My CPU only uses half of my ram as well as half the cores

[Calwong]

My CPU only uses half the ram I have (8GB out of 16GB) and half the cores (2 out of 4), I tried defaulting the BIOS but it still comes out at 2 cores (as before it used to use all the cores).

And the ram was always half of what I have got, and I have no idea how to use the rest of it.

CPU = AMD Athlon 2 X4 640
Windows 7 64bit

I have confirmed that the cpu only uses 8GBs and 2 cores with CPU-Z

My knowledge on BIOS, motherboards etc are very limited, please if you can explain in detail.

 

[Swordkd]

Not surprising about the Ram. There aren't a lot of programs out that will use over 8gb's of Ram. Also depends on the program, but most might only use 2 cores. I'd run prime95 and check to see if that program uses all 4 cores.

 

[Calwong]

Not surprising about the Ram. There aren't a lot of programs out that will use over 8gb's of Ram. Also depends on the program, but most might only use 2 cores. I'd run prime95 and check to see if that program uses all 4 cores.

Though windows is the program that is detecting it only has 8 GB while I have 16GB I also checked on CPU Z that slot 2 was the only ram card being used and slot 1 wasn't even though I know there is a ram card in there.

Oh and CPU Z can only see 2 cores. Before I messed with the BIOS it was fine and was using 4 cores but I cant go back to that as the default BIOS settings isn't doing the job.

Sorry I forgot to include this in but the program is Windows, not any other program

 

[JOOK-D]

How many RAM slots do you have? You shouldn't mix and match RAM brands or models, instead use the same model.

 

[logainofhades]

What motherboard do you specifically have? Also AMD tends to do thing the opposite of Intel for ram. Usually for AMD, ram slots 1 and 2 get used then 3 and 4.

 

[Calwong]

How many RAM slots do you have? You shouldn't mix and match RAM brands or models, instead use the same model.

I have 2 ram card slots same brand corsair

What motherboard do you specifically have? Also AMD tends to do thing the opposite of Intel for ram. Usually for AMD, ram slots 1 and 2 get used then 3 and 4.

My motherboard is ASRock N68C-S UCC

 

[logainofhades]

Max ram is 8gb for that board.

http://www.asrock.com/mb/NVIDIA/N68C-S%20UCC/?cat=Specifications

 

[Calwong]

Max ram is 8gb for that board.

http://www.asrock.com/mb/NVIDIA/N68C-S%20UCC/?cat=Specifications

Ok but I don't know how I use all the 4 cores since I messed with the bios and now it only uses 2, the default bios settings don't revert it back to 4 cores, as after I do so it still shows 2 cores on CPU a and 2 graphs on performance tab in task manager.

 

[logainofhades]

Try a CMOS reset via jumper or removing the battery from the motherboard. Make sure the system is unplugged.