Wierd ram propblems

[thauolar]

so i have 8 gb of gskill ripjaw x ram and i have the problem that my ram slowly fils up until about 7,5 of the 8 gb is in use and it only goes down if i reboot my pc.
 

I need to know if it is a software issue (reinstall my pc) or if it is hardware related (replace ram/motherboard)

 

Here are all my specs:

 

Os:Windows 7 enterprice 64 bit
Cpu:intel core i5 4690k

Ram:8 gb dual channel 799mz gskill ripjaw x

motherboard: gigabyte z97-hd3

Videocard: assus gtx 770

 

Thanks for the help

[DryzonDigital]

Is there something specific going on in the background when this happens? Pretty sure it's Software related imo 

[Umzipumzi]

Open task manager and sort by memory usage.

 

You should be able to see if there's anything sucking up all your ram.

[LogicalDrm]

No way this is hardware problem. Check that your pagefile is correctly set. It should be min 4gigs.