16GX3M2A1600C9"

Sorry but I go through around 100 + sets of DRAM a year and have used a few of these sets - if you take a look you will find hardly any DDR3 sticks that are 16GB except for ECC (server/workstation) type DRAM

 

[sikorumbe]

Oh ic. Thank you for the solution.
I also tried the memory stick in my friend's computer. It also stated as 8gb.