3.95 Usable RAM memory

[adriiancik01]

Hi. I recently built a new computer on Ryzen 5 2600. Bought 2x4 HyperX Fury 2666 MHz HX426C15FBK2/8.
I noticed a weird problem.. in computer specs it says 8 GB RAM (3.95 Usable). I cheched with CPU Z, it detects dual channel and both sticks, same in bios but still in task manager I have only 4 GB. Is this a problem or it's because of my windows?
Mobo : Gigabyte Aorus B450 M

 

[Colif]

Could try running memtest86 on both sticks, 1 stick at a time, up to 8 passes. Only error count you want is 0, any higher could be why Windows is ignoring the stick. remove/replace any sticks with errors.

is ram on motherboards compatibility chart?

 

[faalin]

Did you accidentally install a 32bit OS instead of x64?

 

[Colif]

Did you accidentally install a 32bit OS instead of x64?

Perhaps, though 32bit can't access that much ram anyway, it tops out about 3.5gb. If he has a GPU in PC it would be eating into memory addresses too.

 

[adriiancik01]

My windows is 64 bit. I tried every slot in particular, every single possibility, tested both sticks separately they work but when I set them in dual channel I have this problem. I tried single channel and all 8 GB work good, but why would I use single channel... Has someone any idea why dual channel isn't working? Is is some ram compatibility problem with MOBA?

 

[Colif]

your ram model isn't listed on the ram list for motherboard so its possible, all the hyperX memory mentioned starts with HX430C, whereas your ram is HX426C15FBK2 so just a few models away

You could ask on http://forum.gigabyte.us/ as I expect they would know for sure.

Do you have latest bios for motherboard as often bios updates can help with ram issues.